Fluorine-containing copolymer and composition containing the same
AssigneeDaikin Kogyo Co., Ltd.
InventorsAkira Ohmor, Hiroshi Inukai
Life of this patent
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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.
Claims5
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 [.eta.] of said fluorine-containing copolymer is 0.15-1.50 measured in N-dimethylacetoamide at 35.degree. C., and the glass transition temperature of said copolymer is in the range -40.degree. C. to 120.degree. C.
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 [.eta.] of said fluorine-containing copolymer is 0.15-1.50 measured in N-dimethylacetoamide at 35.degree. C., and the glass transition temperature of said copolymer is in the range -40.degree. C. to 120.degree. C.;
- and said curing agent being a compound having at least two groups capable of reacting with the hydroxyl group in the copolymer.
Dependencies are inferred from the claim text.