Title of Invention

A WATER REDISPERSIBLE POWDER FOR REDUCING EFFLORESCENCE IN HYDRAULICALLY SET SYSTEMS

Abstract

The present invention relates to an additive for hydraulically binding systems for reduction of blooms in hydraulically bound systems, which is preferably present as a powder redispersible in water and is suitable in particular as additive for addition in dry mortars. The powder redispersible in water consists of a east one organic component and at least one water-soluble organic polymeric protective colloid and also if appropriate further additives, with the organic component containing at least one compound having a cyclic group which is completely or partially saturated and having a melting point of about -20 to 250 DEG C and also a molecular weight of about 100 to 10 000, and forming a stable dispersion in water with the water-soluble organic polymeric protective colloid, with the weight ratio of the organic component to the water-soluble organic polymeric protective colloid being about 95:5 to 5:95. The invention also relates to a process in which the drying step is omitted. The additive of the invention can be used in hydraulically binding masses, in particular in concrete, gypsum and/or lime and/or cement plasters, repair mortars and/or full heat protection mortars, jointing adhesives and/or tile adhesives, levelling compounds and/or fillers, non-shrink grouting and/or as additive for concrete coatings and for adhesives.

Full Text

The present invention relates to a powder redispersible in water for the reduction of efflorescence in hydraulically set systems based on at least one organic component and at1east one water-soluble organic polymeric protective colloid, to a process for its production including dispersion with subsequent drying, it being possible to omit the drying step, and to its advantageous use in particular as additive for hydraulically setting systems for the reduction of efflorescence in hydraulically set systems. Efflorescence is known to occur in particular in cementitious systems such as concrete, rendering and mortars. The expert means by it whitish deposits on the surface which are formed above all by leached-out calcium hydroxide which is react ed further by carbon dioxide from the air to for m calcium carbonate. In this case, further salt deposits imy also be present. Although such effect for esc enc e usually have major or influence on the physical values of the substrate, they are regarded a major nuisance particularly in the case of coloured or grey surfaces. Lacking alternatives, the for mulation developer frequently tries to prevent efflorescence by means of hydrophobic additives. In this case, the idea plays a part that, if no water is able to penetrate into the mortar layer, rendering layer or concrete layer, no calcium hydroxide can be washed out. However, this is an erronecus conelusion to be drawn: on the one hand, the freshly applied material still contains a lot of water which, together with dissolved salts, migrates to the surface. If the water evaporates, the salt residues remain as undesired residues. In addition, water can also diffuse from the other side through the hydraulically set meterial and thus have the same effect. . On the other hand, it is practically impossible to obtain absolute hydrophobicity. Even if the surface exhibits an excellent water repellency, it is sufficient, if only a little water penetrates inside, to leave a whit e residue behind after drying of the water droplet. Thus, many highly hydrophobic materials exhibit a stronger efflorescence effect than others, This shows also clearly that hydrophobicity and efflorescence are based on quite different mechanisms and are not comparable with each other. Thus, DE 103 23 205 A1, for example, describes a hydrophobing, water-redispersible additive based on fatty acids and their derivatives which contain water-soluble protective colloids and one or several compounds from the group of fatty acids and fatty acid derivatives which, under alkaline conditions, liberate fatty acid or the corresponding fatty acid anion, where required in combination with one or several organosilie on compounds. By using this additive in mortars, the water absorption is substantially reduced but not prevented. There is no mention of a possible reduction of efflorescence. Moreover, highly volatile organic components ( VOC) are usually for med by the alkaline hydrolysis of the fatty acid derivatives. US 3,423,219 describes a process for the production of Portland cement. During this process, an aqueous dispersion of a mixture of tall oil resin and high-boiling fractions of tall oil is preferably admixed to the Portlandcement as painting aid. The process for the production of such dispersions comprises, among other things , an alka1ine treatment and is consequently conplicated and expensive- The use of such systems for reducing efflorescence is not mentioned, Mor eover , no powders that are soluble or redispersible in water are described, which makes the use of dry mortars, in particular, impossible, GB 1,088,484 A describes a process for inhibiting efflorescence in concrete based on Portland cement. In this case, an aqueous dispersion of a mixture of tall oil resin and high-boiling fractions of tall oil, partially also mixed with asphalt, is preferably admixed to the concrete or subsequently applied onto the surface. The process for the production of such dispersions corrpris es , among other things , an alka1in e treatment and is consequently highly corrplicated and thus expensive, the dark to black colour of the mixture restricting its use considerably. To stabilise the dispersions, 0.1 to 15% by weight of proteins or polysaccharides are used. In addition, no powders soluble or redispersible in water are described, which makes the use in particular in dry mortars impossible. In DE 33 21 027 Al, a process is described by means of which a reduction of the efflorescence and a reduction of the water absorption, among other things, apparently occurs. During this process, terpene polymers, in particular of liquid low-molecular terpenes, are added as such or in mixture with other terpene hydrocarbons, which are added to the cement-containing building materials in a quantity of 0.1-10% by weight. The addition of the terpene-bas ed compounds takes place in the emulsified form or by spraying liquid or dissolved terpenes, precluding the use in dry mortars, among other things. Moreover, no details are provided regarding the type of terpenes used or the emulsifiers by way of which the terpene compounds are emulsified, JP 1 252 652 A describes an aqueous dispersion with an excellent stability for paper applications, for example. In this process, a hydrophobic substanc e with a low molecular weight is dispersed by means of a modified polyvinyl alcohol which contains a special cationic group, it being possible for the hydrophobic substance with a low molecular weight to be a resin. The aqueous dispersion described can be produced only with major effort since the polyvinyl alcohol with the cationic group must be produced first separately by means of the radical polymerisation of vinyl acetate and dimethyl amino ethyl vinyl ether, for exanple, with subsequent saponification of the copolymer. In addition, this dispersion is not obtainable in powder form and has a quite different field of application. In EP 874 471 Bl, a redispersible dispersion powder corrposition is described, which consists of a wat er-insoluble base polymer from the group of homopolymers and copolymers and a water soluble atomisation protective colloid which contains also up to 100% by weight, bas ed on the base polymer, of tackifying substanc es. The water-soluble atomising protactive colloid is a non-neutralised or a partially neutralised special polymer based on homopolmers or copolymers of olefinically unsaturat ed monocarboxylic acids or dicarboxylic acids or their anhydrides, the acid cont ent of the polymer amounting to 50 mole% or more. The pH of the aqueous redispersion is below 4.5. These systems can be used as adhesive composition but should also be used in cement-containing trowelling corrpounds, or in structural adhesives. However, these speciality polymers rapidly form corrplex corrpounds with calcium ions in hydraulically setting systems, and other ions which has a highly negative effect on hydration (substantial retardation) and on the mortar rheology (partial stiffening). For this reason, they have little suitability in particular for us e in cementitious systems. A possible reduction of efflorescence is not mentioned. EP 87 4 877 B1 describes a tackifyer powder composition redispersible in water containing one or several tackifying substances and 2 to 50% by weight of at least one conpound from the group of wat er-soluble low molecular homopolymers or copolymers of olefinically unsaturated monocarboxylic acids or dicarboxylic acids or their anhydrides, which contain, as copolymers, 2 to 50 mole% of further free radical polymer is able monomers and phenol sulphonic acid condensates, melamine sulphonic acid condensates and naphthalene sulphonic acid condensates with a water solubility of at least 10g in 100 g of water and a molecular weight of maximum 250,000g/mole. The tackifying substances are used as emulsif i er-stabilis ed dispersions and ar e not stabilised with these polymers. In addition, they are us ed as adhesives and not in cemaititious systems, in particular not for the reduction of efflorescence. EP 799 876 A2 describes an adhesive composition in powder form which contains at least one polymer based on at least one dispersion, at least one tackifying resin and, where required, one or several pr ot ective colloids as well as anticaking agents. This adhesive corrposition is suitable for adhesive-bonding porous and semi-porous substances, in particular as f looring adhesive. Use in hydraulically setting systems is not mentioned, in particular not the use for reducing efflorescence. Moreover, it is essential for a polymer based on at least one dispersion to be contained therein, which restricts the possibilities of formulation exceedingly. It has been the object of the invention to provide an additive which prevents or at least greatly reduces the efflorescence of hydraulically set systems, in particular those based on cement, such as e.g, in mortars, and in the case of concrete. In addition, the additive should be present in powder form in particular for the formulation of dry mortars in order to circumvent the known disadvantages of liquid raw iTHterials such as e. g. lack of resistance to freezing/thawing or limited storage stability, without the addition of toxic biocides and to allow sinple metering in the case of dry mortar formulations. However, it should also be possible to meter in the additive in the liquid form for selected applications such as e, g. the manufacture