- Ultraviolet light absorbing ketones of 2-(2-Hydroxyphenyl) benzotriazole
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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 R1 is hydrogen atom, or a halogen atom, or a straight-chain or branched lower alkyl or lower alkoxy of 1 to 4 carbon atoms; R2 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 R3 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.
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Page/Page column 10
(2010/04/30)
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