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Bio-based bright water-based clear topcoat with lotus effect

A lotus leaf effect, bio-based technology, applied in biocide-containing paints, anti-fouling/underwater coatings, coatings, etc., can solve the problems of environmental damage, high surface tension of paint films, low gloss, etc., and achieve improved paint performance. Film hardness, excellent adhesion, and good flexibility

Inactive Publication Date: 2019-03-08
UNION FOSHAN CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Oil-based wood coatings use various organic solvents such as benzene, ketones, esters, ethers, etc. as dispersion media. And during the drying process, it will continue to volatilize into the air or be absorbed by the human body, which will seriously damage the environment and harm human health.
[0004] Chinese patent CN103333598A discloses a bright white topcoat with high hardness and high gloss for woodware. It uses polyester resin DP315 plus imported titanium dioxide to form a bright white topcoat as component A, and n-butyl ester, HX- 90B, etc. are formulated into component B, and n-butyl ester, propylene glycol methyl ether acetate, dimethyl carbonate, EGDA and xylene are formulated as diluents during construction to form component C, and components A, B, and C It is mixed and formulated into high-hardness, high-gloss glossy white topcoat for woodware; it contains more organic solvents, which does not meet the "green" development
[0005] Chinese patent CN102363705A discloses a water-based one-component full-gloss clear topcoat and a preparation method thereof. It adopts polyacrylic acid-modified polyurethane and water-based polyurethane dispersion to react through self-chemical crosslinking, and then mixes wetting agent, leveling agent, and disinfectant. A coating composed of foaming agent, film-forming aid, and water. Its biggest feature is that in addition to its solvent-based performance, it also includes environmental protection, low carbon, excellent gloss, excellent pollution resistance, and can solve conventional Water-based one-component full-gloss clear topcoat with poor compatibility with other water-based systems; however, the paint film has a high surface tension and is easily polluted by pollutants. The longer the time, the lower the gloss and poor durability
[0006] my country's water-based wood coatings started relatively late, the overall technical level is relatively backward, and its application is also limited. Compared with the performance of oil-based wood coatings, water-based wood coatings generally have problems such as poor water resistance and low gloss. Therefore, it is necessary to develop a hydrophobic The water-based wood clear topcoat with good water performance and high gloss has very important economic benefits and social value for promoting the comprehensive water-based of wood coatings and promoting the transformation and upgrading of wood coatings

Method used

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  • Bio-based bright water-based clear topcoat with lotus effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A bio-based fluorine-modified water-based polyurethane resin X, the preparation steps of which are as follows:

[0028] a) In a four-port reactor equipped with a thermometer, condenser, and agitator, add 3.0 parts of butanediol, 2.0 parts of trimethylolpropane, and 10.0 parts of polytetrahydrofuran diol in sequence, and heat up to 95-110 ℃ vacuum dehydration for 1.5~2.0h;

[0029] b) Cool down to 60-70°C, add 15.0 parts of isophorone diisocyanate, 2.6 parts of dimethylol propionic acid, then dropwise add 0.05 parts of dibutyltin dilaurate, heat up to 80-82°C and react for 2.0-2.5 hours , add 10.0 parts of acetone to adjust the viscosity, lower the temperature to 70°C, add 3.0 parts of castor oil and keep it warm for 1.0h, then add 2.0 parts of hexafluoroisopropanol dropwise, continue the reaction for 1.0h, and check the NCO value. When the values ​​are consistent, lower the temperature below 40°C;

[0030] c) Slowly add 2.0 parts of triethylamine dropwise, stir and re...

