Title of Invention	ODOR CONTROL IN AMINE SALT CONTAINING COSMETIC COMPOSITIONS
Abstract	A cosmetic composition comprising : (i) a malonate salt formed from a first amine which is ammonia or dimethylaminoethanol and malonic acid; (ii) a second amine different from the first amine and having a molecular wefght no lower than about 100; (iii) from about 1 to about 99.9% by weight of a cosmetically acceptable carrier.

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J6830 FORM -2 THE PATENTS ACT, 1970 (39 of 1970) COMPLETE SPECIFICATION (See Section 10) ODOR CONTROL IN AMINE SALT CONTAINING COSMETIC COMPOSITIONS HINDUSTAN LEVER LIMITED, a company incorporated under the Indian Companies Act, 1913 and having its registered office at Hindustan Lever House, 165/166, Backbay Reclamation, Mumbai -400 020, Maharashtra, India The following specification particularly describes the nature of the invention and the manner in which it is to be performed. ORIGINAL 678/MUMNP/2004 GRANTED 19-4-2007 The invention concerns cosmetic compositions containing 5 ammonium salts, particularly those with organic acids, wherein is achieved control of odor emanating from released free amines. Amines of a sufficiently low molecular weight to be volatile leave an identifiable odor. As a class of materials, 10 volatile amines smell fish-like. This odor is usually unpleasant. Volatility and thereby smell is greatly reduced when the amines are quaternized in salt form. Quaternized amines have found particular usefulness in cosmetic compositions. 15 They have been used as cationic counterions to alpha- hydroxycarboxylic acids. Representative disclosures include U.S. Patent 4,105,782, U.S. Patent 4,105,783, U.S. Patent 4,197,316, U.S. Patent 4,234,599 and U.S. Patent 5,091,171 all to Yu and Van Scott. ' 20 WO 01/85129 A2 {Cole et al.) disclose the N,N- dimethylethanolammonium (DMAE) salts of dermatologically active acids. The latter are identified as alpha-hydroxy acid, ascorbic acid, lipoic acid and combinations thereof. Besides use of a first neutralizing agent such as DMAE, the 25 disclosure suggests use of a^'second neutralizing agent which may be an inorganic (e.g. sodium or potassium hydroxide), an amine (e.g. triethanolamine) or an amino acid (e.g. arginine, lysine or tyrosine). Organic acids other than alpha-hydroxy functionalized ones have been disclosed in the cosmetic literature. For instance, U.S. Patent 5,641,495 (Jokura et al.) discloses in combination a ceramide or pseudoceramide with a dicarboxylic acid and a salt 5 of a dicarboxylic acid. Malonic acid is the lowest molecular weight species of the group. The acids can be neutralized with alkanolamines, basic amino acids and ammonia. Hitherto the art has not focused upon the latent odor problem. This may have resulted from preoccupation with identifying 10 dermatologically active ingredients, rather than any concern over aesthetics. A particular advantage of the present invention is that a solution is proposed to the problem caused by release of free amine. 15 Thus, according to a first aspect there is provided a cosmetic composition which includes: (i) a malonate salt formed from a first amine which is ammonia or dimethylaminoethanol and malonic acid; (ii) a second amine different from the first amine and 20 having a molecular weight no lower than about 100; and (iii) from about 1% to about 99.9% by weight of a cosmetically acceptable carrier. Now it has been found that formulating a second amine into a 25 cosmetic composition containing a cationic ammonium salt (formed by a first amine reacting with malonic acid) prevents release of the first amine as a smelly volatile substance. Release often happens when the cosmetic composition is rubbed into the skin. Although not wishing to be bound by any theory, 5 it is possible that the high pH of skin releases the first amine from the salt thereby giving rise to the odor. Sometimes a forraulator may desire just the slightest hint of an amine smell as product is rubbed into the skin. By use of the second amine in measured amount, perhaps in the context of a 10 buffer, the cosmetic formulation can be tweaked to release a finite amount of amine fragrance on rub-in, yet avoid any lingering or continuous odor release. The second amine is preferred to have a molecular weight of at least 100, preferably greater than 120, more preferably at 15 least 149 and optimally at least 180. Representative of the second amine are polyethyleneimine, triethanolamine, tris(hydroxymethyl)aminomethane, triisopropanolamine, triethyleneglycol tetramine, tyrosine, glutamine, lysine, arginine and combinations thereof. 