Glass fibers for reinforcing organic matrices
AssigneeVetrotex France
InventorsJean-Philippe Gasca, Gerard Tardy
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Abstract
Glass fibers are coated with a sizing composition comprising an aqueous emulsion based on at least one polyolefin having grafted thereon at least one acid or anhydride which is neutralized by at least one alcoholamine, at least one aminosilane coupling agent, and at least one primary, secondary or tertiary aliphatic monoamine stabilizing agent which is miscible with water and which has a pK.sub.b value lower than the pK.sub.b value of the amine group of the coupling agent, plus 1. The glass fibers of the invention are intended more particularly for reinforcing polyolefin matrices such as polypropylene matrices.
Claims15
Glass fibers for reinforcing thermoplastic materials, said fibers being coated with a sizing composition comprising:
- (1) an aqueous emulsion containing at least one polyolefin having grafted thereon at least one acid or anhydride which is neutralized by at least one alcoholamine, said at least one polyolefin being present in an amount of between 1 and 10% by weight of said composition;
- (2) 0.1-2% by weight of at least one aminosilane coupling agent;
- and
- (3) 0.1-2% by weight of at least one primary, secondary, or tertiary aliphatic monoamine stabilizing agent which is miscible with water and which has a pK.sub.b value lower than the pK.sub.b value of the amine group of the coupling agent, plus 1, wherein the solids content of the composition is between 1 and 15%.
Dependencies are inferred from the claim text.