- Synthesis of a novel water-soluble polymeric UV-absorber for cotton
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A water-soluble polymeric UV-absorber with polyvinylamine as backbone and benzotriazole type UV absorber as anti-UV functional group was synthesized by grafting brominated (2′-acetoxy-5′-methylphenyl)-2H-benzotriazole onto polyvinylamine. The intermediate
- Ma, Wei,Jiang, Xue,Liu, Yong,Tang, Bing Tao,Zhang, Shu Fen
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- WATER-SOLUBLE UV-ABSORBING COMPOUNDS AND USES THEREOF
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Described herein are dimethyl acetal-containing UV-absorbing compounds and their uses in preparing UV-absorbing polyvinyl alcohol prepolymers suitable for producing UV- absorbing contact lenses capable of blocking ultra-violet ("UV") radiation and optiona
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Page/Page column 52
(2017/06/27)
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- UV-ABSORBING VINYLIC MONOMERS AND USES THEREOF
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Described herein are water-soluble UV-absorbing vinylic monomers and their uses in preparing UV-absorbing contact lenses capable of blocking ultra-violet (“UV”) radiation and optionally (but preferably) violet radiation with wavelengths from 380 nm to 440
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Paragraph 0211; 0212; 0213
(2017/09/08)
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- 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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- Synthesis of new ultraviolet light absorbers based on 2-aryl-2H- benzotriazoles
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A procedure for the synthesis of some new ultraviolet absorbers of the benzotriazole series is reported. The compounds bear a carboxylic or a formyl group para to the hydroxy group, and these functionalities impart to the absorbers improved compatibility with certain disperse dyes on polyester fibers.
- Koutsimpelis, Aristides G.,Screttas, Constantinos G.,Igglessi-Markopoulou, Olga
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p. 1393 - 1401
(2007/10/03)
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- 2-(formylphenyl) benzotriazole intermediates
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Compounds of the formula STR1 wherein R is hydrogen or a hydroxy-protecting group are disclosed. The compounds are versatile intermediates which can be derivatized by reaction of the formyl group to provide a wide variety of ultraviolet-absorbing substitu
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