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US 12,473,474 B2Granted
Addition curable silicone adhesive compositions
AssigneeMomentive Performance Materials Inc.
InventorsMandal Subrata, Koki Otashiro, Masanori Takanashi, Ramasubramanian Narayanan
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Abstract
A curable silicone adhesive composition comprising a combination of adhesion promoters is shown and described herein. The composition includes a first adhesion promoter selected from a silicon hydride adhesion promoter and a second adhesion promoter selected from an acrylate functional adhesion promoter to provide a silicone material that is curable at relatively low temperatures and shorter time and provides good adhesion to plastics and metal.
Claims28
A curable silicone composition comprising:
- (a) an alkenyl functional silicone;
- (b) a silicone based cross linker;
- (c) a first adhesion promoter selected from a silicon hydride containing adhesion promoter having at least one Si—H group;
- (d) a second adhesion promoter selected from an acrylate functional adhesion promoter;
- (e) optionally, a silane;
- (f) optionally, a filler;
- (g) an inhibitor;
- and (h) a catalyst, wherein the first adhesion promoter and the second adhesion promoter are present in an amount such that there is a molar ratio of Si—H to ethylenically-unsaturated groups from the first and second adhesion promoters of from 1.5:1 to 2.5:1.
5 more elements
A curable silicone composition comprising:
- (a) an alkenyl functional silicone;
- (b) a silicone based cross linker;
- (c) a first adhesion promoter selected from a silicon hydride containing adhesion promoter having at least one Si—H group;
- (d) a second adhesion promoter selected from an acrylate functional adhesion promoter;
- (e) optionally, a silane;
- (f) optionally, a filler;
- (g) an inhibitor;
- and (h) a catalyst;
- wherein the first adhesion promoter (c) comprises (i) an adhesion promoter of formula (I), and (ii) an adhesion promoter of formula (VI):
- Z1—R1—O—Ar—O—R2—Z2 (I)
- 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:
- 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;
- R23—SiR24r(OR25)3-r (VI)
- where R23 is a hydrogen or hydride functional group;
- R24 is independently selected from a C1-C10 hydrocarbon group;
- each R25 is independently selected from a C1-C10 hydrocarbon;
- and r=0, 1, or 2.
22 more elements
Dependencies are inferred from the claim text.