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US4544720A
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Fluorine-containing copolymer
Assignee: Daikin Industries Ltd
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Filing: 1984-09-21
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Granted: 1985-10-01
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Expires: 2004-09-21
Abstract
Abstract A novel fluorine-containing copolymer having functional groups comprising structural units of 1,1-difluoroethylene and structural units of a monomeric compound of the formula: <IMAGE> wherein X is -OH, <IMAGE> or -COOH group, m is 0 or an integer of 1 to 10 and n is an integer of 1 to 4, which may futher contain structural units of at least one monomer selected from the group consisting of tetrafluoroethylene, chlorotrifluoroethylene, monofluoroethylene 1,1,2-trifluoroethylene, hexafluoropropene and a fluoroalkyl vinyl ether. The copolymer is curable at room temperature, and is useful as a material for fluorine-containing rubbers, molded articles and paints.
Inventors
- 👤 Akira Ohmori
- 👤 Nobuyuki Tomihashi
- 👤 Hiroshi Inukai
- 👤 Yoshiki Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:06
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/22; C07; C07C; C07C17/00; C07C17/26; C07C17/272; C07C17/275; C07C31/00; C07C31/34; C07C33/00; C07C33/40; C07C33/42; C07C33/423; C07C57/00; C07C57/52; C07C57/64; C07C57/66; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/16; C08L33/00; C08L33/04; C08L33/06; C08L33/14
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
73 words
A fluorine-containing copolymer comprising (a) 50-99 mole % of structural units of the formula: --CH.sub.2 --CF.sub.2 -- and (b) 1-50 mole % of structural units of the formula: ##STR14## wherein X is --OH, or ##STR15## m is 0 or an integer of 1 to 10 and n is an integer of 1 to 4, said copolymer having a molecular weight of 10,000-500,000 and a glass transition temperature of -40° C. to 70° C.
Claim 2
Dependent Claim
73 words
A fluorine-containing copolymer comprising (a) 50-99 mole % of structural units of the formula: --CH.sub.2 --CF.sub.2 -- and (b) 1-50 mole % of structural units of the formula: ##STR14## wherein X is --OH, or ##STR15## m is 0 or an integer of 1 to 10 and n is an integer of 1 to 4, said copolymer having a molecular weight of 10,000-500,000 and a glass transition temperature of -40° C. to 70° C.
Claim 3
Dependent Claim
54 words
The copolymer of claim 1, further comprising 0.1-30 mole % of at least one structural unit selected from the group consisting of --CF 2 --CF 2 --, --CClF--CF 2 --, --CH 2 --CHF--, --CHF--CF 2 --, --CF 2 --CF(CF 3 )-- and --CF 2 --CF(OR f )-- wherein R f is a fluoroalkyl group.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-30 | 1989-04-01 | 1989-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-30 | 1993-04-01 | 1993-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-30 | 1997-04-01 | 1997-10-01 | $7700.00 | Window Closed / Lapsed |