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Nano-alumina antibacterial coating and preparation method thereof

A technology of nano-alumina and antibacterial coatings, applied in antifouling/underwater coatings, polyurea/polyurethane coatings, coatings, etc. Fast release speed and other issues to achieve the effect of reducing the chance of infection and a wide range of applications

Inactive Publication Date: 2020-07-17
TIANJIN BOYUAN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic antibacterial agents mainly include silver-based antibacterial agents and nano-titanium dioxide-based antibacterial agents. Among them, silver-based antibacterial agents consume large amounts of bacteria, release silver ions quickly, are easily oxidized, and have a short duration of antibacterial activity. Nano-titanium dioxide-based antibacterial agents need to be used in Sunlight, especially under the irradiation of ultraviolet rays, can have a bactericidal effect, and the bactericidal effect is limited in the absence of light

Method used

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Examples

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preparation example Construction

[0032] A preparation method of water-based nano-alumina antibacterial coating, comprising the following steps:

[0033] Step 1. Add the curing agent and deionized water into the container, stir and disperse evenly (stirring speed and time are 500r / min and stir for 10-30min), and prepare the curing agent pre-dispersion;

[0034] Step 2. Add the curing agent pre-dispersion into the water-based cationic emulsion, and continue stirring to disperse evenly (stirring speed and time are 500r / min and stirring for 10-30min);

[0035] Step 3, then add the nano-alumina antibacterial agent to the dispersion obtained in step 2, continue to stir and disperse evenly (stirring speed and time are 500r / min and stir for 10-30min);

[0036] Step 4, adding each auxiliary agent into the dispersion liquid obtained in Step 3 in turn, stirring and dispersing evenly to make a water-based nano-alumina antibacterial coating.

[0037] A preparation method of powder nano-alumina antibacterial coating, comp...

Embodiment 1

[0044] Step 1. Add 10g of isocyanate curing agent and 50g of deionized water into the container, and stir at 500r / min for 20min to prepare isocyanate predispersion;

[0045] Step 2. Add 60g of isocyanate predispersion to 30g of water-based cationic polyurethane emulsion, and continue to stir at 500r / min for 10min;

[0046]Step 3, then add 5g of nano-alumina to the dispersion obtained in step 2, and continue to stir at 500r / min for 10min;

[0047] Step 4, then add 0.7g alcohol ester twelve, 0.2g silicone leveling agent, 0.2g silicone defoamer, 0.2g polyethylene glycol dispersant, 1g polyurethane thickener, 0.2g isothiazolinone Derivative preservatives and 2.5 g of ethylene glycol antifreeze were added to the dispersion obtained in step 3, and stirred at 500 r / min for 30 min to prepare a water-based nano-alumina antibacterial coating.

[0048] The above-mentioned water-based nano-alumina antibacterial paint can further prepare an antibacterial paint film, which is used for wood...

Embodiment 2

[0050] Step 1, add 10g of amino resin and 50g of deionized water into the container, stir at 500r / min for 20min, and prepare the amino resin pre-dispersion;

[0051] Step 2. Add 60g of amino resin predispersion to 20g of water-based cationic acrylate emulsion, and continue to stir at 500r / min for 10min;

[0052] Step 3, then add 10g of nano-alumina to the dispersion obtained in step 2, and continue to stir at 500r / min for 10min;

[0053] Step 4. Add 5g alcohol ester twelve, 0.2g silicone leveling agent, 0.2g silicone defoamer, 0.4g polyethylene glycol dispersant, 1.5g acrylate thickener, 0.2g isothiazoline Add ketone derivative preservative and 2.5g ethylene glycol antifreeze to the dispersion liquid obtained in step 3, and stir at 500r / min for 30min to make a water-based nano-alumina antibacterial coating.

[0054] The above-mentioned water-based nano-alumina antibacterial paint can further prepare an antibacterial paint film, which is used for plastic topcoats, and the anti...

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Abstract

The invention relates to a nano-alumina antibacterial coating and a preparation method thereof. The coating is technically characterized in that the antibacterial coating is composed of the raw material components in parts by mass: 10%-50% of nano-alumina, 30%-80% of a water-based cationic emulsion, 5%-50% of a curing agent, 0.5%-8% of a coalescing agent, 0.05%-0.3% of a leveling agent, 0.05%-0.5%of a defoaming agent, 0.1%-0.4% of a dispersing agent, 0.5%-2% of a thickening agent, 0.1%-0.3% of a preservative, 2%-8% of an anti-freezing agent and the balance being deionized water. The nano-alumina antibacterial coating is a water-based nano-alumina antibacterial coating or a powder nano-alumina antibacterial coating. According to the invention, the nano-alumina and the water-based cationicemulsion are used for synergistically resisting bacteria; the prepared antibacterial coating is a non-consumable structural antibacterial coating, has long-acting sterilization and bacteriostasis functions, coats the surfaces of plastic, wood, fibers, metals, stone, paper and other materials, has a sterilization rate of greater than or equal to 99%, plays an effective role in protecting human health, and greatly reduces the probability of disease infection of people.

Description

technical field [0001] The invention belongs to the technical field of antibacterial coatings, in particular to a nano-alumina antibacterial coating and a preparation method thereof. Background technique [0002] As a protective, decorative, and bonding material, coatings are widely used in the fields of vehicles, decoration, aerospace, transportation, construction, and home furnishing. Since bacteria are ubiquitous in the living environment, coatings are applied to the substrate and therefore also breed bacteria and microorganisms. With the gradual improvement of people's awareness of environmental protection and safety, the demand for functional antibacterial coatings is becoming more and more urgent. [0003] Traditional antibacterial coatings mainly include three categories: natural antibacterial agents, organic antibacterial agents and inorganic antibacterial agents. Inorganic antibacterial agents are non-toxic, tasteless, non-irritating, and have good thermal stabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D161/20C09D133/04C09D5/14
CPCC08K2003/2227C08K2201/011C09D5/14C09D133/04C09D161/20C09D175/04C08K3/22C08L33/04
Inventor 李春刚王毅李航康智慧宋赫滕飞鹿秀山
Owner TIANJIN BOYUAN NEW MATERIALS
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