Process of producing cross-linked urethane-group comprising foam

Details Process of producing cross-linked urethane-group comprising foam Process of producing cross-linked urethane-group comprising foam

1975-04-01

1980-07-08

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, 521137, 521170, 521174, 521175, 521904, C08G 1832, C08G 1814

Patent

active

042118492

ABSTRACT:
In the disclosed process of producing resilient open-celled, cross-linked polyurethane foams, by foaming polyol, polyisocyanate, catalyst and blowing agent, the foaming is effected in the presence of a cross-linker which is a saturated or unsaturated, aliphatic, cycloaliphatic, heteroaliphatic or arylaliphatic crystalline polyhydroxy compound having at least 3 hydroxy groups. The crystalline polyhydroxy compound is insoluble or only slightly soluble in the polyol to be foamed and melts within the temperature range of about 60.degree.-160.degree. C. The amount of crystalline polyhydroxy compound to be used corresponds to about 0.1-5.0 hydroxy equivalent weights per 1 hydroxy equivalent weight of the polyol to be foamed.

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