Patent ID: 6063892
Filing Date: 2000-05-16
Classification: C08G,D01F,Y10S

Abstract:
Spandex comprising a polyurethaneurea derived from:a polyether glycol selected from the group consisting of poly(tetramethyleneether) glycol and poly(tetramethylene-co-3-methyltetramethyleneether) glycol;1,1-methylenebis(4-isocyanatobenzene);a second diisocyanate; anddiamine chain extender;wherein the second diisocyanate is selected from the group consisting of 2,2-bis(4-isocyanatophenyl)propane and 1,4-bis(4-isocyanato-alpha,alpha-dimethylbenzyl)benzene and is present in the range of about 5-50 mole % of total diisocyanate and wherein the chain extender contains at least 80 mole % ethylene diamine of the total chain extenders.