| abstract |
An ultraviolet wavelength region of 300 to 400 nm that can correspond to the spectral irradiance distribution of the ultraviolet portion of sunlight that reaches from the sun on the ground, and particularly excellent in ultraviolet absorption performance in a wavelength region of 330 to 400 nm with high integrated energy, and coloring. Provides a low polymer. A benzotriazole (co) polymer obtained by polymerizing a raw material containing a resorcinol-type benzotriazole monomer represented by the following general formula. [Preferably, R1 and R2 are H, R3 is an alkyl group, R4 is H, an alkyl group, an alkacryloyloxyalkyl group, or a methacryloyloxyalkyl group] [Selection] FIG. |