Copolymer 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 copolymers of a maleic or fumaric acid ester containing a 2,2,6,6-tetraalkyl piperidyl group in the alcohol group of the formula:
wherein
R2 is alkyl or R1;
Re is lower alkyl or hydroxyalkyl;
R3 is hydrogen alkaryl or alkyl, hydroxyalkyl or eopx- yalkyl;
R4 is hydrogen or methyl;
R5 is alkylene;
Y is >CH2, >C=0, >CH-OH or
R7 is alkylene;
and at least one monomer selected from the group consisting of aliphatic carboxylic acid vinyl ester having from two to eight carbon atoms; alkyl vinyl ethers having from one to eighteen carbon atoms; triallyl isocyanurate; pinene; and tricyclo- (5.2.1.02.6)-decene-3; and synthetic resin compositions having improved light stability comprising per 100 parts by weight of resin from 0.001 to 5 parts by weight of the polymeric light stabilizer.
共聚
光稳定剂分子中至少有一个 2,2,6,6-四烷基
哌啶基,分子量在约 1000 至约 20000 之间,是
马来酸酯或
富马酸酯的共聚物,其醇基中含有 2,2,6,6-四烷基
哌啶基:
其中
R2 是烷基或 R1;
Re是低级烷基或羟基烷基
R3 是氢烷基芳基或烷基、羟基烷基或异丙基烷基;
R4 是氢或甲基
R5 是亚烷基;
Y 是 >
CH2、>C=0、>CH-OH 或
R7 是亚烷基;
和至少一种选自以下组别的单体:具有 2 至 8 个碳原子的脂肪族
羧酸乙烯酯;具有 1 至 18 个碳原子的烷基
乙烯基醚;异
氰尿酸三烯丙基酯;
蒎烯;和
三环-(5.2.1.02.6)-
癸烯-3;以及具有更高光稳定性的合成
树脂组合物,其中每 100 份
树脂重量包含 0.001 至 5 份聚合物
光稳定剂。