US4877839A
Expired / Lapsed
US
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Fluorocopolymer compositions
Assignee: Imperial Chemical Industries Ltd
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Filing: 1988-06-08
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Granted: 1989-10-31
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Expires: 2008-06-08
Abstract
Abstract Composition, optionally curable, comprising a fluorocopolymer admixed with an acrylic polymer, where the fluoropolymer comprises units of a fluorolefine (e.g. TFE) and fluoroallylether (e.g. tetrafluororallylether).
Inventors
- 👤 John N. Conti-Ramsden
- 👤 Richard L. Powell
- 👤 Brian D. Young
- 👤 Jeffrey Farrar
- 👤 Debra K. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:02
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L33/00; C08L33/04; C08L33/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
87 words
Composition comprising at least one fluorocopolymer and at least one acrylic polymer, wherein said fluorocopolymer is a copolymer comprising polymerised units derived from: (A) at least one fluoroolefine of formulate CFX 1 ═CFX 2 where X 1 is selected from F and halogen other than F and X 2 is selected from F, H, halogen other than F, and perfluoroalykyl; and (B) at least one fluoroallylether of formula CH 2 CHCH 2 OR f where R f is a fluoroalkyl group having 2 to 10 carbon atoms.
Claim 2
Dependent Claim
87 words
Composition comprising at least one fluorocopolymer and at least one acrylic polymer, wherein said fluorocopolymer is a copolymer comprising polymerised units derived from: (A) at least one fluoroolefine of formulate CFX 1 ═CFX 2 where X 1 is selected from F and halogen other than F and X 2 is selected from F, H, halogen other than F, and perfluoroalykyl; and (B) at least one fluoroallylether of formula CH 2 CHCH 2 OR f where R f is a fluoroalkyl group having 2 to 10 carbon atoms.
Claim 3
Dependent Claim
35 words
Composition according to claim 1 wherein (A) is selected from one or more of CF 2 ═CF 2 (tetrafluoroethylene), CF 2 ═CFCl (chlorotrifluoroethylene), CF 2 ═CFCF 3 (hexafluoropropylene), CF 2 ═CFH (trifluoroethylene), and CFCl═CFCl (dichlorodifluoroethylene).
Claim 4
Dependent Claim
38 words
Composition according to either claim 1 wherein (B) is selected from CH 2 ═CHCH 2 OCF 2 CF 2 H (tetrafluoroallylether), CH 2 ═CHCH 2 OCF 2 CF(H)CF 3 , and CH 2 ═CHCH 2 OCF 2 CFClH.
Claim 5
Dependent Claim
31 words
Composition according to claim 1 wherein said acrylic polymer is selected from homo- and copolymers of alkyl acrylates and alkyl methacrylates having 1 to 20 carbon atoms in the alkyl group.
Claim 6
Dependent Claim
10 words
Composition according to claim 1 wherein said composition is curable.
Claim 7
Dependent Claim
33 words
Composition according to claim 5 wherein said at least one fluorocopolymer comprises polymerised units derived from (C), namely at least one olefinically unsaturated comonomer bearing at least one functional group for imparting curability.
Claim 8
Dependent Claim
27 words
Composition according to claim 1 wherein said fluorocopolymer comprises polymerised units derived from (D), namely at least one non-functional olefinically unsaturated monomer other than (A) or (B).
Claim 9
Dependent Claim
27 words
Composition according to claim 7 wherein (D) is selected from one or more of alkyl, aryl or cycloalkyl vinyl ethers (or fluoro-substituted derivatives thereof) and vinyl esters.
Claim 10
Dependent Claim
70 words
Composition according to claim 1 wherein said fluorocopolymer comprises 30 to 70 mole % of polymerised units derived from (A), 70 to 30 mole % of polymerised units derived from (B), 0 to 40 mole % of polymerised units derived from (C) where (C) is and 0 to 40 mole % of polymerised units derived from (D) where (D) is the total of all polymerised units being 100 mole %.
Claim 11
Dependent Claim
54 words
Composition according to claim 9 wherein said fluorocopolymer comprises 30 to 50 mole % of polymerised units derived from (A), 70 to 50 mole % of polymerised units derived from (B), 0 to 20 mole % of polymerised units derived from (C), and 0 to 20 mole % of polymerised units derived from (D).
Claim 12
Dependent Claim
33 words
Composition according to claim 1 wherein the ratio (by weight, dry) of the at least one fluorocopolymer to the at least one acrylic polymer is within the range of from 5/95 to 95/5.
Claim 13
Dependent Claim
14 words
Composition according to claim 5 to 11 wherein said composition contains a curing agent.
Claim 14
Dependent Claim
19 words
Composition according to claim 1 wherein said composition in the form of an organic solvent solution of the polymers.
Claim 15
Dependent Claim
30 words
Composition according to claim 1 wherein said composition is in the form of an aqueous emulsion or suspension of the polymers, or in the form of a dry powder blend.
References Cited (Backward Citations)
JPS5525417A
Cited
US4588781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-30 | 1993-05-01 | 1993-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-30 | 1997-05-01 | 1997-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-30 | 2001-05-01 | 2001-10-31 | $7700.00 | Window Closed / Lapsed |