Benzotriazole UV absorbers typified by those of formula I
where R is tert-octyl, nonyl or dodecyl or -CHmCH2mCOOR4 where R4 is alkyl and m is 1 to 4, provide excellent light stability protection to organic substrates.
苯并三唑类
紫外线吸收剂,典型的如式 I 所示
其中 R 是叔辛基、壬基或
十二烷基,或 -CHmCH2mCOOR4,其中 R4 是烷基,m 是 1 至 4,可为有机基底提供出色的光稳定性保护。