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A kind of disperse dye slurry that effectively slows down precipitation and its preparation method

A technology for disperse dyes and sizing, applied in organic dyes, dyeing methods, textiles and papermaking, etc., can solve the problems of difficulty in uniform dispersion of dye particles, larger particles, and decreased stability of dye colloidal suspensions, and improve storage stability. The effect of reducing the average particle size and the excellent dyeing and finishing fastness

Active Publication Date: 2018-12-11
ZHEJIANG DIBANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the dyes are obviously aggregated, the particles are obviously larger, and the average particle size is also greatly improved, which makes the stability of the dye colloidal suspension drop, and it is difficult for the dye particles to disperse evenly in the solution

Method used

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  • A kind of disperse dye slurry that effectively slows down precipitation and its preparation method
  • A kind of disperse dye slurry that effectively slows down precipitation and its preparation method
  • A kind of disperse dye slurry that effectively slows down precipitation and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0056] Without adding urea, after selecting disperse dyes and dispersants for grinding, adjust them into finished disperse dye slurry. The experimental data are according to Table 1:

[0057] Table 1

[0058]

[0059] Precipitation effect detection

[0060] After the disperse dye slurry prepared in the above-mentioned Examples 1-3 was left to stand for a certain period of time, the sedimentation degree was tested according to the method described above, and the results are shown in Table 2:

[0061] Table 2

[0062] Example

[0063] From the test results in Table 2, it can be seen that the amount of dispersant has a significant effect on the precipitation rate of disperse dye slurry. With the increase of the amount of dispersant, the degree of precipitation decreases, and the precipitation of the slurry obviously slows down. Moreover, the disperse dye slurry has a fast precipitation rate within a week of standing, and the precipitation is basically complete afte...

Embodiment 4～9

[0065] Without adding urea, after selecting disperse dyes and dispersants for grinding, adjust the pH value of the slurry with phosphoric acid to make finished disperse dye slurry. The experimental data are according to Table 3:

[0066] table 3

[0067]

[0068] Precipitation effect detection

[0069] After the disperse dye slurry prepared in the above-mentioned Examples 4-9 was left to stand for a certain period of time, the sedimentation degree was tested according to the method described above, and the results are shown in Table 4:

[0070] Table 4

[0071] Example

[0072] The pH value of the finished disperse dye slurry is generally 7 to 8. Too high or too low will affect the storage performance and use performance of the slurry. It can be seen from the sedimentation test results in Table 4 that the disperse dye slurry with different pH values There is little difference in the precipitation speed of the materials, and within the first week, nearly half of ...

Embodiment 10～17

[0074] After the disperse dye, dispersant, and urea are mixed and ground, the finished disperse dye slurry is prepared. The experimental data is according to Table 5:

[0075] table 5

[0076]

[0077]

[0078] Precipitation effect detection

[0079] After the disperse dye slurry prepared in the above-mentioned Examples 10-17 was left to stand for a certain period of time, the sedimentation degree was tested according to the method described above, and the results are shown in Table 6:

[0080] Table 6

[0081] Example

Sedimentation % / 7 days

Sedimentation % / 30 days

Sedimentation % / 60 days

10

43.83

79.85

86.04

11

39.89

78.96

85.81

12

35.41

77.65

85.13

13

26.21

76.96

84.8

14

25.13

71.22

82.27

15

21.37

64.66

79.12

16

7.85

46.83

76.42

17

6.58

40.16

75.18

[0082] It can be seen from the test results of the precipitation degree in...

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Abstract

The invention discloses a disperse dye paste capable of effectively retarding precipitation. The disperse dye paste is characterized by comprising urea with a weight of 0.05 to 0.5 time of the total weight of a disperse dye component, and a dispersant with a weight of 0.6 to 6 times of the total weight of the disperse dye component, wherein the disperse dye component is one or more selected from compounds as shown in a formula in the specification. In the formula, R1 is H or -NO2; R2 and R3 are selected from the group consisting of H, or -Cl, -Br, -CN, -CF3, -NO2 and -COOR8; R4 and R5 are selected from the group consisting of H, or alkyl, alkoxy and -NHCOR9; R6 and R7 are selected from the group consisting of alkyl, alkoxy, or alkyl or alkoxy with an H substituted by -OH, -CN or -Ph; and R8 and R9 are alkyl. The disperse dye provided by the invention is a liquid dye, and has high dyeing rate, good deep dyeing properties and excellent dyeing fastness; and compared with an ordinary commercial disperse dye paste, the disperse dye paste provided by the invention has the following advantages: the aggregation and precipitation rate of dye particles is significantly reduced, and better storage stability is obtained.

Description

technical field [0001] The invention belongs to the technical field of dye synthesis, and in particular relates to a disperse dye slurry which can effectively slow down precipitation and a preparation method. Background technique [0002] As the output of synthetic fibers increases year by year, disperse dyes are currently one of the most rapidly developing dyes. At present, the finished products of disperse dyes mainly come in two forms: dry powder and liquid slurry, and liquid slurry has limited its wide-scale application and promotion due to problems such as high transportation cost and easy deterioration of slurry. [0003] The main reasons why the liquid finished product slurry of disperse dyes are easy to deteriorate after storage are as follows: [0004] First of all, during the placement process, the dye will become mildewed or deteriorated, the dye or the surface of the dye will be oxidized, the molecular structure of the dye will change, and thus the shade of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B67/38C09B67/10C09B67/04D06P1/18
Inventor 徐万福傅伟松周乃锋唐智勇陈华祥叶勤刚
Owner ZHEJIANG DIBANG CHEM
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