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Method for preparing long-lasting antibacterial polyacrylate emulsion

A polyacrylic acid emulsion, long-lasting technology, applied in the direction of coating, etc., can solve the problems of poor emulsion stability, large emulsion particle size, difficult to filter, etc., and achieve the effects of durable antibacterial, high water absorption, and good freeze-thaw resistance

Inactive Publication Date: 2011-10-12
UNION FOSHAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The quaternary ammonium salt emulsifier belongs to the cationic emulsifier, and the single-use cationic emulsifier can fully exert the emulsification effect under acidic conditions. The molecular weight of the prepared emulsion cannot be too large, the particle size of the emulsion is large, the emulsion is white, and has no blue light. There are many residues and it is difficult to filter. This is because the side reaction of ammonium in the polymerization process makes the molecular weight small and the stability of the emulsion is poor.

Method used

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  • Method for preparing long-lasting antibacterial polyacrylate emulsion
  • Method for preparing long-lasting antibacterial polyacrylate emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 1) Add 30 parts of deionized water, 2 parts of AMC12AB-AEO15 emulsifier, methyl methacrylate and butyl acrylate into a four-port reaction vessel equipped with a speed-adjustable stirrer, reflux tube, dropping funnel and thermometer 10 parts of mixed monomers, 1.7 parts of acrylic acid monomers, 1 part of acrylamide monomers, 2 parts of β-hydroxyethyl acrylate monomers, 1.05 parts of pH buffer solution; heat up and emulsify under high-speed stirring at 1200-1300rpm to obtain milky white Pre-emulsified mixed monomer emulsion;

[0046] 2) When the temperature rises to 75°C, reduce the speed to 800rpm, add 0.05 parts of initiator dropwise, and when the temperature rises to 80°C, the reaction is initiated, and blue light appears; Note: The initiator is pre-prepared with 5% aqueous solution

[0047] 3) When there is no reflux in the reaction, add the remaining mixed monomer and initiator solution dropwise at the same time, keep the temperature at 81-83° C., and finish droppin...

Embodiment 2

[0049]1) Add 30 parts of deionized water, 2.05 parts of AMC12AB-AEO15 emulsifier, methyl methacrylate and butyl acrylate into a four-port reaction vessel equipped with a speed-adjustable stirrer, reflux tube, dropping funnel and thermometer 10 parts of mixed monomer, 1.8 parts of acrylic acid monomer, 1 part of acrylamide monomer, 2 parts of β-hydroxyethyl acrylate monomer, 2 parts of allyl glycidyl ether, 1.06 parts of pH buffer solution; ~1300rpm high-speed stirring to emulsify to obtain a milky white pre-emulsified mixed monomer emulsion;

[0050] 2) When the temperature rises to 75°C, reduce the speed to 800rpm, add 0.06 parts of initiator dropwise, and when the temperature rises to 80°C, the reaction is initiated, and blue light appears; Note: The initiator is pre-prepared with 5% aqueous solution

[0051] Step 3) Referring to Example 1, the milky white liquid with a solid content of 46.2% was obtained.

Embodiment 3

[0053] 1) Add 30 parts of deionized water, 2.05 parts of AMC12AB-AEO15 emulsifier, methyl methacrylate and butyl acrylate into a four-port reaction vessel equipped with a speed-adjustable stirrer, reflux tube, dropping funnel and thermometer 10 parts of mixed monomer, 1.8 parts of acrylic acid monomer, 1 part of acrylamide monomer, 2 parts of β-hydroxyethyl acrylate monomer, 2 parts of glycidyl methacrylate, 1.06 parts of pH buffer solution; ~1300rpm high-speed stirring to emulsify to obtain a milky white pre-emulsified mixed monomer emulsion;

[0054] 2) When the temperature rises to 75°C, reduce the speed to 800rpm, add 0.06 parts of initiator dropwise, and when the temperature rises to 80°C, the reaction is initiated, and blue light appears; Note: The initiator is pre-prepared with 5% aqueous solution

[0055] Step 3) Referring to Example 1, the milky white liquid with a solid content of 45.8% was obtained.

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Abstract

The invention relates to a method for preparing a long-lasting antibacterial polyacrylate emulsion. A polymerisable emulsifier containing cationic groups and nonionic groups serves as a main component; and the long-lasting antibacterial polyacrylate emulsion can be prepared through emulsion polymerization without compounding. The long-lasting antibacterial polyacrylate emulsion comprises the following components in part by weight: 25 to 40 parts of hard monomer, 20 to 30 parts of soft monomer, 1.5 to 5 parts of cross-linking agent, 0 to 5 parts of modifier, 1.5 to 3 parts of polymerisable emulsifier containing cationic groups and nonionic groups, 1 to 2 parts of pH value buffer, 0.2 to 0.5 part of initiator and 45 to 55 parts of deionized water. Antibacterial groups are fixed on a resin structure in a way of chemical bonds, so the defect of adding an antibacterial agent by a physical method is overcome, and the emulsion is not easy to erase and dissolve and has a long-lasting antibacterial effect. At the same time, the emulsion also has very high freeze thawing resistance, water resistance, weather resistance, contamination resistance, storage stability and stability of electrolyte resistance; moreover, a dope has a long-lasting antibiotic property after the long-lasting antibacterial polyacrylate emulsion is added into the dope without additional addition of other antibacterial agents.

Description

technical field [0001] The invention relates to a preparation method of a durable antibacterial polyacrylic acid emulsion. The polyacrylic acid emulsion prepared by the invention is applied to coatings, and the coatings can have antibacterial properties without additional addition of other antibacterial auxiliary agents. Background technique [0002] Antibacterial coatings refer to a class of coatings that add antibacterial agents to make them have antibacterial properties. Because they can kill molds and bacteria such as Escherichia coli and Staphylococcus, they can improve the indoor environment and protect people's health. Its research and Apps get a lot of attention. Antibacterial agents can be divided into three categories: natural, organic, and inorganic: natural antibacterial agents include extracts such as chitosan and natural extracts; organic fungicides include organic acids, benzoimidazoles, phenols, and isothiazolinones etc.; Inorganic antibacterial agents are d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/14C08F220/06C08F220/28C08F220/60C08F283/06C08F2/30C08F2/28C09D133/08C09D151/08
Inventor 许钧强康伦国
Owner UNION FOSHAN CHEM
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