Effect Of Opticallyactive Compounds On The Fastness To Light Of Anthraquinone Blue Dye

Reactive dyes is widely used in dyeing of cellulose fibers because of its bright color,excellent dyeing properties and high crocking and washing color fastness, etc. But there are also some problems like poor light fastness, less kinds of dyes with high light fastness etc.Anthraquinone blue dye has high color fastness, but it still cannot meet the requirements of high-grade fabrics on the color fastness to light. Therefore, study on light fading mechanism of reactive dyes and how to improve the light fastness of dyes to obtain dyes with high light fastness have very important significance.In this paper, we discuss three questions. 1. The relationship between seven light fastness agent and sixteen of reactive dyes with different structures and hue in light fastness and anti UV properties; 2. The relationship between four kinds of UV absorbing compounds and anthraquinone blue dye lightfastness in anti UV properties and dyeing of fabrics with thermal stability of ring; 3. On the basis of the above research, explore the relationship between hydroxyl radical(OH·) and reactive dyes photofading.The research results are as following:1. After finishing by seven kinds of light fastness improver, the fabric’s anti UV properties have been greatly improved, but have different effect on light fastness; Each agent has a certain range of applications.: JYK-132 can improve 0.5~1.5 level; W-51 N is suitable for most dyes, it can improve 1~2 level; AAA has a certain role in promoting the fastness of tricolor, but the application scope is narrow; CN-123 is suitable for yellow single azo dyes; SUNFIX is suitable for phthalocyanine type, formazan, three benzene two oxazine type structure of blue dye and red monoazo dyes; ZNA10 only has an effect on the yellow dye; YZ-431 can improve 0.5~1.5 level.2. The color fastness to light of dyed fabrics after finished by optically active compounds including UV-531, UV-327, BPTCD, TBS, increased 1~2 level, 3,3 ’, 4,4’-benzophenone tetracarboxylic dianhydride BPTCD has benzophenone structure like UV-531, withthe increaseing of the amount, light fastness decreased 1~3 level.3. The fabric finishes by UV-531 produce less OH· than those without finished, the fabric finishes by BPTCD produce more OH· than those without finished, the dye itself can also produce OH·. UV-531 does not produce OH· under the UV lamp, while BPTCD will produce a large amount of OH·. The results indicated that OH· may be a factor in fabric dyeing light fading.