Polyurethanes having improved crack growth resistance

Details Polyurethanes having improved crack growth resistance Polyurethanes having improved crack growth resistance

1987-11-18

1988-09-27

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...

528 60, 528 63, 528 64, 521914, C08G 1810

Patent

active

047743131

ABSTRACT:
Improved crack growth resistance is obtained when glycerine is added to a non-cured urethane prepolymer system containing free NCO groups therein and cured with a metal halide salt complex of methylenedianiline. The prepolymer is made from a blend of a polyether polyol and a polyether intermediate having ethylene oxide end blocks thereon.

REFERENCES:
patent: 4046743 (1977-09-01), Schonfeld
Dupont Adiprene Urethane Rubber Brochure, AP-720.21, 1981.

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