Secondary coating for fiber strands, coated strand reinforcements, reinforced polymeric composites and a method of reinforcing a polymeric material
AssigneePPG Industries Ohio, Inc.
InventorPhilip L. Schell
Life of this patent
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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.
Claims27
An aqueous coating composition adapted to coat a sized fiber strand, the aqueous 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 less than 3 weight percent of acrylic latex on a total solids basis.
An aqueous coating composition adapted to coat a sized fiber strand, the aqueous 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 aqueous coating composition being less than 3 weight percent of acrylic latex on a total solids basis.
A reinforced polymeric composite comprising:
- (a) a fiber strand reinforcing material, at least a portion of a surface of the fiber strand reinforcing material having applied thereto a primary coating of a sizing composition and thereupon an aqueous secondary coating composition, the aqueous secondary coating composition comprising:
- (1) a urethane-containing polymer;
- and
- (2) 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 less than 3 weight percent of acrylic latex on a total solids basis, the aqueous coating composition being different from the sizing composition;
- and
- (b) a polymeric matrix material.
A method for reinforcing a polymeric matrix material, the method comprising:
- (a) applying an aqueous secondary coating composition to at least a portion of a surface of a fiber strand reinforcing material having applied thereto a primary coating of a sizing composition, the aqueous secondary coating composition comprising:
- (1) a urethane-containing polymer;
- and
- (2) an acrylic acid polymer prepared by vinyl addition polymerization of a monomer component consisting of a monomer selected from the group consisting of acrylic acid, methacrylic acid and mixtures thereof, the aqueous coating composition being less than 3 weight percent of acrylic latex material on a total solids basis, the aqueous coating composition being different from the sizing composition;
- (b) at least partially drying the aqueous secondary coating composition to form a substantially uniform coating upon the portion of the fiber strand reinforcing material;
- (c) dispersing the fiber strand reinforcing material in the polymeric matrix material;
- and
- (d) at least partially curing the polymeric matrix material to provide a reinforced polymeric composite.
Dependencies are inferred from the claim text.