Process for producing polyurethane/urea elastomers

Details Process for producing polyurethane/urea elastomers Process for producing polyurethane/urea elastomers

1987-03-16

1988-02-02

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 85, C08G 1810

Patent

active

047229896

ABSTRACT:
This invention relates to a solvent-free process for producing polyurethane/urea elastomers wherein an aromatic diisocyanate is reacted with a compound having active Zerewitinoff hydrogen atoms and an aromatic diamine chain extender. The improvement for producing urethanes having a wide range of properties comprises including a urethane-linked diisocyanate in the polyurethane urea elastomer. The urethane-linked diisocyanate is one that is formed by reacting toluenediisocyanate or substituent thereof with a short chain diol under conditions such that the urethane linked diisocyanate comprises two equivalents isocyanate per equivalent diol.

REFERENCES:
patent: 3456037 (1969-07-01), Hoeschele

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