A kind of high-performance navy blue reactive dye composition and its application

Abstract

The invention discloses a high-performance navy blue reactive dye composition and application thereof, and belongs to the technical field of reactive dyes. The high-performance navy blue reactive dyecomposition is prepared by mixing 46-53 wt% of a compound as shown in the general structural formula (I), 43-49 wt% of a compound as shown in the general formula (II) and 2-5 wt% of a compound as shown in the general formula (III). The preparation of the compound as shown in the general formula (I) comprises the steps of diazotization reaction and coupling reaction; the preparation of the compoundas shown in the general formula (II) comprises the steps of chromophore preparation and double condensation reaction; and the preparation of the compound as shown in the general formula (III) comprises steps of double condensation reaction, diazotization reaction and coupling reaction. When the dye composition is applied, the dye composition is mixed with a dispersing agent, a dust-proof agent and anhydrous sodium sulphate to prepare a commercial dye, which is applied to dyeing and printing of rayon fabric. The navy blue reactive dye composition has high fixation rate, good stability and excellent process tolerance; and the structure of a spray drying device used in the preparation method is optimized and the application value is high.

Description

technical field [0001] The invention relates to the technical field of reactive dyes, in particular to a high-performance navy blue reactive dye composition and its application. Background technique [0002] Navy blue reactive dye is an important kind of reactive dye, widely used in the dyeing of cotton, wool and other fabrics. Navy blue reactive dyes usually have a single-structure disazo reactive dye and a blended reactive dye composition based on blue dyes. For example, the reactive dye Delongsu Navy G for wool is based on H acid (1-amino-8- Naphthol-3,6-disulfonic acid) is the coupling component, and the reaction product of bromoacryloyl chloride and sodium 2,4-diaminobenzenesulfonate is a disazo reactive dye of the diazo component, and its general structural formula is : [0003] [0004] However, due to the structure-determined nature, it is difficult for a navy blue dye with a single structure to regulate and meet market demand in terms of solubility, shade, hue,...

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Problems solved by technology

[0004] However, due to the structure-determined nature, it is difficult for a navy blue dye with a single structure to regulate and meet market demand in terms of solubility, shade, hue, and fastness performance. Therefore, navy blue reactive dyes obtained by blending blue reactive dyes with other reactive dyes Dye mixtures are constantly being developed and marketed for their good applied color and application properties

Patent CN102115614 has reported a navy blue reactive dye composition and its dyeing application on fibers. The dye is composed of formazan (Formazan) dyes containing copper metal and disazo with H acid as the coupling component. The rubbing fastness is good, but the color fixation rate of this type of navy blue reactive dye is not high, usually lower than 73%, and this type of dye contains heavy metal elements, so there is a risk of heavy metal pollution

[0005] In recent years, with the requirements of energy saving, emission reduction and pollution reduction in the dye and printing and dyeing industries, higher requirements have been put forward for the performance of reactive dyes, especially the stability and color fixation rate. However, the navy blue reactive dyes currently on the market such as P2R , PBS, SPE, etc. are difficult to meet the requirements, therefore, the development of navy blue reactive dyes with good stability and high color fixation rate is imminent

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