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Preparation method of antibacterial water-borne wood composite coating

A technology for composite coatings and woodware, which can be used in antifouling/underwater coatings, wax coatings, polyurea/polyurethane coatings, etc., and can solve problems such as insufficient antibacterial performance

Inactive Publication Date: 2021-04-09
成都萃匀离环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem to be solved by the present invention: Aiming at the problem of insufficient antibacterial properties of wood coatings currently on the market, a preparation method of antibacterial water-based wood composite coatings is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] The preparation method of described modified polyparaffin wax emulsion is:

[0037] (1) Weigh 450-550kg of paraffin wax and 40-50kg of stearic acid respectively, add 1200-1500kg of water, and then add them into the emulsification tank. After the steam engine is heated to 85°C-95°C, turn off the steam and wait After the paraffin is completely dissolved, under the condition of stirring at a low speed of 100 to 200 r / min, the temperature is kept for 45 to 55 minutes; the stearic acid is one of calcium stearate, magnesium stearate and aluminum stearate;

[0038] (2) After step (1), under the high-speed stirring condition of 400-600r / min, the stirring time is 10-20 minutes, and the ammonia water weighing 40-60kg is slowly added to the emulsification tank. After the ammonia water is added, stir Stir at a speed of 200-300r / min for 10-20 minutes;

[0039] (3) After the treatment in step (2), start to lower the temperature and cool down, and discharge when the temperature drops...

Embodiment 1

[0041] In parts by weight, weigh 10 parts of silver nitrate, 20 parts of silica sol, 2 parts of sodium borohydride, 1 part of hydrazine hydrate, 1 part of glucose, and 120 parts of deionized water, and add silver nitrate to 1 / 3 mass of deionized water. In deionized water, stir at a speed of 120r / min for 5min at room temperature to obtain a silver nitrate solution, add sodium borohydride, hydrazine hydrate, and glucose to 1 / 3 of the mass of deionized water, and stir at a speed of 140r / min for 10min at room temperature to obtain a reducing agent solution, add the silica sol to the remaining 1 / 3 of the mass of deionized water, and stir at 200r / min for 10 minutes at room temperature to obtain a silica sol solution, slowly add the silver nitrate solution to the silica sol solution at a dropping rate of 4mL / min, Stir at 300r / min at room temperature for 20min to obtain a mixed solution, slowly add the reducing agent solution to the mixture at a rate of 2mL / min, stir and react at 240r / ...

Embodiment 2

[0049] In parts by weight, weigh 15 parts of silver nitrate, 30 parts of silica sol, 3 parts of sodium borohydride, 1.5 parts of hydrazine hydrate, 1.5 parts of glucose, and 180 parts of deionized water, and add silver nitrate to 1 / 3 of the mass of deionized water. In deionized water, stir at a speed of 130r / min for 7 minutes at room temperature to obtain a silver nitrate solution, add sodium borohydride, hydrazine hydrate, and glucose to 1 / 3 of the mass of deionized water, and stir at a speed of 150r / min for 11 minutes at room temperature to obtain a reducing agent solution, add the silica sol to the remaining 1 / 3 of the mass of deionized water, stir at 220r / min for 12.5min at room temperature to obtain a silica sol solution, slowly add the silver nitrate solution to the silica sol solution at a rate of 5mL / min , stirred at 325r / min at room temperature for 25min to obtain a mixed solution, slowly added the reducing agent solution at a rate of 3mL / min to the mixed solution, sti...

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Abstract

The invention relates to a preparation method of an antibacterial waterborne wood composite coating, and belongs to the technical field of wood coatings. The antibacterial waterborne wood composite coating is prepared by taking the waterborne polyurethane emulsion as a matrix emulsion and adding the nano-silver sol and the modified nano-zinc oxide, wherein a coating film formed by the waterborne polyurethane emulsion has good physical and mechanical properties, cold resistance and organic solvent resistance, a silver element and a zinc element have a micro-power effect, and the antibacterial waterborne wood composite coating has good antibacterial property. According to the method, bacteria can lose division and proliferation capacity and die by virtue of reservoir enterprise force, nano-silver can play a role of a catalytic active center, under the action of light, silver and water or air act, and generated active oxygen ion free radicals and hydroxyl free radicals have extremely high chemical activity and can react with the bacteria to destroy a DNA double-helix structure, so that the DNA double-helix structure is damaged, metabolism is disordered, and the effect of inhibiting or killing bacteria is achieved.

Description

technical field [0001] The invention relates to a preparation method of an antibacterial water-based wood composite coating, which belongs to the technical field of wood coatings. Background technique [0002] Wood coatings have perfect decorative and long-lasting protective properties for wood, so they are widely used in the coating and protection of wood. Traditional wood coatings, mainly solvent-based lacquer and polyurethane paint, contain a large amount of volatile organic compounds (VOC), which have serious pollution and toxicity problems, and waste resources and energy. With the increasingly stringent environmental protection regulations, new environmentally friendly coatings with low or zero VOC emissions have become a hot spot in the research and development of modern coatings for the purpose of reducing the load on the earth. Environmentally friendly coatings mainly include water-based coatings, powder coatings, high-solid coatings and radiation-cured coatings. W...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/14C09D175/04C09D191/06C09D7/61C09D7/63C09D7/65
CPCC08K2003/0806C08K2003/2241C08K2003/2296C08K2201/011C08L2205/035C09D5/14C09D175/04C09D7/61C09D7/63C09D7/65C09D7/67C08L91/06C08L71/02C08L83/04C08L1/286C08K13/06C08K9/06C08K9/04C08K3/08C08K3/22C08K3/34C08K5/098
Inventor 谭祖陆
Owner 成都萃匀离环保科技有限公司
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