Embodiment 2

[0032] A bio-based fluorine-modified water-based polyurethane resin Y, the preparation process of which is as follows:

[0033] a) In a four-port reactor equipped with a thermometer, a condenser, and an agitator, add 4.0 parts of dipropylene glycol, 1.0 parts of trimethylolpropane, and 8.0 parts of polycarbonate diol in sequence, and heat up to 95 ~110℃ vacuum dehydration for 1.5~2.0h;

[0034] b) Cool down to 60-70°C and add 10.0 parts of hexamethylene diisocyanate, 2.0 parts of dimethylol butyric acid, then dropwise add 0.05 parts of dibutyltin dilaurate, heat up to 80-82°C and react for 2.0-2.5 hours , add 10.0 parts of acetone to adjust the viscosity, lower the temperature to 70°C, add 2.5 parts of castor oil and keep it warm for 0.5 hours, then add 2.5 parts of hexafluoroisopropanol dropwise, continue the reaction for 2 hours, and check the NCO value. When consistent, lower the temperature below 40°C;

[0035] c), slowly dropwise add 1.5 parts of triethylamine, after st...

Embodiment 3

[0037] A bio-based fluorine-modified water-based polyurethane resin Z, the preparation steps of which are as follows:

[0038] a) Add 3.0 parts of butanediol, 1.5 parts of glycerin, and 10.0 parts of polycarbonate diol in sequence to a four-port reactor equipped with a thermometer, condenser, and agitator, and heat up to 95-110°C for vacuum dehydration 1.5~2.0h;

[0039]b) Cool down to 60-70°C and add 11.0 parts of isophorone diisocyanate, 1.5 parts of dimethylol butyric acid, then dropwise add 0.05 parts of dibutyltin dilaurate, heat up to 80-82°C for 2.0-2.5 hours , add 10.0 parts of acetone to adjust the viscosity, lower the temperature to 70°C, add 3.0 parts of castor oil and keep it warm for 1 hour, then add 3.0 parts of hexafluoroisopropanol dropwise, continue the reaction for 1.5 hours, and check the NCO value. When consistent, lower the temperature below 40°C;

[0040] c) Slowly add 1.0 parts of triethylamine dropwise, stir and react for 20 minutes, add 53.95 parts o...

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Abstract

The invention relates to a bio-based bright water-based clear topcoat with a lotus effect. The bio-based bright water-based clear topcoat comprises the following components in parts by weight: 55.0-80.0 parts of bio-based fluorine-modified water-based polyurethane resin, 2.0-5.0 parts of an antifreeze agent, 0.1-0.4 part of a substrate wetting agent, 1.0-6.0 parts of a film forming additive, 0.1-0.5 part of a defoamer, 0.1-0.6 part of a pH adjuster, 0.2-0.6 part of a leveling agent, 0.2-0.8 part of a thickener, and the balance of deionized water. The bio-based bright water-based clear topcoatwith the lotus effect prepared in the invention has excellent adhesion, abrasion resistance, water resistance, corrosion resistance, aging resistance and stain resistance, high gloss, lotus effect, biodegradability and environmental protection, and can be coated on surfaces of woodware, plastic, paper, aluminum and alloy, copper and alloy, and steel structures.

Description

technical field [0001] The invention relates to a self-crosslinking bio-based glossy water-based clear finish paint, which can form a lotus leaf effect on the surface, and belongs to the technical field of water-based functional coatings. Background technique [0002] Coating is a material that can be coated on the surface of an object by different construction techniques to form a solid film with firm adhesion, certain strength, and continuity, so that the surface of the object to be coated is isolated from the environmental medium, thereby protecting the surface of the object Painted objects play the role of protection and decoration. According to the reflectivity of the coating film, the coatings are divided into matt coatings, flat coatings, matt coatings, bright coatings, etc. [0003] Oil-based wood coatings use various organic solvents such as benzene, ketones, esters, ethers, etc. as dispersion media. And during the drying process, it will continue to volatilize in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D175/08C09D5/16C09D5/08C09D7/63C08G18/28C08G18/32C08G18/34C08G18/36C08G18/44C08G18/48C08G18/75C08G18/73
CPCC08G18/0823C08G18/2885C08G18/3206C08G18/3228C08G18/3231C08G18/348C08G18/36C08G18/44C08G18/4854C08G18/73C08G18/755C08G2230/00C09D5/08C09D5/1662C09D5/1687C09D175/04C09D175/08C08K5/053
Inventor 张武许钧强康伦国姚东生
Owner UNION FOSHAN CHEM
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