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Low-chlorine environment-friendly PAE wet strength agent and synthesis method thereof

A technology of PAE wet strength agent and synthesis method, which is applied in the direction of reinforcement addition, special paper, non-fiber pulp addition, etc., can solve the problems of unoptimistic toxicity, environmental pollution, health damage, etc., and achieve stable appearance and color and excellent wetness. Intensity, effect of high charge density

Active Publication Date: 2021-06-25
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic chlorides include: epichlorohydrin (EpCl), 1,3-dichloro-2-propanol (DCP), 3-chloro-1,2-propanediol (MCPD), these low molecular weight organic chlorides are The paper with wet strength is only slightly absorbed by the fiber during the process, and a small amount remains in the paper. At the same time, a large amount of white water is discharged into the environment with the paper mill, which will bring two types of problems: the first is harmful to health, and the second is pollute the environment
[0007] At present, the problem of pollution caused by organic chlorides has attracted more and more attention. It has been proved that MCPD is a moderately toxic genotoxic carcinogen, which can inhibit the production of male hormones, reduce sperm activity, and is harmful to human body. The liver, kidney, nervous system, and blood circulation system can all cause toxic effects; although the mutagenic effect of DCP has not been confirmed, its potential toxic effects are not optimistic

Method used

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  • Low-chlorine environment-friendly PAE wet strength agent and synthesis method thereof
  • Low-chlorine environment-friendly PAE wet strength agent and synthesis method thereof
  • Low-chlorine environment-friendly PAE wet strength agent and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 146 grams of adipic acid (1.0mol) and 50 grams of deionized water into a four-necked flask, stir to form a slurry, and then feed nitrogen after vacuuming, then add 104 grams of diethylenetriamine (1.01mol) in sequence, and heat up by electric heating Heat it at 180°C for 2 hours, collect about 86.5 grams of water released during the reaction, and add 215 grams of deionized water to obtain a polyamide intermediate with a solid content of 50%, a viscosity of 340 cps, and a pH of 10.2.

[0032] 100 grams (0.232 mol) of the above-mentioned polyamide aqueous solution, 50 grams of deionized water, 0.2 g of triethanolamine, and 1.0 g of potassium carbonate were heated to 25 ° C during the stirring process, and 26 grams (0.281 mol) of epichlorohydrin was added dropwise. The dripping time is 2 hours. During the whole dripping process of epichlorohydrin, potassium carbonate solution needs to be continuously added to control the pH of the reactant in the kettle to be above 9....

Embodiment 2

[0034] Weigh 146 grams of adipic acid (1.0 mol) and 80 grams of deionized water into a four-neck flask, stir to form a slurry, vacuumize and feed nitrogen, then add 99 grams of diethylenetriamine (0.96 mol) in turn, and heat up by electric heating Heat it at 175°C for 2 hours, collect about 115 grams of water released during the reaction, add 210 grams of distilled water to obtain a polyamide intermediate with a solid content of 50%, a viscosity of 420 cps, and a pH of 9.7.

[0035] With 100 grams (0.228mol) of the above-mentioned polyamide aqueous solution, 65 grams of deionized water, 0.2 g of hexamethylenetetramine, and 1.0 g of sodium carbonate, the temperature was raised to 25 ° C during the stirring process, and 28 grams of epichlorohydrin ( 0.303mol), the dropping time is 2h. During the whole epichlorohydrin dripping process, sodium carbonate solution needs to be continuously added to control the pH of the reactant in the kettle to be above 9.5. After the end of epichlor...

Embodiment 3

[0037] Weigh 146 grams of adipic acid (1.0mol) and 120 grams of deionized water and add them to a four-necked flask, stir to form a slurry, vacuumize and feed nitrogen, then add 102 grams of diethylenetriamine (0.99mol) and heat up to 180°C, keep warm for 2.0 hours, collect about 137 grams of water released during the reaction, add 212 grams of distilled water to obtain a polyamide intermediate, and its indicators are 50% solid content, 480 cps viscosity, and 9.8 pH.

[0038]With 100 grams (0.228mol) of the above-mentioned polyamide aqueous solution, 80 grams of deionized water, 0.6 g of hexamethylenetetramine, and 1.0 g of sodium carbonate, the temperature was raised to 25 ° C during the stirring process, and 30 grams of epichlorohydrin ( 0.324mol), and the dropping time is 2h. During the whole epichlorohydrin dripping process, sodium carbonate solution needs to be continuously added to control the pH of the reactant in the kettle to be above 9.5. After 30 minutes of epichloro...

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Abstract

The invention discloses a low-chlorine environment-friendly PAE wet strength agent and a synthesis method thereof. The preparation method comprises the following steps: carrying out high-temperature polymerization on adipic acid and diethylenetriamine under a nitrogen condition to obtain a polyamide polyamine intermediate, slowly dropwise adding epoxy chloropropane by taking organic amine and an inorganic alkaline substance as catalysts, carrying out quaternization cross-linking reaction, and adding acid and water to stop the reaction after a reactant reaches preset thermal viscosity to obtain a final polymer. The polymer disclosed by the invention contains relatively low organic chloride content, high charge density and wet strength and good stability, and is widely applied as a wet strength agent.

Description

technical field [0001] The invention relates to a wet strength agent and a synthesis method thereof in the field of paper industry additives, in particular to a low-chlorine environment-friendly PAE wet strength agent and a synthesis method thereof. Background technique [0002] The wet strength agent for paper with low residual organic chlorine is a formaldehyde-free, low-toxic, high-efficiency chemical auxiliary for papermaking. It is a cationic thermosetting resin and is a green fine chemical that urgently needs to be developed. Widely used in food packaging paper (such as tea bag filter paper, milk packaging paper), facial tissues, napkins and other paper types that come into contact with human body or food. At present, the residual low-molecular organic chloride content of such products produced in our country exceeds the hygienic requirements. In recent years, foreign countries have imposed strict restrictions on the content of DCP in such products, and Germany has al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02D21H21/20D21H27/00D21H17/56
CPCC08G73/0293D21H21/20D21H27/00D21H27/002D21H17/56
Inventor 朱先梅鄂玉萍唐艳军陈西羽冉婷
Owner ZHEJIANG SCI-TECH UNIV
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