| Title of Invention | "ELASTOMER-MODIFIED EPOXY SILOXANE COMPOSITION AND ITS METHOD OF MAKING" |
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| Abstract | An elastomer-modified epoxy siloxane composition prepared by combining: water; a silicone intermediate having the formula where each R1 is selected from the group consisting of hydroxy, alkyl, aryl and alkoxy groups having up to six carbon atoms, each R2 is selected from the group consisting of hydrogen, alkyl, and aryl groups having up to six carbon atoms and, wherein n is selected so that the weight-average molecular weight for the polysiloxane is in the range of from 400 to 10,000; a polyfunctional amine curative agent; an epoxy resin having at least two 1,2-epoxide groups; and an elastomeric resinous intermediate having a functionality selected from the group consisting of hydroxyl, epoxy, isocyanate, carboxyl, mercaptan, and amine, wherein said composition comprising in the range of from 1 to 40 percent by weight silicone intermediate, 1 to 15 percent by weight polyfunctional amine, 5 to 60 percent by weight epoxy resin, and 1 to 25 percent by weight elastomeric resinous intermediate. |
| Full Text | FIELD OF THE INVENTION This invention relates to epoxy resin based compositions useful for protective coatings and the like and, more specifically, to elastomer-modified epoxy siloxane polymer compositions having improved properties of flexibility, weather-ability, and chemical resistance. BACKGROUND OF THE INVENTION Epoxy siloxane compositions useful for application as coating materials are well known, and have gained commercial acceptance as protective and decorative coatings for steel, aluminum, galvanizing, wood and concrete in maintenance, marine, construction, architectural, aircraft and product finishing markets. While epoxy-based compositions have long been known for their desired properties of good adherence to substrates, corrosion resistance, and chemical resistance, and weatherability, they have suffered from less than ideal properties of weatherability and related gloss retention. Epoxy siloxane compositions were developed to provide improved properties of weatherability and gloss retention without sacrificing the desired properties of corrosion resistance and chemical resistance. U.S. Patent No. 4,250,074 discloses a known epoxy siloxane composition comprising an interpenetrating polymer network (IPN) of intertwined epoxy polymers and polysiloxane polymers. The composition is prepared by simultaneously polymerizing, at substantially balanced reaction rates, a mixture of epoxy resin and silane groups to form two intertwined networks of polymerized epoxy and polysiloxane throughout a resulting coating. An amine curing agent is used to form the polymerized epoxy network, and water is distributed throughout the mixture to cause hydrolytic A Folding Lampshade comprising top ring and bottom ring characterized in that the top ring is linked with the bottom ring through two compression members integral with the lampholder frame and two tension members; the compression members are provided with hinges; the two compression member get fixed in two bushes which in turn are fixed on the bottom ring and one of the tension member is hinged at both end and the other tension member is hinged at one end with the bottom ring and hooked with top ring under tension; the pleated shade gets hooked to the top ring though the cut slot of the shade cover and rests on the bottom ring. 4. BRIEF DESCRIPTION OF THE DRAWINGS The abo\e objective and advantages of the present invention will become more apparent by describing in detail preferred embodiments thereof with reference to the attached drawings in which reference numerals indicate corresponding parts in the figure. The invention is illustrated with the diagrams as follows: FIG. 1 is a diagram schematically illustrating the folding lampshade in assembled condition. FIG. 2 is a diagram schematically illustrating the folding lampshade in folding state. FIG. 3 is a diagram schematically illustrating the various stages of assembling the shade frame. FIG. 4 is a diagram schematically illustrating the assembly of the pleated shade cover onto the frame. 5. DETAILED DESCRIPTION OF DRAWINGS: Now, a folding lampholder according to a preferred embodiment of the present invention, and according to the method will be described in detail with reference to the attached drawings. Referring to Fig. 1, the top ring (a) is linked with the bottom ring (h) through two compression members (c) which are integral with the lampholder frame (f)- In the assembled state, these two compression members (c) get fixed in two bushes (g). which in rum are fixed on the bottom ring (h). The top ring (a) is also connected to the bottom ring (h) through tension member (d) which is hinged at both ends with the top and bottom rings; the other tension member (e) is hinged at one end with the bottom ring (h) and hooked with top ring (a) under tension. The lampholder frame (f) is fitted to the top ring (a) through two hinges (b). In the assembly process the following steps are taken as sho\Mi in Fig 3 1) First the top ring (a) Ls pulled up. making its top plane parallel to the bottom ring (h). 