Light stabilizer comprised of aryl nitrogen compound and...

Details Light stabilizer comprised of aryl nitrogen compound and... Light stabilizer comprised of aryl nitrogen compound and...

C - Chemistry, Metallurgy

07

C

260/600, 96/71,

C07C 207/04 (2006.01) C07C 211/56 (2006.01) C07C 229/54 (2006.01) C07C 243/22 (2006.01) C07C 255/50 (2006.01) C08K 5/32 (2006.01) G11B 7/244 (2006.01)

Patent

CA 2016195

Certain types of aryl nitrogen compound are found to be useful not only for effectively rendering dyes lightfast but also for using as an additive that has high solubility in solvents and sufficiently good miscibility with dyes to insure that their solubility will not be impaired. They can be used for preventing various reactions that cause deterioration by light in organic dyes, in particular cyanine dyes. They can also be used for improving the keeping quality and recording and reproduction characteristics of optical recording media that use organic dyes in the form of thin films. Representative examples include N, N-lower alkyl substituted nitroso-anilines, phenol or naphthol derivatives having at least one nitroso group, nitrosodiphenylamine and its derivatives and 1-pycryl-2, 2-diarylhydrazyl free radicals.

Certains types de composés azotés aryliques se sont révélés utiles non seulement pour augmenter efficacement la solidité à la lumière des colorants mais également pour servir d'additif ayant une grande solubilité dans les solvants et une miscibilité suffisamment bonne dans les colorants pour ne pas affecter leur solubilité. Ils peuvent être utilisés pour prévenir diverses réactions qui causent la dégradation des colorants organiques par la lumière, en particulier les colorants à base de cyanine. Ils peuvent également être utilisés pour améliorer la conservation et les caractéristiques d'enregistrement et de reproduction des supports d'enregistrement optique qui font appel à des colorants organiques sous forme de films minces. Parmi les exemples représentatifs figurent les dérivés de la N, N-nitroso-aniline substitués par un alkyle inférieur, les dérivés du phénol ou du naphtol portant au moins un groupe nitroso, la nitrosodiphénylamine et ses dérivés et les radicaux libres 1-pycryl-2, 2-diarylhydrazyle.

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