Polyamide and acrylic polymer coated glass fiber 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 a sized glass fiber strand adapted to reinforce a polymeric matrix material. The sizing composition includes a polyamide which is the reaction product of a polycarboxylic acid and a polyoxyalkylene amine; an acrylic polymer which is essentially free of epoxy functionality; a coupling agent and a fiber lubricant which is different from the polyamide, the sizing composition being essentially free of a urethane-containing polymer. Composites reinforced with the sized glass fiber strand and a method of reinforcing a composite are also provided.
Claims17
A glass fiber strand adapted to reinforce a polymeric matrix material, the strand having thereon a sizing composition comprising:
- (a) a polyamide which is the reaction product of (1) a polycarboxylic acid and (2) a polyoxyalkylene amine;
- (b) an acrylic polymer which is essentially free of epoxy functionality;
- (c) a coupling agent selected from the group consisting of organo silane coupling agents, transition metal coupling agents, amino-containing Werner coupling agents and mixtures thereof;
- and
- (d) a fiber lubricant which is different from the polyamide of (a), the sizing composition being essentially free of a urethane-containing polymer.
Dependencies are inferred from the claim text.