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Manufacturing process of nano antibacterial and mildew-proof waterborne polyurethane coating

A water-based polyurethane, antibacterial and anti-mildew technology, applied in the field of coatings, can solve the problems of inability to resist microorganisms, inability to maintain the coating effect for a long time, etc., and achieve the effects of reducing the reproduction speed, good anti-mildew performance, and physical health protection

Inactive Publication Date: 2021-05-11
甘彤
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a nano-antibacterial and anti-mildew water-based polyurethane coating manufacturing process, which has the advantages of anti-bacterial and anti-mildew, and solves the problem that the existing water-based polyurethane coating cannot resist the invasion of microorganisms and cannot maintain the finishing effect for a long time

Method used

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  • Manufacturing process of nano antibacterial and mildew-proof waterborne polyurethane coating
  • Manufacturing process of nano antibacterial and mildew-proof waterborne polyurethane coating
  • Manufacturing process of nano antibacterial and mildew-proof waterborne polyurethane coating

Examples

Experimental program
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Effect test

Embodiment 1

[0026] First select 80 parts of water-based polyurethane and put it into the reactor for heating, then add 2 parts of antibacterial agent and 1 part of antifungal agent, heat to 85°C, then add 1 part of thickener, 2 parts of light stabilizer, and 0.5 part of defoamer and 1.5 parts of leveling agent, then heated and stirred, heated to 100°C, cooled to room temperature to obtain a mixture for later use, then added 1 part of dyeing agent, 1.5 parts of dispersant and 6 parts of film-forming aid to the mixture, at 120°C Disperse at a speed of 1800r / min for 20 minutes at a certain temperature, and then filter to obtain a nano-antibacterial and mildew-proof waterborne polyurethane coating.

Embodiment 2

[0028] In embodiment one, add following operation:

[0029] The antibacterial agent adopts nano titanium dioxide, and the antifungal agent adopts benzothiazol-3-one antifungal agent.

[0030] First select 90 parts of water-based polyurethane and put it into the reactor for heating, then add 3 parts of antibacterial agent and 2 parts of antifungal agent, heat to 85°C, then add 1 part of thickener, 2 parts of light stabilizer and 0.5 part of defoamer and 1.5 parts of leveling agent, then heated and stirred, heated to 100°C, cooled to room temperature to obtain a mixture for later use, then added 1 part of dyeing agent, 1.5 parts of dispersant and 6 parts of film-forming aid to the mixture, at 120°C Disperse at a speed of 1800r / min for 20 minutes at a certain temperature, and then filter to obtain a nano-antibacterial and mildew-proof waterborne polyurethane coating.

Embodiment 3

[0032] In embodiment two, add following operation:

[0033] The thickener is any one of hydroxyethyl cellulose or non-ionic associative thickeners, and the light stabilizer is any one of benzophenones, salicylates and benzotriazoles kind.

[0034] First select 95 parts of water-based polyurethane and put it into the reactor for heating, then add 4 parts of antibacterial agent and 2 parts of antifungal agent, heat to 90°C, then add 1 part of thickener, 2 parts of light stabilizer and 0.5 part of defoamer and 1.5 parts of leveling agent, then heated and stirred, heated to 100°C, cooled to room temperature to obtain a mixture for later use, then added 1 part of dyeing agent, 1.5 parts of dispersant and 6 parts of film-forming aid to the mixture, at 120°C Disperse for 25 minutes at a speed of 2000r / min at a certain temperature, and then filter to obtain a nano-antibacterial and mildew-proof waterborne polyurethane coating.

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Abstract

The invention discloses a manufacturing process of a nano antibacterial and mildew-proof waterborne polyurethane coating, which comprises the following steps: firstly, selecting a proper amount of waterborne polyurethane, putting the waterborne polyurethane into a reaction kettle, heating, then adding an antibacterial agent and a mildew-proof agent, heating to 70-90 DEG C, then adding a thickening agent, a light stabilizer, a defoaming agent and a flatting agent, heating to 80-100 DEG C, cooling to room temperature, and adding a coloring agent, a dispersing agent and a coalescing agent into the mixture. The waterborne polyurethane coating prepared by adopting the preparation method disclosed by the invention can have good antibacterial performance and mildew-proof performance, can reduce the breeding speed of microorganisms in the coating, can ensure the viscosity of the coating, cannot damage film-forming substances in the coating, and can ensure a good coating effect of the coating; and nano titanium dioxide is adopted as an antibacterial agent, and benzothiazole-3-ketone is adopted as an anti-mildew agent, so that environmental protection and non-toxicity can be realized, and great guarantee is provided for the body health of constructors and users.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a manufacturing process of nano-scale antibacterial and mildew-proof water-based polyurethane coatings. Background technique [0002] Water-based polyurethane is a new type of polyurethane system that uses water instead of organic solvents as the dispersion medium. Using water as the solvent has the advantages of no pollution, safety and reliability, excellent mechanical properties, good compatibility, and easy modification. However, the organic components in water-based polyurethane coatings It provides a rich material basis for the growth and reproduction of microorganisms. Microorganisms use these nutrients to undergo biodegradation, biochemical synthesis, metabolism in the body, obtain energy, and transform them into various substances of their own. This complex life process can simultaneously produce enzymes and organic acids. , and these metabolites can continuously destro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D5/14
CPCC08K2003/2241C08K2201/011C09D5/14C09D175/04C08K3/22C08K5/47
Inventor 甘彤
Owner 甘彤
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