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US 4,542,177 AGranted
Thermoplastic polyester molding composition having an improved impact performance
AssigneeMobay Chemical Corporation
InventorsGeorge R. Kriek, James Y. J. Chung, Gerard E. Reinert, Dieter Neuray
Life of this patent
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Abstract
The invention relates to a thermoplastic molding composition comprising a blend of a thermoplastic polyester and a reinforcing amount of a reinforcing agent. An improvement in the impact performance of the composition is disclosed to result upon the incorporation therewith of a blocked (end-capped) polyisocyanate prepolymer.
Claims11
A thermoplastic molding composition comprising a blend of
- (i) polyethylene terephthalate,
- (ii) a reinforcing amount of a reinforcing agent of said polyethylene terephthalate and
- (iii) about 0.5 to about 8.0 parts per hundred weight of said polyethylene terephthalate of an end-capped polyisocyanate prepolymer.
A thermoplastic molding composition comprising a blend of
- (i) polyethylene terephthalate resin,
- (ii) about 10 to about 50 percent relative to the weight of said blend, of reinforcing glass fibers and
- (iii) about 0.5 to about 8.0 parts per one hundred parts by weight of said resin, of a blocked polyisocyanate prepolymer which is the polyaddition reaction product of toluene diisocyanate and hydroxy polyether which product is blocked by .epsilon.-caprolactam.
A thermoplastic molding composition comprising the extruded blend of
- (i) polyethylene terephthalate,
- (ii) a reinforcing amount of a reinforcing agent of said polyethylene terephthalate and
- (iii) about 0.5 to about 8.0 parts per hundred weight of said polyethylene terephthalate of an end-capped polyisocyanate prepolymer.
Dependencies are inferred from the claim text.