| 摘要 |
TITLE Oligomeric Semicarbazide Additive for Spandex Oligomeric 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. ( L I - 9 0 0 . 1 0 L I - 0 0 4 4 6 7 )
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