| abstract |
PROBLEM TO BE SOLVED: To provide a novel benzotriazole group-containing polyester, a method for producing the same, an ultraviolet absorber containing the same, and a resin composition excellent in light resistance and chemical resistance. SOLUTION: 3- (5-chloro-2H-benzotriazol-2-yl) -5- (1,1-dimethylethyl) -4-hydroxy-benzenepropanol, 3- (2H -Benzotriazol-2-yl) -4-hydroxy- Benzeneethanol, 3- (5-methyl-2H-benzotriazol-2-yl) -5- (1-methylethyl) -4-hydroxy-benzenepropanol, bis [3- (2H-benzotriazol-2-yl) -4-hydroxy-benzeneethanol] methane or the like is subjected to ring-opening addition polymerization of a lactone at its alcoholic hydroxyl group, A benzotriazole group-containing polyester is obtained, which is used as a UV absorber and blended into a thermoplastic resin. |