Claims
- 1. In a fluororubber composition comprising (A) 100 weight parts of a curable fluororubber and (B) a quantity of a curing agent sufficient to cure the fluororubber,
- the improvement comprising the presence of
- (C) from 0.1 to 30 weight parts of a finely divided cured silicone material in the form of a rubber, gel or resin, where said silicone material exhibits an average particle diameter not exceeding 100 micrometers.
- 2. A composition according to claim 1 wherein the cured silicone material is an organopolysiloxane rubber that has been cured by an addition, free radical or condensation reaction and the concentration of said material is from 0.1 to 15 weight parts.
- 3. A composition according to claim 2 where said cured organosilicone material includes an additive to further improve the processability of said composition said additive being selected from the group consisting of epoxy group-containing organoalkoxysilanes, partial hydrolysis condensates thereof, fluoropropyl group-containing organoalkoxysilanes and partial hydrolysis condensates thereof.
- 4. A composition according to claim 2 where said composition further includes an additive to achieve cohesive bonding between said composition in the cured form and a metal or plastic substrate, said additive being selected from the group consisting of epoxy group containing alkoxysilanes and their partial hydrolysis products.
- 5. A composition according to claim 2 in which the cured silicone material is prepared by curing a fluorosilicone rubber composition comprising a fluoropropyl group-containing organopolysiloxane.
- 6. A composition according to claim 1 where said finely divided silicone material is prepared by blending a curable silicone rubber with water and a surfactant in a colloid mill or homogenizer to form an aqueous dispersion and then curing the resultant dispersion by blending it with water heated to a temperature of at least 50 degrees Centigrade.
- 7. A composition according to claim 1 where said fluororubber is a fluorosilicone rubber.
- 8. A composition according to claim 1 where said fluororubber is an organic fluororubber.
Priority Claims (1)
Number |
Date |
Country |
Kind |
63-260925 |
Oct 1988 |
JPX |
|
REFERENCE TO COPENDING APPLICATIONS
This application is a continuation-in-part of copending U.S. application Ser. No. 313,123 filed on Feb. 21, 1989 now abandoned.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
4010136 |
Blizzard et al. |
Mar 1977 |
|
4488771 |
Koford |
Dec 1984 |
|
4859740 |
Damrath et al. |
Aug 1989 |
|
4946883 |
Kunimatsu et al. |
Aug 1990 |
|
Foreign Referenced Citations (2)
Number |
Date |
Country |
60-105557 |
Jun 1985 |
JPX |
60-112431 |
Jun 1985 |
JPX |
Non-Patent Literature Citations (1)
Entry |
Abstract of J60105527, 1985, Japan. |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
313123 |
Feb 1989 |
|