Thermoplastic polyurethane blends containing a processing aid

Details Thermoplastic polyurethane blends containing a processing aid Thermoplastic polyurethane blends containing a processing aid

1978-04-20

1979-12-18

Lieberman, Paul

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525125, 525123, C08L 7500

Patent

active

041794796

ABSTRACT:
The instant invention is directed to novel thermoplastic polyurethane materials containing a processing aid. More particularly, the instant invention is directed to a thermoplastic polyurethane composition comprising: (A) from 40 to 100 percent by weight of a thermoplastic polyurethane, (B) from 0 to 60 percent by weight of a thermoplastic polymer selected from the group consisting of thermoplastic polycarbonates, thermoplastic polyoxymethylenes, thermoplastic acrylonitrile/butadiene/styrene graft copolymers, thermoplastic polybutylene terephthalates, thermoplastic polyethylene terephthalates, and mixtures thereof and (C) from 0.5 to 10 percent by weight based on the amount of (A) and (B), of a processing aid which is an acrylic polymer having a number average molecular weight of from 500,000 to 1,500,000. The acrylic polymers are preferably selected from the group consisting of homopolymers of methyl methacrylate and n-butyl methacrylate, copolymers of methyl methacrylate and ethyl acrylate and terpolymers of methyl methacrylate, n-butyl acrylate and styrene, said homopolymers, copolymers and terpolymers having number average molecular weights of from 500,000 to 1,500,000.

REFERENCES:
patent: 3700752 (1972-10-01), Hutchinson
patent: 3829531 (1974-08-01), Graff
patent: 3859381 (1975-01-01), Hutchinson
patent: 3868431 (1975-02-01), Hutchinson
patent: 3962370 (1976-06-01), Hutchinson
patent: 3994764 (1976-11-01), Wolinski
patent: 4080238 (1978-03-01), Wolinski

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