Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1997-08-11
1999-03-02
Cooney, Jr., John M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521160, 521170, 521174, C08G 1804
Patent
active
058772278
ABSTRACT:
The present invention is directed to a low density flexible polyurethane foam and the process of making the same from a polyisocyanate composition and an isocyanate reactive composition wherein the polyisocyanate composition comprises a semi-prepolymer which is the reaction product of an excess of a base isocyanate formulation with a polyoxyethylene polyol, said base isocyanate formulation comprising a mixture of diphenylmethane diisocyanate and polyphenylpolymethylene polyisocyanate, said diphenylmethane diisocyanate comprising, inter alia, 2, 4'-MDI in prescribed amounts, whereby the functionality of the base isocyanate formulation ranges from 2.07 to 2.12 and said isocyanate reactive composition comprises water, a second polyoxyethylene polyol, a cross-linker and catalyst.
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Cooney Jr. John M.
Imperial Chemical Industries plc
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