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US 4,810,728 AGranted
High strength silicone foam, and methods for making
AssigneeGeneral Electric Company
InventorsDavid C. Gross, Connie L. Haig, Jonathan D. Rich
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Abstract
Silicone foams are provided which have increased tensile strength as the result of using an effective amount of a silicone polyimide block copolymer having chemically combined organovinylsiloxy units in the silicone block.
Claims13
A silicone foam composition comprising by weight
- (A) 100 parts of a vinyl-terminated polydiorganosiloxane fluid,
- (B) 1-70 parts of a silicone polyimide block copolymer having from 1 to 75% by weight of chemically combined organovinylsiloxy units based on the weight of the silicone polyimide,
- (C) 1 to 50 parts of a siloxane hydride,
- (D) 0.2 to 10 parts of a hydroxylated material selected from the class consisting of water, C.sub.(1-8) alkanols, silanols, and mixtures thereof in an amount to provide a mole ratio of from about 0.02 to about 15 moles of hydroxyl radicals per silicon bonded hydrogen of siloxanehydride of (C), and
- (E) from about 1 to about 250 parts per million of catalytic platinum metal.
2 more elements
Dependencies are inferred from the claim text.