20 Advantageously but not necessarily the second amine will have a pKa no larger than the pKa of the first amine in released form. Typical pKa values are 7.82 and 8.3 0 respectively for such preferred second amines as triethanolamine and tris(hydroxymethyl)aminomethane (alternatively known as 25 tromethamine). Typical of the first amine is dimethylamino-ethanol with pKa of 9.81, First amines of the present invention are ammonia and dimethylethanolamine. Typical salts of the first amine include ammonium malonate, diammonium malonate, dimethylethanolammonium malonate and bis(dimethylethanolammonium)malonate. 5 Malonate salts of this invention can either be the half or fully neutralized salts or combinations thereof as represented by general formulas (I) and (II): II 10 wherein X is a protonated first amine. The present invention can utilize as the first amine neutralized salt, the mono-salt I, di-salt II or mixtures of WO 03/099238 PCT/EP03/05478 these salts. When mixtures are present the molar ratio of mono-salt I to di-salt II may range from about 1000:1 to about 1:1000, preferably from about 10:1 to about 1:500, more preferably from about 2:1 to about 1:200, optimally 5 from about 1:1 to about 1:20. Amounts of the first amine neutralized carboxylic acid salt may range from about 0.0001% to about 30%, preferably from about 0.1% to about 15%, more preferably from about 0.5% to about 10%, optimally from about 1% to about 8% by weight of 10 the cosmetic composition. Compositions of this invention will also include a cosmetically acceptable carrier. Amounts of the carrier may range from 1% to 99.9%, preferably from about 70% to about 95%, optimally from about 80% to about 90%. Among the 15 useful carriers are water, emollients, fatty acids, fatty alcohols, humectants, thickeners and combinations thereof. The carrier may be aqueous, anhydrous or an emulsion. Preferably the compositions are aqueous, especially water and oil emulsions of the W/0 or O/W variety. Water when 20 present may be in amounts ranging from about 5% to about 95%, preferably from about 20% to about 70%, optimally from about 35% to about 60% by weight. Emollient materials may serve as cosmetically acceptable carriers. These may be in the form of silicone oils, 25 synthetic esters and hydrocarbons. Amounts of the emollients may range anywhere from about 0.1% to about 95%, preferably between about 1% and about 50% by weight. WP 03/099238 PCT/EP03/05478 Silicone oils may be divided into the volatile and nonvolatile variety. The term "volatile" as used herein refers to those materials which have a measurable vapor pressure at ambient temperature. Volatile silicone oils are 5 preferably chosen from cyclic (cyclomethicone) or linear polydimethylsiloxanes containing from 3 to 9, preferably from 4 to 5, silicon atoms. Non-volatile silicone oils useful as an emollient material include polyalkyl siloxanes, polyalkylaryl siloxanes and 10 polyether siloxane copolymers. The essentially non-volatile polyalkyl siloxanes useful herein include, for example, polydimethyl siloxanes with viscosities of from about 5 x 10~ to 0,1 m2 /s at 25 C. Among the preferred non-volatile emollients useful in the present compositions are the 15 polydimethyl siloxanes having viscosities from about 1 x 10-5 to about 4 X 10-4 m2/s at 250 C. Another class of non-volatile silicones are emulsifying and non-emulsifying silicone elastomers. Representative of this category is Dimethicone/Vinyl