of concrete. In addition, it is essential that this additive be suitable for simply being stirred into the mortar rratrix mixed with water without special mixing proc ess es having to be taken int o account. In this case, it is also very irrportant that the additive can be thoroughly wetted in the mortar mixture, redispersed and easily homogeneously distributed in the matrix. In addition, it is irrportant that no disadvantageous or other mortar properties are obtained by way of the additive, i. e, it should be possible for the additive to be introduced into existing mortar formulations without their properties, such as e. g. the mortar rheology, being modified, except for the desired strong reduction of the efflorescence effect and, where applicable, an improvement in the hydrophobicity and/or adhesive capacity of the mortar. It should additionally be possible to meter the additive independently of other mortar raw naterials providing the formulator with a very high level of flexibility. In addition, it is important that the raw material costs and production costs of the dry mortar are not or only slightly altered by the additive. When producing the additive, it should, mor eover, be possible to simply vary the primar y particle size without problem in order to be able to adjust the final characteristics in a targeted manner. Moreover, it is advantageous if at 'least a major part of the additive can be obtained from renewable resources. Also, the additive should have no or only a very low hazards classification. Surprisingly enough, it was possible to achieve the corrplex object by way of a powder redispersible in water for reducing efflorescence in hydraulically set systems bas ed on at least one organic conponent and at 1east on e water-soluble organic polymeric protective colloid and, where required, further additives, whereas a) the organic c omponent containing at least one compound with a cyclic group, the compound being completely or partially saturated and having a melting point of approximately -20 to 250° C and a molecular weight of about 100 to 10,000 and the organic corrponent containing at erpenoid, a resin acid, colophony, terpene resin, t erpene-phenol resin and/or their d er i vat i v es , and b) f or ming, with the wat er-solubl e organic polymeric protective colloid, a stable dispersion in water, the wat er -soluble organic polymeric prot ective colloid having a content of monocarboxylic acid and dicarboxylic acid as well as their anhydrides of less than 50 mole% and not consisting of aromatic sulphonic acid condensat es and c) the weight ratio of the organic component to the water-soluble organic polymeric protective colloid being 95 : 5 to 5 : 95. The organic component with a conpletely or partially saturated cyclic group can be a synthetically produced product or a natural product. Suitable natural products are in particular resins such as gum rosin, wood rosin, tall oil resin and/or polyterpene resins, it being possible for these to be present in the modified and/or unmodified form, it being possible for the modification to be of natural or synthetic origin. Preferred terpeneoids are monot erpen es, s esquit erpen es , diterpenes , sesterterpenes , triterpenes , tetraterpenes and polyt erpen es. Terpene resins are typically obtained by the polymerisation of terpenes, diterpenes and/or limonenes and terpene-phenol resins can be produced by the acid-catalysed addition of phenols to terpenes and/or colophon y, but rrey also be bas ed on other subst anc es. It is important for the organic conponent to contain at least on e c yclic group. Monoc yclic , dic yclic , trieyclic , tetracyclic and/or pentacyclic groups are pr ef err ed. A special embodiment consists of organic conponents containing at least one cyclic group with a C5- ring and/or C6,- ring. In addition, the cyclic group can be completely or partially saturated- A special embodiment contains two or more C =C double bonds,- at 1east two being conjugated with each other. The organic corrponent may additionally contain at least one compound with one or several functional groups such as e, g, amine groups, amide groups, amidin e groups, imine groups, anhydride groups, ester groups, sulphate groups, sulphonat e groups and/or thiol groups. Comounds with carboxyl groups, carbon yl groups, aldehyde groups and/or alcohol groups are particularly pr ef err ed, whereas resin acids and their derivatives are particularly preferred. The following are, for example, suitable organic components: monoterpenes such as carrphor, camhoric acid, is onitrosocarrphor, camphor quinone, menthol. limonene, pinene, carrphor carboxylic acid and/or alkyl hydroxyl methylene carrphor as well as their derivatives and polymers produced therewith such as polyterpene resins, diterpenes such as e. g. neoabietic acid, levopinaric acid, pirraric acid, isopimaric acid, abietic acid, dehydroabietic acid, dihydroabietic acid, sylvic acid, palustric acid, colophony, retinal, tretinoine, agelasine E, agelasidine B, oxocativic acid, pinifolic acid, labdene dioic acid, dihydroxy- hallma-dien e dioic acid, epoxyclerodatri en eoic acid, isopi maradiene acid, isopimaric acid, isopi maradien e diol, isopiiraratri ene triol, junceic acid, podocarpinic acid, podocarpinol, ros eine III, hydroxyoxoros en olid e, c as sale acid, cassaidine, cassaine, cassamin e, auric ularic acid, cleistanthadienoic acid, is oc opal en e dial, abietadienoic acid, abi etic acid, dihydroxy- abtietatrienoic acid, lanugone A, carnosolic acid, abeo-abi etane, coleon P, c ycloabietane, beyerene triol, beyer ol, hydr oxybeyer enic acid, dihydroxykaurenic acid, dihydroxykaur enolid e, kahweol, methyl butanoyloxy- villanovan e diol, dihydr oxyatis enolide, dihydroxy- atisanone, atisene diol, gibberelline A18 gibberelline A1 gibber el line A3, giber el lie acid, grayanotoxene pent ol, leucothol, epoxygrayanot oxane pent ol, rhodojaponin III, leucothol C, xeniolite A, xeniaacetal and/or dihydroxys errulatanoic acid, isodict yohemiac etal and their derivatives, sester terpenes such as e. g. dysid eapalaun acid, dalvisyriacolide, salvil euc olid e methyl est er, epoxyhydroxyoxoophi obol adi enal, oxoophiobola t etraenal, ophiobolin A, ophiobolin G, dihydroxyscalarenolide and/or scalarin as well as their derivatives, triterpenes such as e. g, dipt erocarpol, hydr oxydammar en one II, damnar enolic acid, tirucallol, ursonic acid, clean onic acid, isomasticadienonic acid, fusidinic acid, acetoxydihydroxyfusidadienoic acid, helvolinic acid, masticadi enonic acid, diac et oxy-dioxof usidadi enoic acid, trihydroxyc ycloart enic acid. pineapple acid, pass if lor in, ac et oxytrihydroxy- cucurbitadi ene tri one, c ucur bit ac in B, cucurbitacin F, ursolic acid, pentahydroxycucurbitadi ene dione, hydroxyursanic acid, hydroxyursenic acid, pomolic acid, hydroxyoleanenoic acid, di hydroxyurs enic acid, boswellinic acid, hydroxyurs enic acid and/or hydroxy-oxoursenic acid and their derivatives, whereby the conponents list ed may also be pr es ent as a mixtur e and must not be understood to represent a limiting choice. Resin acids, in particular neoabietic acid, levopinaric acid, pi marie acid, isopi iraric acid, abi etic acid, dehydroabi etic acid, dihydroabi etic acid, s ylvic acid, palustric acid and/or colophony are particularly pr ef erred. The organic compon ent should have a melting point, determined by DSC (DIN 51007, of approximately -20 to 250° C, in particular of approxi net ely 0 to 200°C and particularly preferably of approximately 50 to 180° C. If the organic corrponent has a melting range and not an actual melting point, the average temperature of the melting range is used to determine the melting point. If, for example, no melting point can be determined becaus e of thermal decoirposition, the softening point or the average temperature of the softening point can be used as an alternative instead of the melting point. Moreover, the molecular weight of the organic corrponent should be between approximately 100 and 10,000, in particular between approxiiret ely 200 and 5000 and particularly pr ef erably between approxi mat ely 300 and 2500. In the case of low-molecular corrpounds, this is typically determined via the structural formula and in the cas e of higher mol ecular products by means of static light scatt ering* The organic corrponent is typically insoluble or only slightly soluble in water. In a special embodiment, it is not or only slightly soluble in acidic to n eutral water, the solubility being less than approxi nat ely 10% by weight, preferably less than approximately 1% by weight and in particular less than 0. 1% by weight. In a further pr ef erred embodi ment, the organic c onpon ent is partially or completely soluble in dilute caustic soda solution, the solubility being greater than approxi mat ely 0.01% by weight, pr ef erably gr eat er than approximately 0, 1% by weight and in particular greater than approxi rrat ely 1% by weight at a pH in the range of approxi KBt ely 8 to 12. The solubiliti es r elat e to a terrperature of 20° C, It is helpful for the water-soluble organic polymeric prote::tive colloid to form a stable dispersion with the organic corrponent in aqueous solution, the dispersion still has after 24 hours the same physical properties such as e, g. pH, viscosity, particle size and colour, and a s eparation, e. g. s ettling out of dispersion particles, does not occur. Sine e, depending on the t ype of organic coupon ent, dif f er ent wat er-soluble organic polymeric prot active colloids provide the desired dispersion stability, an organic polymeric prot active colloid may be ideal f or c ertain organic c orrpon ents, whereas an inc ompatibilit y imy occur with other organic coirponents. For this reason, the organic polymeric prot ective colloid must be matched to the organic conponent. Stabilising systems are preferred which allow, in a sirrple rrenner, the aqueous dispersion corrposition obtained to be converted into powders which are redispersible in water. Typically, suitable wat er-soluble organic polymeric prot ective colloids are pref erably higher molecular conpounds. These include natural corrpounds such as polysaccharid es which, wher e r equir ed, are chemically modif i ed, s ynthetic higher mol ecular oligomers and polymers which have either no or only a slightly ionic character and/or polymers which are produced in situ by means of monomers which have at least partially an ionic character, e. g, by means of radical polymerisation in an aqueous medium It is also possible to use only one stabilising s yst em or to c ombin e dif f er ent stabilising s yst ems which each other, Pol ysaceharides and polysaccharide ethers solubl e in cold water such as cellulose ethers, starch ethers ( amylose and/or amylopectin and/or their derivatives) , guar ethers and/or dextrins are polysaccharides and their derivatives are pr ef erably us ed. It is also possibl e to us e s ynthetic polysaccharides such as ani onic , n on ionic or cat ionic het eropolys ace har ides , in particular xanthan gum or wellan gum The polysaccharides rrey be chemically modified, but need not be so, e, g. with carboxy methyl groups, carboxyethyl groups , hydroxyethyl groups , hydroxypr opyl groups, methyl groups, ethyl groups, propyl groups and/or long-chain alkyl groups. Further natural stabilising syst ems consist of alginat es, peptides and/or prot eins such as e. g* gelatin e, cas ein and/or soya protein. Dextrins, starch, starch ethers, casein, soya prot ein, hydroxyalkyl c ellulos e and/or alkyl hydroxyalkyl cellulose are particularly preferred. Synthetic stabilising systems rray also consist of one or several protective colloids. 