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Reactive dye-white discharge printing paste and preparation method thereof

A technology for reactive dyes and printing paste, which is applied in dyeing, textile and papermaking, etc., can solve the problems of poor resistance to whitening agents, not enough environmental protection, and hindering the popularization and application of reactive dyes for whitening printing.

Active Publication Date: 2012-08-01
LIAONING FIXED STAR FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Printing with these reactive dye whitening printing pastes mainly has the following three disadvantages: First, these reactive dye whitening printing pastes have poor whitening resistance. After the whitening agent is removed, it is easy to become thin, which affects the effect of whitening printing; second, these reactive dyes are easy to bleed during printing, making the outline of the printed part unclear, or interpenetrating with the adjacent printing paste, destroying the color of the flower. The third is that when diaobai powder or Degulin is used as the whitening agent, the product contains formaldehyde, which is not environmentally friendly, and the washing process after printing increases, which wastes energy.
The above shortcomings have hindered the popularization and application of reactive dye whitening printing

Method used

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  • Reactive dye-white discharge printing paste and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Take 190 grams of water, 75 grams of acrylic acid, 9 grams of acrylamide, and 57 grams of methacrylic acid, neutralize with 362 grams of ammonia water with a mass percentage concentration of 20-22%, and obtain a neutralization solution, which is pumped into No. 1 high-level tank and waits Use; 78 grams of 2-acrylamido-2-methylpropanesulfonic acid is pumped into No. 2 high-level tank for use;

[0025] (2) Add 174 grams of water to the reaction kettle, heat up to 73°C, add 0.7 grams of ammonium persulfate and 8 grams of water to prepare an ammonium persulfate aqueous solution, and heat up while stirring, when the temperature in the reaction kettle rises to 75-76°C At this time, start to add the neutralizing solution and 2-acrylamido-2-methylpropanesulfonic acid dropwise at the same time, keep the temperature at 76-78°C, finish adding in 3 hours to 4 hours, and start dropping 30 minutes before the end of the dropwise addition Add ammonium persulfate aqueous solution pr...

Embodiment 2

[0030] (1) Take 194 grams of water, 77 grams of acrylic acid, 9.5 grams of acrylamide, and 58 grams of methacrylic acid, and neutralize with 365 grams of ammonia water with a concentration of 20%-22% in mass percentage to obtain a neutralization solution, which is pumped into No. 1 high-level The tank is ready for use; 79 grams of 2-acrylamide-2-methylpropanesulfonic acid is pumped into the No. 2 high-level tank for use;

[0031] (2) Add 177 grams of water to the reaction kettle, raise the temperature to 73°C, and add an aqueous ammonium persulfate solution prepared by adding 0.74 grams of ammonium persulfate and 8 grams of water. Raise the temperature while stirring, when the temperature in the reactor rises to 75-76°C, start to drop the materials in the No. 1 high-level tank and No. Finish. 30 minutes before the end of the dropwise addition, start to drop the ammonium persulfate aqueous solution prepared by 0.6 grams of ammonium persulfate and 4 grams of water, and finish a...

Embodiment 3

[0036] (1) Take 197 grams of water, 79 grams of acrylic acid, 10.5 grams of acrylamide, and 60 grams of methacrylic acid, and neutralize with 370 grams of ammonia water with a concentration of 20%-22% in mass percentage to obtain a neutralization solution, which is pumped into No. 1 high-level The tank is ready for use; 81 grams of 2-acrylamide-2-methylpropanesulfonic acid is pumped into the No. 2 high-level tank for use;

[0037] (2) Add 180 grams of water to the reaction kettle, raise the temperature to 73°C, and add an aqueous ammonium persulfate solution prepared by adding 0.78 grams of ammonium persulfate and 9 grams of water. Raise the temperature while stirring, when the temperature in the reactor rises to 75-76°C, start to drop the materials in the No. 1 high-level tank and No. Finish. 30 minutes before the end of the dropwise addition, start to drop the ammonium persulfate aqueous solution prepared by 0.65 grams of ammonium persulfate and 5 grams of water, and finish...

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Abstract

The invention relates to a reactive dye--white discharge printing paste and a preparation method thereof. The white discharge printing paste comprises the following raw materials by weight: 75 to 80 parts of acrylic acid, 9 to 11 parts of acrylamide, 57 to 62 parts of methacrylic acid, 78 to 82 parts of 2-acrylamide-2-methylacrylsulfonate, 360 to 380 parts of 20 % ammonia, 3.5 to 4.0 parts of ammonium persulfate, 1.9 to 2.6 parts of sodium bisulfite, and 490 to 520 parts of water. The method comprises the following steps: polymerizing all the liquors, adding 114 to 118 parts of starch to the copolymer, pasting, and filtering. As thiourea dioxide is taken as a white discharge agent, a fabric is easy to wash with water after print discharging; and no methanal is left on the fabric, so as tobe more environment-friendly.

Description

technical field [0001] The invention relates to a reactive dye whitening printing paste and a preparation method thereof, which are used for whitening printing of reactive dyed cloth. Background technique [0002] Reactive dye whitening printing is to print the whitening paste with whitening agent on the dyed cloth of reactive dyes, and then dry and wash for a certain period of time, so that the ground color of the printing part disappears and becomes white. Pattern patterns. Through the white printing of reactive dyes, the printed products have a certain three-dimensional effect and increase the added value of the products. For whitening printing on the market, diaobai powder or Degulin are often used as whitening agents. The pastes for printing include white dextrin, modified guar gum, etc. The representative products on the market are Italian reactive dyes. White printing paste H-2 and domestic reactive dye-extracting white printing paste IM-325 products. But do not se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/44D06P1/52D06P1/48D06P1/38D06P5/15C08F220/58C08F220/06C08F220/56
Inventor 周明倪成涛董明东刘杰
Owner LIAONING FIXED STAR FINE CHEM
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