Perfluoroelastomer compositions for low temperature applications
First Claim
1. A perfluoroelastomer composition comprising A) a perfluoroelastomer comprising copolymerized units of i) 40 to 55 mole percent perfluoro(alkyl vinyl ether), ii) 0.1 to 3 mole percent of a cure site monomer and the remaining copolymerized units being of iii) tetrafluoroethylene so that total mole percent is 100;
- and B) 25 to 50 phr of a perfluoropolyether.
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Accused Products
Abstract
Perfluoroelastomers that contain high levels (i.e. about 40 mole percent or more) of perfluoro(alkyl vinyl ether) copolymerized units can form stable blends with higher levels of perfluoropolyethers than can perfluoroelastomers that contain lower levels of perfluoro(alkyl vinyl ether) units. Thus, the former blends have better low temperature properties than the latter.
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Citations
8 Claims
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1. A perfluoroelastomer composition comprising
A) a perfluoroelastomer comprising copolymerized units of i) 40 to 55 mole percent perfluoro(alkyl vinyl ether), ii) 0.1 to 3 mole percent of a cure site monomer and the remaining copolymerized units being of iii) tetrafluoroethylene so that total mole percent is 100; - and
B) 25 to 50 phr of a perfluoropolyether. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification