Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
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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Bach Donald J.
Guthrie James L.
Cockeram H.S.
Pippenger Philip M.
Plunkett Richard P.
W. R. Grace & Co.
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