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Zinc pyrithione ultrafine particles for sterilization and mildew prevention of water-based paint and preparation method thereof

A technology of zinc pyrithione and ultra-fine particles, applied in antifouling/underwater coatings, paints containing biocides, etc., can solve the problems of poor dispersibility, easy to agglomerate, etc., and achieve easy separation, dispersion and uniformity. The effect of good degree and good affinity

Inactive Publication Date: 2018-05-01
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the smaller the particle size, the easier it is to agglomerate, and the dispersion will be poor, so it is very important to solve the dispersion problem of ultrafine particles

Method used

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  • Zinc pyrithione ultrafine particles for sterilization and mildew prevention of water-based paint and preparation method thereof
  • Zinc pyrithione ultrafine particles for sterilization and mildew prevention of water-based paint and preparation method thereof
  • Zinc pyrithione ultrafine particles for sterilization and mildew prevention of water-based paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation method of the ultrafine particles of pyrithione zinc for sterilization and mildew prevention of water-based paints involved in this embodiment is based on figure 1 Shown reaction device structure, it may further comprise the steps:

[0041] 1. Prepare a certain concentration of zinc sulfate solution and sodium pyrithione solution in two reaction liquid preparation tanks, and then enter their respective solution storage tanks through purifiers;

[0042] 2. Add a certain quality of acrylic polymer surfactant into the zinc sulfate solution storage tank, and mix it statically for 20 minutes to 60 minutes;

[0043] 3. The zinc sulfate solution and the sodium pyrithione solution are pressurized by the metering pump respectively and then enter the feed port of the reactor, where they collide with each other at a certain flow rate and precipitate at a high speed in the reactor channel;

[0044] 4. The reaction product is filtered and washed by the plate and fra...

Embodiment 2

[0046] The ultrafine particles of zinc pyrithione used for sterilization and mildew prevention of water-based paints involved in this example adopt the preparation method described in Example 1, and the difference is the reaction parameters, as shown in the following table:

[0047]

[0048] Evaluate the zinc pyrithione wet solid product obtained in the above examples 2.1 to 2.3, evaluate the dispersion of the product by adding the product to the water-based acrylic paint, evaluate the particle size distribution of the product by a Malvern laser particle size analyzer, and scan The average particle size and particle appearance of the product were evaluated by electron microscope, and the results are as follows:

[0049] The wet solid product of zinc pyrithione obtained in embodiment 2.1 can be uniformly dispersed in water-based acrylic paint, such as figure 2 The product granules shown have a narrow particle size distribution, such as image 3 The product shown has unifor...

Embodiment 3

[0053] The following examples relate to the preparation of zinc pyrithione particles using different processes using the same raw material concentration, proportioning ratio and reaction parameters as in Example 2.2;

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Abstract

The invention relates to a preparation method of zinc pyrithione ultrafine particles used for sterilization and mildew prevention of water-based paints. The method is to transport zinc sulfate solution and sodium pyrithione solution to the reactor for reaction to produce ultrafine particles of zinc pyrithione, and add acrylic polymer surface active particles to the zinc sulfate solution before transporting to the reactor. agent to realize the in-situ modification of the newly formed zinc pyrithione ultrafine particles during the reaction process, thereby improving the dispersibility in water-based paints. The zinc pyrithione ultrafine particles produced by the invention have the characteristics of small particle size and narrow particle size distribution, and at the same time improve the dispersibility and stability of the zinc pyrithione in the water-based paint, and improve the effect of sterilization and mildew prevention.

Description

technical field [0001] The invention relates to a preparation method of zinc pyrithione ultrafine particles, in particular to a preparation method of zinc pyrithione ultrafine particles used for sterilization and mildew prevention of water-based paints. Background technique [0002] Water-based coatings are various water-based resin coatings with water-based varnishes as the main body, including water-based acrylate coatings, water-based polyurethane coatings, water-based alkyd resin coatings, etc., among which water-based acrylate coatings are the majority. In water-based coatings, "water" replaces or mostly replaces "organic solvents" that often cause various problems in other types of coatings. Using water as a dispersion medium, water-based coatings have the following advantages: no fire hazards, low production costs, It can be diluted and cleaned with water, and has relatively wide operating requirements. Workers in the paint industry are less or not affected by the pot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/14
Inventor 胡永琪崔蕊刘润静赵风云刘亚青李飞龙段晓宇张丽喆
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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