High washing fastness dispersed black dye for polyester/polyurethane fabric

Abstract

The invention relates to a disperse blue black dye with a high color fastness to washing used for polyester and spandex fabrics. The dye consists of a C.I. disperse blue 284, a C.I. disperse blue 60, a C.I. disperse blue 165, a C.I. disperse red 311, a C.I. disperse orange 19, sodium lignosulphonate and dust laying oil; the weight percentage thereof is as follows: 12 to 18 percent of C.I. disperse blue 284, 6 to 9 percent of C.I. disperse blue 60, 8 to 12 percent of C.I. disperse blue 165, 3 to 5 percent of C.I. disperse blue red 311, 7 to 11 percent of C.I. disperse orange 19, 50 to 55.5 percent of sodium lignosulphonate as well as 0.2 to 1 percent of dust laying oil. The disperse blue black dye has the beneficial effects of being capable of coloring the mixed polyester and spandex fabrics into dark black and simultaneously having a quite high color fastness to washing.

Description

technical field [0001] The invention relates to a black dye, in particular to a black dye used for polyester-spandex fabrics. Background technique [0002] The main chemical composition of polyurethane fiber (commonly known as spandex) is polyurethane, and it is a block copolymer composed of so-called soft segments and hard segments. It is a kind of fiber with good elasticity with "segment" structure. The hard segment is formed by the reaction of isocyanate and diamine compound, and the soft segment is composed of long-chain dihydroxy compound (polyether diol or polyester diol). Soft, the melting point is generally below 50 ° C, the glass transition temperature is generally -50 ~ -70 ° C (polyether type) and 25 ~ 45 ° C (polyester type), different products also introduce different components into the molecular chain, to Improve various properties of fibers. It is often blended with polyester, cotton and other fibers to obtain elastic fabrics. [0003] In the prior art, po...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, polyurethane fiber dyeing is only suitable for disperse and neutral dyes, and the dyes mainly enter the soft segment region of the amorphous structure. Although the dyeing temperature is low, the dyeing rate is not high, and the dyes are easy to desorb, and the color fastness is very high. Difference