5-thio-substituted benzotriazole uv-absorbers and stabilized...

Details 5-thio-substituted benzotriazole uv-absorbers and stabilized... 5-thio-substituted benzotriazole uv-absorbers and stabilized...

C - Chemistry, Metallurgy

07

D

C07D 249/20 (2006.01) C07D 401/10 (2006.01) C07D 403/10 (2006.01) C07D 405/12 (2006.01) C07D 413/10 (2006.01) C07F 7/10 (2006.01) C07F 9/547 (2006.01) C07F 9/6518 (2006.01) C08F 220/38 (2006.01) C08K 5/3475 (2006.01) C08K 5/378 (2006.01) C09K 15/28 (2006.01)

Patent

CA 2099109

2-(2-Hydroxyphenyl)-2H-benzotriazole UV-absorbers substituted at the 5-position of the benzo ring by a thioether group exhibit enhanced absorption in the near visible range (over 350 nm) allowing said compounds to be particularly effective in protecting polymer systems which are prone to degradation caused by actinic irradiation with wavelengths over 350 nm. Compounds of formula A, B or C are disclosed: (see formula A, B or C) wherein R1, R2, R3, R5, T and n are as defined in the description.

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