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US 5,177,142 AGranted
Silicone release coating compositions
AssigneeGeneral Electric Company
InventorsJudith Stein, Kevin X. Lettko
Life of this patent
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Abstract
"Acrylic weld" of a silicone release composition comprising a polydiorganosiloxane containing unsaturated groups, a crosslinking agent containing Si--H groups and a hydrosilation catalyst is inhibited by incorporating therein at least one free radical inhibitor. The preferred inhibitors are alkoxyphenols, especially 4-methoxyphenol.
Claims15
A curable coating composition comprising:
- (A) an addition-curable diorganopolysiloxane having alkenyl functional groups in a proportion up to about 20% by weight and having a viscosity at 25.degree. C. in the range of about 50-100,000 centipoise,
- (B) a crosslinking amount of a siloxane crosslinking agent having a substantial proportion of Si--H groups and having a viscosity at 25.degree. C. up to about 1000 centipoise,
- (C) an amount effective to crosslink said diorganopolysiloxane of a hydrosilation catalyst, and
- (D) an amount of 4-methoxyphenol in combination with oxygen effective to inhibit bonding of said coating composition to an acrylic adhesive.
1 more element
Dependencies are inferred from the claim text.