Thiokol Corporation

William A Jackle

Michael P Mazzeo

Marina N Gillis

Hydroxy terminated polyethers are capped with toluene diisocyanate, and the amount of unreacted toluene diisocyanate substantially reduced. When cured with 4,4'-methylene-bis-(2-chloroaniline), the cured products have superior dynamic properties to the corresponding toluene diisocyanate capped polyethers with usual unreacted toluene diisocyanate content. The cured products are useful in fabricating industrial tires.

Polyether based urethanes with superior dynamic properties

Isocyanate-terminated prepolymers can be cured with di- and triamino-s-triazines of formula ##STR1## where R is ##STR2## --S--R.sub.5 ; --O--R.sub.6 or ##STR3## where at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is hydrogen; R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are hydrogen or an optionally substituted aromatic or aliphatic group and

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Newtown, PA, United States of America

William A Jackle