TH59593A - Elastomer-modified epoxy xeloxane mixture - Google Patents

Abstract

DC60 (31/04/46) The elastomer-modified epoxy xeloxane mixture described in this invention was prepared by combining a silicone intermediate with an epoxy resin, an elastomer resin intermediate, a polyfunctional amine, an organometallic catalyst of choice, and an optional filler, pigment, and process agent. The mixture was prepared using sufficient water to induce hydrolysis of the polyxeloxane and polycondensation of the silanol prepared by such hydrolysis. In its cured form, the epoxy-xeloxane mixture is dispersed throughout as linear epoxy chains crosslinked to the polyxeloxane polymer chains, where either the epoxy and/or the polyxeloxane polymer are present. Alternatively, both may be elastomer-modified compounds to provide coatings and surfaces with improved properties in terms of impact strength, elasticity, crack resistance, and abrasion resistance compared to conventional epoxy systems. The elastomer-modified epoxy xeloxane compound described in this invention is prepared by combining a silicone intermediate with an epoxy resin, an elastomer resin intermediate, a polyfunctional amine, a select organometallic catalyst and select fillers, pigments, and process agents. The compound is prepared using sufficient water to induce hydrolysis of the polyxeloxane and polycondensation of the silanol prepared by such hydrolysis. In its cured form, the epoxy-xeloxane compound is dispersed throughout as a linear chain of epoxy. At the crosslinked point of the polyxeloxane polymer chain, where epoxy and/or polyxeloxane polymer, or both, are elastomer modifiers, a coating and surface treatment is applied with improved properties in terms of impact resistance, elasticity, crack resistance, and abrasion resistance compared to traditional epoxy systems.

Claims (17)

