EP0075312A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Fluorine-containing copolymers
Assignee: Daikin Industries Ltd
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Filing: 1982-09-20
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Granted: —
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Expires: 2002-09-20
Abstract
Abstract A fluorine-containing copolymer comprising monomeric units of (a) from 95.8 to 80% by weight of tetrafluoroethylene, (b) from 4 to 14% by weight of hexafluoropropene, and (c) from 0.2 to 6% by weight of perfluorovinyl ether of the formula: wherein n is an integer of 1 to 4, and m is an integer of 0 to 3, and having excellent stress crack resistance.
Inventors
- 👤 Tsuneo Nakagawa
- 👤 Sadatsu Yamaguchi
- 👤 Toshihiko Amano
- 👤 Kohzoh Asano
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 20:42
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/26; C08F214/262
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
60 words
A fluorine-containing copolymer comprising monomeric units of (a) from 95.8 to 80 % by weight of tetrafluoroethylene, (b) from 4 to 14 % by weight of hexafluoropropene, and (c) from 0.2 to 6 % by weight of perfluorovinyl ether of the formula: wherein n is an integer of 1 to 4, and m is an integer of 0 to 3.
Claim 2
Dependent Claim
60 words
A fluorine-containing copolymer comprising monomeric units of (a) from 95.8 to 80 % by weight of tetrafluoroethylene, (b) from 4 to 14 % by weight of hexafluoropropene, and (c) from 0.2 to 6 % by weight of perfluorovinyl ether of the formula: wherein n is an integer of 1 to 4, and m is an integer of 0 to 3.
Claim 3
Dependent Claim
42 words
The fluorine-containing copolymer according to claim 1 comprising monomeric units of from 94.5 to 83 % by weight of tetrafluoroethylene, from 5 to 13 % by weight of hexafluoropropene and from 0.5 to 4 % by weight of the perfluorovinyl ether (I).
Claim 4
Dependent Claim
17 words
The fluorine-containing copolymer according to claim 1, wherein n in the formula (I) is 1 or 2.
References Cited (Backward Citations)
No citation records indexed.
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