Sizing glass fibers for thermoplastic resin reinforcementt

C - Chemistry – Metallurgy – 08 – L

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117/195, 400/411

C08L 101/00 (2006.01) C03C 25/26 (2006.01) C03C 25/32 (2006.01) C08J 5/08 (2006.01) C08K 7/14 (2006.01) C08K 9/04 (2006.01)

Patent

CA 1089138

Abstract Glass fibers for reinforcing thermoplastic resins are sized with an aqueous dispersion comprising a poly- urethane-ionomer as a film-forming agent and a bonding agent comprising an expoxy-containing alkoxysilane. Advantageously the polyurethane is a very small particle ionomer and the bonding agent is selected from the group consisting of (a) an epoxyalkyl alkoxysilane + an aminoalkyl alkoxysilane, (b) an epoxyalkyl alkoxysilane + a low-molecular weight aliphatic primary or secondary mono-amine, (c) an aminoalkyl alkoxysilane + a low-molecular weight monoepoxide, and (d) an epoxyalkyl alkoxysilane. - 1 -

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