Silicone coating composition containing surface sheen modifier
AssigneeMomentive Performance Materials Inc.
InventorGary Morgan Lucas
Life of this patent
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Abstract
There is provided herein an opaque one-part room temperature vulcanizing silicone polymer composition comprising: (a) a silanol-terminated diorganopolysiloxane, (b) an opaque reinforcing filler; (c) a polyalkoxysilane crosslinking agent; (d) a condensation cure catalyst; (e) an organo-functional alkoxy silane adhesion promoter; and, (f) a cyclic siloxane. There is also provided a method for the continuous production of such a silicone polymer composition, and a paint containing such a silicone polymer composition.
Claims19
A paint selected from the group consisting of an acrylic paint, an acryl-silicone paint, a polyester paint, a urethane paint, a fluoride paint, a vinyl chloride paint, a latex paint, an acrylic-latex paint, and an alkyl paint, comprising an opaque one-part room temperature vulcanizing silicone polymer composition consisting essentially of:
- (a) a silanol-terminated diorganopolysiloxane of the general formula (1):
- wherein R1 and R2 are independently monovalent hydrocarbon radicals containing up to about 12 carbon atoms, and the subscript n is of such a value that the viscosity of the silanol-terminated diorganopolysiloxane is from 50 to 1,000,000 cps;
- (b) an opaque reinforcing filler which is selected from the group consisting of untreated or stearic acid-treated ground, precipitated or colloidal calcium carbonates, alumina, aluminum hydroxide, titanium hydroxide, clays, diatomaceous earth, iron oxide, carbon black, graphite and combinations thereof;
- (c) a polyalkoxysilane crosslinking agent of the general formula (2):
- (R1O)4-a(R2)aSi (2)
- wherein R1 and R2 are as defined and the subscript a is 0 or 1;
- (d) a condensation cure catalyst;
- (e) an organo-functional alkoxy silane adhesion promoter of the general formula (6)
- (R10O)3-a(R11)aSiX (6)
- wherein R10 and R11 are independently monovalent hydrocarbon radicals containing up to about 12 carbon atoms, and subscript a is as defined, and X is an organo group of up to 12 carbon atoms;
- and,
- (f) a cyclic siloxane of the general formula (7):
- wherein R12 and R13 are independently linear or branched alkyl radicals of from 1 to 4 carbon atoms, and the subscript x is from about 3 to about 10;
- and, wherein the composition is in the absence of silica-based matting agents, and wherein the silicone polymer composition is present in an amount of from about 1 to about 50 weight percent of the paint composition.
Dependencies are inferred from the claim text.