EP0077998A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Fluorine-containing elastomeric copolymers, and their production
Assignee: Daikin Industries Ltd
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Filing: 1982-10-19
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Granted: —
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Expires: 2002-10-19
Abstract
Abstract A fluorine-containing elastomeric copolymer which comprises units of at least one of fluorovinyl ethers of the formula: wherein X is C 1 -C 3 perfluoroalkyl, C 1 -C 3 ω-hydroperfluoroalkyl or C 1 -C 3 ω-chloroperfluoroalkyl, Y is hydrogen, chlorine, fluorine, trifluoromethyl, difluoromethyl or chlorodifluoromethyl and n is an integer of 1 to 4 and units of at least one of other fluorine-containing monomers copolymerizable therewith, the content of the fluorovinyl ether units being 15 to 50 mol%, and has an excellent resistance to low temperatures.
Inventors
- 👤 Masayoshi Tatemoto
- 👤 Toshihiko Amano
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 05:45
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/26
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
79 words
A fluorine-containing elastomeric copolymer which comprises units of at least one of fluorovinyl ethers of the formula: wherein X is C 1 -C 3 perfluoroalkyl, C l -C 3 ω-hydroperfluoroalkyl or C 1 -C 3 w-chloroperfluoroalkyl, Y is hydrogen, chlorine, fluorine, trifluoromethyl, difluoromethyl or - chlorodifluoromethyl and n is an integer of 1 to 4 and units of at least one of other fluorine-containing monomers copolymerizable therewith, the content of the fluorovinyl ether units being 15 to 50 mol%.
Claim 2
Dependent Claim
79 words
A fluorine-containing elastomeric copolymer which comprises units of at least one of fluorovinyl ethers of the formula: wherein X is C 1 -C 3 perfluoroalkyl, C l -C 3 ω-hydroperfluoroalkyl or C 1 -C 3 w-chloroperfluoroalkyl, Y is hydrogen, chlorine, fluorine, trifluoromethyl, difluoromethyl or - chlorodifluoromethyl and n is an integer of 1 to 4 and units of at least one of other fluorine-containing monomers copolymerizable therewith, the content of the fluorovinyl ether units being 15 to 50 mol%.
Claim 3
Dependent Claim
22 words
The copolymer according to claim 1, wherein the other fluorine-containing monomer(s) are chosen from tetrafluoroethylene, trifluoroethylene, chlorotrifluoroethylene, vinylidene fluoride and vinyl fluoride.
Claim 4
Dependent Claim
87 words
A process for preparing a fluorine-containing elastomeric copolymer which comprises polymerizing at least one of fluorovinyl ethers of the formula: wherein X is C 1 -C 3 perfluoroalkyl, C 1 -C 3 ω-hydroperfluoroalkyl or C 1 -C 3 ω-chloroperfluoroalkyl, Y is hydrogen, chlorine, fluorine, trifluoromethyl, difluoromethyl or chlorodifluoromethyl and n is an integer of 1 to 4 with at least one of other fluorine-containing monomers copolymerizable therewith to obtain a copolymer having units of the fluorovinyl ether in a content of 15 to 50 mol% is produced.
Claim 5
Dependent Claim
87 words
A process for preparing a fluorine-containing elastomeric copolymer which comprises polymerizing at least one of fluorovinyl ethers of the formula: wherein X is C 1 -C 3 perfluoroalkyl, C 1 -C 3 ω-hydroperfluoroalkyl or C 1 -C 3 ω-chloroperfluoroalkyl, Y is hydrogen, chlorine, fluorine, trifluoromethyl, difluoromethyl or chlorodifluoromethyl and n is an integer of 1 to 4 with at least one of other fluorine-containing monomers copolymerizable therewith to obtain a copolymer having units of the fluorovinyl ether in a content of 15 to 50 mol% is produced.
Claim 6
Dependent Claim
19 words
The process according to claim 3, wherein the polymerization is effected in the presence of a polymerization initiating source.
References Cited (Backward Citations)
No citation records indexed.
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