7^ an exarrples, there is /are on e or s everal polyvinyl pyrr olidon es and/or polyvinyl ac etals with molecular weights of 200 to 400 ,000 , conplet ely or partially saponif i ed and/or modified polyvinyl alcohols with a degree of hydrolysis of preferably approximately 70 to 100mole%, in particular approximately 80 to 98mole%, and a Hoppler vise osit y in 4% aqueous s olution of pr ef erably 1 to 50mPas, in particular of approxirret ely 3 to 40 mPas (measured at 20^C according to DIN 53015) and melamine f or maid eh yd e sulphonat es , naphthal en e f or maid eh yd e sulphonates, block copolymers of propylene oxide and ethylene oxide, styrene maleic acid copolymers and/or vinyl ether ■ maleic acid c opolymers. Higher molecular oligomers nay be nonionic, anionic ^ cat ionic and/or amphot eric emulsif i ers such as e. g. alkyl sulphonat es, alkyl ar yl sulphonat es, alkyl sulphat es, sulphat es of hydroxyl alcanols, alkyl sulphonates and alkyl aryl disulphonat es, sulphonat ed fatty acids, sulphat es and phosphat es of polyethoxylat ed alcanols and alkyl phenols as well as est ers of sulphosuccinic acid, quat ernar y alk yl ammonium salts ^ quat ernar y alk yl phosphonium salts, polyaddition products such as polyalkoxylat es, e. g, adducts of 5 to 50 mole ethyl en e oxide and/or propyl en e oxide per mole of lin ear and/or branched Ce- to C22- alcanols, alkyl phenols, higher fatty acids, higher fatty acid amines, primary and/or s ec ondar y higher alkyl amines, the alkyl groups being preferably a linear and/or branched Ce' to C22' alkyl group in each case* Synthetic stabilising systems, in particular partially saponifi ed, where r equir ed, modif i ed, polyvinyl alcohols are particularly pr ef err ed, it being possible f or one or s everal polyvinyl alcohols to be used together., where required with snell quantities of suitable emulsifiers. Preferred synthetic stabilising systems are, in particular, modif i ed and/or unmodified polyvinyl alcohols with a degree of hydrolysis of 80 to 98mole% and a Hoppler vise osit y as 4% aqueous s oluti on of 1 t o 50 mPas and/or polyvinyl pyrr olid one, Wat er-soluble organic polymeric prot ective c oil old s with a higher cont ent of carboxylic acid groups ar e, however, 1 ess pr ef err ed, in particular if they ar e produc ed by means of free radical polymerisati on. Thus, the c ont ent of monocarboxylic acids and dicarboxylic acids and their anhydrides should be less than 50mole%, preferably less than 25mole% and in particular less than 10mole%. Wat er-soluble organic polymeric prot active colloids consisting of aromatic sulphonic acid c ondensat es ar e, mor eover, also less pr ef erred. The weight ratio of the organic corrponent to the water-soluble organic polymeric prot active colloid depends above all on the rmt erials us ed and the affects to be achi eved. It may be approxi mat ely95: 5to5: 95, in particular approxinat ely 90 : 10 to 10 : 90 and pr ef erably approxi mat ely 80 : 20 to 20 : 80 and particularly pref erably approxirrat ely 70 : 30 to 30 : 70, The pH of the powder redispersible in water amounts, as 10% aqueous redispersion, t ypically to approxi mat ely 4.5 to 10,5, preferably approximately 5.0 to 9,5, but can in special cases such the addition of highly acidic or alkaline components, also be outside this range. The inventive powder redispersible in water may also contain further additives. The cont ent of additives, based on the sum total of the organic corrponent and the wat er-soluble organic polymeric prot ective colloid is subject to no critical limits. Thus, it may be very low and lie within the framework of approximately 0,01% by weight or more, in particular approximately 0.1% by weight and preferably approximately 1% by weight in the cas e of int erf ac e-active substanc es , f or exarrple. On the other hand, considerably larger proportions of additives can be admixed to the powder according to the invention, such as a, g. fillers or f ilm-f or ming dispersion powders redispersible in water which are t ypically obtain ad by drying s ynthetically produc ed f ilm-f or ming aqueous polymeric dispersions bas ed on emulsion polymerisation. In this cas e, up to approxi rrat ely 1000 parts , in particular approxi mat ely 500 parts and preferably approximately 100 parts of further additives can be added per one part of the inventive powder redispersible in water. There are no limits regarding the type of the further additives. As a rule, they play an irrportant part in the application of the powder according to the invention, but this is not essential* It is quite possibl e to add further organic polymeric prot ective colloids, the addition preferably taking place in the form of a powder in this case. Preferred additives consist of pulverous and/or liquid d ef oaming agents, wetting agents, alkyl polysaccharide ethers, hydroxyalkyl polysaccharide ethers and/or alkyl hydr oxyalkyl polysaccharide ethers such as c ellulos e ether, starch ether and/or guar ether, the alkyl group and hydroxyalkyl group typically being a Ci- to C^- group, synthetic polysaccharides such as anionic, nonionic or cationic het eropolysaccharides, in particular xanthan gum or wellan gum, cellulose fibres, dispersing agents , c ement super pi as tic is ers , s etting ace elerat ors , early strength ace elerat ors , s etting retard ers , air entrain ers, poly::arboKylat es , polycarboxylat e ethers , polyacr ylamides , corrplet ely and/or partially saponifi ed and, wher e requir ed, modif i ed polyvinyl alcohols , polyvinyl pyrrol id ones , polyalkylene oxides and polyalkylene glycols, the alkyl en e group being t ypically a C2- and/or a C3- group, which includes also block copolymers, dispersions and foam forming dispersion powders r edispersible in wat er bas ed on copolymers containing emulsi on polymers such as e. g. thos e bas ed on vinyl acetate, ethylene vinyl acetate, ethylene vinyl acetate vinyl versatate, ethylene vinyl acetate ( meth) acr ylat e, ethylene vinyl acetate vinyl chloride, vinyl acetate vinyl versatate, vinyl acetate vinyl versatate { meth) acr ylat e, vinyl versatat e ( meth) acr ylat e, all-( meth) acr ylat e, st yr ene acrylat e and/or st yr ene butadiene, hydrophobing agents such as silanes, silane est ers , siloxanes , silic on es , f att y acids and/or f att y acid esters, thickening agents, fillers such as quartzitic and/or carbonac eous sands and/or flours such as quartz sand and/or powd er ed li mest one, carbon at es , silicat es , layer silicat es , pr ecipitat ed silicic acid, light-weight fillers such as hollow microspheres of glass, polymers such as e. g, polyst yr ene spher es, aluminosilicat es, si lie on oxide, aluminium silicon oxide, calcium silicat e hydrat e, silicon dioxide, aluminium silicat e, magnesium silicat e, aluminium silicat e hydrat e, calcium aluminium silicat e, calcium silicat e hydrat e, aluminium iron magnesium silicat e, calcium metasilicat e and/or volcanic slag as well as pozzolanic mat erials such as metakaolin and/or lat ent hydraulic components. Especially particularly preferred additives are polymer dispersions, f ilm-f orming dispersion powders r edispersible in wat er, polysaccharid e ethers, superplasticisers and hydrophobing agents, in particular silanes , silane est ers , f att y acids , f att y acid esters and/or oleic acid and their esters as well as other derivatives. The invention relates also to a process for the' production of powders r edispersible in water, in particular for the production of the powders according to the invention, the organic corrponents being dispersed and stabilised, in a first step, with the wat er-soluble organic polymeric prot active colloid in wat er and the dispersion thus obtain ed being subsequently dried. In this pr oc ess, it is advantageous, but in no vjay ess ential f or the organic c orrponent to be mixed in the liquid or viscous form with the organic polymeric pr ot ective colloid pr e*dissolved in wat er. If the organic corrponent is present in the solid form at room t errperatur e, it may cons equent ly be us ef ul if it is heated. However, it is also possible for the organic c orrpon ent, in particular if it is insolubl e in wat er y. to be dissolved or swollen in an added additive and mixed, in this f or m, with the aqueous phas e with the organic polymeric P^ot active colloid. Suitable additives are frequently of a purely organic nature and present in the liquid form They consist e. g* of silan es , si Ian e est ers r silicones and/or siloxan es , liquid def earning agents and/or wetting agents, low molecular polyalkylen e glyc ols , f att y acids and/or f att y acid derivatives. In principle, all organosilicon compounds can be used as silanes, si lane est ers, silicones and/or siloxanes. However, it is advantageous, though not essential, if they are present in the liquid form and the boiling point of the organosilicon corrpounds is not too low at nor rrel pressure, pr ef erably appr oxi net ely 100° C or more. The organosilicon corrpounds rtey be soluble, insoluble or only partially soluble in water. In this respect, corrpounds are preferred which have either no or only limited solubility in water. Silicic acid esters with the formula Si(0R')4, organoxy silanes with the forrnula Sin(OR' ) 4-n with n = 3, polysilanes with the formula R3Si(SiR2)nSiR3 with n =0 to 500, preferably n = 0 to 8^ disiloxanes, oligosiloxanes and polysiloxanes of units with the general formula RcHdSi( OR' ) e( OH) ;PO( 4-c-d~e-f)/2 with c -0 to 3, d =-0 to 2, e -0 to 3, f -0 to 3 and the sum total of c+d + e+f per unit being maximum 3, 5, R' representing the same or dif f er ent alkyl radicals or alkoxy alkylene radicals with 1 to 4 C at oms , pr ef erably r epr es ent ing methyl or ethyl and R being the same or diff er ent and r epr es anting branched or un branched alkyl radicals with 1 to 22 C at oms, cycloalkyl radicals with 3 to 10 C atoms, alkylene radicals with 2 to 4 C at oms, aryl radicals, aralkyl radicals, alkyl aryl radicals with 6 to 18 C atoms, it being possible for the radicals R mentioned to be also substitut ed with halogens such as