Dimethicone Crosspolymer 20 available as Dow Corning 9040, General Electric SFE 839, and Shin-Etsu KSG-18. Silicone waxes such as Silwax WS-L (Dimethicone Copolyol Laurate) may also be useful. Among the suitable ester emollients are: (1) Alkenyl or alkyl esters of fatty acids having 10 to 25 20 carbon atoms. Examples thereof include WO 03/099238 PCT/EP03/05478 isoarachidyl neopentanoate, isononyl isonanonoate, oleyl myristate, oleyl stearate, and oleyl oleate. (2) Ether-esters such as fatty acid esters of ethoxylated fatty alcohols. (3) Polyhydric alcohol esters. Ethylene glycol mono and di-fatty acid esters, diethylene glycol mono- and di-fatty acid estex-s, polyethylene glycol (200-6000) mono- and di-fatty acid esters, propylene glycol mono- and di-fatty acid esters, polypropylene glycol 2000 monooleate, polypropylene glycol 2000 monostearate, ethoxylated propylene glycol monostearate, glyceryl mono- and di-fatty acid esters, polyglycerol poly-fatty esters, ethoxylated glyceryl mono-stearate, 1,3-butylene glycol monostearate, 1,3-butylene- glycol distearate, polyoxyethylene polyol fatty acid ester, sorbitan fatty acid esters, and polyoxyethylene sorbitan fatty acid esters are satisfactory polyhydric alcohol esters. Particularly useful are pentaerythritol, trimethylolpropane and neopentyl glycol esters of C1-C30 alcohols. (4) Wax esters such as beeswax, spermaceti wax and tribehenin wax. (5) Sterols esters, of which cholesterol fatty acid esters are examples thereof. WO 03/099238 PCT/EP03/05478 (6) Sugar ester of fatty acids such as sucrose polybehenate and sucrose polycottonseedate. Hydrocarbons which are suitable cosmetically acceptable carriers include petrolatum, mineral oil, C11-C13 5 isoparaffins, polyalphaolefins, and especially isohexadecane, available commercially as Permethyl 1O1A from Presperse Inc. Fatty acids having from 10 to 30 carbon atoms may also be suitable as cosmetically acceptable carriers. Illustrative 10 of this category are pelargonic, lauric, myristic, palmitic, stearic, isostearic, hydroxystearic, oleic, lnoleic, ricinoleic, arachidic, behenic and erucic acids. Fatty alcohols having from 10 to 3 0 carbon atoms are another useful category of cosmetically acceptable carrier. 15 Illustrative of this category are stearyl alcohol, lauryl alcohol, myristyl alcohol and cetyl alcohol. Humectants of the polyhydric alcohol-type can be employed as cosmetically acceptable carriers. Typical polyhydric alcohols include glycerol, polyalkylene glycols and more 20 preferably alkylene polyols and their derivatives, including propylene glycol, dipropylene glycol, polypropylene glycol, polyethylene glycol and derivatives thereof, sorbitol, hydroxypropyl sorbitol, hexylene glycol, 1,3-butylene glycol, isoprene glycol, 1,2,6-hexanetriol, ethoxylated 25 glycerol, propoxylated glycerol and mixtures thereof. The amount of humectant may range anywhere from 0.5% to 50%, preferably between 1% and 15% by weight of the composition. WO 03/099238 PCT/EP03/05478 Thickeners can be utilized as part of the cosmetically acceptable carrier of compositions according to the present invention. Typical thickeners include crosslinked acrylates (e.g. Carbopol 982®) , hydrophobically-modified acrylates 5 (e.g. Carbopol 1382®), cellulosic derivatives and natural gums. Among useful cellulosic derivatives are sodium carboxymethylcellulose, hydroxypropyl methocellulose, hydroxypropyl cellulose, hydroxyethyl,cellulose, ethyl cellulose and hydroxymethyl cellulose. Natural gums 10 suitable for the present invention include guar, xanthan, sclerotium, carrageenan, pectin and combinations of these gums. Inorganics may also be utilized as thickeners, particularly clays such as bentonites and hectorites, fumed silicas, and 15 silicates such as magnesium aluminum silicate (Veegum®) . Amounts of the thickener may range from 0.0001% to 10%, usually from 0.001% to 1%, optimally from 0.01% to 0.5% by weight. Cosmetic compositions of the present invention may be in any 2 0 form. These forms may include lotions, creams, roll-on formulations, sticks, mousses, aerosol and non-aerosol sprays and fabric (e.g. nonwoven textile)-applied formulations. Surfactants may also be present in cosmetic compositions of 25 the present invention. Total concentration of the surfactant when present may range from about 0.1% to about WO 03/099238 PCT/EP03/05478 40%., preferably from about 1% to about 20%, optimally from about 1% to about 5% by weight of the composition. The surfactant may be selected from the group consisting of anionic, nonionic, cationic and amphoteric actives. 