Polyacetal resin compositions are provided having improved light stability and comprising an alkylidene bis(benzotriazolyl phenol) having the formula:
wherein:
R, is selected from the group consisting of hydrogen and alkyl having from one to about eleven carbon atoms;
R2 is selected from the group consisting of alkyl having from one to about twelve carbon atoms; and arylalkyl having from seven to about eighteen carbon atoms; and
X is selected from the group consisting of hydrogen; halogen; alkyl having from one to about twelve carbon atoms; aryl alkyl having from seven to about eighteen carbon atoms; alkoxy having from one to about twelve carbon atoms; phenoxy; arylalkoxy having from seven to about eighteen carbon atoms; and phenyl.
所提供的聚
缩醛树脂组合物具有更好的光稳定性,并包含具有以下式子的亚烷基双(苯并三唑基
苯酚):
其中
R,选自由氢和具有 1 至约 11 个碳原子的烷基组成的组;
R2 选自具有 1 至约 12 个碳原子的烷基和具有 7 至约 18 个碳原子的芳烷基所 组成的组;以及
X 选自由氢、卤素、1 至约 12 个碳原子的烷基、7 至约 18 个碳原子的芳基烷基、1 至约 12 个碳原子的烷氧基、苯氧基、7 至约 18 个碳原子的芳基烷氧基和苯基组成的组。