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Methyl carboxymethyl guar gum and its preparation method and application

A technology of methyl carboxymethyl guar gum and carboxymethyl guar gum, applied in dyeing, textile and paper making, etc., can solve the problem of water solubility, poor fluidity and permeability, easy leakage, beating time Long and other problems, to achieve the effects of good water solubility, high permeability, and high degumming rate

Active Publication Date: 2022-02-08
昆山京昆油田化学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, with the development of printing and dyeing technology, various synthetic thickeners with excellent performance have been widely used in actual production, but sodium alginate is still the most widely used as a traditional paste for reactive dye printing, but sodium alginate In the process of use, there are also shortcomings such as long beating time, strong fluidity, and easy leakage. The researchers modified the guar gum (structural formula shown in formula II) with carboxymethyl groups to obtain excellent water-soluble , fluidity, permeability and good net-penetrating performance of high-substitution carboxymethyl guar gum printing paste, can partially or completely replace the application of sodium alginate in printing and dyeing, such as CN102720073B, CN104672341A and CN104130337A, disclosed respectively Carboxymethyl guar gum, carboxymethyl hydroxyethyl guar gum and carboxymethyl hydroxypropyl guar gum, but there are still problems with water solubility, fluidity and permeability

Method used

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  • Methyl carboxymethyl guar gum and its preparation method and application
  • Methyl carboxymethyl guar gum and its preparation method and application
  • Methyl carboxymethyl guar gum and its preparation method and application

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preparation example Construction

[0030] The present invention also provides the preparation method of the methyl carboxymethyl guar gum described in above-mentioned technical scheme, comprises the following steps:

[0031] Carboxymethyl guar gum, inorganic alkaline substance and water are mixed to carry out alkalization reaction to obtain alkalization product;

[0032] Under vacuum conditions, the alkalized product is mixed with methyl chloride to carry out etherification reaction to obtain the methyl carboxymethyl guar gum.

[0033] The present invention mixes carboxymethyl guar gum, inorganic alkaline substances and water for alkalization reaction to obtain alkalization products. In the present invention, the inorganic alkaline substance is preferably sodium hydroxide, and the mass ratio of the sodium hydroxide to carboxymethyl guar gum is preferably 0.3 to 0.6:1, and the alkalized inorganic alkaline substance The role is to activate the hydroxyl group. The present invention preferably mixes sodium hydrox...

Embodiment 1

[0053] (1) Alkalization reaction

[0054] At room temperature, add 100g of ethanol and 300g of water into the reaction kettle, then add 45g of sodium hydroxide into the reaction kettle, stir to dissolve evenly, raise the temperature of the kettle to 40°C, add 48g of guar gum powder, and stir for 15 minutes ;

[0055] (2) guar gum and sodium chloroacetate etherification reaction

[0056] The reaction temperature was raised to 70°C, 80g of 15wt% sodium chloroacetate solution was added to the system, the reaction was continued to stir for 60 minutes, and the temperature was lowered to 30°C;

[0057] (3) Alkalization reaction

[0058] Add 45g of sodium hydroxide solution with a mass concentration of 40% into the above reaction kettle, and stir for 15 minutes;

[0059] (4) etherification reaction of carboxymethyl guar gum and methyl chloride

[0060] Vacuumize the reactor, add 25g of methyl chloride, raise the temperature to 50°C at the same time, keep the temperature and stir ...

Embodiment 2

[0064] (1) Alkalization reaction

[0065] At room temperature, add 100g of ethanol and 300g of water into the reaction kettle, then add 45g of sodium hydroxide into the reaction kettle, stir to dissolve evenly, raise the temperature of the kettle to 40°C, add 48g of guar gum powder, and stir for 15 minutes ;

[0066] (2) guar gum and sodium chloroacetate etherification reaction

[0067] The reaction temperature was raised to 70°C, 100g of 15wt% sodium chloroacetate solution was added to the system, the reaction was continued to stir for 60 minutes, and the temperature was lowered to 30°C;

[0068] (3) Alkalization reaction

[0069] Add 45g of sodium hydroxide solution with a mass concentration of 40% into the above reaction kettle, and stir for 15 minutes;

[0070] (4) etherification reaction of carboxymethyl guar gum and methyl chloride

[0071] Vacuumize the reactor, add 25g of methyl chloride, raise the temperature to 50°C at the same time, keep the temperature and stir...

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Abstract

The invention provides a methyl carboxymethyl guar gum and its preparation method and application, belonging to the technical field of reactive printing and dyeing pastes. The invention provides a kind of methyl carboxymethyl guar gum, the aqueous solution of methyl carboxymethyl guar gum has higher viscosity, has good rheological property and high permeability, and methyl carboxymethyl guar gum As a paste in reactive printing and dyeing, glue has good water solubility, is easy to wash off, has good rheological properties when passing through the printing screen, does not chemically react with reactive dyes and fabrics, and does not affect the fabric feel; and methyl has a certain Hydrophobic, more conducive to the dispersion of dyes in the paste, with a higher depaste rate.

Description

technical field [0001] The invention relates to the technical field of reactive printing and dyeing pastes, in particular to methyl carboxymethyl guar gum and its preparation method and application. Background technique [0002] Printing paste is an important part of printing paste. It does not react during the printing process and mainly acts as a transfer medium. Its performance directly affects the quality and cost of printed products. At present, with the development of printing and dyeing technology, various synthetic thickeners with excellent performance have been widely used in actual production, but sodium alginate is still the most widely used as a traditional paste for reactive dye printing, but sodium alginate In the process of use, there are also shortcomings such as long beating time, strong fluidity, and easy leakage. The researchers modified the guar gum (structural formula shown in formula II) with carboxymethyl groups to obtain excellent water-soluble , flu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/00D06P1/48D06P1/38D06P3/60
CPCC08B37/0096D06P1/48D06P1/38D06P3/66
Inventor 彭树华陆伟孙雪莲李博邓明宇陈卫平何建平王军民
Owner 昆山京昆油田化学科技有限公司
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