Polyurethanes from 3,3-{40 dimethyl-diphenyl-4,4{40 -diisocyanate polyester diols and bis(hydroxyethyl ether) of hydroquinone

摘要

Polyurethane elastomers characterized by high thermostability and thermoplasticity are obtained by reaction of 3,3'-dimethyldiphenyl-4,4'-diisocyanate with a polyester diol (polycaprolactone diol preferred) and the bis(2-hydroxyethyl ether) of hydroquinone. The elastomers are useful in gasketing, seals, o-rings, wire coatings and like applications in which service temperatures of 120 DEG C or even higher are a requisite.