Novel composition for preparing urethane/urea block copolymers

Details Novel composition for preparing urethane/urea block copolymers Novel composition for preparing urethane/urea block copolymers

1978-10-13

1980-03-25

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...

C08G 1816

Patent

active

041951506

ABSTRACT:
The reaction between an isocyanate-terminated prepolymer and an aromatic diamine to form an elastomeric urethane-urea copolymer is accelerated using a quaternary ammonium compound as the catalyst. The quaternary ammonium compound is optionally employed in combination with a mono- or polyfunctional carboxylic acid containing from 4 to 20 carbon atoms.

REFERENCES:
patent: 2929800 (1960-03-01), HIll
patent: 3157621 (1964-11-01), Deggingen
patent: 3487080 (1969-12-01), Matsui et al.

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