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Cation acrylamide copolymer water-in-water emulsion and its preparation method

A technology of acrylamide copolymer and water-in-water emulsion, which is applied in the field of cationic acrylamide copolymer water-in-water emulsion and its preparation. High active matter content and other issues, to achieve the effect of low cost, lower viscosity and easy handling

Inactive Publication Date: 2009-07-22
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above patents all emphasize the importance of avoiding high viscosity in the polymerization process by using hydrophobic monomers, without breaking through the limitation of one-time feeding method, it is difficult to obtain water-in-water emulsion products with high active content
Although polymers containing benzyl structural units or C1-C10 alkyl units with good hydrophobic properties are more likely to precipitate in saline solution, the presence of benzyl groups in polymers is unfavorable from an economic and environmental point of view, and the use of hydrophobic monomers Bulks can also negatively affect polymer molecular weight and application properties
During the polymerization process, the high monomer concentration may be the main reason that the viscosity is difficult to control during the polymerization process

Method used

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  • Cation acrylamide copolymer water-in-water emulsion and its preparation method
  • Cation acrylamide copolymer water-in-water emulsion and its preparation method
  • Cation acrylamide copolymer water-in-water emulsion and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1. A cationic acrylamide copolymer water-in-water emulsion. It includes 25% by weight of active cationic polymer, 15% by weight of polymer stabilizer and 15% by weight of inorganic salt. The active cationic polymer contains 72.8-90 mol% of at least one water-soluble monomer (A), 10-26 mol% of at least one cationic monomer (B) and 0.2-1.0 mol% of at least one hydrophobic monomer (C). The polymer is obtained by radical polymerization under the condition of pH 3-8.

[0035] Monomer (A) is a molecule corresponding to the following general formula (I):

[0036]

[0037] where R 1 means H or CH 3 , R 2 and R 3 Each independently represents H, C 1 -C 6 Alkyl or cycloalkyl; Monomer (B) is a molecule corresponding to the following general formula:

[0038] Monomer B having the following general formula (II) 1

[0039]

[0040] Where A represents O or NH, B represents CH 2 CH 2 、CH 2 CH 2 CH 2 or CH 2 CHOHCH 2 , R 4 means H or CH 3 , R 5 and R ...

Embodiment 2

[0048] Example 2. A cationic acrylamide copolymer water-in-water emulsion. It includes 15 wt% active cationic polymer, 1.0 wt% polymer stabilizer and 22 wt% inorganic salt. The active cationic polymer contains 72.8-90 mol% of at least one water-soluble monomer (A), 10-26 mol% of at least one cationic monomer (B) and 0.2-1.0 mol% of at least one hydrophobic monomer (C). The polymer is obtained by radical polymerization under the condition of pH 3-8.

[0049] Monomer (A) is a molecule corresponding to the following general formula (I):

[0050]

[0051] where R 1 means H or CH 3 , R 2 and R 3 Each independently represents H, C 1 -C 6 Alkyl or cycloalkyl; Monomer (B) is a molecule corresponding to the following general formula:

[0052] Monomer B having the following general formula (II) 1

[0053]

[0054] Where A represents O or NH, B represents CH 2 CH 2 、CH 2 CH 2 CH 2 or CH 2 CHOHCH 2 , R 4 means H or CH 3 , R 5 and R 6 Each independently represe...

Embodiment 3

[0062] Example 3. A cationic acrylamide copolymer water-in-water emulsion. It includes 5 wt% cationic polymer, 30 wt% polymer stabilizer and 32 wt% inorganic salt. The active cationic polymer contains 72.8-90 mol% of at least one water-soluble monomer (A), 10-26 mol% of at least one cationic monomer (B) and 0.2-1.0 mol% of at least one hydrophobic monomer (C). The polymer is obtained by radical polymerization under the condition of pH 3-8.

[0063] Monomer (A) is a molecule corresponding to the following general formula (I):

[0064]

[0065] where R1 means H or CH 3 ,R 2 and R 3 Each independently represents H, C 1 -C 6 Alkyl or cycloalkyl; Monomer (B) is a molecule corresponding to the following general formula:

[0066] Monomer B having the following general formula (II) 1

[0067]

[0068] Where A represents O or NH, B represents CH 2 CH 2 、CH 2 CH 2 CH 2 or CH 2 CHOHCH 2 ,R 4 means H or CH 3 ,R 5 and R 6 Each independently represents CH 3 or C...

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Abstract

The invention relates to a cationic acrylamide copolymer aqueous emulsion-water and the method for preparing the same. The compound comprises 5-25 wt% of cationic polymer, 1.0-15 wt% of polymer stabilizer and 15-32 wt% inorganic salt. Said active cationic polymer comprises 72.8-90 mol% of at least one water-soluble monomer (A), 10-26 mol% of at least one cationic monomer (B), and 0.2-1.0 mol% of at least one hydrophobic monomer (C), and said polymer is prepared through free radical polymerization with pH being 3-8. The monomer (A) (B) possesses general formula respectively, monomer (c) is C1-C8 dialkyl ester of itaconic acid or C1-C32 alkyl ester of acroleic acid or C1-C32 alkyl ester or diene monomer of methacrylic acid. The method is multi-stage, and it can reduce polymerization system viscosity, increase active material content and stability of aqueous emulsion-in-water, which is characterized by high concentration, low cost, good fluidity and easiness for treatment.

Description

technical field [0001] The invention belongs to the technical field of polymer aqueous emulsion, and more specifically relates to the proposal and improvement of a cationic acrylamide copolymer water-in-water emulsion and a preparation method thereof. Background technique [0002] High molecular weight water-soluble cationic polymers have a wide range of uses, and can be used as flocculants and dehydrating agents in wastewater treatment, retention and drainage aids in paper industry, soil conditioners, oil-water separators, mineral flotation agents, etc. However, polymer aqueous systems with high solid content or high molecular weight are generally in a gel state and have a high apparent viscosity, which brings difficulties to post-processing and storage. Therefore, how to prepare an aqueous polymer system with high solid content and low viscosity and good storage stability has become a thorny problem faced by those skilled in the art. [0003] Traditional methods for synth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F2/22C08F4/04C08F4/40
Inventor 武玉民陈庆芬于跃芹许军毕建美马祖余陈爱砚
Owner QINGDAO UNIV OF SCI & TECH
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