Black reactive dye composition

Abstract

The invention discloses a black reactive dye composition which is prepared as follows: step 1, synthesizing C.1.reactive black 5; step two, synthesizing an orange mixture component; step three, directly mixing 150g of the reactive black 5, 45g of the orange mixture and 20 g of anhydrous sodium sulphate with dry mixing equipment to obtain a black dye mixture by full and even mixing, or, by measurement of the liquid dye solid content, taking a liquid dye amounting to the 150g of the reactive black 5 and a liquid dye amounting to the 45g of the reactive orange mixture to fully and evenly mix in liquid mixing equipment, and then obtaining the black dye composition by spray drying; step four, according to the weight ratio of C.1. reactive black 5 to reactive orange mixture of (25-75): (75-25), choosing different ratios to process black dye compositions with different color-light levels; and step five, preparing the mixed product in the step 3 into 100ml of a 10g / L dye liquid, continuously pad dyeing a 10cm * 10m long-strip shaped fabric under the same conditions, and after processing of the pad-dyed fabric, using a color photometer for color measurement in every 0.5m.

Description

technical field [0001] The invention relates to a black reactive dye composition. Background technique [0002] Black reactive dyes, especially C.1. Reactive Black 5, are currently widely used in the world and have a large output. The λmax of C.1. Reactive Black 5 is between 590-600mm, and it is actually a navy blue dye. The blackness is not enough, so to achieve deep black, at present, both at home and abroad use C.1. Reactive Black 5 as the basis, and use compounding technology to obtain it. Not only is the cost high, but the production process is relatively complicated. Contents of the invention [0003] The invention provides a black reactive dye composition, which has high dyeing uptake, good solubility and excellent application performance, which not only meets the requirements of pad printing, but also overcomes the problems of head and tail color difference in the printing and dyeing process. [0004] The present invention has adopted following technical scheme: a...

AI Technical Summary

Problems solved by technology

[0002] Black reactive dyes, especially C.1. Reactive Black 5, are currently widely used in the world and have a large output. The λmax of C.1. Reactive Black 5 is between 590-600mm, and it is actually a navy blue dye. The blackness is not enough, so to achieve deep black, at present, both at home and abroad are based on C.1. Reactive Black 5, using compounding technology to obtain, not only the cost is high, but also the production process is relatively complicated