Invista North America S.a.r.l.

Dupont Dow Elastomers Inc.

Gary Arthur Lodoen

Charles Francis Palmer, Jr

Gerfried Pruckmayr

Donald D Bretches

A spandex comprising a polyurethane or polyurethaneurea reaction product of at least one diisocyanate compound and a poly(tetramethylene-co-ethyleneether) glycol comprising constituent units derived by copolymerizing tetrahydrofuran and ethylene oxide wherein the percentage of ethylene ether moieties is from about 16 to about 70 mole percent with at least one chain extender selected from the group consisting of diamines and diols and at least one chain terminator wherein the spandex is spun at a speed in excess of about 750 meters per minute.

Spandex compositions for high speed spinning

A copolymer with recurring constituent units derived by polymerizing tetrahydrofuran, ethylene oxide and at least one additional cyclic ether that can be substituted or unsubstituted that decreases the hydrophilicity imparted to the copolymer by the ethylene oxide.

Copolymers of tetrahydrofuran, ethylene oxide and an additional cyclic ether

The invention provides a highly uniform spandex fiber and a method for making it. The polyurethaneurea component of the spandex has both alkylurethane and monoalkylurea ends, with a ratio of monoalkylurea ends to alkylurethane ends of from 0.5:1 to 10:1.

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Waynesboro, VA, United States of America

Gary Arthur Lodoen