2) Holding the top ring (a), the lampholder frame (f) is pulled down to vertical position and in the process both the compression members (c) get aligned with the vertical plane and the ends of the compression members come closer to the anchoring bushes (g). 3) The compression members (c) are then anchored to the bushes (g) fitted on the bottom ring (h). When the compression members (c) are anchored to the bushes (g), the lampholder frame (f) gets locked in the vertical position as shown in fig. 3a &3b. 4) Then against the tension of the member (d), the other tension member (e) is hooked to the top ring (a), thus making the assembly of the lampshade frame complete. On assembly of the frame, the top ring (a) provides four equal segments for engagement with the pleated lampshade cover as shown in fig.3c. 5) For fixing the lampshade cover, as shown in Fig 4(i), the pleated cover is divided into four equal parts and then the cut end of the pleated cover is inserted on the four segment of the top ring (a). Now as shown in Fig.4 (ii), holding the lampshade frame with one hand and the pleated cover with the other hand, the pleated cover is pushed downward thus bringing the right sight of the cover on top as shown in Fig4 (iii). In this position the pleated shade gets hooked to the top ring though the cut slot of the shade and rests on the bottom ring. For dismantling the lampshade, the above steps are followed in reverse order. The Lampshade frame lends itself to be folded almost within the space of the bottom ring, with packing height limited to the height of the lampholder frame's ring (f) height as shown in Fig. 2 While this invention 1ms been particularly- shown and described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. claim :- An elastomer-modified epoxy siloxane composition comprising: water; a silicone intermediate selected from the group consisting of alkoxy and silanol-functional polysiloxanes having a weight-average molecular weight in the range of from 400 to 10,000; a polyfunctional amine curative agent; an epoxy resin having at least two 1,2-epoxide groups; and an elastomeric resinous intermediate having a functionality selected from the group consisting of hydroxyl, epoxy, isocyanate, carboxyl, mercaptan, and amine, wherein said composition comprising in the range of from 1 to 40 percent by weight silicone intermediate, 1 to 15 percent by weight polyfunctional amine, 5 to 60 percent by weight epoxy resin, and 1 to 25 percent by weight elastomeric resinous intermediate. The elastomer-modified epoxy siloxane composition as claimed in claim 1 wherein the polyfunctional amine curative is an aminosilane having the general formula (Formula Removed) where Y is H(HNR)a and where "a" is an integer of from 1 to 6, R is a difunctional organic radical independently selected from the group consisting of aryl, alkyl, dialkylaryl, alkoxyalkyl, and cycloalkyl radicals, and where X is limited to alkyl, hydroxalkyl, alkoxyalkyl or hydroxyalkoxyalkyl groups containing less than about six carbon atoms. The elastomer-modified epoxy siloxane composition as claimed in claim 1 wherein the elastomeric resinous intermediate is selected from the group consisting of epoxy resins, polybutene resins, polybutadiene resins, acrylonitrile resins polysulfide resins, and combinations thereof. 4. The elastomer-modified epoxy siloxane composition as claimed in claim 1 wherein the silicone intermediate is selected from the group consisting of alkoxy and silanol-functional polysiloxanes having viscosity of from 3,000 to 15,000 centipoise (cP) at 20NC. 5. An elastomer-modified epoxy siloxane composition as claimed in claim 1 wherein said composition comprising: the silicone intermediate is having the formula (Formula Removed) where each R1 is selected from the group consisting of hydroxy, alkyl, aryl and alkoxy groups having up to six carbon atoms, each R2 is selected from the group consisting of hydrogen, alkyl, and aryl groups having up to six carbon atoms and, wherein n is selected so that the weight-average molecular weight for the polysiloxane is in the range of from 400 to 10,000; an aminosilane curative having the general formula (Formula Removed) where Y is H(HNR)a and where "a" is an integer in the range of from 1 to 6, R is a difunctional organic radical independently selected from the group consisting of aryl, alkyl, dialkylaryl, alkoxyalkyl, and cycloalkyl radicals, and where X is limited to alkyl, hydroxalkyl, alkoxyalkyl or hydroxyalkoxyalkyl groups containing less than about six carbon atoms; an epoxy resin having at least two 1,2-epoxide groups; and an elastomeric resinous intermediate having a functionality selected from the group consisting of hydroxyl, epoxy, isocyanate, carboxyl, mercaptan, and amine, and being selected from the group consisting of epoxy resins, polybutene resins, polybutadiene resins, acrylonitrile resins, polysulfide resins, and combinations thereof. 