Patent ID: 9441314
Filing Date: 2016-09-13
CPC Classification: C08G,D01D,D01F

Claim Text:
1. Spandex comprising a polyurethaneurea comprising the reaction product of: (a) a poly(tetramethylene-co-ethyleneether) glycol comprising constituent units derived by copolymerizing tetrahydrofuran and ethylene oxide wherein the portion of the units derived from ethylene oxide is present in the poly(tetramethylene-co-ethyleneether) glycol from about 48 mole percent to about 70 mole percent and the number average molecular weight of said glycol is from 1900 Dalton to about 4000 Dalton; (b) at least one diisocyanate, said diisocyanate present in a molar ratio of diisocyanate to poly(tetramethylene-co-ethyleneether) glycol of about 1.2:1 to about 2.3:1; and (c) at least one diamine chain extender selected from the group consisting of ethylene diamine, 1,3-butanediamine, 1,4-butanediamine, 1,3-diamino-2,2-dimethylbutane, 1,6-hexanediamine, 1,2-propanediamine, 1,3-propanediamine, N-methylaminobis(3-propylamine), 2-methyl-1,5-pentanediamine, 1,5-diatninopentane, 1,4-cyclohexanediamine, 1,3-diamino-4-methylcyclohexane, 1,3-cyclohexane-diamine, 1,1-methylene-bis(4,4′-diaminohexane), 3-aminomethyl-3,5,5-trimethylcyclohexane, 1,3-diaminopentane, m-xylylene diamine, hydrazine, and mixtures thereof, said diamine chain extender having between 0 and about 20 mole percent co-extenders; and at least one chain terminator.