Potassium catalyst system for preparing polyurethane based plywo

Details Potassium catalyst system for preparing polyurethane based plywo Potassium catalyst system for preparing polyurethane based plywo

1988-12-01

1990-02-13

Welsh, Maurice J.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524875, 528 57, C08L 7504, C08G 1822

Patent

active

049007769

ABSTRACT:
A plywood-patching composition is provided based on a noncellular polyurethane elastomer prepared by reacting a polyether or polyester polyol with a polyisocyanate in the presence of a catalytic amount of a substantially anhydrous potassium salt of a carboxylic acid having from 2 to about 20 carbon atoms, and process for preparing same. The catalysts utilized are relatively non-toxic, yet they promote rapid polymerization with essentially no foaming for a wide variety of non-cellular polyurethane elastomeric applications, particularly in plywood-patch applications where even small amounts of foaming is deleterious to the properties thereof.

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