Polyurethane foams

Details Polyurethane foams Polyurethane foams

1994-04-06

1995-10-17

Sellers, Robert E.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521160, 521174, 521176, 521914, 528 67, 528 76, 528 77, C08J 900

Patent

active

054591708

ABSTRACT:
A method for the preparation of flexible polyurethane foams by reacting a polyisocyanate containing at least 85% by weight of 4,4'-diphenylmethane diisocyanate or a liquid variant thereof with a polyol composition comprising at least one poly(oxyethylene-oxyalkylene) polyol, the composition having an average nominal hydroxyl functionality of from 2.5 to 6, a number average hydroxyl equivalent weight of from 1000 to 3000 and an average oxyethylene content of from 25 to less than 50% by weight and with water.

REFERENCES:
patent: 4098732 (1978-07-01), Yukuta et al.
patent: 4266043 (1981-05-01), Fujii et al.
patent: 4365025 (1982-12-01), Murch et al.
patent: 4478960 (1984-10-01), Buethe et al.
patent: 5043360 (1991-08-01), Pham et al.
patent: 5124369 (1992-06-01), Vandichel et al.

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