Claims
- 1. Fluoroelastomer compositions vulcanizable with peroxide and/or ionic vulcanization, comprising from 0.5 to 5 parts by weight, per 100 parts by weight of fluoroelastomer, of an ethylene homopolymer or of an ethylene/propylene or ethylene/butene-1 copolymer of the amorphous type and containing ester groups --COOR, R=an alkyl with 1 to 8 C, along the polymeric chain, in amounts equal to 0.5%-10% by weight referred to the olefin polymer, said ester groups being bound to carbon atoms of the polymer chain either directly or through a --CH.sub.2 -- radical or in the form ##STR3## where R is a C.sub.1 -C.sub.8 alkyl group.
- 2. Fluoroelastomer compositions according to claim 1, wherein the fluoroelastomer is selected from the class consisting of:
- (a) copolymers of CH.sub.2 .dbd.CF.sub.2 with perfluoropropene;
- (b) copolymers of CH.sub.2 .dbd.CF.sub.2 with CF.sub.2 .dbd.CFCl;
- (c) fluorosilicone rubbers containing cure site peroxides;
- (d) copolymers of CF.sub.2 .dbd.CF.sub.2 with perfluoroalkylvinylethers; and
- (e) copolymers of CF.sub.2 .dbd.CF.sub.2 with propylene.
- 3. Fluoroelastomer compositions according to claim 2, wherein under (a) there may also be present tetrafluoroethylene and co-monomers acting as a cure site for the peroxide vulcanization.
- 4. Fluoroelastomer compositions according to claim 1, wherein the fluoroelastomer is present in admixture with a lesser amount of ethylene/propylene elastomer copolymer, equal to 5-50 parts by weight per 100 parts by weight of fluoroelastomer.
- 5. Fluoroelastomer compositions according to claim 1, wherein the fluoroelastomer is of the type vulcanizable with peroxides.
Priority Claims (1)
Number |
Date |
Country |
Kind |
20956 A/87 |
Jun 1987 |
ITX |
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DESCRIPTION OF THE INVENTION
This application is a continuation of our prior copending application Ser. No. 205,175, filed June 10, 1988.
US Referenced Citations (3)
Continuations (1)
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Number |
Date |
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Parent |
205175 |
Jun 1988 |
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