SMOLENSKIJ, I. N.;GONTAR, S. S.;MARKOV, V. I., VOPR. XIMII I XIM. TEXNOL., KIEV, 1985, N 78, 112-117
作者:SMOLENSKIJ, I. N.、GONTAR, S. S.、MARKOV, V. I.
DOI:——
日期:——
US4265804A
申请人:——
公开号:US4265804A
公开(公告)日:1981-05-05
‘Latent’ ultraviolet light absorbers
作者:Christoph Kocher、Christoph Weder、Paul Smith
DOI:10.1039/b209394d
日期:——
We have synthesized and characterized photo-labile and acid-labile esters of 2-hydroxybenzophenone and 2-hydroxybenzotriazoles, which, upon appropriate treatment, release classical UV absorbers. Two concepts of âlatentâ UV absorbers are presented, namely, benzoyl-caged species which release their parent UV absorber upon short-wavelength UV irradiation, and acid-labile species caged with the tert-butoxycarbonyl group which were employed in combination with a photoacid generator. The latent UV absorbers were melt processed into thermoplastic polymers such as linear low density polyethylene and absorbingânon-absorbing patterns were produced in the polymer blend films by spatially resolved conversion, illustrating their usefulness for optical data storage applications.
Ultraviolet light absorbing ketones of 2-(2-Hydroxyphenyl) benzotriazole
申请人:Chang Chia-Hu
公开号:US20100086500A1
公开(公告)日:2010-04-08
The invention relates to ultraviolet light absorbing compounds, their preparation and uses as protective agents and stabilizers in coatings, plastics and topically applied products. The compounds are ketone derivatives of 2-(2-hydroxyphenol) benzotriazole of formula I,
where R
1
is hydrogen atom, or a halogen atom, or a straight-chain or branched lower alkyl or lower alkoxy of 1 to 4 carbon atoms; R
2
is an unsubtituted or substituted aryl group or an unsubstituted or substituted straight-chain or branched alkyl having 1 to 18 carbon atoms or a cycloaliphatic group having 5 to 6 carbon atoms; and R
3
is a straight-chain or branched alkyl or alkylaryl group or alkoxyl or phenyl or phenyl substituted with alkyl, cycloalkyl, carboalkoxy, chlorine or arylalkyl groups.