US4667000A
Expired / Lapsed
US
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Fluorine-containing copolymer and composition containing the same
Assignee: Daikin Industries Ltd
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Filing: 1986-01-27
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Granted: 1987-05-19
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Expires: 2006-01-27
Abstract
Abstract A fluorine-containing copolymer comprising structural units of the formula (a): --CH.sub.2 CF.sub.2 -- (a) structural units of the formula (b): ##STR1## wherein n is an integer of 1 to 10 and structural units of the formula (c): --CFX--CFY-- (c) wherein X is --H, --Cl or --F and Y is --F, a lower fluoroalkyl group or a group having the formula: ##STR2## in which m is 0 or an integer of 1 to 3 and a curable composition comprising the fluorine-containing copolymer and a curing agent. The fluorine-containing copolymer is compatible with acrylic resins and is excellent in transparency, and the composition can be employed as a room temperature curing paints material.
Inventors
- 👤 Akira Ohmor
- 👤 Hiroshi Inukai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:36
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/22; C08F214/225; C08F214/227; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/16; C08L33/00; C08L33/04; C08L33/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
120 words
A fluorine-containing copolymer comprising 50-99 mole % of structural units of the formula (a): --CH.sub.2 CF.sub.2 -- (a) 0.1-30 mole % of hydroxyl-containing structural units of the formula (b): ##STR10## wherein n is an integer of 1 to 10 and 1-50 mole % of structural units of the formula (c): --CFX--CFY-- (c) wherein X is --H, --Cl or --F and Y is --F, a lower fluoroalkyl group or a group having the formula: ##STR11## in which m is 0 or an integer of 1 to 3, wherein the intrinsic viscosity [η] of said fluorine-containing copolymer is 0.15-1.50 measured in N-dimethylacetoamide at 35° C., and the glass transition temperature of said copolymer is in the range -40° C. to 120° C.
Claim 2
Dependent Claim
120 words
A fluorine-containing copolymer comprising 50-99 mole % of structural units of the formula (a): --CH.sub.2 CF.sub.2 -- (a) 0.1-30 mole % of hydroxyl-containing structural units of the formula (b): ##STR10## wherein n is an integer of 1 to 10 and 1-50 mole % of structural units of the formula (c): --CFX--CFY-- (c) wherein X is --H, --Cl or --F and Y is --F, a lower fluoroalkyl group or a group having the formula: ##STR11## in which m is 0 or an integer of 1 to 3, wherein the intrinsic viscosity [η] of said fluorine-containing copolymer is 0.15-1.50 measured in N-dimethylacetoamide at 35° C., and the glass transition temperature of said copolymer is in the range -40° C. to 120° C.
Claim 3
Dependent Claim
49 words
The copolymer of claim 1, wherein said copolymer comprises 65 to 90% by mole of said structural units of the formula (a), 0.5 to 10% by mole of said structural units of the formula (b) and 10 to 30% by mole of said structural units of the formula (c).
Claim 4
Dependent Claim
153 words
A curable composition comprising a fluorine-containing copolymer and a curing agent; said fluorine-containing copolymer comprising 0.1-30 mole % of structural units of the formula (a): --CH.sub.2 CF.sub.2 -- (a) 0.1-30 mole % of hydroxyl-containing structural units of the formula (b): ##STR12## wherein n is an integer of 1 to 10 and 1-50 mole % of structural units of the formula (c): --CFX--CFY-- (c) wherein X is --H, --Cl or --F and Y is --F, a lower fluoroalkyl group or a group having the formula: ##STR13## in which m is 0 or an integer of 1 to 3, wherein the intrinsic viscosity [η] of said fluorine-containing copolymer is 0.15-1.50 measured in N-dimethylacetoamide at 35° C., and the glass transition temperature of said copolymer is in the range -40° C. to 120° C.; and said curing agent being a compound having at least two groups capable of reacting with the hydroxyl group in the copolymer.
Claim 5
Dependent Claim
153 words
A curable composition comprising a fluorine-containing copolymer and a curing agent; said fluorine-containing copolymer comprising 0.1-30 mole % of structural units of the formula (a): --CH.sub.2 CF.sub.2 -- (a) 0.1-30 mole % of hydroxyl-containing structural units of the formula (b): ##STR12## wherein n is an integer of 1 to 10 and 1-50 mole % of structural units of the formula (c): --CFX--CFY-- (c) wherein X is --H, --Cl or --F and Y is --F, a lower fluoroalkyl group or a group having the formula: ##STR13## in which m is 0 or an integer of 1 to 3, wherein the intrinsic viscosity [η] of said fluorine-containing copolymer is 0.15-1.50 measured in N-dimethylacetoamide at 35° C., and the glass transition temperature of said copolymer is in the range -40° C. to 120° C.; and said curing agent being a compound having at least two groups capable of reacting with the hydroxyl group in the copolymer.
Claim 6
Dependent Claim
27 words
The composition of claim 3, wherein said curing agent is present in an amount of 1 to 5 equivalents based on the hydroxyl group of the copolymer.
Claim 7
Dependent Claim
21 words
The composition of claim 3, which further contains 1 to 95 parts by weight of an alkyl acrylate or methacrylate polymer.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1990-05-18 | 1990-11-17 | 1991-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-18 | 1994-11-17 | 1995-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-18 | 1998-11-17 | 1999-05-19 | $7700.00 | Window Closed / Lapsed |