1. Elastomer-modified epoxy xeloxane mixtures prepared by: water mixing; a silicone intermediate formulated (chemical formula) where R1 is selected from groups containing hydroxyl, aryl, and alkoxy groups with up to six carbon atoms, and each R2 is selected from groups containing hydrogen, alkyl, and aryl groups with up to six carbon atoms, where n is chosen so that the weight-average molecular weight of the polyxeloxane ranges from approximately 400 to 10,000; polyfunctional amine curative agent; epoxy resin containing at least two 1,2-epoxide groups; and elastomer resin intermediates with functionality selected from groups containing hydroxyl, epoxy isocyanate, carboxyl, mercaptan, and amine groups. 2. An elastomer-modified epoxy xeloxane mixture as defined in Reputation 1, where the polyfunctional amine curative is an aminosilane of the general formula Y - Si - (O-X)3, where Y is H (HNR)a and where "a" is an integer from 1 to 6, R is a difunctional organic radical of choice independent of aryl, alkyl, dialkylaryl, alkoxyalkyl and cycloalkyl radicals, and where X is restricted to alkyl, hydroxylalkyl, alkoxyalkyl or hydroxylalkyl groups with fewer than six carbon atoms. 3. An elastomer-modified epoxy xeloxane mixture as specified in Claim 1, which shall be supplemented with at least one metal catalyst to aid in ambient temperature maturation, where the catalyst shall be selected from groups of zinc, manganese, zirconium, titanium, cobalt, ion, lead, and tin, each in the form of octonate, neodecanoate, or naphthanate. 4. Elastomer-modified epoxy xeloxane mixtures as specified in Claim 1, where an intermediate of elastomer resin type is selected from groups consisting of epoxy resin, polybutene resin, polybutadiene resin, acrylonitrile resin, polysulfide resin and such mixtures. 5. Elastomer-modified epoxy xeloxane mixtures as specified in Claim 1, in which silicone intermediaries shall be selected from alkoxy and silanol-functional polyxeloxanes with viscosities ranging from approximately 3,000 to 15,000 centipoise (cP) at 20°C. 6. Elastomer-modified epoxy xeloxane mixtures as specified in Claim 1, whereby the epoxy resin mixture shall be selected from groups consisting of epichlorohydrin-bisphenol A epoxy resin, epichlorohydrin-bisphenol F epoxy resin, hydrogenated bisphenol A epichlorohydrin epoxy resin, glycidyl methacrylate resin, glycidyl ester, phenol novolac epoxy resin, resininol-modified epoxy resin and such mixtures. 7. Elastomer-modified epoxy xeloxane mixtures prepared by: mixing silicone intermediates selected from alkoxy and silanol-functional polyxeloxanes with a weight-average molecular weight ranging from approximately 400 to 10,000; aminosilane curative with the formula Y-Si-(O-X)3, where Y is H(HNR)a and "a" is an integer from 1 to 6, R is a difunctional organic radical selected independently of aryl, alkyl, dialkylaryl, alkoxyalkyl, and cycloalkyl radicals, and X is restricted to alkyl, hydroxyl, alkoxyalkyl, or hydroxylalkyl groups with fewer than six carbon atoms; Epoxy resins containing at least two 1,2-epoxide groups; and elastomer resin intermediates with selected functional properties from groups comprising hydroxyl, epoxy, isocyanate, carboxyl, mercaptan, and amine, and from groups comprising epoxy resin, polybutene resin, polybutadiene resin, acrylonitrile resin, polysulfide resin, and their mixtures. 8. Elastomer-modified epoxy xeloxane mixture as specified in Claim 7, whereby the silicone intermediate shall have the following formulation (chemical formula), whereby each R1 shall be chosen from groups composed of hydroxyl, alkyl, aryl and alkoxy groups with up to six carbon atoms, and each R2 shall be chosen from groups composed of hydrogen, alkyl and aryl groups with up to six carbon atoms, whereby n shall be chosen such that the weight-average molecular weight of the polyxeloxane shall be in the range of approximately 400 to 10,000. 9. Elastomer-modified epoxy resin mixtures as specified in Claim 7, whereby the epoxy resin mixture shall be selected from groups consisting of epichlorohydrin-bisphenol A epoxy resin, epichlorohydrin-biphenol F epoxy resin, hydrogenated biphenol A epichlorohydrin epoxy resin, glycidine methacrylate resin, glycidyl ester, phenol novalac epoxy resin, resorcinol-modified epoxy resin and such mixtures. 10. An elastomer-modified epoxy xeloxane mixture as specified in Claim 7, which is further composed of at least one metal catalyst that is cured at ambient temperature, where the catalyst is selective from groups of zinc, manganese, zirconium, titanium, cobalt, iron, lead, and tin, each in the form of octonate, neodecanoate, or naphthanate. 11. Elastomer-modified epoxy xeloxane mixtures as described in Claim 7, consisting of approximately 1 to 40 percent by weight of silicone intermediates, 1 to 15 percent by weight of polyfunctional amines, 5 to 60 percent by weight of epoxy resins, and 1 to 25 percent by weight of elastomer resin intermediates. 12. Elastomer-modified epoxy xeloxane compounds are prepared by mixing: water; a silicone intermediate with a specific formula (chemical formula) where each R1 is chosen from groups containing hydroxyl, alkyl, aryl, and alkoxy groups with up to six carbon atoms; each R2 is chosen from groups containing hydrogen and alkyl and aryl groups with up to six carbon atoms; and n is chosen so that the average molecular weight for polyxelox ranges from approximately 400 to 10,000; Aminosilane curative resins, with the general formula Y-Si-(O-X)3, where Y is (HNR)a, where "a" is an integer ranging from 1 to 6, R is a difunctional organic radical selected independently from groups consisting of aryl, alkyl, dialkylaryl, alkoxyalkyl, and cycloalkyl radicals, and X is restricted to alkyl, hydroxylalkyl, alkoxyalkyl, or hydroxylalkyl groups with fewer than six carbon atoms; epoxy resins with more than two 1,2-epoxide groups per molecule by weight, where the epoxide equivalent ranges from 100 to approximately 5,000; and elastomer resin intermediates with functionalities selected from groups. Composed of hydroxyl, epoxy, isocyanate, carboxyl, mercaptan, and amine, and selected from groups consisting of epoxy resin, polybutene resin, polybutadiene resin, acrylonitrile resin, and blends therein. 13. An elastomer-modified epoxy xeloxane mixture as specified in Claim 12, which is further composed of at least one metal catalyst selected to aid maturation at ambient temperature, where the catalyst is chosen from groups of zinc, manganese, zirconium, titanium, cobalt, ion, lead, and tin, each in the form of octonate, neodecanoate, or naptanate. 14. Elastomer-modified epoxy xeloxane mixtures as specified in Claim 12, whereby the epoxy resin mixture shall be selected from groups consisting of epichlorohydrin-bisphenol A epoxy resin, epichlorohydrin-bisphenol F epoxy resin, hydrogenated bisphenol A epichlorohydrin epoxy resin, glycidyl methacrylate resin, glycidyl ester, phenol novalac epoxy resin, resorcinol-modified epoxy resin and such mixtures. 15. Elastomer-modified epoxy xeloxane mixtures as described in Claim 12, consisting of silicone intermediates ranging from approximately 1 to 40 percent by weight, polyfunctional amines 1 to 15 percent by weight, epoxy resins 5 to 60 percent by weight, and elastomer resin type anintermediates 1 to 25 percent by weight. 16. Method for fabricating cured thermosetting elastomer-modified epoxy xeloxane composites consisting of the following steps: Resin fraction formation by mixing; alkoxy or silanol-functional polyxeloxane; with epoxy resin; and an elastomer resin intermediate with selected functionalities from groups containing hydroxyl, epoxy, isocyanate, carboxyl, mercaptan, and amine, and from groups containing epoxy resin, polybutene resin, polybutadiene resin, and the resulting mixture. Resin curing in water at ambient temperature by adding: a polyfunctional amine mixture; and an organotin catalyst. 17. Method for creating cured elastomer-modified epoxy xeloxane composites consisting of the following steps: Resin creation by mixing: polyxeloxane with a chemical formula where each R1 is selected from groups containing hydroxyl, aryl, and alkoxy groups with up to six carbon atoms, and each R2 is selected from groups containing hydrogen, alkyl, and aryl groups with up to six carbon atoms, where n is chosen based on the weight-average molecular weight of the polyxeloxane ranging from approximately 400 to 10,000; and epoxy resin containing more than one 1,2-epoxide group per molecule and an epoxide equivalent weight ranging from 100 to approximately 5,000; and an elastomer resin intermediate with selected functional groups. Composed of hydroxyl, epoxy, isocyanate, carboxyl, mercaptan, and amine, and selected from groups consisting of epoxy resin, polybutene resin, polybutadidine resin, and composites therein; and curing of the resin in water at ambient temperature by adding; organotin catalyst; and aminosilane curative agent.