申请人:Hoechst Celanese Corporation
公开号:EP0885924A2
公开(公告)日:1998-12-23
Elastomeric monofilament exhibiting improved long term retention of strength and elongation after exposure to test conditions described by SAE J-1885 are disclosed. The monofilaments comprise in specified amounts as weight percents on weight of monofilament:
(1) at least one elastomeric copolyester polymer, and a stabilizing system comprising:
(2) at least 1% carbon black,
(3) at least one antioxidant,
(4) an oligomeric hindered piperidinyl (HALS) compound having a pKa of less than 7 or a pKa from 7 to 12 in combination with an acid scavenger, and
(5) a UV stabilizer other than a hindered piperidinyl (HALS) compound.
The preferred embodiment is a heterofilament wherein the sheath copolyester has a lower melting point than the core and contains (4) according to:
as specified.
本发明公开了在 SAE J-1885 所描述的测试条件下长期保持强度和伸长率的弹性单丝。这些单丝以单丝重量百分比的形式按规定数量组成:
(1) 至少一种弹性共聚聚酯聚合物和一种稳定体系,该稳定体系包括
(2) 至少 1%的炭黑
(3) 至少一种抗氧化剂
(4) 低聚受阻哌啶基(HALS)化合物,其 pKa 小于 7 或 pKa 为 7 至 12,与酸清除剂结合使用,以及
(5) 除受阻哌啶(HALS)化合物以外的紫外线稳定剂。
优选的实施方案是一种异性丝,其中鞘共聚多酯的熔点比芯低,并含有(4)根据:
所述。