Highly elastic polyurethane foams and process for making them

Details Highly elastic polyurethane foams and process for making them Highly elastic polyurethane foams and process for making them

1977-05-13

1978-08-15

Welsh, M. J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 51, 521176, C08G 1814, C08G 1832

Patent

active

041071026

ABSTRACT:
An elastic polyurethane foam having a density, sag factor, tensile strength and elongation at break which adapt it for use in upholstery is prepared by reacting a poly(alkylene ether) polyol having at least about 10% by weight of primary hydroxyl groups and hydrazine or a hydrazine adduct with an organic polyisocyanate which contains at least about 50% by weight of distilled tolylene diisocyanate.

REFERENCES:
patent: 2834748 (1958-05-01), Bailey et al.
patent: 2957852 (1960-10-01), Frankenburg et al.
patent: 3316285 (1967-04-01), Cleveland
Saunders et al., Polyurethane, Part II, Interscience, NY, 1964, pp. 120-124.

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