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Preparation of zinc pyrithione ZnO emulsion

A technology of zinc pyrithione and zinc oxide, applied in biocide-containing paints, botanical equipment and methods, chemicals for biological control, etc., can solve the problem of stability, transportation and storage of zinc pyrithione zinc oxide emulsion and issues such as the impact of using

Inactive Publication Date: 2018-10-02
台州米罗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] There are very few reports on the preparation of zinc pyrithione zinc oxide emulsion. Since the density of zinc pyrithione is 1.76 g / cm3 and the density of zinc oxide is 5.606 g / cm3, the prepared zinc pyrithione zinc oxide emulsion The stability of the product has a significant impact on the transportation, storage and use of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step (1). Add 300 grams of zinc pyrithione, 200 grams of zinc oxide and 500 grams of water into the grinding equipment, add 30 grams of polycarboxylate high-performance water reducer (SUNBO PC-1016), grind for 6 hours, and measure D. 90 750nm, finish the grinding to get zinc pyrithione zinc oxide superfine solution.

[0023] Step (2). Add 5 grams of hydroxyethyl cellulose to the obtained zinc pyrithione / zinc oxide ultrafine solution, stir for 1 hour, and mix well.

[0024] Step (3). The ultrafine solution of zinc pyrithione / zinc oxide in step (2) is adjusted to pH 8.5 with 20% sodium hydroxide solution, heated to 80 degrees, stirred for 2.5 hours, then cooled to 30 degrees to obtain Zinc Pyrithione Zinc Oxide Emulsion.

[0025] Step (4). The zinc pyrithione zinc oxide emulsion prepared above is placed in a wide-mouthed reagent bottle, and the stability investigation is carried out for three months at 4 degrees, 25 degrees and 37 degrees respectively and protected from...

Embodiment 2

[0027] Step (1). Add 450 grams of zinc pyrithione, 100 grams of zinc oxide and 450 grams of water into the grinding equipment, add 15 grams of dispersant MF, grind for 8 hours, and record D 90 It was 680nm, and the grinding was completed to obtain an ultrafine liquid of zinc pyrithione and zinc oxide.

[0028] Step (2). Add 5 grams of carbomer resin to the obtained zinc pyrithione zinc oxide ultrafine liquid, stir for 5 hours, and mix well.

[0029] Step (3). Adjust the pH of the pyrithione zinc zinc oxide superfine solution of step (2) to 9.5 with 25% sodium hydroxide solution, heat to 85 degrees, stir for 1 hour, then cool to 25 degrees to obtain pyridine Zinc Thione Zinc Oxide Emulsion.

[0030] Step (4). The zinc pyrithione zinc oxide emulsion prepared above is placed in a wide-mouthed reagent bottle, and the stability investigation is carried out for three months at 4 degrees, 25 degrees and 37 degrees respectively and protected from light. After the investigation, Ther...

Embodiment 3

[0032] Step (1). Add 350 grams of zinc pyrithione, 180 grams of zinc oxide and 470 grams of water into the grinding equipment, add 12 grams of WDG dispersant (product model D1008, produced by Beijing Hammock Chemical Technology Co., Ltd.), grind 9 hours, measured D 90 It was 720nm, and the grinding was completed to obtain an ultrafine liquid of zinc pyrithione and zinc oxide.

[0033] Step (2). Add 2 grams of carbomer resin, 1 gram of hydroxyethyl cellulose and 2 grams of guar gum to the obtained zinc pyrithione zinc oxide ultrafine liquid, stir for 4 hours, and mix well.

[0034] Step (3). After adjusting the pH of the pyrithione zinc zinc oxide superfine solution of step (2) to 10.5 with 30% sodium hydroxide solution, heat to 82 degrees, stir for 0.5 hours, and then cool to 35 degrees to obtain pyridine Zinc Thione Zinc Oxide Emulsion.

[0035] Step (4). The zinc pyrithione zinc oxide emulsion prepared above is placed in a wide-mouthed reagent bottle, and the stability inv...

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Abstract

The invention discloses preparation of a zinc pyrithione ZnO emulsion having good stability, wherein the zinc pyrithione ZnO emulsion is free of layering and separation of water at an upper layer after observation by naked eyes after stabilization test for three months, and is free of flocculation and precipitation when being poured out from a container and flowing. The preparation particularly includes steps of: adding zinc pyrithione, zinc oxide and water into a grinding device and adding a dispersant to grind the material until D90 is less than 800 nm; adding a thickener to the prepared zinc pyrithione ZnO ultrafine liquid and stirring the liquid for 1-5 h to uniformly mix the components; regulating pH of the thickened zinc pyrithione ZnO ultrafine liquid with a concentrated NaOH solution to 8-11, heating the liquid to 80-85 DEG C, and stirring the liquid for 0.5-3 h; cooling the liquid to room temperature to prepare the zinc pyrithione ZnO emulsion.

Description

technical field [0001] The invention belongs to the technical field of chemistry and chemical engineering, and in particular relates to the preparation of zinc pyrithione zinc oxide emulsion. Background technique [0002] Zinc pyrithione is an antibacterial and antifungal agent, which has a significant inhibitory effect on fungi and bacteria. Its chemical name is bis(2-thio-1-pyridine oxide) zinc, which is composed of 2-chloropyridine-N-oxide It is obtained by reacting with sodium hydrosulfide under alkaline conditions, and then reacting with inorganic zinc salts. It is widely used in the fields of washing cosmetics, civil coatings, adhesives and carpets, etc. [0003] In the production of paint, antifungal agents and fungicides are added to inhibit the growth of microorganisms on the surface of the paint and prevent the degradation of the paint. Zinc pyrithione zinc oxide emulsion can effectively improve the protective effect of coating layer and object surface. It is repo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01N43/40A01P1/00A01P3/00C09D5/14C09J11/06
CPCA01N43/40A01N59/16C09D5/14C09J11/06
Inventor 颜国和
Owner 台州米罗科技有限公司
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