Claims
- 1. In a process for obtaining a high adhesion between a metal surface and a fluoroelastomer by vulcanizing said fluoroelastomer on the metal surface coated with an adhesive, the improvement comprising using as the fluoroelastomer a copolymer containing from 35 to 80 mol % of vinylidene fluoride, from 15 to 35 mol % of hexafluoropropene, from 0 to 30 mol % of another comonomer selected from the class consisting of fluoro-olefins and perfluorovinyl ethers, and from 0.001 to 2 weight % of bromine, using as vulcanizing agent a dihydroxy compound and using as vulcanization accelerator a quaternary ammonium or phosphonium or aminophosphonium compound.
- 2. A process according to claim 1 in which the vulcanization accelerator is an aminophosphonium compound.
- 3. The process according to claim 1, wherein a curing system based on bisphenol AF as dihydroxy compound and diphenyl-benzyl-diethylamino-phosphonium chloride as accelerator is used.
- 4. The process according to claim 1, wherein the fluoro-olefins are selected from the class consisting of tetrafluoroethylene, chlorotrifluoroethylene, and vinyl fluoride.
- 5. The process according to claim 1, characterized in that the perfluorovinyl ethers are selected from the class consisting of perfluoromethylvinyl ether, perfluoroethylvinyl ether, and perfluoropropylvinyl ether.
- 6. The process according to claim 1, characterized in that the fluoroelastomer comprises a terpolymer containing from 35 to 80 mol % of vinylidene fluoride, from 15 to 35 mol % of perfluoropropene, and up to 30 mol % of tetrafluoroethylene.
- 7. The process according to claim 1, characterized in that the fluoroelastomer comprises a copolymer containing from 75 to 80 mol % of vinylidene fluoride and from 20 to 25 mol % of perfluoropropene.
- 8. The process according to claim 1, or 10, or 11, or 12, or 13, or 14, characterized in that the bromine content is within the range of from 0.01 to 1 wt %.
Priority Claims (1)
Number |
Date |
Country |
Kind |
21701 A/85 |
Jul 1985 |
ITX |
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Parent Case Info
This application is a continuation of application Ser. No. 282,969 filed Dec. 6, 1988, (now abandoned) which in turn is a continuation of application Ser. No. 173,039 filed Mar. 28, 1988, now abandoned, which in turn is a continuation of application Ser. No. 886,930, filed July 18, 1986, now abandoned.
US Referenced Citations (5)
Continuations (3)
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Number |
Date |
Country |
Parent |
282969 |
Dec 1988 |
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Parent |
173039 |
Mar 1988 |
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Parent |
886930 |
Jul 1986 |
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