F or CI with ether groups, thioether groups, ester groups, amide groups, nitrile groups, hydroxyl groups, amine groups, carboxyl groups, sulphonic acid groups, carboxylic anhydrid e groups and carbonyl groups, it being possible in the case of the polysilanes for R also to have the meaning OR' . Pr ef err ed organosilicon compounds consist of t etraaIkoxysilanes, alkyl trialkoxysilanes , dialkyl dialkoxysilan es, it being possible f or lin ear and/or branched Ci- to C20 - alkyl groups to be us ed as alk yl groups and linear and/or branched Ci- to Cio - alkoxy groups to be us ed as alkoxy groups, methoxy groups, ethoxy groups and/or isopropoxy groups being preferably used as the latter. In addition, it is possible to use also a copolymerisable alkylene group such as e, g. a vinyl group, allyl group and/or ( meth) acrylic group in St ead of an alkyl group, Non-li mi ting exarrples ar e vinyl methyl dialkoxysilan e, t etraeth oxysi lane, methyl tripr op oxysi lane, methyl trieth oxysi lane, Y" chloropropyl triethoxysilane, p-nitrile ethyl tri- ethoxysilane, Y~^^^captopropyl triethoxysilane and y*^ mercaptopropyl trimethoxysilane, phenyl triethoxy silane, n-octyl triethoxysilane and isooctyl tri ethoxysilane, dipropyl diethoxysilane, triphenyl silanol as well as their preferably liquid condensation products, where required with other low-boiling and/or water-soluble silanes such as methyl trimethoxysilane, y-amino propyl triethoxysilane or other silanes containing amino functions, silanes containing quaternary ammonium salt groups and/or epoxy groups, carboxylic acid functional silanes and carboxylic anhydride functional silanes, disilanes such as dimethyl tetraalkoxydisilane, tetramethyl dialkoxy-silane, trimethyl trialkoxydisilane or their (co)condensates generally obtainable from the corresponding chlorine compounds. Methyl hydrogen polysiloxanes end blocked by trimethyl siloxy groups, mixed polymers end blocked by trimethyl siloxy groups of dimethyl siloxane units and methyl hydrogen siloxane units and dimethyl polysiloxanes exhibiting in the terminal units a Si-bonded hydroxy1 group are also particularly preferred. In order to disperse the organic component with the water-soluble organic polymeric protective colloid in water, average to strong shear forces are usually advantageous and often also necessary. It can take place batchwise, continuously, e.g. via static mixers, or semi-continuously both at room temperature and at elevated temperature. If the organic component has an elevated melting point and is not dissolved, in this process, in another liquid substance the dispersion can also take place at temperatures of more than 100°C, the operation then preferably taking place at elevated pressure. In order to avoid partial or complete decomposition of the organic component, it is also possible to operate under a protective gas atmosphere, where required. During the dispersion of the organic component in the water-soluble organic polymeric protective colloid, it is possible by the targeted adjustment of the different parameters, to vary in particular the particle size of the dispersion obtained. This includes the type and quantity of the water-soluble organic polymeric protective colloid. In the case of a very small particle size, a highly efficient distribution of the matrix used is achieved even with extremely small quantities, If the particle size is larger, the redispersed material develops its effect over a longer period* It is consequently frequently preferred to have a multi-modal particle size distribution at hand in order to have at hand both a high efficiency and a long-lasting effect, Thus, the average particle size of the particles dispersed in the dispersion may typically be between approximately 0.05 and SO^im, in particular between approximately 0*1 and 20 pm and preferably between approximately 1 and 10 jam, it being necessary to ensure that the particle size is not too large, particularly in the case of low viscosity dispersions, in order to prevent sedimentation. This is of less importance in the case of dispersions of higher viscosity. Regarding the solids content of the dispersion of organic components stabilised with the water-soluble organic polymeric protective colloid, the invention is subject to no critical limits at all. However, it is advantageous, as a rule, if the solids content is approximately 10 to 75% by weight, in particular approximately 25 to 65% by weight and preferably approximately 4 0 to 55% by weight. The dispersion obtained moreover typically has a Brookfield viscosity at 23^C, measured at 23°C and 20rpm according to DIN 53019, of approximately 100 to 50,O0OmPas, in particular approximately 500 to 25,000mPas and preferably approximately 1000 to 10,OOOmPas. Drying of the aqueous dispersion obtained preferably takes place by spray drying, freeze drying, fluid bed drying, drum drying and/or high speed drying, spray drying being particularly preferred and it being possible for spraying to take place by means of a spray wheels a single or multiple substance nozzle. Where required, the aqueous solution can in addition be diluted with water in order to obtain a viscosity suitable for drying. There are basically no particular limits regarding the drying temperature. However, particularly for safety considerations, it should, as a rule, not exceed approximately 200 '^C, in particular 17 5 '^C, In order to achieve sufficiently efficient drying, temperatures of approximately llC^C or higher, in particular approximately 12 0'C or higher, are preferred, The invention also relates to the process described, the drying step being omitted. The dispersion thus obtained is then processed in the liquid state, which is of relevance in particular in 2-component systems and industrial processing systems, such as in concrete. The process according to the invention also involves the addition of further additives which, depending on the type and/or the process technology possibilities, are, as an example, initially mixed with the organic component and/or with the water-soluble organic polymeric protective colloid, added to the aqueous dispersion obtained and/or admixed, as powder, during and/or after drying to the powder obtained. However, liquid additives can also be sprayed onto the powder during or after drying. Preferably, the liquid and/or water-soluble additives are added before, during or after dispersion and additives in powder form are preferably mixed during or after drying of the powder obtained. Preferred liquid and/or water-soluble additives are silanes, silane esters, siloxanes, fatty acids and/or their derivatives, wetting agents, defearning agents, control agents for cement hydration and/or for adjusting the rheology such as setting retarders^ setting accelerators^ cement superplasticisers, cement thickeners, air entrainers and/or film-forming aqueous polymeric dispersions based on emulsion polymers. Preferred additives in powder form consist of fillers, antleaking agents, film-forming dispersion powders redispersible in water based on emulsion polymers, polysaccharide ethers such as e.g. cellulose ether, starch ether and/or guar ether, control agents for cement hydration and/or rheology such as setting retarders, setting accelerators, cement superplasticisers and cement thickeners, air entrainers, cellulose fibres, dispersion agents, polyacrylamides, polycarboxylate ethers, hydrophobing agents in powder form, in particular based on silanes, silane esters and/or siloxanes, thickening agents, fillers such as carbonates, silicates, metakaolins and/or latent hydraulic components. The proportion of such additives can be very small, e.g. for interface-active substances and be within the region of approximately 0.01% by weight or more, in particular approximately 0.1% by weight and preferably approximately 1% by weight, based on the proportion of additive according to the invention. For other additives, such as fillers or film-forming dispersion powders redispersible in water based on emulsion polymers, this may amount to as much as approximately 1000 parts, in particular approximately 500 parts and preferably approximately 100 parts, based on one part by weight of the sum total of the organic component and the water-soluble organic polymeric protective colloid. A special embodiment is a process in which the aqueous dispersion obtained is dried jointly with the film-forming aqueous polymeric dispersion based on emulsion polymers, film-forming dispersion powders redispersible in water being obtained which greatly reduce the efflorescence in hydraulically set systems and, where required, prevent it completely. In addition, the aqueous dispersion may, where required, be added also to other dispersions to be dried, in particular those for rendering the hydraulically set compounds hydrophobic, e.g. to dispersions based on silanes, silane esters, siloxanes, silicones, fatty acids and/or fatty acid esters, after drying hydrophobing agents in powder redispersible in water being obtained form, which greatly reduce the efflorescence in hydraulically set systems and, where required, prevent it completely. In this connection, it is possible to mix the dispersion to be dried with each before drying and to spray and dry them jointly or to spray them separately simultaneously via a two-substance or multiple-sub stance nozzle and to dry them subsequently simultaneously with each other. If the other dispersion to be dried contains a sufficiently high proportion of water-soluble organic polymeric protective colloid such that free protective colloid is still available, the organic component may be dried also jointly with the other dispersion as an emulsifier-stabilised dispersion. The weight ratio of the organic component to free protective colloid must be at least approximately 95 : 5, preferably at least approximately 90 : 10, However, it is of advantage if the water-soluble organic polymeric protective colloid used for the production of the aqueous polymeric dispersion and for the production of film-forming dispersion powder redispersible in water is also selected in such a way that the content of monocarboxylic acids and dicarboxylic acids as well as their anhydrides is less than 50 mole%. Moreover, aromatic sulphonic acid condensates are also less preferred. The ratio of the two dispersions to be dried may be adjusted at random in line with the effect to be achieved. Thus, the proportion of solids in the dispersion according to the invention based on the powder dried jointly, may be approximately 0,1 to 99% by weight, preferably approximately 1 to 95% by weight and in particular approximately 5 to 80% by weight• The powder redispersible in water which is obtained typically exhibits a high level of wettability and redispersibility in water. Ideally, it redisperses on mere contact with water within a few seconds, if need be as a result