Secondary coating for fiber strands, coated strand reinforcements, reinforced polymeric composites and a method of reinforcing a polymeric material
AssigneePPG Industries, Inc.
InventorPhilip L. Schell
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Abstract
The present invention provides aqueous coating compositions adapted to coat a fiber strand having thereon a sizing composition. The aqueous coating compositions include a urethane-containing polymer and a polymer prepared by addition polymerization of a monomer selected from the group consisting of acrylic acid, methacrylic acid and a mixture thereof. Also provided by the present invention are sized fiber strands coated with the secondary coating composition and composites reinforced with the same.
Claims24
A fiber strand adapted to reinforce a polymeric matrix material, at least a portion of a surface of the fiber strand having applied thereto a primary coating of a sizing composition and thereupon an aqueous secondary coating composition, the aqueous secondary coating composition comprising:
- (a) a urethane-containing polymer;
- and
- (b) a polymer prepared by addition polymerization of a monomer selected from the group consisting of acrylic acid, methacrylic acid and a mixture thereof,
- the aqueous coating composition being free of acrylic latex, the aqueous coating composition being different from the sizing composition.
A fiber strand adapted to reinforce a polymeric matrix material, at least a portion of a surface of the fiber strand having applied thereto a primary coating of a sizing composition and thereupon an aqueous secondary coating composition, the aqueous secondary coating composition comprising:
- (a) a urethane-containing polymer;
- and
- (b) a polymer prepared by addition polymerization of (1) a monomer selected from the group consisting of acrylic acid, methacrylic acid and a mixture thereof;
- and (2) an addition polymerizable unsaturated carboxylic acid adapted to form a polymer with the monomer, the polymer having at least one acid functional carboxyl group and being neutralized with a base, the aqueous coating composition being essentially free of acrylic latex, the aqueous coating composition being different from the sizing composition.
Dependencies are inferred from the claim text.