Polyurethanes made with polydiene diols, diisocyanates, and dime

Details Polyurethanes made with polydiene diols, diisocyanates, and dime Polyurethanes made with polydiene diols, diisocyanates, and dime

1997-10-09

1999-01-26

Gorr, Rachel

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 1862

Patent

active

058640010

ABSTRACT:
The present invention is polyurethane compositions comprising from 1 to 80% by weight of a polydiene diol having from 1.6 to 2, more preferably 1.8 to 2, and most preferably 1.9 to 2, terminal hydroxyl groups per molecule and a number average molecular weight between 500 and 20,000, more preferably between 1,000 and 10,000, from 20 to 99% by weight of a hard segment comprised of an isocyanate having two isocyanates groups per molecule and dimer diol as a chain extender. The polyurethane compositions described herein are stronger than other polydiene diol-based polyurethane compositions.

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