Polyol mixtures containing reactive blowing agents and use there

Details Polyol mixtures containing reactive blowing agents and use there Polyol mixtures containing reactive blowing agents and use there

1981-10-08

1982-10-05

Cockeram, H. S.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

252182, 521 51, 521128, 521130, C08G 1814, C08G 1832

Patent

active

043528961

ABSTRACT:
This invention relates to mixtures of polyols which are liquid at room temperature with functional aldoximes as blowing agents, wherein the aldoxime groups react with polyisocyanates to liberate carbon dioxide and are simultaneously incorporated by means of the functional group thereof into the polyurethane formed. The present invention also relates to a process for the production of polyurethane foams using these incorporated reactive blowing agents as the primary blowing agent in combination with blowing agents known in polyurethane chemistry. The process according to the invention described herein is suitable for the production of various polyurethane foams or cellular polyurethane elastomers, particularly including the production of semi-rigid and rigid polyurethane integral skin foams which are obtained by foaming the reaction mixture in closed molds.

REFERENCES:
patent: 4070310 (1978-01-01), Schneider et al.
Polyurethanes Chemistry and Technology, Interscience Publishers, 1962, New York, Part 1, Chemistry, p. 82.
"Unconventional Blowing Agents for Polyurethane Foams," Abstract No. 96089e, and Int. Prog. Urethanes, vol. 2, 1980 of Chemical Abstracts, vol. 93, No. 10, pp. 153-173.

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