Polyurethane prepared by reaction of an organic polyisocyanate,

Details Polyurethane prepared by reaction of an organic polyisocyanate, Polyurethane prepared by reaction of an organic polyisocyanate,

1981-10-14

1983-03-15

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521160, 521173, 521176, 528 60, 528 65, 528 66, 528 67, 528 76, 528 77, 528 80, 528 81, 528 83, C08G 1814

Patent

active

043768342

ABSTRACT:
Polyurethane resins are described having high impact strength and other structural strength properties, and significantly improved resistance to deformation by heat. The properties of these materials are such as to make them comparable to engineering thermoplastics such as nylon and like materials commonly used to fabricate structural components such as automotive parts, equipment housing, sporting goods, furniture, toys, household and like consumer goods.
The resins are prepared from organic polyisocyanates, an isocyanate-reactive material (polyol, polyamine, etc.) having an average functionality of at least 1.9, a Tg less than 20.degree. C. and molecular weight of 500-20,000, and one or more low molecular weight extenders the major distinguishing feature being the markedly lower proportion by weight (2 to 25 percent) in which the isocyanate-reactive material is employed as compared with polyurethane resins conventionally prepared in the art. Depending upon the particular combination of reactants employed the polyurethanes of the invention can be thermoplastic or thermoset and can be prepared in both cellular and non-cellular form.

REFERENCES:
patent: 2284637 (1942-06-01), Catlin
patent: 2284896 (1942-06-01), Hanford et al.
patent: 2511544 (1950-06-01), Rinke et al.
patent: 2873266 (1959-02-01), Urs
patent: 4169196 (1979-09-01), Ehrlich et al.
Otto Bayer: Angewandte Chemie, A59, No. 9, Sep. 1947 at pp. 255-288.

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