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Preparation method and application of modified guar gum for preparing reactive printing paste

A technology of reactive printing and guar gum, used in dyeing, textiles and papermaking, etc., can solve the problems of hard hand feeling and low printing color yield, and achieve the effects of high grafting efficiency, high depaste rate and molecular weight reduction.

Inactive Publication Date: 2021-12-03
山东广浦生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the guar gum molecule contains a large number of active primary alcohol hydroxyl groups, which can easily react with reactive dyes, resulting in low color yield and hard hand feeling.

Method used

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  • Preparation method and application of modified guar gum for preparing reactive printing paste
  • Preparation method and application of modified guar gum for preparing reactive printing paste

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A preparation method for preparing modified guar gum for reactive printing paste, comprising the steps of:

[0025] 1) Alkalization reaction: Add aqueous sodium hydroxide solution to 100g of guar gum, and basify for 90min at 20°C to obtain an alkalization reaction solution; wherein, 20g of sodium hydroxide and 90g of water; aqueous solution of sodium hydroxide A mixture of tetramethylammonium chloride, tetramethylammonium bromide and tetraethylammonium chloride is added, and the quality of the mixture is 1g;

[0026] 2) Modification: Add sodium chloroacetate aqueous solution to the alkalization reaction solution obtained in step 1), etherify at 45°C for 300 minutes, then add bromododecane in acetone, and etherify at 45°C for 120 minutes , add hydrogen peroxide after the reaction, and oxidize and degrade at 45°C for 50 minutes to obtain a modified solution; wherein, the added amount of sodium chloroacetate is 10 g, and the quality of water is 50 g; the added amount of br...

Embodiment 2

[0029] A preparation method for preparing modified guar gum for reactive printing paste, comprising the steps of:

[0030] 1) Alkalization reaction: add potassium hydroxide aqueous solution to 100g guar gum, under the condition of 65 ℃, alkalization 30min, obtain alkalization reaction solution; Wherein, the add-on of potassium hydroxide is 45g, and the add-on of water is 60g, tetraethylammonium bromide, tetrabutylammonium chloride, tetrabutylammonium bromide, dodecyltrimethylammonium chloride, dodecyltrimethylammonium bromide are added to potassium hydroxide aqueous solution A mixture of ammonium, and the addition amount of the mixture is 0.01g;

[0031] 2) Modification: Add an aqueous solution of sodium 2-chloroethylsulfonate to the alkalization reaction solution obtained in step 1), etherify at 75°C for 30 minutes, then add bromotetradecane solution, After the etherification reaction was completed for 50 minutes, hydrogen peroxide was added and oxidatively degraded at 75°C ...

Embodiment 3

[0034] A preparation method for preparing modified guar gum for reactive printing paste, comprising the steps of:

[0035]1) Alkalization reaction: add sodium hydroxide aqueous solution to 100g guar gum, under the condition of 25 ℃, alkalization 80min, obtain alkalization reaction solution; Wherein, the add-on of sodium hydroxide is 23g, and the add-on of water is 70g, sodium hydroxide aqueous solution is added with tetradecyltrimethylammonium chloride, tetradecyltrimethylammonium bromide, hexadecyltrimethylammonium chloride, cetyltrimethylammonium bromide A mixture of ammonium, octadecyltrimethylammonium chloride, and octadecyltrimethylammonium bromide, and the addition amount of the mixture is 0.03g;

[0036] 2) Modification: Add an aqueous solution of 3-chloro-2-hydroxypropyl sulfonate sodium to the alkalization reaction solution obtained in step 1), etherify at 50°C for 70 minutes, and then add hexadecane bromide in acetone Solution, etherification reaction at 50°C for 70...

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Abstract

The invention discloses a preparation method of modified guar gum for preparing reactive printing paste. The preparation method comprises the following steps: weighing guar gum, adding an alkalizer aqueous solution into the guar gum, and alkalizing at 20-65 DEG C for 30-90 min to obtain an alkalized reaction solution; adding an anionic etherifying agent solution into the alkalized reaction solution, carrying out etherification reaction for 30-300 min at the temperature of 45-75 DEG C, then adding an alkylation etherifying agent solution, carrying out etherification reaction for 50-120 min at the temperature of 45-75 DEG C, after the reaction is finished, adding an oxidative degradation agent, and carrying out oxidative degradation for 10-50 min at the temperature of 45-75 DEG C to obtain a modified solution; and sequentially neutralizing, washing and post-treating the obtained modified solution to obtain the modified guar gum. The modified guar gum is applied to preparation of the reactive printing paste, so that the performance of the reactive printing paste is improved.

Description

technical field [0001] The invention relates to the technical field of printing pastes, in particular to a preparation method and application of modified guar gum for preparing active printing pastes. Background technique [0002] Printing paste refers to a polymer compound that can thicken the printing paste. Before printing paste is added to printing paste, it is generally dissolved in water or fully swollen and dispersed in water. When preparing printing paste, part of the dye is dissolved in water, and the other part is dissolved, adsorbed or dispersed in the original printing paste. Printing paste is the main component of printing paste, which determines the running performance of printing, the amount of color given to the surface of the dye, the smoothness of the outline of the pattern, etc. [0003] Since the advent of reactive dyes for more than 50 years, sodium alginate has been used as a paste for reactive dye printing at home and abroad. However, with the contin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/00D06P1/48D06P1/50D06P1/38
CPCC08B37/0096D06P1/48D06P1/50D06P1/38
Inventor 宋纯亮朱虎李林杰曹新秀刘江泉
Owner 山东广浦生物科技有限公司
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