Preparation of water-impermeable polyurethane foam

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...

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521170, 521172, C08G 1832

Patent

active

055501699

ABSTRACT:
A flexible or semi-hard polyurethane foam is prepared from a blend containing a polyhydroxyl compound, an isocyanate, a blowing agent, a catalyst, and a foam stabilizer. A polyolefin polyol is used as the polyhydroxyl compound. A carboxy, epoxy or methacryl-modified organosilicone is used as the foam stabilizer. The resulting polyurethane foam is impermeable to water.

REFERENCES:
patent: 4279757 (1981-07-01), DeBeuckelaer et al.
patent: 4454253 (1984-06-01), Murphy et al.

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