Simulated natural sponge based on hydrophilic polyurethane

Details Simulated natural sponge based on hydrophilic polyurethane Simulated natural sponge based on hydrophilic polyurethane

1977-07-15

1979-07-03

Cockeram, H.S.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521116, 521905, 521914, 252351, 252DIG1, C08G 1814, C08G 1810, C08G 1848

Patent

active

041600762

ABSTRACT:
The invention disclosed is for new improved hydrophilic crosslinked polyurethane foams which simulate natural sponges and prepared by reacting an isocyanate capped polyoxyethylene polyol reactant with an aqueous reactant and a carefully balanced combination of a nonionic surface-active agent and a liquid defoaming agent. The resultant foams are characterized by a majority of large size cells and membranes which themselves are foamed with small cells.

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patent: 3861993 (1975-01-01), Guthrie
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patent: 3890254 (1975-06-01), Guthrie

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