The stability of monochlorotriazinyl reactive dyes on cellulose films in aqueous alkaline solutions containing peroxide bleaching agents

• Published in: Dyes and pigments Vol. 50; no. 3; pp. 223 - 241
• Main Authors: Sugane, Akimi, Watanabe, Aki, Okada, Yasuyo, Morita, Zenzo
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.09.2001; Elsevier
• Subjects: Alkaline hydrolysis of dye–fibre bond; Applied sciences; Chemical industry and chemicals; Difluoromonochloropyrimidinyl reactive dye; Dye loss mechanism of reactive dyes from cellulose; Dyes, pigments; Exact sciences and technology; Fibers and threads; Forms of application and semi-finished materials; Industrial chemicals; Monochlorotriazinyl reactive dye; Polymer industry, paints, wood; Sodium peroxoborate; Technology of polymers; Sodium peroxoborate; Dye loss mechanism of reactive dyes from cellulose; Difluoromonochloropyrimidinyl reactive dye; Monochlorotriazinyl reactive dye; Alkaline hydrolysis of dye–fibre bond; Stability; Basic solution; Blue; Cellulose; Orange; Red; Resistance; Dyeing; Bleaching; Yellow; Chlorine Organic compounds; Natural fiber; Sodium Peroxoborates; Reactive dye; Triazine derivatives; Dyeability; Peroxides; Aqueous solution; Textile fiber
• ISSN: 0143-7208; 1873-3743
• DOI: 10.1016/S0143-7208(01)00053-5

The stability of seven reactive (one difluoromonochloropyrimidinyl and six monochlorotriazinyl) dyes on cellulose immersed in sodium peroxoborate (PB) solution (UK–TO solution) containing tetraacetylethylenediamine (TAED) was examined using cellulosic films at 60 °C. The extent of dye loss that occurred from the dyed cellulosic films which were immersed in the UK–TO solution without detergent correlated closely to the ratings obtained using the BS 1006 UK–TO wash test. The dye loss that occurred from the dyed cellophane films was attributed to three contributions, namely, alkaline hydrolysis of dye–fibre bonds, oxidative fading of the dye chromophore by peroxides and cellulose degradation accelerated by PB and TAED. The alkaline hydrolysis of the dye–fibre bond and the extent of cellulose degradation in the UK–TO solution were the main contributions to the dye loss; dye oxidation was a minor factor in the dye loss mechanism. The physical bonding of the dye molecules reinforced the covalent dye–fibre bond stability towards the UK–TO solution.