Owens-corning Fiberglas Corporation

Thomas A Coakley

Robert A Schweizer

David W Garrett

Denny E Black

Carl E Forman

John E Rubadue

A method for improving the adhesiveness between a polyolefin resin and a sized glass fiber which comprises forming a mixture of the resin, a fiber and an organic acid and molding the mixture.

Resin modification for glass fiber adherence

A non-discoloring glass strand size comprises a thermoplastic polyurethane emulsion produced by the chain extension of an NCO-terminated prepolymer, which prepolymer is prepared by the reaction of an aliphatic or cycloaliphatic diisocyanate with a polyalkylene ether polyol and is particularly suitable for glass incorporated in polyamide resins.

Non-discoloring glass strand size

Glass fibers are coated with a mixture of an organo silane coupling agent, an oxidized polyolefin, and a carboxylated high molecular weight elastomer having a solubility parameter similar to that of polyolefin. In the preferred arrangement the coupling agent, polyolefin, and high molecular weight elastomer are in the form of an aqueous emulsion which is applied to the fibers as a coating at forming, and then dried. The silane coupling agent may be applied either as an initial coating or in mixture with the emulsions, and the coated fibers when dried are particularly adapted for the production of composites having a polyolefin matrix and a reinforcement of the coated glass fibers.

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Heath, OH, United States of America

Thomas A Coakley