The synthesis and characterization of UV-absorbing azo-pigments and their polymerizable acryloyloxy and methacryloyloxy derivatives

Shuhaibar, K. F.

doi:10.1016/0143-7208(92)80012-c

Cited by 5 publications

(2 citation statements)

References 10 publications

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“…The desired monobenzotriazolyl or dibenzotriazolylbenzophenones were prepared by reaction of the corresponding azo compounds with thiourea-S,S-dioxide and sodium hydroxide in a mixture of 2-propanol and water (1 : 1 by volume) according to procedures described. 12,13 These compounds were purified by appropriate methods until chromatographically pure and identified by 1 H NMR spectra using a Bruker DPX 400S spectrometer and elemental analyses employed a Yanaco MT-6. The formulas of dye 1 and 2, and these materials are shown in Figures 3 and 4.…”

Section: Methodsmentioning

confidence: 99%

Development of UV absorbers for sun protective fabrics

Oda

2011

Textile Research Journal

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The textiles for protection against harmful UV radiation have become the focus of great interest in the present time. However, not all apparel is well-protected against UV light. Therefore, the application and improvement of UV absorbers for sun protective fabrics is being sought. In this study, various benzophenone UV absorbers containing benzotoriazolyl groups were prepared, and the Ultraviolet Protection Factors (UPF) and improving the light fastness of dyes was examined. A series of hydroxybenzophenones bearing a built-in benzotriazole moiety showed a very high UPF, and played a very important role in the improvement of light fastness of dyes. It was found that 2,2’,4,4’-tetrahydroxy-5,5’-dibenzotriazolylbenzophenonesulfonic acid or the methyl derivative shows very high UPF, and plays an important role in improving the light fastness of dyes. It was further demonstrated that the combined use of these UV absorbers and singlet oxygen quencher, NTS (Nickel p-toluenesulfonate), can be applied as effective stabilizers against the photofading of dyes.

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Section: Methodsmentioning

confidence: 99%

Development of UV absorbers for sun protective fabrics

Oda

2011

Textile Research Journal

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show abstract

“…The desired monobenzotriazolyl or dibenzotriazolylbenzophenones were synthesized by reaction of the corresponding azo compounds with thiourea-S,S-dioxide and sodium hydroxide in a mixture of 2-propanol and water (1 : 1 by vol.) according to procedures described [11,12]. These compounds were purified by appropriate methods until chromatographically pure and identified by 1 H NMR, mass, IR and elemental analyses.…”

Section: Metarialsmentioning

confidence: 99%