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Cation type water-soluble polymer dispersion

A water-soluble polymer, cationic technology, applied in the field of preparation of cationic water-soluble polymer dispersions, can solve the problems such as the inability of the dispersion polymerization reaction to proceed normally, the high viscosity of the system, and the influence on the performance of high molecular weight polymers.

Active Publication Date: 2005-12-21
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

In these patents, the importance of using the hydrophobic monomer N, N-di-methyl-N-benyl (meth) ethylamine acrylate has been emphasized, but the excessive use of this kind of hydrophobic monomer will affect Obtaining High Molecular Weight Polymer and Its Application Properties
Reduce or do not add this kind of hydrophobic monomer at all, the viscosity of the system is too high during the reaction process, so that the dispersion polymerization reaction cannot be carried out normally, so it is very urgent to develop an ideal dispersion system that can suppress excessive viscosity increase during the reaction process subject

Method used

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  • Cation type water-soluble polymer dispersion
  • Cation type water-soluble polymer dispersion
  • Cation type water-soluble polymer dispersion

Examples

Experimental program
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Effect test

Synthetic example 1

[0044] Synthesis Example 1: Preparation of Cationic Addition Polymer Dispersant.

[0045] Get 60g of acrylate trimethylamine ethyl chloride (DAC) according to the sequence number 1 of table 1 or get 60g of acrylate trimethylamine ethyl chloride (DAC) and acrylamide (AAM) according to the proportioning ratio of table 1 sequence number 2 ) or take 60g of N, N-dimethyl-N', N'-diallyl ammonium chloride (DD) according to the proportioning ratio of No. 3 in Table 1, add sulfuric acid dropwise to adjust the The pH is 3, after the temperature is raised to 42 degrees, the nitrogen gas is passed for about 30 minutes, and 3 g of 2% aqueous solution of V-50 is added to initiate the polymerization system. After 15 hours of reaction, the heating was stopped to obtain a cationic addition polymer dispersant. See No. 1, No. 2 and No. 3 in Table 1 for details. The weight-average molecular weight and cationicity were measured respectively by static light scattering and colloid titration analys...

Synthetic example 2

[0046] Synthesis Example 2: Preparation of Condensed Polymer Dispersant.

[0047] Add 90 g of 50% dimethylamine (DA) aqueous solution and 97.8 g of deionized water in a 500 ml 4-neck round bottom flask equipped with a thermometer, a nitrogen inlet, a stirrer and a continuous monomer addition tube. Within 1 hour, 101.8 g of epichlorohydrin (EPI) was added dropwise at a molar ratio of 1:1.1, and an ice-water bath was used to keep the system temperature at 50° C. during the dropwise addition. After reacting for 5 hours, the reaction was terminated to obtain a condensed polymer dispersant. The results are shown in No. 4 of Table 1.

Synthetic example 3

[0048] Synthesis Example 3: Synthesize the condensation polymer dispersant according to the method of Synthesis Example 2, the results are shown in the serial number 5-6 of Table 1.

[0049] Below is the embodiment that prepares cationic water-soluble polymer dispersion:

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Abstract

The invention relates to a kind of cation water-soluble macromolecule dispersoid. It includes inorganic salt watery solution, more than one kind of cation addition polymer soluble in the inorganic salt watery solution and more than one kind of water-soluble cation monomer and methylol acrylamide or acrylamide monomer to form water-soluble monomer system. Because the invention uses the compound dispersing agent comprised of cation addition polymer and condensation polymer dispersing agent, it makes the technology effect of cation water-soluble macromolecule dispersoid very remarkable. Compared with the cation addition polymer, the condensation polymer dispersing agent has lower molecular weight and bigger stoichiometic concentration; it's easy to absorb and compactly cover on the surface of particles, and stabilize the dispersed particles by using the repellent effect of its charges; it form microphase separation state between the separated particles and the dissolution state macromolecules, to have the effect of stabilizing the dispersing system.

Description

technical field [0001] The invention belongs to the technical field of preparation of cationic water-soluble polymer dispersions. Background technique [0002] Due to its excellent viscosity-increasing, flocculating, drag-reducing and water-retaining properties, water-soluble polymer materials are widely used in many fields such as wastewater treatment and papermaking. High-molecular-weight water-soluble polymer materials will form a high-viscosity state during the dissolution process before use, which is undesirable in most cases. Therefore, the inherent shape of a product is one of the factors that affect its practical performance, and it is also one of the keys to research and development. For example, when a water-soluble polymer is polymerized by static synthesis, it is generally required that the monomer concentration be above 10% to obtain a high-molecular-weight polymer, and the polymer obtained by this method is usually a hydrogel. It is very difficult to dissolve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/03
Inventor 王丕新张文德陈冬年刘晓光项盛
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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