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US 5,854,310 AGranted
Curable fluorosilicone composition having improved lubricity
AssigneeDow Corning Corporation
InventorMyron T. Maxson
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Abstract
The present invention is a curable fluorosilicone composition having improved lubricity, low compression set, and good resistance to fluids such as automotive fuel without post-curing. The composition comprises (A) poly(trifluoropropyl)methylsiloxane, (B) vinylmethyldi(N-alkylacetamido)silane, (C) reinforcing treated silica, (D) chlorotrifluoroethylene polymer, and (E) vinyl specific organic peroxide catalyst.
Claims17
A curable fluorosilicone composition comprising
- (A) 100 weight parts of a poly(trifluoropropyl)methylsiloxane composition comprising
- (i) 80 to 95 percent of a hydroxyl en-terminated poly (trifluoropropyl)methylsiloxane having a Williams plasticity number within a range of about 100 mm to 400 mm and
- (ii) 5 to 20 weight parts of a hydroxyl end-terminated poly(trifluoropropyl)vinylmethylsiloxane having a Williams plasticity number within a range of about 100 mm to 400 mm and comprising about 0.1 to 2 mole percent vinylmethylsiloxy units,
- (B) 0.05 to 10 weight parts of vinylmethyldi(N-alkylacetamido)silane,
- (C) 5 to 50 weight parts of reinforcing treated silica,
- (D) 1 to 25 weight parts of chlorotrifluoroethylene polymer, and
- (E) vinyl specific organic catalyst in an amount sufficient to cure the composition, wherein the weight parts of components (B), (C), (D), and (E) are based on 100 weight parts of component (A).
4 more elements
Dependencies are inferred from the claim text.