C - Chemistry – Metallurgy – 07 – D
Patent
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 7/18 (2006.01) C07F 9/547 (2006.01) C07F 9/6518 (2006.01) C08F 220/38 (2006.01) C08K 5/3475 (2006.01) C08K 5/41 (2006.01) C09D 7/12 (2006.01) C09K 15/28 (2006.01)
Patent
CA 2098999
2-(2-Hydroxyphenyl)-2H-benzotriazole UV-absorbers substituted at the 5-position of the benzo ring by a sulfoxide or sulfone group exhibited 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. Such compounds are at the formula A, B or C: (see formula A, B or C) wherein R1, R2, R3, R5, L, T and n are as defined in the description.
Holt Mark S.
Ravichandran Ramanathan
Stevenson Tyler A.
von Ahn Volker H.
Winter Roland A. E.
Ag Ciba-Geigy
Ciba Specialty Chemicals Holding Inc.
Fetherstonhaugh & Co.
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