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Multi-functional guar gum derivative for papermaking and preparation method and application for multi-functional guar gum derivative

A guar gum derivative and multi-functional technology, applied in papermaking, textiles, papermaking, paper, etc., can solve problems affecting retention and drainage, enhancement effects, complicated procedures, etc., achieve short reaction time and small loss of product viscosity , The effect of high etherification efficiency

Inactive Publication Date: 2012-01-25
SOUTH CHINA UNIV OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the disadvantages of complex procedures in the current guar gum preparation process and the formation of intramolecular salts that affect retention and drainage and enhancement effects, and to expand the application of guar gum in the wet end of papermaking, the invention provides guar gum derivatives for multifunctional papermaking And its preparation method and application

Method used

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  • Multi-functional guar gum derivative for papermaking and preparation method and application for multi-functional guar gum derivative
  • Multi-functional guar gum derivative for papermaking and preparation method and application for multi-functional guar gum derivative
  • Multi-functional guar gum derivative for papermaking and preparation method and application for multi-functional guar gum derivative

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Experimental program
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Effect test

Embodiment 1

[0036] first step:

[0037]Add 60 grams of urea (1mol) into a three-necked bottle, add 60 grams of distilled water, heat to 50°C, dissolve the urea completely, then add 3 grams of emulsifier OP-10, add 3 grams of sodium carbonate, and ensure that the pH of the material is 8.5, Then add 83.6 grams of epichlorohydrin (the molar ratio of urea to 0.9:1) in 5 times, each interval is 10 minutes, the temperature is raised to 85 ° C, and the reaction is 6 hours to obtain a completely transparent solution, which is concentrated by a rotary evaporator to obtain the amide 136 grams of base nonionic etherification agent; its molecular formula is C 4 h 9 N 2 o 2 Cl (Mw=152.5), when used, it is prepared into a solution with a mass concentration of 60%;

[0038] Step two:

[0039] Add 50 grams of guar collagen powder to 100 grams of industrial alcohol, stir, vent nitrogen, add inorganic alkali solution A, inorganic alkali solution A is formed by mixing 10 grams of water, 1.5 grams of so...

Embodiment 2

[0041] first step:

[0042] Add 52 grams of sodium bisulfite (0.5mol) and 26 grams of sodium sulfite (0.016mol) into a three-necked flask, add 117 grams of distilled water, then add 9.7 grams of emulsifier OP-10, and add an appropriate amount of 1mol / L hydrochloric acid to ensure the pH of the material After that, 57.3 grams of epichlorohydrin (the molar ratio of sulfite ion is 1.2:1) was added in 10 times, with an interval of 5 minutes between each time, the temperature was raised to 50 ° C, and the reaction was carried out for 8 hours until the oil droplets of epichlorohydrin After disappearing, continue to react for 2h to obtain a completely transparent solution, and obtain 100 grams of sulfonate anion etherifying agent after being concentrated by a rotary evaporator; the molecular formula of this intermediate is C 3 h 6 ClO 4 NaS (Mw is 196.5), when used, it is prepared into a solution with a mass concentration of 60%;

[0043] Step two:

[0044] Add 45 grams of guar c...

Embodiment 3

[0046] first step:

[0047] Add 60 grams of urea (1mol) into a three-necked bottle, add 60 grams of distilled water, heat to 50°C, dissolve the urea completely, then add 6 grams of emulsifier AEO-7, and add 2.0 grams of sodium carbonate to ensure the pH of the material is 7.5. After that, 111.4 grams of epichlorohydrin (the molar ratio of urea and urea is 1.2:1) was added in 5 times, with an interval of 10 minutes between each time, the temperature was raised to 90°C, and the reaction was carried out for 5.0 hours to obtain a completely transparent solution, which was concentrated by a rotary evaporator to obtain 137 grams of amide-based nonionic etherification agent;

[0048] Step two:

[0049] Add 50 grams of guar collagen powder to 250 grams of tert-butanol, stir, ventilate nitrogen, add inorganic alkali solution A formed by mixing 12 grams of water, 1.5 grams of sodium phosphate and 4.0 grams of sodium hydroxide, stir at room temperature for 90 minutes to alkalize , then...

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Abstract

The invention provides a multi-functional guar gum derivative for papermaking and a preparation method and application for the multi-functional guar gum derivative. The preparation method comprises the following steps of: synthesizing an urea solution and epoxy chloropropane to obtain an amido nonionic etherifying agent, and mixing a mixed salt solution of sodium sulfite and sodium hydrogensulfite, an emulsifier and epoxy chloropropane to obtain a sulfonate anionic etherifying agent; and synthesizing the amido nonionic etherifying agent and / or the sulfonate anionic etherifying agent, a cationic etherifying agent and guar gum powder to obtain the guar gum derivative under the condition that an inorganic alkaline solution is added in multiple steps. The guar gum derivative contains a quaternary ammonium cationic group and an amido nonionic group or a sulfonate anionic group, and can remarkably improve retention and filtration aiding properties, pulp drainability and mechanical properties of paper products when used as a retention and filtration aid or a reinforcing agent in the papermaking industry. The guar gum derivative prepared by the method has higher molecular weight and lowerviscosity loss; meanwhile, by the preparation method, the reaction time is short and etherification efficiency is high.

Description

technical field [0001] The invention relates to a retention and drainage aid for papermaking, in particular to a multifunctional guar gum derivative for papermaking and a preparation method and application thereof. Background technique [0002] As a natural macromolecular polysaccharide, guar gum has a molecular structure very similar to cellulose, the main chain is (1,4)-β-D-mannose unit, and the side chain is (1,6) position linkage α-D-galactose, the ratio of galactose to mannose is 1:2, its water solubility is the best among natural polymers, the viscosity of 1% aqueous solution reaches 6000mpa.s~8000mpa.s, second only to konjac The original powder viscosity of mannan, but due to the existence of natural guar gum water-insoluble substances, the light transmittance of its aqueous solution can only reach 70-80%, and its biodegradation resistance is poor. Guar gum solution can spoil and deteriorate, and these deficiencies have all limited the application prospect of guar gu...

Claims

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Application Information

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IPC IPC(8): C08B37/00D21H17/32D21H21/10D21H21/18
Inventor 万小芳李友明陈伟明杨祖荫
Owner SOUTH CHINA UNIV OF TECH
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