of light stirring. In certain cases, it is also possible for somewhat stronger shear forces to be necessary. In any case, the shear forces occurring during normally executed mixing processes for dry mortars are as a rule sufficient to completely redisperse the powder according to the invention and to achieve a homogeneous distribution in the matrix to be redispersed. During this process, the particle size of the aqueous dispersion is obtained again before drying. In addition, the invention also relates to the use of a powder redispersible in water in hydraulically setting systems for the reduction of efflorescence in hydraulically set systems based on at least one organic component and at least one water-soluble organic polymeric protective colloid and, where required, other additives. The organic component contains at least one compound with a cyclic group which is completely or partially saturated and has a melting point of approximately -20 to 250^^0 and a molecular weight of approximately 100 to 10,000, the organic component being a terpeneoid, an resin acid, colophony, terpene resin, terpene-phenol resin and/or their derivative and forming a stable dispersion in water with the water-soluble organic polymeric protective colloid. The weight ratio of the organic component to the water-soluble organic polymeric protective colloid is approximately 95 : 5 to 5 : 95. In addition, 0 to approximately 1000 parts by weight, based on one part by weight of the sum total of the organic component and the water-soluble organic polymeric protective colloid^-at least one film-forming dispersion powder redispersible in water based on a film-forming dispersion and/or further additives may be contained therein. The invention moreover relates also to the use of an aqueous dispersion, produced according to the process described above, in hydraulically setting systems for the reduction of efflorescence in hydraulically set systems based on at least one organic component and at least one water-soluble organic polymeric protective colloid and, where required, further additives. The aqueous dispersion produced, based on 100 parts by weight of the sum total of the organic component and the water-soluble organic polymeric protective colloid, is based on approximately 5 to 95 parts by weight, preferably approximately 10 to 90 parts by weight, in particular approximately 20 to 80 parts by weight, of at least one organic component which contains preferably colophony, abietic acid, sylvic acid, neoabietic acid, levopinaric acid, pimaric acid, isopimaric acid and/or palustric acid and/or their derivatives, based on approximately 5 to 95 parts by weight, preferably approximately 10 to 90 parts by weight, in particular approximately 20 to 80 parts by weight of at least one water-soluble organic polymeric protective colloid, this representing at least one modified and/or unmodified polyvinyl alcohol with a degree of hydrolysis of approximately 70 to 100 mole%, in particular of approximately 80 to 98 mole% and a Hoppler viscosity as 4% aqueous solution of approximately 1 to SOmPas, in particular of approximately 3 to 40mPas (measured at 20°C according to DIN 53015) and/or polyvinyl pyrrolidone, and/or approximately 20 to 90 parts by weight, preferably approximately 25 to 90 parts by weight, of water-soluble organic polymeric protective colloid, this representing at least one natural and/or synthetically produced biopolymer, which, where required, is synthetically modified and is in particular starch, starch ether, dextrins, cellulose ether, casein and/or soya protein, In addition, 0 to approximately 500 parts by weight, preferably 0 to approximately 250 parts by weight, of at least one silane component and/or siloxane component as well as 0 to approximately 10,000 parts by weight, preferably approximately 0 to 2000 parts by weight of a film-forming aqueous polymeric dispersion, based on 100 parts by weight of the sum total of the organic component and the water-soluble organic polymeric protective colloid respectively may be contained therein. The proportion of solids of the aqueous dispersion is between approximately 10 and 7 0% by weight, in particular between approximately 2 5 and 65% by weight and preferably between approximately 4 0 and 55% by weight, the average particle size of the dispersed particles is between approximately 0.05 and 50pm, in particular between approximately 0.1 and 20 pm and preferably between approximately 1 and 10pm and the Brookfield viscosity amounts to approximately 100 to 50,000mPas and preferably approximately 250 to 25,000mPas and in particular approximately 500 to 10,OOOmPas, The inventive powder redispersible in water and the non-dried aqueous dispersion are preferably used in hydraulically setting compounds, in particular in concretes and dry mortars. Such dry mortar formulations contain, apart from the powder according to the invention, in particular at least one hydraulically setting binder and typically further mortar formulation additives, such as e,g, fillers such as sand, silicates and/or carbonates, organic binders such as film-forming dispersion powders redispersible in water based on emulsion polymers and/or polyvinyl alcohol, rheology control additives such as polysaccharide ether, casein, superplasticisers and/or thickeners and/or hydration control additives such as accelerators and/or retarders. The hydraulically setting binder is Portland cement, e.g. according to EN 196 CEM, I, II, III, IV and V, calcium sulphate in the form of a-hemi-hydrate and/or (3 ^hemi-hydrate and/or anhydrite, high alumina cement and/or lime, usually in the form of calcium hydroxide and/or calcium oxide. Portland cement, high alumina cement and/or calcium sulphate are preferred. The proportion of powder according to the invention is in this case 0.01 to 25% by weight, in particular approximately 0.1 to 10% by weight and preferably approximately 0.2 to 5% by weight, based on the hydraulically setting binder. If the non-dried aqueous dispersion is used, it can be added to the hydraulically setting formulation either as such and/or together with liquid polymer dispersions and/or other liquid additives either together with the mixing water or separately. The dry mortars containing the powder according to the invention are preferably used where the applied and dried mortars may come into more or less regular contact with water• Apart from typical applications in the open air such e.g. thermal insulation mortars, sealing compounds, gypsum- and/or lime and/or cement plasters, spray and/or repair mojrtars, spray and/or repair concretes as well as polymer cement concretes (PCC) and/or polymer cement spray concretes (S-PCC), these consist of tile grout adhesives, plywood mortars, bonding agent mortars, cementitious parquet adhesives, cement sizings, tile adhesives, levelling and/or trowelling compounds. In addition, the powders according to the invention and the non-dried aqueous dispersions can be used as concrete additive and/or as additive for a protective coating on concrete. In this respect, it is highly advantageous for the powder according to the invention and the dispersion according to the invention, apart from greatly reducing efflorescence, to behave in a rheology neutral manner in the hydraulically setting systems and in the quantities used, in particular if synthetic stabilising systems are employed. Moreover, the setting behaviour of the hydraulically setting system is influenced either not at all or only insignificantly. The good mixing behaviour, good wettability and easy processability of the mortar and concrete are also of great importance. Moreover, the hydrophobicity is also improved in many cases, which, as a rule, is a welcome additional effect• Moreover, it is also possible to use the powder according to the invention and/or the aqueous dispersion produced according to the process described in adhesives* In this case, it is particularly advantageous to use the powder in powder adhesives, in particular in cases where a high cohesion is desired as early as during the early drying phase. The invention is explained by way of the following examples. A) PRODUCTION OF AQUEOUS DISPERSIONS AND OF POWDERS REDISPERSIBLE IN WATER. EXAMPLE 1: PRODUCTION OF POWDER 1 lOOg of a 20% polyvinyl alcohol solution with a degree hydrolysis of 88 mole% and a Hoppler viscosity, as 4% solution, of 4mPas were heated to 85°C in a 500ml glass vessel with a propeller stirrer with stirring at lOOOrpm. Subsequently 20g of solid colophony (Fluka) were added slowly, the colophony being dispersed completely. A stable, light yellowish dispersion with a solids content of 33% by weight, a Brookfield viscosity at 23'*C of 10, OOOmPas at 20rpm and an average particle size of the dispersed particles of 9 yim which can be modified simply by changing the process parameters, was obtained. The dispersion obtained was dried without further additives by conventional spray drying at an initial temperature of 125^C to form a yellowish, free-flowing powder redispersing in water, whereby no contamination worth mentioning was observed in the spray tower and the yield was within the normal range. EXAMPLE 2: PRODUCTION OF POWDER 2 Example 1 was repeated, although 46,7g of solid colophony was added. A stable, light yellowish dispersion with a proportion of solids of 45% by weight, a Brookfield viscosity at 23°C of 1,OOOmPas and 2 0 rpm and an average particle size of 8 pm which could be modified simply by modifying the process parameters, was obtained. After spray drying, a yellowish, free-flowing powder redispersible in water was obtained, whereby no contamination worth mentioning was observed in the spray tower and the yield was within the normal range. EXAMPLE 3: PRODUCTION OF POWDER 3 25,Og of solid colophony were dissolved at room temperature in 25.Og of a liquid alkyl triethoxysilane with stirring in a 100ml vessel. A stable, low-viscosity, yellowish solution was obtained. The solution was added slowly at room temperature with stirring to 375g of a 20% polyvinyl alcohol solution with a degree of hydrolysis of 88 mole% and a Hoppler viscosity, as 4% solution, of 4mPas in an 800ml glass vessel. A light yellowish dispersion with a proportion of solids of 29% by weight was obtained which was adjusted to a pH of 7 with 0. IN caustic soda solution and subsequently spray dried as in example 1. A yellowish, free-flowing powder redispersible in water was obtained, whereby no contamination worth mentioning was observed in the spray tower and the yield was within the normal range, EXAMPLE 4: PRODUCTION OF POWDER 4 28g of the dispersion produced according to example 1 were added to 73g of an EVA-dispersion with a solids content of 51% by weight and a glass transition temperature Tg of -3°C and subsequently spray dried as in example 1. A yellowish free-flowing powder redispersible in water was obtained, whereby