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Cation guar gum with transparent gum liquid and preparation method thereof

A technology of cationic guar gum and guar gum, which is applied in the field of cationic guar gum and its preparation, can solve the problems of slow dissolution rate, difficult control of viscosity and high cost, and achieve high transparency, suitable viscosity and stable glue solution Effect

Inactive Publication Date: 2010-07-07
刘东辉 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Natural guar polysaccharides have the following disadvantages: high content of water-insoluble matter; cannot quickly swell and hydrate, and dissolve slowly; viscosity is not easy to control; resistance to electrolytes and microbial degradation is poor. After that, the above shortcomings can be significantly improved
Its shortcoming is that modified guar gum polysaccharide aqueous solution concentration is low, and its preparation method is difficult to industrialization and mass production, and cost is higher
Application facts show that cationic guar gums with different degrees of substitution and different viscosities are used in different fields. U.S. USP3326890, USP3350186, USP 3483121, etc. disclose the preparation process of cationic guar gums, but these technologies have complicated synthesis steps and the degree of substitution of products Low defects, especially not applicable to transparent daily chemical products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Put 30 grams of solid NaOH into the mixed solution of 230 grams of ethanol and 60 grams of water (dispersion medium, the weight fraction of water is 20.7%), stir and dissolve to obtain high-concentration lye, pour it into a three-necked bottle, add 100 grams of Guar collagen powder was stirred evenly at room temperature, and alkalized for 1.5 hours to obtain a dispersion. Warming up to 60°C, 160 grams of 3-chloro-2-hydroxypropyltrimethylammonium chloride etherification agent solution (mass percentage concentration 69%, containing 3-chloro-2-hydroxypropyl trimethylammonium chloride) was added dropwise to the dispersion. Methyl ammonium chloride 110.4 grams), after constant temperature reaction 2.5 hours, cooling, obtains reaction solution. The pH value of the reaction solution is adjusted to 7 with hydrochloric acid with a mass percent concentration of 30 wt%, and the transparent cationic guar gum of this glue solution is obtained after washing, filtering and drying. Th...

Embodiment 2

[0021] Put 32 grams of solid KOH alkali into the mixed solution of 200 grams of isopropanol and 52 grams of water (dispersion medium, the weight fraction of water is 20.6%), stir and dissolve to obtain a high-concentration lye, pour it into a three-necked bottle, add 100 grams of guar collagen powder were stirred evenly at room temperature and alkalized for 2 hours to obtain a dispersion. Warming up to 50°C, 180 grams of 3-chloro-2-hydroxypropyltrimethylammonium chloride etherification agent solution (mass percentage concentration 69%, containing 3-chloro-2-hydroxypropyl trimethylammonium chloride) was added dropwise to the dispersion. Methyl ammonium chloride 124.2), after constant temperature reaction for 3.5 hours, the temperature was lowered to obtain a reaction solution. The pH value of the reaction solution was adjusted to 7 with 30 wt% hydrochloric acid, and the cationic guar gum with transparent glue was obtained after washing, filtering and drying. The output of cati...

Embodiment 3

[0023] Put 26 grams of solid NaOH alkali into the mixed solution of 200 grams of isopropanol and 52 grams of water (dispersion medium, the weight fraction of water is 20.6%), stir and dissolve to obtain high-concentration lye, pour it into a three-necked bottle, add 100 grams of guar collagen powder were stirred evenly at room temperature and alkalized for 2 hours to obtain a dispersion. Warming up to 50°C, 160 grams of 3-chloro-2-hydroxypropyltrimethylammonium chloride etherification agent solution (mass percentage concentration 69%, containing 3-chloro-2-hydroxypropyl trimethylammonium chloride) was added dropwise to the dispersion. Methyl ammonium chloride 110.4 grams), after constant temperature reaction 4.5 hours, cooling, obtains reaction solution. The pH value of the reaction solution was adjusted to 7 with 30 wt% hydrochloric acid, and the cationic guar gum with transparent glue was obtained after washing, filtering and drying. The output of cationic guar gum is 147 g...

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Abstract

The invention discloses cation guar gum and a preparation method thereof, wherein the cation guar gum is prepared by the method comprising the following steps of: 1. putting 26-32 parts by weight of solid base into 150-360 parts by weight of dispersion medium to prepare a high-concentration lye, and then adding 100 parts by weight of guar gum into the lye for fully swelling; 2. dropwise adding 140-200 parts by weight of cation etherifying agent, reacting for 2-5 hours at the temperature of 40-80 DEG C, then neutralizing a pH to 7-8 through an acid, washing, centrifugalizing and drying. The cation guar gum solution has higher transparency, and the light transmittance of a 1-percent guar gum derivative solution is measured by a spectrophotometer to be higher than 85 percent; the viscosity is 100-800mPa.s; and the substitution degree of cations is high and can be 0.7-1.0. The cation guar gum of the invention has suitable viscosity and stable gum liquid and is very suitable for the field of transparent personal-care supplies.

Description

technical field [0001] The invention relates to a modified polysaccharide product and a preparation method thereof, in particular to a cationic guar gum and a preparation method thereof. Background technique [0002] Guar gum, known as "guargum" in English, also known as guar gum, guar gum, etc., is a highly purified natural polysaccharide extracted from guar beans, a leguminous plant widely planted in the Indian-Pakistan subcontinent. Guar gum polysaccharide is a natural galactomannan, the main chain of its chemical structure is (1,4)-β-D mannose as a unit, and the side chain is composed of α-D galactose and (1,6 ) bonds are connected to the main chain. There is a galactose branch every other mannose, and the ratio of the two is about 2:1. Polysaccharides can be dispersed in water to form high-viscosity liquids. Generally, the viscosity of a 1% aqueous solution of polysaccharide raw powder is 4000-6000 mPa·s. Natural guar polysaccharides have the following disadvantages:...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/00A61K8/73
Inventor 牛春梅李绍英王著刘东辉
Owner 刘东辉
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