| 摘要 |
A process for enhancing the thermal, oxidative and photochemical stability of dyed or printed polyamide fiber material, comprises treating the polyamide fiber material, before, during or after a dyeing or printing step, with an effective stabilizing amount of a stabilizer mixture which comprises at least one compound of the formula and at least one compound of the formula in which R1 and R1' independently of one another are each linear or branched C1-C18alkyl, C3-C8cycloalkyl, C3-C6alkenyl, unsubstituted or substituted aryl or C7-C12aralkyl, and R2, R2', R3, R3', R4 and R5 are as described herein. The treated polyamide fiber materials have excellent thermal, oxidative and photochemical stability.
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