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Pyrithionc zinc ultrafine grain for aqueous coating sterilization and mildew prevention, and its preparation method

A technology of zinc pyrithione and ultrafine particles, which can be used in antifouling/underwater coatings and biocide-containing paints, etc. It can solve the problems of easy agglomeration and poor dispersion, and achieve good uniformity and easy separation and dispersion, easy dispersion effect

Inactive Publication Date: 2014-12-17
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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  • Pyrithionc zinc ultrafine grain for aqueous coating sterilization and mildew prevention, and its preparation method
  • Pyrithionc zinc ultrafine grain for aqueous coating sterilization and mildew prevention, and its preparation method
  • Pyrithionc zinc ultrafine grain for aqueous coating sterilization and mildew prevention, and its preparation method

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 a pyrithionc zinc ultrafine grain for aqueous coating sterilization and mildew prevention. The method comprises the following steps: conveying a zinc sulfate solution and a sodium pyrithione solution into a reactor, and reacting to prepare the pyrithionc zinc ultrafine grain. An acrylic polymer surfactant is added to the zinc sulfate solution before the zinc sulfate solution is conveyed into the reactor to realize the in situ modification of the newly generated pyrithionc zinc ultrafine grain in the reaction process in order to improve the dispersion of the pyrithionc zinc ultrafine grain in an aqueous coating. The pyrithionc zinc ultrafine grain produced in the invention has the characteristics of small particle size, narrow particle size distribution, increase of the dispersion and stability in the aqueous coating, and improvement of the sterilization and mildew prevention effects.

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 Applications(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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