A kind of disperse dye composition and its preparation method and application

Abstract

The invention discloses a disperse dye composition and preparation and application methods thereof. The disperse dye composition is composed of a component A, a component B, a component C and a component D at a certain ratio, which are added with a certain quantity of additives. The prepared disperse dye composition has the same shade with C. I. disperse blue 56, and when applied to dyeing polyester and polyester blended fabric, has the advantages of being higher in washing fastness and sublimation fastness, better in built-up property, lower in price, safer and more environmentally friendly and accordingly can replace the C. I. disperse blue 56 for dyeing production of hydrophobic fabric, especially polyester.

Description

Technical field: [0001] The invention relates to a blue disperse dye composition and its preparation method and application, which is used to replace C.I. disperse blue 56, and is suitable for dyeing polyester fibers and blended fabrics thereof. Background technique: [0002] C.I. Disperse Blue 56, trade name Disperse Blue 2BLN, chemical name 1,5-diamino-2-chloro-4,8-dihydroxy-9,10-anthraquinone (see formula 1). This dye is an important part of the three primary colors of disperse dyes at low temperature. It has the advantages of bright shade, good level dyeing, low dyeing temperature, and good light fastness. It is one of the most widely used varieties of "blue anthraquinone" disperse dyes. The chemical structure of C.I. Disperse Blue 56 is shown in the following formula: [0003] [0004] However, the dye also has certain defects, which affect the actual use of the dye in production, as shown in: [0005] (1) Poor fastness. Due to the small molecular weight (365.18) ...

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Problems solved by technology

[0004] However, the dye also has certain defects, which affect the actual use of the dye in production, as shown in:

[0005] (1) Poor fastness

Due to the small molecular weight (365.18) and molecular volume of the dye, it is easier for the dye to enter the "instant hole" produced by the fiber. Therefore, the softening degree of the polyester fiber molecular chain is low during dyeing. Although it is beneficial to low temperature dyeing (at the dyeing temperature It can be dyed slowly after exceeding 50°C), but in turn, it will also cause poor washing fastness and sublimation fastness of the dye, because the dye belongs to the "easy in and easy out" type on polyester fibers;

[0006] (2) Low lifting force

[0007] (3) There are environmental problems in raw materials and production process

Although it has not affected its production and application in the short term, there is always a certain risk of whether it will restrict the use of anthraquinone in the long run, so there is uncertainty about whether it will indirectly affect the products and output of C.I. Disperse Blue 56

[0008] (4) High cost and serious price rise

Due to the complex production process of dyes and the high pressure of environmental protection in production, the production cost and market price of dyes are much higher than that of azo dyes of the same color system, which also limits the large-scale application in production.

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