5 Particularly preferred nonionic surfactants are those with a C10-C20 fatty alcohol or acid hydrophobe condensed with from 2 to 100 moles of ethylene oxide or propylene oxide per mole of hydrophobe; C10-C20 alkyl phenols condensed with from 2 to 2 0 moles of alkylene oxide; mono- and di-fatty acid esters 10 of ethylene glycol; fatty acid monoglyceride; sorbitan, mono- and di- C8-C20 fatty acids; and polyoxyethylene sorbitan as well as combinations thereof. Alkyl polyglycosides and saccharide fatty amides (e.g. methyl gluconamides) are also suitable nonionic surfactants. 15 Preferred anionic surfactants include soap, alkyl ether sulfates and sulfonates, alkyl sulfates and sulfonates, alkylbenzene sulfonates, alkyl and dialkyl sulfosuccinates, C8-C20 acyl isethionate, C8-C20 alkyl ether phosphates, C8-C20 sarcosinates and combinations thereof. 20 Sunscreen actives may also be included in compositions of the present invention. Particularly preferred are such materials as ethylhexyl p-methoxycinnamate,, available as Parsol MCX®, Avobenzene, available as Parsol 17 89® and benzophenone-3, also known as Oxybenzone. Inorganic 25 sunscreen actives may be employed such as microfine titanium dioxide, zinc oxide, polyethylene and various other polymers. Amounts of the sunscreen agents when present may WO 03/099238 PCT/EP03/05478 generally range from 0.1% to 30%, preferably from 2% to 20%, optimally from 4% to 10% by weight. Preservatives can desirably be incorporated into the cosmetic compositions of this invention to protect against 5 the growth of potentially harmful microorganisms. Suitable traditional preservatives for compositions of this invention are alkyl esters of para-hydroxybenzoic acid. Other preservatives which have more recently come into use include hydantoin derivatives, propionate salts, and a variety of 10 quaternary ammonium compounds. Cosmetic chemists are familiar with appropriate preservatives and routinely choose them to satisfy the preservative challenge test and to provide product stability. Particularly preferred preservatives are phenoxyethanol, 15 methyl paraben, propyl paraben, imidazolidinyl urea, sodium dehydroacetate and benzyl alcohol. The preservatives should be selected having regard for the use of the composition and possible incompatibilities between the preservatives and other ingredients in the emulsion. Preservatives are 20 preferably employed in amounts ranging from 0.01% to 2% by weight of the composition. Compositions of the present invention may include vitamins. Illustrative vitamins are Vitamin A (retinol), Vitamin B2, Vitamin Bs, Vitamin C, Vitamin E and Biotin. Derivatives of 25 the vitamins may also be employed. For instance, Vitamin C derivatives include ascorbyl tetraisopalmitate, magnesium ascorbyl phosphate and ascorbyl glycoside. Derivatives of Vitamin E include tocopheryl acetate, tocopheryl palmitate WO 03/099238 PCT/EP03/05478 and tocopheryl linoleate. DL-panthenol and derivatives may also be employed. Total amount of vitamins when present in compositions according to the present invention may range from 0.001% to 10%, preferably from 0.01% to 1%, optimally 5 from 0.1% to 0.5% by weight. Another type of useful substance can be. that of an enzyme such as oxidases, proteases, lipases and combinations. Particularly preferred is superoxide dismutase, commercially available as Biocell SOD from the Brooks Company, USA. 10 Skin lightening compounds may be included in the compositions of the invention. Illustrative