申请人:ATOCHEM NORTH AMERICA, INC.
公开号:EP0303986A2
公开(公告)日:1989-02-22
These are provided polymer bound stabilizers with recurring units selected from the formulas
or both wherein the units occur, e.g., in the polymer backbone, x is 0 or 1, R¹ and R² are, e.g., hydrogen, and each --
is the residue of a primary amino or hydrazido substituted stabilizer group selected from (a) hindered phenols, (b) hindered amine light stabilizers, (c) 2-hydroxybenzophenones, (d) 2-(2-hydroxyphenyl)-2H-benzotriazoles, (e) secondary aromatic amines, (f) benzothiazoles or benzimidazoles, (g) aryl salicylates, (h) salicylic acid derivatives (i) oxamide derivatives and (j) dialkyl sulfides, with the proviso that at least two different groups from (a) through (j) are attahced to the polymer. The polymeric stabilizers are prepared by the reaction of primary amino or hydrazido substituted stabilizers with some or all of the anhydride groups of the polymer or copolymer. They are not lost from the polymer by volatilization, migration or extraction, even at high temperature and may be used as concentrates to stabilize other polymers.
这些聚合物结合稳定剂具有选自下列公式的重复单元
或两者,其中单元出现在聚合物骨架等处,x 为 0 或 1,R¹ 和 R² 为氢等,且每 --
是伯氨基或肼基取代的稳定剂基团的残基,选自 (a) 受阻酚,(b) 受阻胺光稳定剂,(c) 2-羟基二苯甲酮,(d) 2-(2-羟基苯基)-2H-苯并三唑,(e) 仲芳香胺、(f) 苯并噻唑或苯并咪唑; (g) 芳基水杨酸盐; (h) 水杨酸衍生物; (i) 草酰胺衍生物;以及 (j) 二烷基硫化物,但聚合物中至少含有两个不同的(a)至(j)基团。聚合物稳定剂是通过伯氨基或肼基取代的稳定剂与聚合物或共聚物的部分或全部酸酐基团反应制备的。即使在高温条件下,它们也不会因挥发、迁移或萃取而从聚合物中流失,可用作稳定其他聚合物的浓缩物。