| abstract |
Disclosed are copolyesterethers having an inherent viscosity of from about 0.8 to about 1.5 comprising A. a dicarboxylic acid component consisting essentially of 1,4-cyclohexanedicarboxylic acid having a trans isomer content of at least 70%, and B. a glycol component consisting essentially of (1) 1,4-cyclohexanedimethanol, and (2) from about 15 to about 50 weight percent, based on the weight of the polyesterether, of polytetramethyleneether glycol having a molecular weight of about 500 to about 1100, C. from about 0.1 to about 1.5 mole %, based on the mole % of the acid or glycol component, of a branching agent having at least three COOH or OH functional groups and from 3 to 60 carbon atoms, said copolyesterethers being characterized by having a die swell of between about -90% and about +100% and a minimum crystallization time of less than 2.5 minutes. |