Process of producing cross-linked open-celled polyurethane foam

Details Process of producing cross-linked open-celled polyurethane foam Process of producing cross-linked open-celled polyurethane foam

C - Chemistry, Metallurgy

08

K

403/21, 403/32

C08K 5/00 (2006.01) C08G 18/32 (2006.01) C08G 18/38 (2006.01) C08G 18/66 (2006.01)

Patent

CA 1074048

ABSTRACT OF THE DISCLOSURE 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, hetero- aliphatic 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 60-160°-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.

224044

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