Process for producing isocyanate-based foams

Details Process for producing isocyanate-based foams Process for producing isocyanate-based foams

1994-11-08

1995-06-27

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521174, 521176, 521914, C08G 1800

Patent

active

054280770

ABSTRACT:
Isocyanate-based foams are produced by the reaction of polyisocyanates with compounds with molecular weights of from 400 to 10,000 and having at least two hydrogen atoms active towards isocyanates in the presence of hydrocarbons which are vaporizable under the foaming conditions as blowing agents. The active hydrogen component is a mixture of a) one or more nitrogen-free polyethers having at least two hydrogen atoms active towards isocyanates and containing oxyethylene residues, and b) one or more polyethers having at least two hydrogen atoms active towards isocyanates and containing no oxyethylene groups.

REFERENCES:
patent: 3072582 (1963-01-01), Frost
patent: 4585807 (1986-04-01), Christman
patent: 5096933 (1992-03-01), Volkert
patent: 5182309 (1993-01-01), Hutzen

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