substances are placental extract, lactic acid, niacinamide, arbutin, kojic acid, ferulic acid, resorcinol and derivatives including 4-substituted resorcinols and combinations thereof. Amounts 15 of these agents may range from about 0.1% to about 10%, preferably from about 0.5% to about 2% by weight of the compositions. A variety of herbal extracts may optionally be included in compositions of this invention. Illustrative are green tea, 20 chamomile, licorice and extract combinations thereof. The extracts may either be water soluble or water-insoluble carried in a solvent which respectively is hydrophilic or hydrophobic. Water and ethanol are the preferred extract solvents, 25 Also included may be such materials as retinoxytrimethylsilane (available from Clariant Corp. under the Silcare 1M-75 trademark), dehydroepiandrosterone (DHEA) WO 03/099238 PCT/EP03/05478 and combinations thereof. Ceramides (including Ceramide 1, Ceramide 3, Ceramide 3B and Ceramide 6) as well as' pseudoceramides may also be utilized but for many compositions of the present invention may also be excluded. 5 Amounts of these materials may range from about 0.000001% to about 10%, preferably from about 0.0001% to about 1% by weight. Colorants, fragrances, opacifiers and abrasives may also be included in compositions of the present invention. Each of 10 these substances may range from about 0.05% to about 5%, preferably between 0.1% and 3% by weight. The term "comprising" is meant not to be limiting to any subsequently stated elements but rather to encompass non-specified elements of major or minor functional importance. 15 In other words the listed steps, elements or options need not be exhaustive. Whenever the words "including" or "having" are used, these terms are meant to be equivalent to "comprising" as defined above. EXAMPLES 2 0 Except in the operating and comparative examples, or where otherwise explicitly indicated, all numbers in this description indicating amounts of material ought to be understood as modified by the word "about". The following examples will more fully illustrate the 25 embodiments of this invention. All parts, percentages and WO 03/099238 PCT/EP03/05478 TABLE I INGREDIENT WEIGHT % PHASE A Water Balance Disodium EDTA 0.05 Methyl Paraben 0.15 Magnesium Aluminum Silicate 0.60 Triethanolamine 1.20 PHASE B Xanthan Gum 0.20 Natrosol® 250HHR (ethyl cellulose) 0.50 Butylene Glycol 3.00 Glycerin 2.00 PHASE C Sodium Stearoyl Lactylate 0.10 Glycerol Monostearate 1.50 Stearyl Alcohol 1.50 Isostearyl Palmitate 3.00 Silicone Fluid 1.00 Cholesterol 0.25 Sorbitan Stearate 1.00 Butylated Hydroxy Toluene 0.05 Vitamin E Acetate 0.01 PEG-100 Stearate 2.00 Stearic Acid 3.00 Propyl Paraben 0.10 Parsol MCX® 2.00 Caprylic/Capric Triglyceride 0.50 Hydroxycaprylic Acid 0.01 C12-15 Alkyl Octanoate 3.00 PHASE D Diammonium Malonate 3.00 PHASE E Vitamin A Palmitate 0.10 Bisabolol 0.01 Vitamin A Acetate 0.01 Fragrance 0.03 Retinol 50C 0.02 WO 03/099238 PCT/EP03/05478 Example 2 A water-in-oil topical liquid make-up foundation according to the present invention is described in Table II below. TABLE II INGREDIENT WEIGHT % PHASE A Cyclomethicone 9.25 Cetyl Octanoate 2.00 Dimethicone Copolyol 20.00 PHASE B Talc 3.38 Pigment (Iron Oxides) 10.51 Spheron L-1500 (Silica) 0.50 PHASE C Synthetic Wax Durachem 0602 0.10 Arachidyl Behenate 0.30 PHASE D Cyc1omethicone 1.00 Trihydroxystearin 0.30 PHASE E Laureth-7 0.50 Propyl Paraben 0.25 PHASE F Fragrance 0.05 PHASE G Water Balance Ammonium Malonate 3.00 Tyrosine 0.50 Methyl Paraben 0.12 Propylene Glycol 8.00 Niacinamide 4.00 Glycerin 3.00 Sodium Chloride 2.00 Sodium Dehydroacetate 0.30 WO 03/099238 PCT/EP03/05478 Example 3 Illustrated herein is a skin cream according to the present invention. TABLE III 1 2 3 4 5 6 Isohexadecane, Presperse Inc., South Plainfield, NJ Polyaerylamide(and)C13-14 Isoparaffin(and) Laureth-7, Seppic Corporation, Fairfield, NJ dimethicone(and)dimethiconol, Dow Corning Corp. Midland, Sorbitan Monostearate and Sucrococoate, ICI Americas Inc Wilmington, DE Sucrose