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Cationic polymer for papermaking and preparing method thereof

A technology of cationic polymers and mixtures, which is applied in papermaking, textiles, papermaking, paper, etc., can solve the problems of not being able to reach paper fibers, poor storage resistance, and easy gelation, etc., to achieve improved utilization and high charge density. , good storage stability and thermal stability

Active Publication Date: 2008-02-27
SHANGHAI DONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the organic polymer treatment agents currently on the market are used in the paper industry, due to their low cationicity (20-70%), they cannot achieve the dual purposes of paper fiber retention and wastewater anion adsorption, and there is also a system that is resistant to storage. The disadvantages of poor sex and prone to gel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Place a 1-liter reaction kettle equipped with a thermometer, a condenser, an agitator, and a nitrogen inlet and outlet in a constant temperature water bath, feed nitrogen into the reaction kettle, start stirring after 20 minutes, and add 140 grams of deionized water, 1 gram of n-dodecylmercaptan acetate, 0.4 gram of sodium dithiocarbamate, 2.1 gram of sodium phosphate. The temperature was raised to 40° C., and the monomer aqueous solution and the initiator aqueous solution were added dropwise.

[0021] in:

[0022] The aqueous monomer solution consists of 77 grams of acrylamide, 308 grams of dimethylaminoethyl methacrylate, benzyl quaternary ammonium chloride, and 70 grams of deionized water for 30 minutes;

[0023] The aqueous initiator solution consisted of 25.2 grams of potassium persulfate, 6.3 grams of sodium bisulfite, and 70 grams of deionized water for 30 minutes. After all the drops were completed, the reaction was continued at 40°C for 2 hours, and then the ...

Embodiment 2

[0027] Place a 1-liter reaction kettle equipped with a thermometer, a condenser, an agitator, and a nitrogen inlet and outlet in a constant temperature water bath, feed nitrogen into the reaction kettle, and after 10 minutes, start stirring, and add 140 grams of deionized water, 0.9 gram mono-n-dodecyl sodium sulfate, 0.5 gram aluminum sulfate, 1.4 gram 2,2-azobis(2-amidinopropyl) dihydrochloride, 0.7 gram EDTA. The temperature was raised to 25°C, and the monomer aqueous solution and the initiator aqueous solution were added dropwise. Wherein the aqueous monomer solution consists of 77 grams of acrylamide, 308 grams of methacryloyloxyethyltrimethylammonium chloride and 70 grams of deionized water in 60 minutes; the aqueous solution of the initiator consists of 25.2 grams of aluminum trichloride, 6.3 grams of methanol and 70 grams of deionized water for 40 minutes. After all the drops are completed, continue to react at 25°C for 0.1 hour, then raise the temperature to 60°C, an...

Embodiment 3

[0030] Place a 1-liter reaction kettle equipped with a thermometer, a condenser, an agitator, and a nitrogen inlet and outlet in a constant temperature water bath, feed nitrogen into the reaction kettle, and after 30 minutes, start stirring, and add 105 grams of deionized water, 1.4 gram dimethylpropionic acid, 0.7 gram sodium nitrite, 1.4 gram isopropanol. The temperature was raised to 60° C., and the monomer aqueous solution and the initiator aqueous solution were added dropwise. Wherein the aqueous monomer solution consists of 66 grams of acrylamide, 396 grams of dimethyl diallyl ammonium chloride and 52.5 grams of deionized water, and takes 70 minutes; the aqueous solution of the initiator consists of 17.5 grams of potassium persulfate and 7 grams of hydrogen sulfite Sodium and 52.5 grams of deionized water for 90 minutes. After all the drops are completed, continue to react at 60°C for 3 hours, then raise the temperature to 70°C, and after reacting for 1 hour, quickly co...

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Abstract

The present invention provides a cationic polymer for making paper and its preparation method. The described cationic polymer for making paper is one of acrylamide, ammonium methylacrylyloxyethyltrimethyl chloride, dimethylaminoethyl methacrylate chlorinated benzyl quaternary ammonium, dimethylaminoethyl acrylate chlorinated benzyl quaternary ammonium or ammonium dimethyl diallyl chloride or mixture of more than two kinds of them, under the initiation of initiating agent they are polymerized so as to obtain the invented cationic polymer. Its cationic charge density is 80%-95%, viscosity is 50-200 centripoise and its solid content is 50-70%.

Description

technical field [0001] The invention relates to a cationic polymer for papermaking and a preparation method thereof, in particular to a high charge density anion scavenger and retention aid for papermaking. Background technique [0002] In the industrial production process of papermaking, a large amount of waste water is often discharged. These wastewaters contain a large amount of paper fibers and toxic and harmful anions. On the one hand, due to the loss of a large amount of paper fibers, it has caused a lot of waste in production and increased the production cost of the enterprise; cause long-term harm. [0003] The traditional treatment method is to use inorganic flocculants, such as aluminum sulfate, etc. Due to the high cost, large dosage, and low anion adsorption efficiency of this type of flocculant, the development space of its application is greatly limited. [0004] In recent years, organic synthetic polymer water treatment agents have been rapidly promoted bec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/14D21H17/35
Inventor 施晓旦陈传雨李丽
Owner SHANGHAI DONGSHENG NEW MATERIALS
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