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Preparation method of cationic dendrimer-star polymer papermaking additive

A technology of star polymer and papermaking auxiliaries, applied in papermaking, textiles and papermaking, paper and other directions, can solve problems such as reducing the use effect

Active Publication Date: 2011-04-20
山东济清科技服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional linear structure polymer molecules will undergo adsorption, reconstruction and diffusion on the surface of paper components during use, reducing the use effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0007] A preparation method of a cationic tree core star polymer papermaking auxiliary, the steps are as follows:

[0008] 1. Use trishydroxymethylaminomethane to react with half-generation dendritic polyamide-amine (Gn.5PAMAM) of terminal ester group to synthesize hydroxyl-terminated dendrimers.

[0009] Under magnetic stirring, trihydroxymethylaminomethane was dissolved in dimethyl sulfoxide in advance to obtain a dimethyl sulfoxide solution of trihydroxymethylaminomethane, which was set aside.

[0010] Add the half-generation dendritic polyamidoamine (Gn.5PAMAM) into the reactor, add dimethyl sulfoxide dropwise to the reactor under stirring and feeding nitrogen to completely dissolve the half-generation dendritic polyamido-amine, After mixing evenly, add anhydrous potassium carbonate to the reactor. Then, the pre-prepared dimethyl sulfoxide solution of trihydroxymethylaminomethane was added dropwise to the reactor under stirring and blowing nitrogen. After the dropwise ad...

Embodiment 1

[0033] (1) Under magnetic stirring, 29.07 g (0.24 mol) of trihydroxymethylaminomethane was dissolved in 95 mL of dimethyl sulfoxide in advance, and placed in a constant pressure dropping funnel for later use. 20.2g (0.05mol) of the 0.5th generation dendritic polyamidoamine (G0.5PAMAM) was added into a 500mL three-necked flask, and 75mL of dimethyl sulfoxide was added dropwise thereto under stirring and nitrogen gas. After the half-generation dendritic polyamidoamine was completely dissolved and mixed uniformly, 33.16 g (0.24 mol) of anhydrous potassium carbonate was added into the three-necked flask. Then, the dimethyl sulfoxide solution of trihydroxymethylaminomethane prepared in advance was added dropwise into the three-necked flask by using a constant-pressure dropping funnel under stirring and blowing nitrogen. After the dropwise addition, the temperature in the three-necked flask was raised to 45° C., and the reaction was carried out for 3 days under stirring. After the ...

Embodiment 2

[0037] (1) Under magnetic stirring, 14.53 g (0.12 mol) of trihydroxymethylaminomethane was dissolved in 50 mL of dimethyl sulfoxide in advance, and placed in a constant pressure dropping funnel for later use. Add 12.05g (0.01mol) of the 1.5th generation dendritic polyamidoamine (G1.5PAMAM) into a 250mL three-necked flask, and add 50mL of dimethyl sulfoxide dropwise thereto under stirring and blowing nitrogen. After the half-generation dendritic polyamidoamine was completely dissolved and mixed uniformly, 16.58 g (0.12 mol) of anhydrous potassium carbonate was added to the three-necked flask. Then, the dimethyl sulfoxide solution of trihydroxymethylaminomethane prepared in advance was added dropwise into the three-necked flask by using a constant-pressure dropping funnel under stirring and blowing nitrogen. After the dropwise addition, the temperature in the three-necked flask was raised to 50° C., and the reaction was carried out for 5 days under stirring. After the reaction ...

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Abstract

The invention relates to a preparation method of a cationic dendrimer-star polymer papermaking additive. The method comprises the following steps of: firstly, making trihydroxymethyl aminomethane and ester-terminal semi-substituted dendritic polyamidoamine subjected to an amidation reaction to synthesize hydroxyl-terminal dendritic macromolecules; then, decorating the terminal groups of the hydroxyl-terminal dendritic macromolecules to synthesize a dendritic multifunctional initiator; and initiating a quaternary ammonium type cationic monomer to transfer atoms, polymerize free radicals and synthesize the cationic dendrimer-star polymer by using the dendritic multifunctional initiator as an initiation start core and using transition metal halide / complex ligand as a catalysis system. The invention can favorably control the topological structure, the molecular weight and the molecular weight distribution of polymer molecules and has higher monomer conversion and initiator efficiency, and the prepared cationic dendrimer-star polymer is used as an anionic trash scavenger, a control agent, a retention and filter aid, a sizing enhancement agent and the like in the papermaking industry.

Description

technical field [0001] The invention relates to a preparation method of cationic tree core star polymer papermaking auxiliary agent, belonging to the technical field of papermaking chemicals and wet end chemistry. Background technique [0002] With the adjustment of the raw material structure of the papermaking industry, the increase of the speed of the paper machine and the improvement of the degree of closed circulation of the white water system of the paper machine, the papermaking wet end papermaking system has become more and more complicated. In order to strengthen the water filtration of paper materials, increase the speed of the paper machine, increase the retention of fine fibers and fillers, reduce waste of resources, improve the evenness of paper, improve the performance of paper sheets, reduce the content of anion garbage in the system, increase the degree of closed cycle of white water and stabilize the operation of the paper machine Therefore, it is necessary t...

Claims

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Application Information

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IPC IPC(8): C08F283/04C08G69/48D21H17/45
Inventor 傅英娟杨乾秦梦华李宗全刘娜徐清华
Owner 山东济清科技服务有限公司