Open-celled flexible polyurethane foams and a process for their

Details Open-celled flexible polyurethane foams and a process for their Open-celled flexible polyurethane foams and a process for their

1991-02-26

1991-08-13

Foelak, p Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 97, 521130, C08J 908

Patent

active

050397125

ABSTRACT:
Open-celled, elastic, flexible polyurethane foams are made without using a chlorofluorocarbon blowing agent. A polyisocyanate is reacted with a polyether in the presence of water and from about 0.1 to abour 10% by weight (based on polyether) of an organic blowing agent selected from dicarbonic acid alkyl esters, dicarbonic acid cycloalkyl esters, dicarbonic acid benzyl esters and combinations thereof. Optional starting materials include catalysts, chain lengthening agents, emulsifiers and other commonly used additives.

REFERENCES:
patent: 4070310 (1978-01-01), Schneider et al.
patent: 4297442 (1981-10-01), Blahak
patent: 4983320 (1991-01-01), Franklin et al.

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