6. An elastomer-modified epoxy siloxane composition as claimed in claim 1 wherein said composition comprising: water; a silicone intermediate having the formula (Formula Removed) where each R1 is selected from he group consisting of hydroxy, alkyl, aryl and alkoxy groups having up to six carbon atoms, each R2 is selected from the group consisting of hydrogen, alkyl, and aryl groups having up to six carbon atoms and, wherein n is selected so that the weight-average molecular weight for the polysiloxane is in the range of from 400 to 10,000; an aminosilane curative having the general formula (Formula Removed) where Y is H(HNR)a and where "a" is an integer in the range of from 1 to 6, R is a difunctional organic radical independently selected from the group consisting of aryl, alkyl, dialkylaryl, alkoxyalkyl, and cycloalkyl radicals, and where X is limited to alkyl, hydroxalkyl, alkoxyalkyl or hydroxyalkoxyalkyl groups containing less than about six carbon atoms; an epoxy resin having more than one 1,2-epoxide groups per molecule with an epoxide equivalent weight in the range of from 100 to 5000; and an elastomeric resinous intermediate having a functionality selected from the group consisting of hydroxyl, epoxy, isocyanate, carboxyl, mercaptan, and amine, and being selected from the group consisting of epoxy resins, polybutene resins, polybutadiene resins, acrylonitrile resins, and combinations thereof. 7. The elastomer-modified epoxy siloxane composition as claimed in any of claims 1, 5 or 6 wherein said composition optionally comprising at least one metal catalyst to facilitate cure at ambient temperature, wherein the catalyst is selected from the group consisting of zinc, manganese, zirconium, titanium, cobalt, iron, lead, and tin each in the form of octonates, neodecanates, or naphthanates. 8. The elastomer-modified epoxy siloxane composition as claimed in any of claims 1, 5 or 6 wherein the epoxy resin ingredient is selected from the group consisting of epichlorohydrin-bisphenol A epoxy resins, epochlorohydrin bisphenol F epoxy resins, hydrogenated bisphenol A epichlorohydrin epoxy resins, glycidyl methacrylate resins, glycidyl esters, phenol novalac epoxy resins, resorcinol-modified epoxy resins, and combinations thereof. 9. A method for making an elastomer-modified epoxy siloxane composition as claimed in any of the preceding claims comprising the steps of: forming a resin component by combining: an alkoxy or silanol-functional polysiloxane; with an epoxy resin; and an elastomeric resinous intermediate having a functionality selected from the group consisting of hydroxyl, epoxy, isocyanate, carboxyl, mercaptan, and amine, and being selected from the group consisting of epoxy resins, polybutene resins, polybutadiene resins, and combinations thereof; and curing the resin component in the presence of water at ambient temperature by adding thereto: a polyfunctional amine ingredient; and an organotin catalyst. 10. A method as claimed in claim 9 comprising the steps of: forming a resin component by combining: a polysiloxane having the formula (Formula Removed) where each R1 is selected from the group consisting of hydroxy, alkyl, aryl and alkoxy groups having up to six carbon atoms, each R2 is selected from the group consisting of hydrogen, alkyl and aryl groups having up to six carbon atoms and, wherein n is selected so that the weight-average molecular weight for the polysiloxane is in the range of from 400 to 10,000; with an epoxy resin having more than one 1,2-epoxide groups per molecule and having an epoxide equivalent weight in the range of from 100 to 5,000; and an elastomeric resinous intermediate having a functionality selected from the group consisting of hydroxyl, epoxy, isocyanate, carboxyl, mercaptan, and amine, and being selected from the group consisting of epoxy resins, polybutene resins, polybutadiene resins, and combinations thereof; and curing the resin component in the presence of water at an ambient temperature by adding to it: an organotin catalyst; and an aminosilane curative agent. |
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2127-DELNP-2004-Abstract-(04-02-2009).pdf
2127-DELNP-2004-Abstract-(24-02-2009).pdf
2127-delnp-2004-assignments.pdf
2127-DELNP-2004-Claims-(04-02-2009).pdf
2127-DELNP-2004-Claims-(09-02-2009).pdf
2127-DELNP-2004-Claims-(24-02-2009).pdf
2127-DELNP-2004-Correspondence-Others-(02-03-2009).pdf
2127-DELNP-2004-Correspondence-Others-(04-02-2009).pdf
2127-DELNP-2004-Correspondence-Others-(09-02-2009).pdf
2127-DELNP-2004-Correspondence-Others-(24-02-2009).pdf
2127-delnp-2004-correspondence-others.pdf
2127-DELNP-2004-Description (Complete)-(04-02-2009).pdf
2127-delnp-2004-description (complete).pdf
2127-DELNP-2004-Form-1-(04-02-2009).pdf
2127-delnp-2004-form-13-(09-02-2009).pdf
2127-DELNP-2004-Form-2-(04-02-2009).pdf
2127-DELNP-2004-Form-2-(24-02-2009).pdf
2127-DELNP-2004-Form-3-(04-02-2009).pdf
2127-DELNP-2004-GPA-(04-02-2009).pdf
2127-DELNP-2004-Petition-137-(04-02-2009).pdf
2127-DELNP-2004-Petition-138-(04-02-2009).pdf
| Patent Number | 231608 | ||||||||
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| Indian Patent Application Number | 2127/DELNP/2004 | ||||||||
| PG Journal Number | 13/2009 | ||||||||
| Publication Date | 27-Mar-2009 | ||||||||
| Grant Date | 06-Mar-2009 | ||||||||
| Date of Filing | 22-Jul-2004 | ||||||||
| Name of Patentee | PPG INDUSTRIES OHIO, INC., | ||||||||
| Applicant Address | 3800 WEST 143rd STREET, CLEVELAND, OHIO 44111, U.S.A. | ||||||||
Inventors:
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| PCT International Classification Number | C08L 83/10 | ||||||||
| PCT International Application Number | PCT/US03/02786 | ||||||||
| PCT International Filing date | 2003-01-29 | ||||||||
PCT Conventions:
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