Patent ID: 11952516
Assignee: MOMENTIVE PERFORMANCE MATERIALS INC.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A curable silicone composition comprising:
(a) an alkenyl functional silicone; (b) a silicone hydride cross linker; (c) a filler; (d) a first adhesion promoter; (e) a second adhesion promoter; (f) optionally, a silane; (g) optionally an inhibitor; and (h) optionally a catalyst;
wherein the first adhesion promoter is chosen from a compound of the formula Z1—R1—O—Ar—O—R2—Z2 where R1 and R2 are a C1-C30 divalent hydrocarbon; a C2-C20 divalent hydrocarbon; a C4-C10 divalent hydrocarbon; or a C1-C4 divalent hydrocarbon;, Z1 and Z2 are independently:, , provided that at least one of Z1 and Z2 is, , where R3, R4, R5, R6, R7, R8, R9, and R10 are independently chosen from H, a C1-C10 alkyl, or —OR11, where R11 is a C1-C10 alkyl, and at least one of R3, R4, R5, R6, R7, R8, R9, and/or R10 are H;, x is 1 to 10;, y is 2 to 10; and, Ar is an aromatic group;
wherein the second adhesion promoter is chosen from one or more compounds of the formula R47—SiR48r(OR49)3-r where R47 is a cyclic hydrido siloxane containing group of the formula:, R48 is independently selected from a C1-C10 hydrocarbon group; each R49 is independently selected from a C1-C10 hydrocarbon; r is 0, 1, or 2:
R51, R52, and R53 are independently chosen from H, a C1-C10 alkyl, or —OR54, where R54 is a C1-C10 alkyl, and at least one of R51, R52, and R53 are H; and R50 is an organosilicon group having a side chain bonded to a silicon atom and represented by the following formula

Q1-C(O)—O-Q2, wherein Q1 represents a linear or branched alkylene group that forms a carbon chain having two or more carbon atoms between a silicon atom in R47 and an ester bond, and Q2 represents a linear or branched alkylene group that forms a carbon chain having three or more carbon atoms between an oxygen atom and a silicon atom in SiR48r(OR49)3-r; and
wherein the first adhesion promoter and the second adhesion promoter are included in the curable silicone composition in different amounts by weight.