Method for preparing papermaking dry strengthening agent

A technology of dry strength agent and conditioner, applied in papermaking, textile and papermaking, fiber raw material processing, etc., can solve the problems of increased equipment and personnel investment, high water retention value, unfavorable energy saving and emission reduction, etc., to improve retention and drainage. The effect of improving the burst resistance index and the sufficient source of raw materials

Active Publication Date: 2011-07-13
JIANGMEN GAOLIYI TECH IND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, starch is used as a dry strength agent. From the point of view of its use process, it needs to be gelatinized and diluted with steam, and then passed through a pump. The process is complicated, and the investment in equipment and personnel is increased; and the papermaking system uses a large amount of starch for a long time. As a reinforcing agent, the pollution to the white water of the paper machine is relatively large
In addition, the cooking and gelatinization of starch requires power consumption, which consumes both gas and electricity, which is not conducive to energy saving and emission reduction; from the use effect of the dry strength agent made by the existing technology, the paper products produced by using it as an auxiliary agent: For

Method used

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  • Method for preparing papermaking dry strengthening agent
  • Method for preparing papermaking dry strengthening agent
  • Method for preparing papermaking dry strengthening agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The mixture of oxidized starch sodium chlorate and polyanionic cellulose with a total weight of 0.5% is dissolved in pure water and then added to the reaction flask for stirring, adding 8.2 grams of acrylamide, 1.2 acrylic acid, 2.6 carboxylate and 3 grams of acrylonitrile. Copolymerize the mixed monomers, raise the temperature to 30°C, and react at this temperature for 1 hour; add sodium hydroxide solution with a weight concentration of 30%, adjust the pH value to 5.5, and one-step graft copolymerization occurs under this condition Reaction, add sodium sulfate, polyalkylphenol, ethylene glycol, hydrogen peroxide in the process of graft copolymerization reaction, enter into aging reaction process after graft copolymerization reaction, add sodium sulfite in aging reaction process, heat After reaching 65°C, it can be measured and packaged after aging for a period of time.

[0026] The measured paper enhancement effect is shown in the table below

[0027]

Embodiment 2

[0029] Dissolve the mixture of cationic starch and phospholipid starch amphoteric starch and polyanionic cellulose with pure water of 1.5% of the total weight and add to the reaction flask to stir, add 6.1 grams of acrylamide, 1.5 acrylates, 3.2 carboxylic esters and 3.5 gram of acrylonitrile composed of copolymerized mixed monomers, the temperature was raised to 45°C, and reacted at this temperature for 2 hours; adding a mixed solution of potassium hydroxide and rubidium hydroxide with a weight concentration of 30%, adjusted the pH value to 6.5, Under this condition, a one-step graft copolymerization reaction occurs, and sodium chloride, quinone phenols and polyalkylphenols, alcohols and isopropanol, potassium persulfate and ammonium persulfate are added during the graft copolymerization reaction. After the technical copolymerization reaction is completed, it enters the aging reaction process. During the aging reaction process, ethylene glycol amine and triethanolamine are add...

Embodiment 3

[0033] Dissolve the mixture of dextrin and polyanionic cellulose with a total weight of 2.5% in pure water, add it to the reaction flask and stir, add 6.5 grams of acrylamide, 1.8 grams of acrylic acid, 3.5 grams of carboxylate and 2 grams of acrylonitrile. For the monomer, raise the temperature to 60°C, and react at this temperature for 3 hours; add a mixed solution of hydrochloric acid and sulfuric acid with a weight concentration of 30%, adjust the pH value to 7, and under this condition, a one-step graft copolymerization reaction occurs, Add vinylamines and ammonia water, quinone phenols, alkyl mercaptans, benzoyl peroxide and water-soluble azos during the graft copolymerization reaction, and enter the aging reaction process after the graft copolymerization reaction is completed. Sodium bisulfite is added during the aging reaction process, heated to 78°C, and can be measured and packaged after aging for a period of time.

[0034] The measured paper enhancement effect is sh...

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Abstract

The invention discloses a method for preparing a papermaking dry strengthening agent. The method comprises the following steps of: dissolving a mixture of 0.5 to 2.5 weight percent of modified starch and polyanionic cellulose by using pure water; then adding a copolymerized blended monomer consisting of acrylamide, acrylic acid or ester thereof, carboxylic acid ester and acrylonitrile into the mixture solution; after the substances are mixed completely, raising the temperature of the mixture to between 30 and 60 DEG C, and reacting the mixture for 1 to 3 hours at the temperature; adding pH regulator to regulate the pH value of the mixture to between 5.5 and 7, and adding cross-linking prevention agent, reaction inhibitor, regulator and multi-element composite catalyst in the reaction under the pH condition by adopting a one-step grafting copolymerization reaction technology respectively; and performing ageing reaction after the grafting copolymerization reaction is completed, adding acuring agent in the ageing reaction process, heating the reactants to the temperature of between 65 and 78 DEG C, and obtaining the papermaking dry strengthening agent after ageing for certain time. The papermaking dry strengthening agent can remarkably improve the dry strength and the tearing strength of paper.

Description

Technical field: [0001] The invention belongs to the technical field of auxiliary agent preparation in papermaking technology, and relates to a preparation method of papermaking dry strength agent. Background technique: [0002] Among the currently used dry strength agents, starch-based dry strength agents almost occupy most of the market share. However, starch is used as a dry strength agent. From the point of view of its use process, it needs to be gelatinized and diluted with steam, and then passed through a pump. The process is complicated, and the investment in equipment and personnel is increased; and the papermaking system uses a large amount of starch for a long time. As a reinforcing agent, it pollutes the white water of the paper machine more. In addition, the cooking and gelatinization of starch requires power consumption, which consumes both gas and electricity, which is not conducive to energy saving and emission reduction; from the use effect of the dry streng...

Claims

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Application Information

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IPC IPC(8): D21H21/14
Inventor 曾文江张敏盛张益盛
Owner JIANGMEN GAOLIYI TECH IND
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