Process for preparing flexible polyurethane foam

Details Process for preparing flexible polyurethane foam Process for preparing flexible polyurethane foam

1990-03-23

1992-02-18

Kight, III, John

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521107, 521108, 521119, 521131, 521132, 521154, 528 72, 528108, 528287, 528169, C08G 1814, C08G 1816, C08J 914

Patent

active

050895346

ABSTRACT:
This invention relates to the use of phosphorus-containing compounds, specifically cyclic organophosphorus compounds, as carbodiimidization catalysts in the preparation of open-celled flexible polyurethane foam for the purpose of controlling foam density and providing softer foams. foams that are softer and of lower density can be prepared with significantly reduced quantities of blowing agents in comparison to foams prepared in the absence of such phosphorus-containing compounds. Additionally, use of such catalysts provides for a reduced reaction exotherm during the preparation of the foam thereby minimizing foam discoloration or scorching. Preferred phosphorus-containing compounds are the 1-alkyl-1-oxophospholenes, especially 1-methyl-1-oxophospholene.

REFERENCES:
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patent: 4298709 (1981-11-01), Ginter et al.
patent: 4334944 (1982-06-01), Creye
patent: 4743624 (1988-05-01), Blount
patent: 4859713 (1989-08-01), Blount

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