no contamination worth mentioning was observed in the spray tower and the yield was within the normal range, COMPARATIVE EXAMPLE 5: PRODUCTION OF POWDER 5 Example 1 was repeated, although 20g of solid stearic acid (Fluka) were added to the polyvinyl alcohol solution instead of colophony* A white dispersion with a proportion of solids of 33% by weight was obtained which was subsequently dried as in example 1 to form a white, free-flowing powder redispersible in water. COMPARATIVE EXAMPLE 6: PRODUCTION OF POWDER 6 Example 1 was repeated, although 20g of carnauba wax (Merck; consisting of approximately 8 5% wax esters) were added to the polyvinyl alcohol solution instead of colophony, A light yellowish dispersion with a proportion of solids of 33% by weight was obtained which was subsequently dried as in example 1 to form a light yellowish, free-flowing powder redispersible in water. EXAMPLE 7: PRODUCTION OF POWDER 7 30g of solid polyvinyl pyrrolidone (PVP-K90; Fluka) and 90g of water were heated to 85°C in a 500ml glass vessel with a propeller stirrer with stirring at lOOOrpm* After the polyvinyl pyrrolidone had dissolved, 30g of solid colophony (Fluka) were added slowly, the colophony being dispersed completely. A stable, light yellowish dispersion with a proportion of solids of 40% by weight, a Brookfield viscosity at 23'^C of 10,000mPas at 20rpm and an average particle size of 3-7pm which could be simply modified by modifying the process parameters, was obtained. The dispersion obtained was dried without further additives by conventional spray drying at an initial temperature of 125°C to form a yellowish, free-flowing powder redispersing in water, whereby no contamination worth mentioning was observed in the spray tower and the yield was within the normal range. EXAMPLE 8: PRODUCTION OF POWDER 8 To 200g of a commercially obtainable aqueous dispersion stabilised with anionic emulsifiers and based on a modified colophony and with a proportion of solids of 30% by weight were added 24g of a 25% polyvinyl alcohol with a degree hydrolysis of 88 mole% and a Hoppler viscosity, as 4% solution, of 4mPas, with stirring, A stable, light yellowish dispersion with a solids content of 29,5% by weight was obtained. The dispersion obtained was dried without further additives by conventional spray drying at an initial temperature of 125'C to form a yellowish, free-flowing powder redispersible in water, whereby no contamination worth mentioning was observed in the spray tower and the yield was within the normal range, EXAMPLE 9: PRODUCTION OF POWDER 9 To 150g of an aqueous dispersion stabilised with polyvinyl alcohol and based on vinyl acetate/vinyl versatate with a proportion of solids of 40,5% by weight, 30g of a commercially obtainable aqueous solution stabilised with amphoteric emulsifiers and based on a modified colophony and with a proportion of solids of 30% by weight and 30g of a 25% polyvinyl alcohol solution with a degree of hydrolysis of 8 8 mole% and a Hoppler viscosity, as 4% solution, of 4mPa were added, 1.5g of a defoaming agent were added to the dispersion thus obtained. Subsequently, dilution was carried out with water to a solids content of 25% by weight. The dispersion thus obtained was dried by conventional spray drying at an initial temperature of 125°C to form a light yellowish, free-flowing powder redispersible in water, whereby no contamination worth mentioning was observed in the spray tower and the yield was within the normal range. EXAMPLE 10: PRODUCTION OF DISPERSION 1 lOg of abietic acid (Fluka) were dissolved in 20g of spirit of turpentine (Fluka). A slightly viscous and slightly turbid solution was obtained. The solution was added slowly with stirring at room temperature to 150g of a 20% polyvinyl alcohol solution with a degree of hydrolysis of 88 ir[Ole% and a Hoppler viscosity, as 4% solution, of 4mPas. A stable, whitish dispersion with a solids content of 33% by weight was obtained. The dispersion obtained was used directly in the mortar mixture, COMPARATIVE EXAMPLE 11: PRODUCTION OF DISPERSION 2 10of naphthyl acetic acid (Fluka) were dissolved in lOg of acetone* The solution was added slowly with stirring at room temperature to 50g of a 20% polyvinyl alcohol solution with a degree of hydrolysis of 88 mole% and a Hopple r viscosity, as 4% solution, of 4mPas, A stable, whitish dispersion with a solids content of 43% by weight was obtained. The dispersion obtained was used directly in the mortar mixture, B) TECHNICAL APPLICATION TESTS USING DIFFERENT CEMENTITIOUS COMPOUNDS APPLICATION EXAMPLE 1: 35-0 parts of white Portland cement, 19,2 parts of quartz sand (0,08-0.2mm), 41.0 parts of calcium carbonate Durcal 65, 0,3 parts of a cellulose ether (viscosity as 2% aqueous solution: 3200mPas), 2.0 parts of the pigment Bayferrox 110 and 1.0 parts of construction lime were thoroughly mixed and used as basic dry mortar formulation. To this, different powders were added in varying quantities as shown in table 1, which could be stirred simply into the mortar matrix without further special mixing processes. The formulations were mixed in each case with 32 parts of water, based on 100 parts of dry formulation, using a 60mm propeller stirrer operating at a rate 950 rpm for 60 seconds, the quantity of mixing water indicated being added with stirring. After a maturing time of 3 minutes, the mortar was briefly stirred again by hand and applied by means of a serrated trowel onto an stoneware tile of a thickness of 6mm to an area of (196mm x 50mm), the tiles having been saturated with water immediately beforehand. Two different samples were produced in each case, the mortar having been applied by means of spacer rails in a layer thickness of 2.2mm (1.0mm respectively). The test specimens were subsequently mounted immediately to a container with water in a climatic chamber cooled to 7°C^ the water being warmed to a constant 20'^C. The container was designed in such a way that the test specimens were lying at least 5cm above the water surface and had an inclination at an angle of 45"" . The surface area not covered by the test specimens was covered and isolated such that water vapour penetrates through the carrier material into and through the test specimens. After a storage period of 7 days, the surface was assessed optically for efflorescence (eye and microscope) *TABLE 1: Technical application examples using a pigmented cementitious trowelling compound with a thickness of 2,2mm for assessing efflorescence. The mortar processability was good in the case of all the specimens and the mortar consistency comparable to the reference respectively. a) 'P" represents powder, 'D" dispersion. b) In the case of powders, the quantity used relates to the quantity of powder employed, in the case of dispersions to the solids content of the dispersion, c) Elotex SealSO is a redispersible hydrophobing agent based on a special silane and polyvinyl alcohols The results clearly show that all colophony-containing specimens suppressed the efflorescence so strongly or even eliminated them completely such that none could be observed even under the microscope. The reference specimens, on the other hand, exhibited very strong efflorescence. APPLICATION EXAMPLE 2: Samples produced in a manner analogous to those of the application example 1 were stored for 7 days at 23'C and a relative humidity of 50%. To assess the hydrophobicity, the time was subsequently determined, which passed until 5 drops of water (approximately 0.2g) had disappeared from the surface. TABLE 2: Technical application examples using a pigmented cementitious trowelling compound in a layer thickness of 2.2mm for assessing hydrophobicity, a), b), c): compare Table 1. The data in Table 2 show the excellent hydrophobing properties of Elotex SealSO^ although this provides no or only a slight reduction of efflorescence (compare other examples) . The powders according to the invention, on the other hand, exhibit also a good mortar hydrophobicity with a rising proportion,- apart from a strong reduction of the efflorescence, Powder 5 containing stearic acid, which is well known to be a hydrophobing agent, however, exhibits neither hydrophobicity nor a reduction of the efflorescence. APPLICATION EXAMPLE 3: Application example 1 was repeated, the layer thickness being adjusted to 1.0mm, TABLE 3: Technical application examples using a pigmented cementitious trowelling compound with a thickness of 1,0mm for assessing efflorescence. a), b), c): compare Table 1, The results show a clear reduction in efflorescence also in thinly applied mortars insofar as a powder according to the invention or a dispersion to the invention is used. Powder 4 in experiment No B-13 clearly shows also that the powder according to the invention can also be added to film-forming dispersion powders redispersible in water based on emulsion polymers, for example, and can be used as such i r. mixture. a), b), c): compare Table 1. The results listed demonstrate that the strong reduction of the efflorescence occurs also in a decorative pigmented render. APPLICATION EXAMPLE 5: 40.0 parts of white Portland cement, 3 parts of aluminate cement/ 50.0 parts of quartz sand 0.1-0-3mm, 2 parts of a hydrophobic, film-forming dispersion powder redispersible in water and based on an emulsion polymers (Elotex WS45), 1 part of cellulose fibre, 0.10 parts of tartaric acid and 2,0 parts of the pigment Bayferrox 110 and 1.0 part of construction lime were thoroughly mixed and used as basic dry mortar formulation. The formulations were mixed with 22 parts of water, based on 100 parts of dry formulation, in each case, and tested in a manner analogous to application example 1. TABLE 5: Technical application examples using a joint mortar in a layer thickness of 2.0mm for assessing efflorescence. The mortar processability was equally good in the case of all specimens and the mortar consistency comparable to the reference in each case. a), b), c): compare Table 1, The results listed demonstrate that the strong reduction of the efflorescence occurs also in a joint mortar. APPLICATION EXAMPLE 6: 32,0 parts of white Portland cement, 1 part of aluminate cement, 65.0 parts of quartz sand (0-0.2mm), 0,35 parts of calcium sulphate, 0.75 parts of a hydrophobic, film-forming dispersion powder redispersible in water and based on an emulsion polymers (Elotex HD1501), 0.25 parts of a superplasticisers based on melamine sulphonate, 0.1 part of a defearning agent in powder form, 0,5 parts of black iron oxide and 0.05 parts of a cellulose ether (viscosity as 2% aqueous solution: 4000mPas) were thoroughly mixed and used as basic dry mortar formulation. The formulations were mixed with 17.5 parts of water, based on 100 parts of dry formulation, in each case, and tested in a manner analogous to application example 1. TABLE 6: Technical application examples using a j oint mortar in a layer