Polyether polyols, water-curable polyurethane prepolymers based

Details Polyether polyols, water-curable polyurethane prepolymers based Polyether polyols, water-curable polyurethane prepolymers based

1993-01-04

1995-04-18

Kight, III, John

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521914, 528 76, 528 77, 528 78, 25218227, 2521822, 25218221, 25218222, 560158, 568624, C08G 1810

Patent

active

054079683

ABSTRACT:
The invention relates to a polyether polyol, a water-curable polyurethane prepolymer prepared by using the polyether polyol, and a composition containing the prepolymer. The above polyether polyol is obtainable by subjecting an active hydrogen compound to addition polymerization reaction with ethylene oxide and an alkylene oxide of 3 to 4 carbon atoms in a specified ratio. The above water-curable polyurethane prepolymer is obtainable by reacting the polyether polyol with a polyisocyanate compound. The above composition comprises a mixture of the water-curable polyurethane prepolymer and the polyisocyanate. The above water-curable polyurethane prepolymer and composition provide a foam of fine and uniform cell structure with improved strength on curing with water.

REFERENCES:
patent: 4082703 (1978-04-01), Duffy et al.
patent: 4312973 (1982-01-01), Critchfield et al.

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