申请人:CYTEC TECHNOLOGY CORP.
公开号:EP2647664A1
公开(公告)日:2013-10-09
The invention relates to a method for the stabilization of polyolefin films against degradation in the presence of agrochemicals comprising incorporation into the polyolefin a stabilizer composition comprising i) at least one o-hydroxyphenyl triazine ultraviolet light absorber (I) selected from 2-(2'-hydroxyphenyl)-1,3,5-triazine compounds ; ii) at least one ultraviolet light stabilizer selected from tetramethyl-4-piperidinyl compounds (II) according to Formula II
wherein: X represents a bridging group selected from the group of -O-C(=O)- , -CR'2-C(=O)-, -CR'2-C(=O)-NR'- , -NR'-C(=O)- , -C(=O)-NR'- , -O- , -NR'- or -C(=O)- where each R', independently, represents H or C1-20 hydrocarbyl; Z represents H, -R, -C(=O)-R or -OR where R is a C1-20 hydrocarbyl, said hydrocarbyl being optionally substituted with one or more hydroxyl, C1-30 alkoxy or C2-30 alkanoyl; R3 is a C6-30 hydrocarbyl; each of R1 and R2 is, independently, chosen from H and C1-C6 alkyl; and iii) at least one light stabilizer (III) chosen from hindered amine light stabilizers (HALS) different from compound of formula II.
本发明涉及一种防止聚烯烃薄膜在农用化学品存在下降解的稳定化方法,包括在聚烯烃中加入稳定剂组合物,该稳定剂组合物包括 i) 至少一种邻羟基苯基三嗪紫外线吸收剂(I),选自 2-(2'-羟基苯基)-1,3,5-三嗪化合物; ii) 至少一种紫外线稳定剂,选自符合式 II 的四甲基-4-哌啶基化合物(II); iii) 至少一种紫外线吸收剂(I),选自 2-(2'-羟基苯基)-1,3,5-三嗪化合物; iv) 至少一种邻羟基苯基三嗪紫外线吸收剂(I),选自 2-(2'-羟基苯基)-1,3,5-三嗪化合物。
其中X 代表选自-O-C(=O)- 、-CR'2-C(=O)- 、-CR'2-C(=O)-NR'- 、-NR'-C(=O)- 、-C(=O)-NR'- 、-O- 、-NR'- 或-C(=O)- 的桥接基团,其中每个 R'独立地代表 H 或 C1-20 烃基;Z 代表 H、-R、-C(=O)-R 或 -OR,其中 R 是 C1-20 碳氢基,所述碳氢基可选择被一个或多个羟基、C1-30 烷氧基或 C2-30 烷酰基取代;R3 是 C6-30 烃基;R1 和 R2 各自独立地选自 H 和 C1-C6 烷基;以及 iii) 至少一种光稳定剂(III),选自不同于式 II 化合物的受阻胺光稳定剂(HALS)。