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Hydroxypropyl carboxymethyl waxy corn starch acid dye printing paste and preparation method

A technology of hydroxypropyl carboxymethyl wax and waxy cornstarch, which is applied in dyeing, textiles and papermaking, can solve the problems of complex process, low reaction efficiency and high cost, and achieve good solubility, high transparency, Easy to inflate effect

Inactive Publication Date: 2015-08-12
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a preparation of hydroxypropyl carboxymethyl waxy cornstarch acid dye printing paste in view of the defects of low reaction efficiency, complicated process and high cost in the preparation of acid dye printing paste in the prior art Method, using the solvent method, the waxy corn starch is compounded and modified, the cold water solubility, the paste fluidity and the mesh penetration are all good, and the transparency is high, which meets the requirements of the acid dye printing paste

Method used

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  • Hydroxypropyl carboxymethyl waxy corn starch acid dye printing paste and preparation method

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Embodiment 1

[0019] The preparation method of the hydroxypropyl carboxymethyl waxy corn starch acid dye printing paste of the present embodiment, the steps are as follows:

[0020] (1) Add 95g of waxy cornstarch to 190mL of 70% ethanol aqueous solution, stir until the waxy cornstarch is evenly dispersed in the ethanol aqueous solution, then add 4g of sodium hydroxide, and alkalize at 20°C React for 35 minutes;

[0021] (2) Add 20g of propylene oxide after the alkalization reaction is completed, stir evenly and then raise the temperature to 60°C for etherification reaction for 10h;

[0022] (3) After the etherification reaction, cool down to 45°C, then add 14g of chloroacetic acid, stir evenly, then raise the temperature to 65°C for 3 hours;

[0023] (4) After the reaction, cool down to 25°C, adjust the pH value of the reaction system to neutral with hydrochloric acid, wash, filter with suction, dry at 80°C, and pulverize to obtain hydroxypropyl carboxymethyl waxy corn starch and apply it ...

Embodiment 2

[0025] A hydroxypropyl carboxymethyl waxy corn starch acid dye printing paste is characterized in that it is made of the following raw materials in parts by weight: 95-105 parts of waxy corn starch, ~210 parts of ethanol aqueous solution, 4~8 parts of sodium hydroxide, 20~25 parts of propylene oxide, 14~21 parts of chloroacetic acid; the hydroxypropyl substitution degree of the described hydroxypropyl carboxymethyl corn starch acid dye printing paste is 0.30~0.40, The carboxymethyl substitution degree is 0.2~0.3.

[0026] The preparation method of the hydroxypropyl carboxymethyl corn starch acid dye printing paste of the present embodiment, the steps are as follows:

[0027] (1) Add 100g of waxy cornstarch to 200mL of 80% ethanol aqueous solution, stir until the waxy cornstarch is evenly dispersed in the ethanol aqueous solution, then add 6g of sodium hydroxide, and alkalize at 25°C React for 30 minutes;

[0028] (2) Add 22g of propylene oxide after the alkalization reaction...

Embodiment 3

[0032] The preparation method of the hydroxypropyl carboxymethyl corn starch acid dye printing paste of the present embodiment, the steps are as follows:

[0033] (1) Add 105g of waxy cornstarch to 210mL of 95% ethanol aqueous solution, stir until the waxy cornstarch is evenly dispersed in the ethanol aqueous solution, then add 8g of sodium hydroxide, and alkalize at 30°C React for 25 minutes;

[0034] (2) Add 25g of propylene oxide after the alkalization reaction, stir evenly and then raise the temperature to 75°C for etherification reaction for 8 hours;

[0035] (3) After the etherification reaction, cool down to 55°C, then add 21g of chloroacetic acid, stir evenly, then raise the temperature to 75°C for 2 hours;

[0036] (4) After the reaction, cool down to 35°C, adjust the pH value of the reaction system to neutral with hydrochloric acid, wash, filter with suction, dry at 80°C, and pulverize to obtain hydroxypropyl carboxymethyl waxy corn starch acid dye printing paste m...

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Abstract

The invention discloses a hydroxypropyl carboxymethyl waxy corn starch acid dye printing paste which is prepared from the following raw materials, by weight, 95-105 parts of waxy corn starch, 190-210 parts of an ethanol aqueous solution, 4-8 parts of sodium hydroxide, 20-25 parts of epoxypropane and 14-21 parts of chloroacetic acid. A preparation method of the paste comprises the following steps: uniformly dissolving waxy corn starch in the ethanol aqueous solution, and carrying out an alkalization reaction by adding sodium hydroxide; carrying out an etherification reaction by adding epoxypropane after the alkalization reaction is finished; adding chloroacetic acid after the etherification reaction is finished, heating to 65-75 DEG C and reacting for 2-3 h; cooling to 25-35 DEG C after the reaction is finished, adjusting pH value of the reaction system to neutral by using hydrochloric acid, washing, carrying out suction filtration, drying at 80 DEG C, and crushing to obtain the product. When used in acid dye printing, the product has high tinctorial yield, good contour sharpness and high de-paste ratio. The acid dye printing paste provided by the invention can be used in acid dye printing, is biodegradable and meets requirements of eco-environmental protection.

Description

technical field [0001] The invention belongs to the technical field of preparation of acid dye printing paste, in particular to a solvent method for preparing hydroxypropyl carboxymethyl waxy corn starch acid dye printing paste. Background technique [0002] When printing with acid dyes, the paste is required to have good acid and alkali resistance, and the commonly used pastes of sodium alginate, carboxymethyl cellulose, and carboxymethyl starch are all anionic pastes, which have poor acid and alkali resistance. When the pH value is low, -COONa in the molecule is transformed into -COOH, resulting in a decrease in its viscosity and a gel phenomenon. In addition, pastes such as sodium alginate are not resistant to the action of calcium and magnesium ions, and most of the mordants used in some acid mordant dyes contain heavy metal ions. Traditional acid dye printing pastes are mainly based on guar gum and its derivatives. In recent years, due to the impact of supply and deman...

Claims

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Application Information

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IPC IPC(8): D06P1/48D06P1/39
Inventor 武宗文刘宏臣尹振华李俊礼周培文刘辉周伟涛
Owner ZHONGYUAN ENGINEERING COLLEGE
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