V.35,no.4,Dec 2023 https://doi.org/10.5764/TCF. Journal Textile Coloration and Finishing Year / Vol., Issue, Month 2021 / V.33,no.1,Mar Title Synthesis of Azo Based Disperse Dyes for Dyeing Polyester Fiber in Supercritical Carbon Dioxide Authors Seung-Rim Shin, Kyoung-Lyong An, Sunhye Lee, Eunhee Ko1, In-Yeol Lee1, Changil Kim2 and Kun Jun Institution/Affiliations Korea Research Institute of Chemical Technology, Korea High Tech Textile Research Institute, Archrom Pages/Total page pp.10 ~ 23 / 14 Language Korean Abstract In order to synthesize the dye suitable for supercritical carbon dioxide(ScCO2) dyeing, a series of azo based disperse dyes were prepared using various aniline derivatives as diazo components and indol derivatives as coupling components. Dyeing process in ScCO2 of the synthesized dyes was performed on PET fiber at 120℃ for 2 hrs under 250bar pressure with 0.5% o.w.f. of dye concentration. The absorption maxima varied from 400 to 580nm depending on the substituted groups in aniline derivatives and the indol derivatives. The dyes showed high molar extinction coefficients(ε) of 27,000~61,000M-1cm-1. Dyed PET fiber exhibited excellent brightness and good light, washing and perspiration(acid/alkali) fastness properties. Keywords azo based disperse dyes, supercritical carbon dioxide, polyester, dyeing, fastness Download   Reference http://koreascience.or.kr/journal/OSGGBT.page?&lang=ko