thickness of 2,0mm for assessing efflorescence. The mortar processability was equally good in the case of all specimens and the mortar consistency comparable to the reference in each case. a), b) r c): compare Table 1. The results listed demonstrate that the strong reduction or even the total prevention of efflorescence occurs not only in different joint mortars, but also in a wide varieties of different mortars. Surprisingly enough, only a very small proportion of these additives is used for this purpose, which has no or only a very minor effect on the other mortar properties - be it in fresh mortar or in the set state. Although the colophony used is classified as a hazardous substance, the hazards potential is reduced by the encapsulation of the colophony with polyvinyl alcohol. Moreover, handling usually causes essentially fewer problems since the powder is free-'f lowing and consequently conveying, metering and mixing can be carried out without major effort and often be automated. CLAIMS 1. Powder redispersible in water for reducing efflorescence in hydraulically set systems based on at least one organic component and at least one water-soluble organic polymeric protective colloid and, where required, further additives, characterised in that a) the organic component contains at least one compound with a cyclic group, the compound being completely or partially saturated and having a melting point of approximately -20 to 250°C and a molecular weight of about 100 to 10,000 and the organic component containing a terpeneoid, a resin acid, colophony, terpene resin, terpene-phenol resin and/or their derivatives, and b) forms, with the water-soluble organic polymeric protective colloid, a stable dispersion in water, the water-soluble organic polymeric protective colloid having a content of monocarboxylic acid and dicarboxy.ic acid as well as their anhydrides of less than 5 0mole%, and not consisting of aromatic sulphonic acid, condensates and whereas c) the weight ratio of the organic component to the water-soluble organic polymeric protective colloid is 95 : 5 to 5 : 95, 2. Powder according to claim 1 characterised in that the cyclic group of the organic component is a monocyclic, dicyclic, tricyclic, tetracyclic and/or pentacyclic group. 3. Powder according to at least one of claims 1 or 2 characterised in that the organic component is a natural product, in particular a monoterpene, sesquiterpene, diterpene, sesterterpene, triterpene^ tetraterpene, polyterpene and/or their derivatives, 4. Powder according to at least one of claims 1 to 3 characterised in that the organic component contains at least one compound with at least one carboxyl group, carbony1 group, aldehyde group and/or alcohol group. 5. Powder according to at least one of claims 1 to 4 characterised in that the organic component contains abietic acid, sylvic acid, neoabietic acid, levopinaric acid, pimaric acid, isopimaric acid and/or palustric acid and/or their derivatives, 6. Powder according to at least one of claims 1 to 5 characterised in that the organic component is not or only difficultly soluble in acidic to neutral water. 7 Powder according to at least one of claims 1 to 6 characterised in that the organic component is partially or completely soluble in dilute caustic soda solution. 8. Powder according to at least one of claims 1 to 7 characterised in that the water-soluble organic polymeric protective colloid represents a synthetic protective colloid, in particular in the form of a modified and/or unmodified polyvinyl alcohol with a degree of hydrolysis of 70 to 100 mole% and a Hoppler viscosity, as 4% aqueous solution, of 1 to 50mPas, measured at 20°C according to DIN 53015, and/or polyvinyl pyrrolidone. 9 Powder according to at least one of claims 1 to 8 characterised in that the water-soluble organic polymeric protective colloid represents a natural and/or synthetically produced biopolymer which, where required, is synthetically modified, and is in particular starch, starch ether, dextrins, cellulose ether, casein and/or soya protein. 10, Process for the production of powders redispersible in water according to at least one of claims 1 to 9, characterised in that the organic component is dispersed in water and stabilised with the water-soluble organic polymeric protective colloid and the aqueous dispersion obtained is subsequently dried. 11, Process according to claim 10 characterised in that the solids content of the dispersion of the organic component stabilised with the water-soluble organic polymeric protective colloid amounts to approximately 10 to 75% by weight, in particular approximately 25 to 65% by weight and the average particle size of the dispersed particles to approximately 0.05 to 50 µm, in particular approximately 0.1 to 20 µm, 12, Process according to claims 10 and/or 11 characterised in that before, during or after dispersion, further liquid and/or water-soluble additives and during or after drying further additives in powder form are added. Process according to at least one of claims 10 to 12 characterised in that, after drying, the redispersible powder is mixed with film-forming dispersion powders redispersible in water, redispersible hydrophobing agents in powder form, in particular based on silanes, siloxanes, silicones, fatty acids and/or fatty acid esters and/or polysaccharide ethers in powder form, Process according to at least one of claims 10 to 13, characterised in that the aqueous dispersion obtained is dried jointly with at least one other dispersion, in particular one based on film-forming polymers and/or silanes, silane esters, siloxanes, silicones, fatty acids and/or fatty acid esters, the dispersions concerned being mixed with each other in each case before drying or sprayed separately and subsequently dried j ointly, Process according to claim 14, characterised in that the aqueous dispersion is stabilised by means of emulsifiers and the at least one other dispersion contains an excess of water-soluble organic polymeric protective colloid in water or such an excess is added to it, the water-soluble organic polymeric protective colloid having a content of monocarboxylic and dicarboxylic acids and their anhydrides of less than 50 mole% and not consisting of aromatic sulphonic acid condensates. Powder redispersible in water obtainable according to the process according to claim 15, Use of the powder according to at least one of claims 1 to 9 and/or 16 in hydraulically setting systems for the reduction of efflorescence in nydraulically set systems, the hydraulically setting systems being dry mortar formulations, containing moreover at least one hydraulically setting binder and, where required, further mortar formulation additives, in particular fillers such as sand, silicates and/or carbonates, organic binders, in particular film-forming dispersion powder redispersible in water and/or polyvinyl alcohol, rheology control additives, in particular polysaccharide ethers, superplasticisers, thickeners and/or casein, hydration control additives, in particular accelerators and/or retarders. 3. Use of the powder according to at least one of claims 1 to 9 and/or 16 in hydraulically setting systems for the reduction of efflorescence in hydraulically set systems, the hydraulically setting systems being concrete, in particular spray and/or repair concrete, polymer cement concrete (PCC) and/or polymer cement spray concrete (S-PCC), gypsum and/or lime and/or cement plasters, repair mortar, spray mortar and/or thermal insulation mortars, tile grout adhesives and/or tile adhesives, sealing compounds, levelling and/or trowelling compounds, and/or as additive for protective coatings on concrete. 19. Use of a powder redispersible in water in hydraulically setting systems for reducing efflorescence in hydraulically set systems based on at least one organic component and at least one water-soluble organic polymeric protective colloid and, where required, further additives, characterised in that a) the organic component contains at least one compound with a cyclic group, the compound being completely or partially saturated and having a melting point of approximately -20 to 250°C and a molecular weight of about 100 to 10,000; the organic component being a terpeneoid; a resin acid, colophony, terpene resin, terpene-phenol resin and/or their derivative, and b) forms, with the water-soluble organic polymeric protective colloid, a stable dispersion in water, c) the weight ratio of the organic component to the water-soluble organic polymeric protective colloid is 95 : 5 to 5 :95, d) 0 to approximately 1000 parts by weight, based on one part by weight of the sum total of the organic component and the water-soluble organic polymeric protective colloid, at least one film-forming dispersion powder redispersible in water based on a film-forming dispersion being contained therein. 20. Use of an aqueous dispersion in hydraulically setting systems for the reduction of efflorescence in hydraulically set systems based on at least one component and at least one water-soluble organic polymeric protective colloid and, where required, further additives characterised in that the aqueous dispersion, based on 100 parts by weight of the sum total of the organic component and the water-soluble organic polymeric protective colloid contains a) approximately 5 to 95 parts by weight of colophony, abietic acid, sylvic acid. neoabietic acid, levopinaric acid, pimaric acid, isopimaric acid and/or palustric acid and/or their derivatives, b) approximately 5 to 95 parts by weight of water-soluble organic polymeric synthetic protective colloid, this representing preferably at least one modified and/or unmodified polyvinyl alcohol with a degree of hydrolysis of approximately 70 to 100 mole% and a Hoppler viscosity, as 4% aqueous solution, of approximately 1 to 50mPas and/or polyvinyl pyrrolidone and/or c) approximately 20 to 95 parts by weight of water-soluble organic polymeric synthetic protective colloid, this representing at least one natural and/or synthetically produced biopolymer which, where required, has been synthetically modified and is in particular starch, starch ether, dextrins, cellulose ether, casein and/or soya protein, and d) 0 to approximately 500 parts by weight of at least one silane and/or siloxane component, and e) 0 to approximately 10,000 parts by weight of at least one film-forming aqueous polymeric dispersion, the proportion of solids being between approximately 10 and 7 0% by weight, the average particle size being between approximately 0,05 to 5 0 µ.m and the Brookf ield viscosity, measured according to DIN 53019 at 23oC and 20rpm, amounting to approximately 100 and 50,000mPas. 21, Use of the powder according to at least one of claims 1 to 9 and/or 16 und/or the aqueous dispersion produced according to the process according to claim 10, omitting the drying step, in adhesives.

