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Water-based polyacrylate antibacterial emulsion, preparation method and application thereof in paint

A polyacrylate and acrylate technology, which is applied in the field of water-based polyacrylate antibacterial emulsion and its preparation, can solve the problems of reduction, poor solubility of isothiazolinone derivatives, poor compatibility of water-based emulsions or coatings, and the like. Achieving good mold resistance, reducing dosage, and good particle size distribution

Pending Publication Date: 2021-01-29
广东迪美生物技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although isothiazolinone compounds have been widely used in water-based coatings, there are still some problems that restrict their application: first, some isothiazolinone derivatives have poor solubility in water, so they are compatible with water-based emulsions or coatings. Second, most of the isothiazolinone derivatives are small molecules, which are easy to migrate in the material and greatly reduce the antibacterial persistence; in addition, they are limited by PH<9 and high temperature stability

Method used

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  • Water-based polyacrylate antibacterial emulsion, preparation method and application thereof in paint
  • Water-based polyacrylate antibacterial emulsion, preparation method and application thereof in paint
  • Water-based polyacrylate antibacterial emulsion, preparation method and application thereof in paint

Examples

Experimental program
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Effect test

Embodiment 1

[0040] A kind of water-based polyacrylate antibacterial emulsion (emulsion A), water-based polyacrylate antibacterial emulsion is obtained by following raw material reaction by weight:

[0041]

[0042]

[0043] The preparation of containing isothiazolinone base monomer comprises the following steps:

[0044] a. Add 3.28g of sodium hydroxide, 160mL of water and 10.0g of 1,2-benzisothiazolin-3-one to the flask in sequence, and mix thoroughly to form 1,2-benzisothiazolin-3-one stable sodium salt;

[0045] b. Then add 24.8g of 2-bromoethanol to the sodium salt in step a, reflux the reaction in an oil bath at 80°C for 3h, add dichloromethane to extract after the reaction, dry with anhydrous sodium sulfate, filter and distill to obtain Yellow solid, after dissolving the light yellow solid in 120mL tetrahydrofuran, add 7.35g triethylamine.

[0046] c. Add 7.58g of methacryloyl chloride dropwise to the tetrahydrofuran solution in step b within 1 hour in an ice-water bath, rea...

Embodiment 2

[0072] A kind of water-based polyacrylate antibacterial emulsion (emulsion B), water-based polyacrylate antibacterial emulsion is obtained by following raw material reaction by weight:

[0073]

[0074] The preparation of containing isothiazolinone base monomer comprises the following steps:

[0075] a. Add 3.50g of sodium hydroxide, 150mL of water and 10.0g of 1,2-benzisothiazolin-3-one to the flask in sequence, and mix thoroughly to form 1,2-benzisothiazolin-3-one stable sodium salt;

[0076] b. Then add 25.5g of 2-bromoethanol to the sodium salt in step a, reflux the reaction in an oil bath at 80°C for 3h, add dichloromethane to extract after the reaction, dry with anhydrous sodium sulfate, filter and distill to obtain Yellow solid, after dissolving the light yellow solid in 130mL tetrahydrofuran, add 6.5g triethylamine.

[0077] c. Add 8.50 g of methacryloyl chloride dropwise to the tetrahydrofuran solution in step b within 1 hour in an ice-water bath, react overnight...

Embodiment 3

[0098] A kind of water-based polyacrylate antibacterial emulsion (emulsion C), water-based polyacrylate antibacterial emulsion is obtained by following raw material reaction by weight:

[0099]

[0100] The preparation of containing isothiazolinone base monomer comprises the following steps:

[0101] a. Add 4.0g of sodium hydroxide, 155mL of water and 8.0g of 1,2-benzisothiazolin-3-one to the flask in sequence, and mix thoroughly to form 1,2-benzisothiazolin-3-one stable sodium salt;

[0102] b. Then add 22.5g of 2-bromoethanol to the sodium salt in step a, reflux the reaction in an oil bath at 80°C for 3h, add dichloromethane to extract after the reaction, dry with anhydrous sodium sulfate, filter and distill to obtain Yellow solid, after dissolving the light yellow solid in 130mL tetrahydrofuran, add 8.0g triethylamine.

[0103] c. Add 10.0 g of methacryloyl chloride dropwise to the tetrahydrofuran solution in step b within 1 hour in an ice-water bath, react overnight, fi...

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Abstract

The invention discloses a water-based polyacrylate antibacterial emulsion, which is obtained by reaction of the following raw materials: 3-6 g of an isothiazolinone group-containing monomer, 24-30 g of an acrylate monomer, 0.5-1g of nonylphenol polyoxyethylene (4) ether ammonium sulfate, 7.0-8.0g of ammonium persulfate and 60-80g of deionized water. The isothiazolinone group-containing monomer isobtained by reaction of 1, 2-benzisothiazolin-3-one, 2-bromoethanol and methacryloyl chloride. The invention also discloses a preparation method of the water-based polyacrylate antibacterial emulsion.The water-based polyacrylate emulsion obtained by pre-emulsification, polymerization, curing, post-treatment and other steps on the isothiazolinone group-containing monomer and the acrylate monomer by taking water as a solvent is uniform in dispersion, good in particle size distribution, stable in compatibility and good in compatibility, and meanwhile, has good antibacterial property and mold resistance, the antibacterial rate is greater than 99.9%, and the mold-proof grade can reach 0 grade; the water-based polyacrylate emulsion can be directly used as a bactericide in water-based paint, andcan also be compounded with common emulsions for water-based paint, like polyacrylic acid, polyurethane or epoxy resin, so that the additive amount of the bactericide is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of functional polymer materials, in particular to a water-based polyacrylate antibacterial emulsion, a preparation method thereof and an application in coatings. Background technique [0002] With the improvement of people's awareness of safety and environmental protection, traditional oil-based paints are gradually withdrawing from the market, and water-based paints are getting more and more attention from the market. Compared with traditional oil-based paints, water-based paints are particularly vulnerable to microorganisms, especially bacteria and The erosion of mold will lead to problems such as poor fluidity, pH value change, color change, odor emission, coagulation and even demulsification, which will affect its performance; Mildew, discoloration and even odor, so water-based paints often need to add preservatives to inhibit the growth of microorganisms. Isothiazolinone derivatives are a series of co...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F220/14C08F220/38C09D133/08C09D5/14C07D275/03
CPCC08F220/18C08F220/14C09D133/14C09D5/14C07D275/03C08K2003/2241C08K2003/265
Inventor 刘永龙陶宏兵宋天龙林家洪黄泽彬沈康伦黄小茉
Owner 广东迪美生物技术有限公司
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