Ethylene/tetrafluoroethylene or chlorotrifluoroethylene copolymer
AssigneeDaikin Kogyo Co., Ltd.
InventorsShinichi Nakagawa, Kiyohiko Ihara, Toshio Sogabe
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Abstract
A copolymer comprising monomeric units derived from ethylene, tetrafluoroethylene or chlorotrifluoroethylene and a fluorovinyl compound of the formula: CH.sub.2 .dbd.CFRf (I) wherein Rf is a C.sub.2 -C.sub.10 fluoroalkyl group, a molar ratio of ethylene and tetrafluoroethylene or chlorotrifluoroethylene being from 40:60 to 60:40 and the content of the fluorovinyl compound being from 0.1% to 10% by mole having improved thermal resistance and high temperature mechanical properties such as crack resistance.
Claims16
A copolymer comprising monomeric units derived from ethylene, tetrafluoroethylene or chlorotrifluoroethylene and a fluorovinyl compound of the formula:
- CH.sub.2 .dbd.CFRf (I)
- wherein Rf is a C.sub.2 -C.sub.10 fluoroalkyl group, the molar ratio of ethylene and tetrafluoroethylene or chlorotrifluoroethylene being from 40:60 to 60:40 and the content of the fluorovinyl compound being from 0.1% to 10% by mole.
A copolymer comprising monomer units derived from ethylene, tetrafluoroethylene and a fluorovinyl compound of the formula:
- CH.sub.2 .dbd.CFRf
- wherein Rf is a C.sub.2 -C.sub.8 fluoroalkyl group selected from the group consisting of perfluoroalkyl, omega-hydroperfluoroalkyl, and omega-chloroperfluoroalkyl, the molar ratio of ethylene and tetrafluoroethylene being from 40:60 to 60:40 and the content of the fluorovinyl compound being from 0.1% to 10% by mole.
Dependencies are inferred from the claim text.