Documents:

1487-CHENP-2008 CORRESPONDENCE OTHERS 10-01-2014.pdf

1487-CHENP-2008 FORM-1 24-09-2014.pdf

1487-CHENP-2008 FORM-1 04 03-2013.pdf

1487-CHENP-2008 FORM-13 04 03-2013.pdf

1487-CHENP-2008 FORM-2 04 03-2013.pdf

1487-CHENP-2008 FORM-3 24-09-2014.pdf

1487-CHENP-2008 FORM-5 24-09-2014.pdf

1487-CHENP-2008 POWER OF ATTORNEY 04 03-2013.pdf

1487-CHENP-2008 AMENDED CLAIMS 24-09-2014.pdf

1487-CHENP-2008 AMENDED PAGES OF SPECIFICATION 24-09-2014.pdf

1487-CHENP-2008 CORREPONDENCE OTHERS 07-08-2014.pdf

1487-CHENP-2008 CORREPONDENCE OTHERS 07-08-2014.pdf

1487-CHENP-2008 CORRESPONDENCE OTHERS 04 03-2013.pdf

1487-CHENP-2008 EXAMINATION REPORT REPLY RECIEVED 24-09-2014.pdf

1487-CHENP-2008 FORM-1 07-08-2014.pdf

1487-CHENP-2008 OTHER PATENT DOCUMENT 18-09-2014.pdf

1487-CHENP-2008 OTHER PATENT DOCUMENT-1 18-09-2014.pdf

1487-CHENP-2008 OTHERS 24-09-2014.pdf

1487-CHENP-2008 FORM-18 25-08-2009.pdf

1487-chenp-2008-abstract.pdf

1487-chenp-2008-claims.pdf

1487-chenp-2008-correspondnece-others.pdf

1487-chenp-2008-description(complete).pdf

1487-chenp-2008-form 1.pdf

1487-chenp-2008-form 3.pdf

1487-chenp-2008-form 5.pdf

1487-chenp-2008-pct.pdf

Petition for Form 3.pdf

Petition for Proof of right.pdf