Oligomeric semicarbazide additives for spandex

Details Oligomeric semicarbazide additives for spandex Oligomeric semicarbazide additives for spandex

1989-09-29

1990-11-27

Hoke, Veronica P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524191, 564 34, 564 35, 564 37, C08K 526, C07C13302

Patent

active

049736183

ABSTRACT:
Oligormeric polyether/urethanes with semicarbazide end-groups protect spandex fibers from discoloration in atmospheric fumes and/or light. The oligomers are prepared from polyether glycols, diisocyanates and N,N-dialkylhydrazine.

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Research Disclosure, 14428 "Improved Elastomeric Yarn", Apr. 10, 1976.

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