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Cation guar gum and preparing process thereof

A cationic guar gum and guar collagen technology, applied in the field of guar gum and its preparation, can solve the problems of complex synthesis steps, low degree of product substitution, low viscosity, etc.

Inactive Publication Date: 2007-11-28
SHANGHAI DONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as U.S. Patent USP3326890, USP3350186, USP3483121, etc. disclose the preparation process of cationic guar gum, but these patented technologies have complex synthesis steps, low substitution degree of product, or high substitution degree and low viscosity defects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Add 250 grams of methanol to the reaction kettle at room temperature, disperse 100 grams of guar collagen powder evenly, add 10 grams of 20% sodium hydroxide solution, alkalinize for 30 minutes, replace nitrogen for 3 times, and then add cationic etherification agent 3- Chloro-2 hydroxypropyl-trimethyl ammonium chloride 20 grams, then pressurize to 0.4Mpa, heat up to 40°C, keep warm for 6 hours, cool down and discharge, neutralize with dilute acetic acid to pH 7-8, filter with suction , dried and pulverized, sealed and packaged for use. According to GB12309-90, the cationic substitution degree is 0.3, and the viscosity (NDJ-1 viscometer, 25°C 4# rotor 60rpm) is 4950mPa.s

Embodiment 2

[0018] Add 350 grams of industrial ethanol to the reaction kettle at normal temperature, disperse 100 grams of guar collagen powder evenly, add 20 grams of 40% sodium hydroxide solution, alkalinize for 10 minutes, replace with nitrogen for 3 times, add cationic etherification agent 2, 40 grams of 3-epoxypropyltrimethylammonium chloride, then pressurize to 0.1Mpa, heat up to 25°C, keep warm for 4 hours, cool down and discharge, neutralize with dilute acetic acid to pH 7-8, filter with suction, Dried and crushed, sealed and packaged for later use. According to GB12309-90, the cationic substitution degree is 0.7, and the viscosity (NDJ-1 viscometer, 25°C 4# rotor 60rpm) is 4500mPa.s

Embodiment 3

[0020] Add 400 grams of petroleum ether to the reaction kettle at room temperature, disperse 100 grams of guar collagen powder evenly, add 60 grams of 60% sodium hydroxide solution, alkalinize for 60 minutes, replace with nitrogen for 3 times, and then add cationic etherification agent A Dimethylaminoethyl acrylate 80 grams of benzyl quaternary ammonium chloride, then pressurize to 0.2Mpa, heat up to 80°C, keep warm for 10 hours, cool down and discharge, neutralize the pH to 7-8 with dilute acetic acid, and filter with suction , dried and pulverized, sealed and packaged for use. According to GB12309-90, the cationic substitution degree is 0.45, and the viscosity (NDJ-1 viscometer, 25°C 4# rotor 60rpm) is 6000mPa.s

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PUM

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Abstract

The present invention discloses one kind of cationic guar gum and its preparation process. The preparation process includes the following steps: 1. adding guar gum in 100 weight portions into low polar or non-polar solvent in 250-500 weight portions at normal temperature, and adding water solution of alkaline catalyst in 10-60 weight portions for soaking to alkalize; and 2. adding cationic etherifying agent in 20-80 weight portions into the alkalized guar gum solution while stirring at pressure of 0.1-0.4 MPa to react, and collecting the target product after reaction. Thus prepared cationic guar gum has cationic substitution degree of 0.3-0.7 and viscosity of 4500-6000 mPa.s, and may be applied in papermaking, skin care product and other fields.

Description

technical field [0001] The invention relates to a guar gum and a preparation method thereof, in particular to a preparation method of a cationic guar gum. Background technique [0002] Guar gum is a kind of leguminous plant, which is a natural galactomannan, which mainly grows in the arid regions of India and Pakistan. The main chain of its chemical structure is (1,4)-β-D mannose as the unit, and the side The chain is composed of α-D galactose and connected to the main chain by (1,6) bonds. [0003] Galactose is randomly distributed on the main chain, and this basically linear but branched structure determines that the properties of guar gum are significantly different from those of unbranched, water-insoluble glucomannan. It has a similar molecular structure to cellulose, which determines that it has a natural affinity with cellulose. [0004] Guar collagen powder can only be dissolved in aqueous solution, but the defects such as slow dissolution of the original powder in...

Claims

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Application Information

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IPC IPC(8): C08B37/00
Inventor 施晓旦李丽
Owner SHANGHAI DONGSHENG NEW MATERIALS
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