US4954589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soluble and curable fluorine-containing copolymer suitable as paint vehicle
Assignee: Central Glass Co Ltd
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Filing: 1989-05-17
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Granted: 1990-09-04
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Expires: 2009-05-17
Abstract
Abstract The invention provides a novel copolymer comprising 25-75 mol % of a fluoroolefin such as CTFE, 10-70 mol % of a vinyl or isopropenyl ester of fatty acid, such as finyl acetate or isopropenyl acetate, 3-40 mol % of a hydroxyl-containing allyl ether such as ethylene glycol monoallyl ether, and 0.1-20 mol % of a carboxyl-containing monomer such as finylacetic acid. This copolymer possesses favorable properties characteristic of fluoroesins, is soluble in various organic solvents and is curable at normal temperature by a polyisocyanate. Since the copolymer has carboxyl group, not only inorganic pigments but also organic pigments exhibit very good dispersibility in a solution of this copolymer in an organic solvent. The copolymer can be prepared by a single-stage reaction using a radical polymerization initiator.
Inventors
- 👤 Kiyomi Sugawara
- 👤 Kentaro Tsutsumi
- 👤 Mikio Otani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:19
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/24; C08F214/245; C08F214/247; C08F214/186; C08F218/00; C08F218/02; C08F218/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
94 words
A copolymer comprising: 25 to 75 mol % of first repeating units which originate from a fluoroolefin; 10to 70 mol % of second repeating units which originate from a fatty acid ester selected from the group consisting of vinyl esters and isopropenyl esters; 3 to 40 mol % of third repeating units which originate from a hydroxyl-containing allyl ether; and 0.1 to 20 mol % of fourth repeating units which originate from a carboxyl-containing monomer, selected from the group consisting of acrylic acid, vinylacetic acid, allyloxyacetic acid, allylacetic acid, methacrylic acid and maleic anhydride.
Claim 2
Dependent Claim
94 words
A copolymer comprising: 25 to 75 mol % of first repeating units which originate from a fluoroolefin; 10to 70 mol % of second repeating units which originate from a fatty acid ester selected from the group consisting of vinyl esters and isopropenyl esters; 3 to 40 mol % of third repeating units which originate from a hydroxyl-containing allyl ether; and 0.1 to 20 mol % of fourth repeating units which originate from a carboxyl-containing monomer, selected from the group consisting of acrylic acid, vinylacetic acid, allyloxyacetic acid, allylacetic acid, methacrylic acid and maleic anhydride.
Claim 3
Dependent Claim
39 words
A copolymer according to claim 1, further comprising not more than 10 mol % of fifth repeating units which originate from at least one fifth monomer selected from the group consisting of acrylates, methacrylates, acrylic amides and vinyl ethers.
Claim 4
Dependent Claim
21 words
A copolymer according to claim 2, wherein the amount of said fifth repeating units is not more than 8 mol %.
Claim 5
Dependent Claim
31 words
A copolymer according to claim 1, wherein said first, second, third and fourth repeating units amount to 40-60 mol %, 20-50 mol %, 5-30 mol % and 0.3-10 mol %, respectively.
Claim 6
Dependent Claim
25 words
A copolymer according to claim 1, wherein said fluoroolefin is selected from the group consisting of chlorotrifluoroethylene, trifluoroethylene, tetrafluoroethylene, hexafluoropropene, vinyl fluoride and vinylidene fluoride.
Claim 7
Dependent Claim
30 words
A copolymer according to claim 1, wherein said fatty acid ester is a vinyl ester of a fatty acid with an alkyl group having not more than 10 carbon atoms.
Claim 8
Dependent Claim
23 words
A copolymer according to claim 1, wherein said fatty acid ester is selected from the group consisting of isopropenyl acetate and isopropenyl propionate.
Claim 9
Dependent Claim
33 words
A copolymer according to claim 1, wherein said hydroxyl-containing allyl ether is selected from the group consisting of ethylene glycol monoallyl ether, diethylene glycol monoallyl ether, triethylene glycol monoallyl ether and hydroxypropylallyl ether.
Claim 10
Dependent Claim
41 words
A copolymer according to claim 1, wherein the proportions of said first, second, third and fourth repeating units are such that the intrinsic viscosity of the copolymer in tetrahydrofuran is in the range from 0.05 to 2.0 dl/g at 30° C.
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) | 1993-09-03 | 1994-03-05 | 1994-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-03 | 1998-03-05 | 1998-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-03 | 2002-03-05 | 2002-09-04 | $7700.00 | Window Closed / Lapsed |