Dark blue vat dye with high fastness to chlorine bleaching and high fastness to hot pressing for tooling

Abstract

The invention relates to a dark blue vat dye with high fastness to chlorine bleaching and high fastness to hot pressing for tooling. The dye comprises the following components in weight percentage: 12-16% of a dye monomer A, 18-22% of a dye monomer B, 1-5% of a dye monomer C, 60-64% of a dispersing agent and 0-2% of dustproof oil. The fastness to chlorine bleaching of the dark blue vat dye for the tooling can reach grade 4-5 and the fastness to hot pressing thereof can reach grade 4-5 according to the national standard; in addition, dry fastness to rubbing of the dye is grade 4-5 and wet fastness to rubbing thereof is grade 3-4, thus fully meeting high requirements for performances of tooling series of products.

Description

technical field [0001] The invention relates to a dark blue dye, in particular to a dark blue vat dye (vat dark blue W-NBS) which is specially used for tooling, has 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 facing higher requirements for chlorine bleaching fastness and heat pressing fastness. At the same time, the European and American markets also have high requirements for the color fastness of polyester-cotton tooling fabrics. ,...

AI Technical Summary

Problems solved by technology

Generally vat dyes have good fastness to chlorine bleaching, for example, red F3B, yellow G, brilliant green FFB, purple 2R, etc. have high chlorine bleaching fastness, but the more commonly used vat dyes are vat navy blue, vat dark blue, brilliant blue, etc. Dyes have low chlorine bleaching fastness, 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 process of dyeing, dyed objects are easily damaged when they encounter available chlorine. However, the color is darkened and the cloth surface is blackened, and the chlorine bleaching fastness is only grade 1, and the quality is seriously damaged.

In addition, the hot pressing fastness is also difficult to meet the needs of working products. Therefore, the original products can no longer meet the increasing customer requirements, and there is an urgent need for a dark blue product with high chlorine bleaching resistance and high hot pressing fastness to meet market needs

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