ester of fatty acid DMDM Hydantoin (and) Iodopropynyl Butylcarbamate, Lonza Inc., Fairlawn, NJ Example 4 A relatively anhydrous composition according to the present invention is reported in Table V. TABLE V INGREDIENT WEIGHT % Cyclomethicone 80.45 Dimethicone 9.60 Squalane 6.00 Isostearic Acid 1.90 Borage Seed Oil 0.90 Ammonium Malonate (5 0% in water) 0.50 Triethyleneglycol Tetramine 0.20 Retinyl Palmitate 0.25 Ceramide 6 0.10 Tocopherol 0.10 Example 5 10 An aerosol packaged foaming cleanser suitable for the present invention is outlined in Table VI. TABLE VI INGREDIENT WEIGHT % Sunflower Seed Oil 20.00 Maleated Soybean Oil 5.00 Silicone Urethane 1.00 Polyglycero-4 Oleate 1.00 Sodium C14-16 Olefin Sulfonate 15.00 Sodium Lauryl Ether Sulphate (25% active) 15.00 Cocoamidopropylbetaine 15.00 DC 1784® (Silicone Emulsion 50%) 5.00 Polyquaternium-11 1.00 Bis(dimethy lethanolammonium) Malonate 1.00 Triethanolamine 0.20 Water Balance 5 An aerosol is prepared using 92% by weight of the concentrate in Table VI and 8% propellant, the latter being a combination of dimethylether, isobutane and propane. Example 6 10 An adhesive cosmetic patch may also be formulated according to the present invention. An adhesive hydrogel is prepared by mixing 3 0 grams of 2-acrylamido-2-methylpropane sulphonic acid monomer in 2 0 grams distilled water and 5 grams of a 1% aqueous solution of methylene-bis-acrylamide. The solution 15 is then activated with 0.4% magnesium persulphate catalyst. Shortly after mixing the catalyst with the hydrogel solution, 0.1 grams ammonium malonate and 0.02 grams tris(hydroxymethyl)amino methane in 5 ml water is added. The resultant solution is coated onto a 50/50 blend of 2 0 polypropylene and hydrophilic polyester and allowed to solidify. The resulting deposited hydrogel is warmed for 24 hours at 4 0°C in a hot air oven. Final water content of the hydrogel is 50%. A polystyrene backing layer is laid over the adhesive hydrogel. Example 7 A disposable, single use personal towelette product is described according to the present invention. A 70/3 0 polyester/rayon non-woven towelette is prepared with a weight of 1.8 grams and dimensions of 15 cm by 20 cm. Onto this towelette is impregnated a composition as outlined in Table VII below. TABLE VII INGREDIENT WEIGHT % Ammonium Malonate 5.50 Tyrosine 2.00 Glycerin 2.00 Hexylene Glycol 2.00 Disodium Capryl Amphodiacetate 1.00 Gluconolactone 0.90 Silicone Microemulsion 0.85 Witch Hazel 0.50 PEG-40 Hydrogenated Castor oil 0.50 Fragrance 0.20 Vitamin E Acetate 0.001 Water Balance The foregoing description and examples illustrate selected embodiments of the present invention. In light thereof variations and modifications will be suggested to one skilled in the art, all of which are within the spirit and purview of this invention. WE CLAIM: 1. A cosmetic composition comprising : (i) a malonate salt formed from a first amine which is ammonia or dimethylaminoethanol and malonic acid; (ii) a second amine different from the first amine and having a molecular wefght no lower than about 100; (iii) from about 1 to about 99.9% by weight of a cosmetically acceptable carrier. 2. The composition as claimed in claim 1 wherein the second amine is selected from polyethyleneimine, triethanolamine, tris(hydroxymethyl) amino methane, triisopropanolamine, triethylene glycol tetramine, tyrosine, glutamine, lysine, arginine and combinations thereof. 3. The composition as claimed in any of the preceding claims wherein the second amine is an amino acid. 4. The composition as claimed in any' of the preceding claims wherein the second amine has a pKa no larger than a pKa of the first amine. 5. The composition as claimed in any of the preceding claims wherein the second amine has a molecular weight of at least 149. 6. The composition as claimed in any of the preceding claims wherein the first amine is dimethylaminoethanol. 7. The composition as claimed in any of the preceding claims wherein the first amine is ammonia.

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