Disperse yellow dye mixture resistant to light and acid-base and improved in sublimation fastness

Abstract

A disperse yellow dye mixture resistant to light and acid-base and improved in sublimation fastness is formed by mixing a dye part and an auxiliary part, wherein the dye part is composed of two dyes in the following mass percentage contents: (1) 50-85% dye in accordance with a chemical general formula (I), wherein R in the formula (I) represents hydrogen or an alkyl having less than or equal to 4 carbon atoms; and (2) 15-50% dye in accordance with a chemical structural formula (II).

Description

technical field [0001] The invention relates to a disperse dye suitable for dyeing polyester fibers or fabrics. In particular, it relates to a disperse yellow dye mixture whose sublimation fastness to light and acid and alkali is improved to grade 3.5. This disperse yellow dye can be used as one of the basic three primary colors. It forms a group of three primary color dyes with other disperse red and disperse blue with the same light resistance, acid and alkali resistance and sublimation fastness for color matching. When dyeing fibers and fabrics, it solves the problem of color change of polyester fibers or fabric clothing under sunlight due to the performance defects of the dye itself, and also solves the problem of color deviation during dyeing and processing, and also solves the problem of sublimation fastness due to dye formulations. Inconsistencies leading to severe shade changes during heat setting finishing. In addition, this disperse yellow dye mixture can be used d...

AI Technical Summary

Problems solved by technology

[0005] In the long-term practice of fabric printing and dyeing, the inventor has noticed that the ternary color dyes used in the dyeing of polyester fibers and fabrics in the past have the defects of poor light fastness, poor acid and alkali resistance and inconsistent sublimation fastness.

For example, a ternary color dye with disperse blue 2BLN (C.I. disperse blue 56), disperse yellow E-RG (a mixture of C.I. disperse yellow 54 + C.I. disperse orange 25), and disperse red 3B (C.I. disperse red 60), The light fastness is tested according to the European standard. After 48 hours of exposure, both Disperse Blue 2BLN and Disperse Red 3B can reach level 4, while Disperse Yellow E-RG can only reach level 2.5-3; the pH value of Disperse Blue 2BLN is suitable for 3-8, the pH range of Disperse Yellow E-RG value is 3-8, and the pH range of Disperse Red 3B is 3-8; the sublimation fastness is tested according to national standards (180 degrees, 2kg pressure, hot pressing for 30 seconds), Disperse blue 2BLN is grade 3.5, disperse yellow E-RG is grade 2, and disperse red 3B is grade 3. This will lead to serious color changes due to differences in dye sublimation fastness during heat setting after dyeing of medium and light colors, resulting in dyeing The quality of the finished product decreases, affecting the quality of the finished product