| abstract |
The present invention relates to the application and utilization to benzotriazoles having hydroxyl or carboxyl groups. Alkyl chain (R-CH 3 ) or methyl group (R-CH 3 ) attached to phenyl on benzotriazole [typically Tinuvin P, (2 (2'-Hydroxy-5'-methyl-phenyl) benzotriazole)] ) By oxidizing with R-CH 2 OH and R-COOH to synthesize reactive UV absorbers Synthetic benzotriazole has a reactive hydroxyl group, which can participate in polymer polymerization, especially polyester reactions. It is a monomer capable of binding at the end of the main chain, that is, it can be referred to as a high molecular weight reaction stabilizer, and is an ultraviolet absorbent with excellent performance to increase the molecular weight or to achieve high molecular weight unlike the hals system, or because there is a hydroxyl group, the surface of the polymer It can be grafted with carboxyl groups, alcohols, isocyanates which are reactive to, and have a better effect than binding to the main chain. |