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Process for preparing nano disperse blue 2BLN dye by reprecipitation-homogenization method

A technology of dispersing blue and reprecipitating, applied in the direction of organic dyes, etc., can solve the problems of wide particle size distribution, irregular particle shape, large particle size, etc., and achieve the effect of easy industrialization, low equipment requirements, and simple preparation process

Active Publication Date: 2006-10-11
浙江长征化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disperse dyes produced by the traditional grinding process have the characteristics of large particle size, wide distribution range of particle size, irregular particle shape, spherical, diamond, needle and cylindrical, and unclear crystal form, so they are stable in dispersibility and high temperature dispersion. There is a large gap in the performance and dyeing rate. Generally, the loss rate is 10-30%, and it is as high as 50% in severe cases, which seriously affects the application performance of the product.

Method used

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  • Process for preparing nano disperse blue 2BLN dye by reprecipitation-homogenization method
  • Process for preparing nano disperse blue 2BLN dye by reprecipitation-homogenization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Put 50 g of Disperse Blue 2BLN filter cake, ethanol, and dispersant AS-3 in a weight ratio of 1:2:0.5 into a ball mill for ball milling for 5 hours to obtain a uniform and stable emulsion. Add 20g of dispersant AS-3 to 120g of water. Under the condition of high-speed ball milling, the ball milling medium is zirconia beads of φ1~3mm. Slowly add 75g of the prepared emulsion dropwise, and continue ball milling for 8 hours after dropping. The obtained dye liquid was finally subjected to high-pressure homogenization circulation for 3 times, and the homogenization pressure was 1200 bar, and finally a nano-scale disperse blue 2BLN dye liquid was obtained. After testing the average particle size of the dye solution (D 50 ) is 70nm, 90% particle size (D 90 ) is 98nm.

Embodiment 2

[0025] Put 50 g of Disperse Blue 2BLN filter cake, composite solvent (ethanol: ethylene glycol 4: 1), and dispersant AS-3 in a weight ratio of 1: 1: 0.5 into a ball mill for ball milling for 3 hours to obtain a uniform and stable emulsion. Add 20g of dispersant AS-3 to 120g of water. Under the condition of high-speed ball milling, the ball milling medium is quartz sand of φ1~3mm. Slowly add 150g of the prepared emulsion, and continue ball milling for 6 hours after dripping. The obtained dye liquid was finally subjected to high-pressure homogenization circulation for 3 times, and the homogenization pressure was 1200 bar, and finally a nano-scale disperse blue 2BLN dye liquid was obtained. After testing the average particle size of the dye solution (D 50 ) is 75nm, 90% particle size (D 90 ) is 97nm.

Embodiment 3

[0027] Put 50 g of Disperse Blue 2BLN filter cake, composite solvent (ethanol: ethylene glycol 3.5: 1), and dispersant Reax-85A in a weight ratio of 1: 1: 0.5 into a ball mill for 5 hours to obtain a uniform and stable emulsion. Add 20g of dispersant Reax-85A to 120g of water. Under the condition of high-speed ball milling, the ball milling medium is glass beads of φ1~3mm. Slowly add 120g of the prepared emulsion dropwise, and continue ball milling for 6 hours after dropping. The obtained dye liquid was finally subjected to high-pressure homogenization circulation for 6 times, and the homogenization pressure was 1200 bar, and finally a nanoscale disperse blue 2BLN dye liquid was obtained. After testing the average particle size of the dye solution (D 50 ) is 72nm, 90% particle size (D 90 ) is 94nm.

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Abstract

The invention discloses a technology for preparation of nano-disperse blue 2BLN dye with deposition-homogeneity method, which includes: milling disperse blue 2BLN dye dust cake, dissolvant and dispersing agent to obtain the emulsion, slowly dripping the emulsion into the aqueous solution of the dispersing agent which is strongly milled in the mill medium, after the strong mill, performing high-pressure homogenization treatment to the said disperse dye liquor to obtain the nano-disperse blue 2BLN liquid dye. The mean particle diameter of the said dye liquor is about 70nm and the D90 is less than 100nm, and the stabilization performance of the liquor can not change when placed for 2 months at a normal temperature. Compared with the crafts such as microemulsion and laser emission, the process of this invention is of stable product quality, short process flow, simple operation and low requirement for the equipment, so is suitable for industrialization.

Description

technical field [0001] The invention relates to a preparation process of disperse dyes, in particular to a preparation process of nanoscale disperse blue 2BLN dye. Background technique [0002] The size of the dye particles and their distribution have a great influence on the dyeing properties. Especially with the continuous development of polyester printing and dyeing technology and the emergence of ultra-fine denier fibers, the particle size requirements for disperse dyes are getting higher and higher. At present, the particle size processing of disperse dyes mainly depends on ball milling or sand milling. The disperse dyes produced by the traditional grinding process have the characteristics of large particle size, wide distribution range of particle size, irregular particle shape, spherical, diamond, needle and cylindrical, and unclear crystal form, so they are stable in dispersibility and high temperature dispersion. There is a large gap in the performance and dyeing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/40C09B67/04
Inventor 高建荣贾建洪赵国生盛卫坚沈卫庆
Owner 浙江长征化工有限公司
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