Polymeric light stabilizers are provided having at least one 2,2,6,6-tetraalkyl piperidyl group in the molecule and a molecular weight within the range from about 1000 to about 20,000, that are polymers of an unsaturated carboxylic acid ester selected from the group consisting of unsaturated cycloaliphatic mono-, di-, and tri-carboxylic acid esters having from seven to about thirty carbon atoms; unsaturated branched-chain aliphatic di- and tri-carboxylic acid esters having from four to about thirty carbon atoms; sorbic acid ester, 3,8-nonadienyl acid ester, oleic acid ester, linolenic acid ester and ricinoleic acid ester; or copolymers of at least one thereof with another copolymerizable unsaturated monomer; and synthetic resin compositions having improved light stability comprising per 100 parts by weight of resin from 0.001 to 10 parts by weight of the polymeric light stabilizer.
聚合物
光稳定剂分子中至少有一个 2,2,6,6-四烷基
哌啶基团,分子量在约 1000 至约 20,000 范围内,是不饱和
羧酸酯的聚合物,该不饱和
羧酸酯选自具有 7 至约 30 个碳原子的不饱和环脂族一元、二元和三元
羧酸酯;具有 4 至约 30 个碳原子的不饱和支链脂肪族二元和三元
羧酸酯;
山梨酸酯;3,8-壬二烯酸酯;具有四个至三十个碳原子的不饱和支链脂肪族二
羧酸酯和
三羧酸酯;
山梨酸酯、3,8-壬二烯酸酯、
油酸酯、
亚麻酸酯和
蓖麻油酸酯;或其中至少一种与另一种可共聚的不饱和单体的共聚物;以及具有更好光稳定性的合成
树脂组合物,每 100 份
树脂(重量)中包含 0.001 至 10 份(重量)的聚合
光稳定剂。