Catalyst-containing stable polyurethane forming compositions whi

Details Catalyst-containing stable polyurethane forming compositions whi Catalyst-containing stable polyurethane forming compositions whi

1980-11-14

1982-06-01

Welsh, Maurice J.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

2103211, 2103212, 2103213, 2103214, 2103215, 2105001, 2105002, 210506, C08G 1824

Patent

active

043329276

ABSTRACT:
The present invention is directed to improvements in non-cytotoxic polyurethane compositions. The improvement in the polyurethane compositions is achieved by reacting at least one NCO-terminated prepolymer and at least one polyol in the presence of a dialkyltin dicarboxylated catalyst composition. The catalyst reduces the curing time of the polyurethane resin and cannot be released therefrom. The improved polyurethane compositions are advantageously employed in separatory devices such as hollow fiber separatory devices intended to be used in biomedical applications. The separatory device employs at least one separatory membrane suitable for the intended end use application which is secured, potted or sealed in a housing using a cured flexible polyurethane composition.

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