Mold release composition with polybutadiene and method of coating a mold core

Claim 1

An aqueous mold release composition for use in coating core surfaces in contact with rigid or flexible urethane foams, or urethanes, silicones, natural rubber, neoprene or other synthetic elastomers, the composition comprising by weight: 0.1 to 12% a silane selected from the group consisting of methyl trimethoxysilane, ethyl-triethoxysilane, fluoro-triethoxysilane, methyl triethoxysilane, vinyl triethoxysilane, vinyl trimethoxysilane, Gamma-ureidopropyltrialkoxysilane, where the alkoxy group has one to three carbon atoms, Gamma-glycidoxypropyltrimethoxysilane, octyltriethoxysilane, Gamma-amino propyltriethoxysilane, Gamma-isocyanatopropyltriethoxysilane, tetraethoxysilane, Gamma-methacryloxypropyl trimethoxysilane, Beta- (3, 4-epoxycyclohexyl) ethyltrimethoxy-silane, Gamma-mercaptopropyltrimethoxysilane, and vinyl-tris (2-methoxyethoxy) silane, 0 to 16% a methyl terminated polydimethylsiloxane emulsified polymer, 0 to 10% a non-ionic surfactant, 0to 8% a fluorinated alkyl ester surfactant, 0 to 2.5% an ethoxylated amine surfactant, 0 to 12.5% a silanol terminated polydimethylsiloxane having a weight average molecular weight of 400 to 310,000, 0.1 to 8% a lower alkyl alcohol wherein the alkyl has 1-3 carbon atoms, 0 to 2% a fungicide, 0 to 20% a metallic salt of an organic acid, 0.5 to 2% a weak acid to maintain the pH between 4.5-5.5, 0.1 to 15% hydroxyl terminated polybutadiene, and 40 to 97% water.

Claim 13

A method of forming a mold release surface on a mold core comprising cleaning the core surfaces, heating both sides of the core surfaces to about 320 degrees F. and spraying the mold core with an aqueous composition containing less than thirty percent by weight of a mixture of a silane selected from the group consisting of methyl triethoxysilane, methyl trimethoxysilane, vinyl triethoxysilane, vinyl trimethoxysilane, methyl triphenoxysilane, ethyl-triethoxysilane, fluoro-triethoxysilane, Gamma-ureidopropyltrialkoxysilane, where the alkoxy group has one to three carbon atoms, Gamma-glycidoxypropyltrimethoxysilane, octyltriethoxysilane, Gamma-amino propyltriethoxysilane, Gamma-isocyanatopropyltriethoxysilane, tetraethoxysilane, Gamma-methacryloxypropyl trimethoxysilane, Beta- (3, 4-epoxycyclohexyl) ethyltrimethoxy silane,Gamma-mercaptopropyltrimethoxysilane, and vinyl-tris (2-methoxyethoxy) silane, together with a methyl terminated polydimethylsiloxane emulsified polymer, a nonyl or octyl phenol surfactant, an ethoxylated amine surfactant, a fluorinated alkyl esters surfactant, about 2 to 8% by weight of a lower alkyl alcohol, having 1 to 3 carbon atoms, 0.1 to 12.5% by weight silanol terminated polydimethylsiloxane having a weight average molecular weight between 400 and 310,000, about 0.1 to 15% by weight of a hyroxyl terminated polybutadiene, an acid to lower the pH to 4.5 to 5.5 and the remainder water.

Claim 14

A method of forming a mold release surface on a mold core comprising cleaning the core surfaces, heating both sides of the core surfaces to about 320 degrees F. and spraying the mold core with an aqueous composition containing less than thirty percent by weight of a mixture of a silane selected from the group consisting of methyl triethoxysilane, methyl trimethoxysilane, vinyl triethoxysilane, vinyl trimethoxysilane, methyl triphenoxysilane, ethyl-triethoxysilane, fluoro-triethoxysilane, Gamma-ureidopropyltrialkoxysilane, where the alkoxy group has one to three carbon atoms, Gamma-glycidoxypropyltrimethoxysilane, octyltriethoxysilane, Gamma-amino propyltriethoxysilane, Gamma-isocyanatopropyltriethoxysilane, tetraethoxysilane, Gamma-methacryloxypropyl trimethoxysilane, Beta- (3, 4-epoxycyclohexyl) ethyltrimethoxy silane,Gamma-mercaptopropyltrimethoxysilane, and vinyl-tris (2-methoxyethoxy) silane, together with a methyl terminated polydimethylsiloxane emulsified polymer, a nonyl or octyl phenol surfactant, an ethoxylated amine surfactant, a fluorinated alkyl esters surfactant, about 2 to 8% by weight of a lower alkyl alcohol, having 1 to 3 carbon atoms, 0.1 to 12.5% by weight silanol terminated polydimethylsiloxane having a weight average molecular weight between 400 and 310,000, about 0.1 to 15% by weight of a hyroxyl terminated polybutadiene, an acid to lower the pH to 4.5 to 5.5 and the remainder water.