Frock black vat dye with high fastness to chlorine bleaching and hot pressing

Abstract

The invention relates to a flock black vat dye with high fastness to chlorine bleaching and hot pressing. The dye comprises the following components in percentage by weight: 32 to 36 percent of dye monomer A, 22 to 26 percent of dye monomer B, 2 to 6 percent of dye monomer C, 1 to 3 percent of dye monomer D, 30 to 40 percent of dispersing agent, and 0 to 2 percent of dust laying oil. According tothe national standard, the fastness to chlorine bleaching of the black vat dye provided by the invention can reach 4 to 5 grade, the fastness to hot pressing can reach 4 to 5 grade; moreover, dry rubbing fastness of the dye reaches 4 to 5 grade and wet rubbing fastness reaches 3 to 4 grade; and the dye has high build up property and high blackening and fully meets the requirements on performance of high-requirement frock products.

Description

technical field [0001] The invention relates to a black dye, in particular to a black vat dye (reduced direct black W-RBH) for tooling with high chlorine bleaching resistance and high heat-pressing fastness. Background technique [0002] Vat dyes are a class of high-grade dyes with many varieties, bright colors and excellent fastness. Due to their excellent light fastness, weather resistance, heat resistance, solvent resistance and wash resistance, vat dyes can be widely used in cotton, wool and silk. The printing and dyeing of cotton, linen, synthetic fibers and their blended fabrics and interwoven fabrics is a high-grade product in cotton dyes. [0003] In recent years, with the development of society, tooling products are faced with the improvement of requirements for chlorine bleaching fastness, heat-pressing fastness, jet blackness, etc. At the same time, the European and American markets also have very high requirements for the color fastness of polyester-cotton toolin...

AI Technical Summary

Problems solved by technology

Generally, vat dyes have good fastness to chlorine bleaching, for example, red F3B, yellow G, bright green FFB, purple 2R, etc. have high chlorine bleaching fastness, but the more common dyes such as reduced direct black RB and other dyes, chlorine The bleaching fastness and hot-pressing fastness are low, and it is difficult to meet the requirements of various indicators, especially for products for export, it is even more difficult to meet the requirements, and in the dyeing process, the dyed product is easily damaged when it encounters available chlorine , and make the color darker and the cloth surface black

Therefore, the original products have been unable to meet the increasing customer requirements, and there is an urgent need for a black product with high chlorine bleaching resistance and high hot-pressing fastness to meet market needs.

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