Efficient long-lasting antibacterial waterborne top coating

A water-based topcoat, long-lasting technology, used in biocide-containing paints, antifouling/underwater coatings, coatings, etc., can solve the problems of non-lasting antibacterial effect, easy degradation, uneven dispersion, etc., and achieve good fullness , Good, efficient and durable antibacterial effect

Inactive Publication Date: 2019-03-29
SHAOGUAN HEZHONG CHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the technical problems described, the present invention overcomes the shortcomings of physical external antibacterial agents such as unsustainable antibacterial effect, uneven dispersion, and easy degradation.

Method used

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  • Efficient long-lasting antibacterial waterborne top coating
  • Efficient long-lasting antibacterial waterborne top coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Special polyurethane modified acrylic water-based resin X, its preparation process is as follows:

[0034] a. In a four-port reactor equipped with a thermometer, a condenser, and an agitator, add 2.1 parts of 2-butyl-2-ethyl-1,3-propanediol and 2.0 parts of trimethylolpropane in sequence according to the weight of the formula , 8.4 parts of polycarbonate polyol, heated to 90-105°C for vacuum dehydration for 1.0-1.5 hours, then added 2.0 parts of dimethylol propionic acid for vacuum dehydration for 0.5-1.0 hours;

[0035] b. Cool down to 60-65°C and add 0.05 parts of dibutyltin dilaurate, then slowly add 8.5 parts of hexamethylene diisocyanate for 0.5-1 hour, control the temperature at 70-75°C, then raise the temperature to 82- React at 85°C for 2 to 2.5 hours, add 4.8 parts of butyl methacrylate and 5.0 parts of methyl methacrylate to adjust the viscosity, cool down to 75°C, add 2.5 parts of hydroxy Schiff base and 1.0 part of hydroxyethyl acrylate, continue the reactio...

Embodiment 2

[0039] Special polyurethane modified acrylic water-based resin Y, its preparation process is as follows:

[0040] a. In a four-port reactor equipped with a thermometer, a condenser, and an agitator, add 2.5 parts of 2,4-diethyl-1,5-pentanediol and 1.8 parts of trimethylolpropane in sequence according to the weight of the formula 1. 6.2 parts of polytetrahydrofuran polyol, heated to 90-105°C for vacuum dehydration for 1.0-1.5 hours, then added 2.0 parts of dimethylol propionic acid for vacuum dehydration for 0.5-1.0 hours;

[0041] b. Cool down to 60-65°C and add 0.05 parts of dibutyltin dilaurate, then slowly add 10.0 parts of hexamethylene diisocyanate for 0.5-1 hour, control the temperature at 70-75°C, then raise the temperature to 82- React at 85°C for 2 to 2.5 hours, add 4.8 parts of lauryl methacrylate, 2.0 parts of isobutyl methacrylate, and 4.0 parts of methyl methacrylate to adjust the viscosity, cool down to 75°C, add 2.8 parts of hydroxyl Schiff base and 1.1 parts o...

Embodiment 3

[0045] A high-efficiency and durable antibacterial water-based topcoat, which consists of: special polyurethane modified acrylic water-based resin X 60.0 parts, water-based acrylic resin 18.0 parts, leveling agent 0.3 parts, wetting agent 0.3 parts, defoamer 0.3 parts, 0.3 parts of thickening and anti-settling agent, 4.0 parts of film-forming aid, 0.3 parts of multifunctional additive, and 16.5 parts of distilled water.

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Abstract

The invention relates to efficient long-lasting antibacterial waterborne top coating free of an additionally added external antibacterial agent. The basic formula of the top coating includes, by weight, 50.0-65.0 parts of special polyurethane modified acrylic waterborne resin, 12.0-22.0 parts of waterborne acrylic resin, 0-16.0 parts of nanometer aqueous color paste, 3.0-5.0 parts of a film forming auxiliary agent, 0.2-0.6 part of a leveling agent, 0.1-0.8 part of a wetting agent, 0.2-0.6 part of a defoamer, 0.3-1.5 parts of a thickening and anti-settling agent, 0.2-0.8 part of a multifunctional auxiliary agent and 10.0-25.0 parts of distilled water. The top coating combines the characteristics of the polyurethane resin, the acrylic resin and a Schiff base structure; a Schiff base antibacterial group is fixed to the polyurethane modified acrylic waterborne resin by chemical bonding; and the polyurethane modified acrylic waterborne resin contains the Schiff base structure so that no external antibacterial agent is needed when the when polyurethane modified acrylic waterborne resin is used as a film forming substance of antibacterial coating. In addition, the waterborne acrylic resinis added so that coating film has good fullness and a high-efficiency long-lasting antibacterial property.

Description

technical field [0001] The invention relates to a water-based paint, and further relates to a high-efficiency and durable antibacterial water-based topcoat, which belongs to the technical field of water-based functional paints. Background technique [0002] With the improvement of people's living standards, the development direction of modern coatings is high performance, high efficiency, high environmental protection, low pollution, pollution-free, energy saving, multi-functional, and meets the requirements of sustainable development. Traditional solvent-based coatings cannot meet the requirements of environmental protection and will be replaced by environmentally friendly coatings. [0003] However, coatings with excellent environmental performance are mostly water-based, and the system contains more organic matter, which provides a rich material basis for the growth and reproduction of microorganisms. Microbes use these nutrients to undergo biodegradation, biochemical sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D151/08C09D133/00C09D5/14C08F283/00C08F220/14C08F220/18C08G18/67C08G18/66C08G18/48C08G18/44C08G18/32C08G18/34
CPCC09D151/08C08F283/008C08G18/44C08G18/4854C08G18/672C09D5/14C08G18/6677C08G18/6692C08G18/6644C08G18/6659C08F220/1812C08F220/1804
Inventor 张武许钧强康伦国姚东生阳京辉
Owner SHAOGUAN HEZHONG CHEM CO LTD
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