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Water-based ultraviolet curing coating and preparation method thereof

A technology for curing coatings and ultraviolet light, applied in the field of coatings, can solve the problems of reducing the durability of buildings, yellowing of paint films, exposed corrosion of building surfaces, etc., and achieves the effect of easy industrial production and simple operation.

Active Publication Date: 2016-05-25
CHINA ACADEMY OF ENG PHYSICS FUNCTION MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the existing water-based UV-curable coatings being exposed to outdoor sunlight, the paint film quickly turns yellow and pulverizes; if water-based UV-curable coatings are used on buildings, it will also cause exposed corrosion on the building surface, thereby reducing the quality of the building. durability

Method used

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  • Water-based ultraviolet curing coating and preparation method thereof
  • Water-based ultraviolet curing coating and preparation method thereof
  • Water-based ultraviolet curing coating and preparation method thereof

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preparation example Construction

[0028] Such as figure 1 Shown, the preparation method of the waterborne ultraviolet light curing coating of one embodiment, comprises the steps:

[0029] Step S110: Under the environment of protective gas, diisocyanate and diol are mixed according to the molar ratio of 1:0.2-0.6, and stirred and reacted at 70-90° C. for 1-3 hours to obtain a first reaction liquid.

[0030] Wherein, the protective gas can be nitrogen or inert gas.

[0031] Wherein, the diisocyanate is selected from at least one of xylene diisocyanate, dicyclohexylmethane diisocyanate, diphenylmethane diisocyanate, terexylylene diisocyanate, hexamethylene diisocyanate and isophorone diisocyanate.

[0032] Wherein, the diol is selected from at least one of polyether diol, polycaprolactone diol and polycarbonate diol. And the molecular weight of dihydric alcohol is 500g / mol, 600g / mol or 1000g / mol.

[0033] Step S120: adding dihydroxycarboxylic acid and a catalyst to the first reaction liquid, stirring and react...

Embodiment 1

[0063] The preparation process of the water-based UV-curable coating of the present embodiment is as follows:

[0064] (1) Preparation of chain extender: Pentaerythritol triacrylate and methoxyphenol (MEHQ) are transferred to a three-necked flask equipped with a thermometer, condenser tube and stirrer with 10 g of acetone, wherein the mass of methoxyphenol The mass ratio to pentaerythritol triacrylate is 0.5:100; then it is placed in a constant temperature water bath at 45°C, and isophorone diisocyanate is added dropwise into a three-necked flask using a constant pressure funnel, and dibutyltin dilaurate is added at the same time (DBTAL) for catalysis, and then rise to 55 ° C for 2 hours, until the content of isocyanate ions in the system is 8%. Drop trimethylolpropane into the reaction system at a constant pressure, add an appropriate amount of acetone, raise the temperature to 65°C for 3 hours, wait for the isocyanate ions in the reaction system to disappear, and discharge t...

Embodiment 2

[0079] The preparation process of the water-based UV-curable coating of the present embodiment is as follows:

[0080] (1) Preparation of chain extender: Pentaerythritol triacrylate and methoxyphenol (MEHQ) are transferred to a three-necked flask equipped with a thermometer, condenser tube and stirrer with 10 g of acetone, wherein the mass of methoxyphenol The mass ratio to pentaerythritol triacrylate is 0.5:100; then it is placed in a constant temperature water bath at 45°C, and isophorone diisocyanate is added dropwise into a three-necked flask using a constant pressure funnel, and dibutyltin dilaurate is added at the same time (DBTAL) for catalysis, then rise to 55°C and react for 2 hours until the content of isocyanate ions in the system is 8%, drop trimethylolpropane into the reaction system at constant pressure, add acetone in an appropriate amount, and heat up to 65°C After reacting for 3 hours, the isocyanate ion in the reaction system isocyanate ion disappears, and th...

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Abstract

The invention relates to a water-based ultraviolet curing coating and a preparation method thereof. The preparation method for the water-based ultraviolet curing coating comprises the following steps: mixing diisocyanate and diol and reacting to obtain a first reaction solution; adding dyhydroxyl carboxylate and a catalyst to the first reaction solution and reacting to obtain a second reaction solution, and mixing the second reaction solution and a chain extender and reacting to obtain a third reaction solution; adding an alkene end-capping agent and a polymerization inhibitor to the third mixed solution and reacting to obtain a fourth reaction solution, and adding triethylamine to the fourth reaction solution and reacting to obtain a urethane acrylate prepolymer; adding deionized water to the urethane acrylate prepolymer, carrying out emulsion dispersion to obtain an urethane acrylate dispersoid, mixing the urethane acrylate dispersoid, a photoinitiator, a defoaming agent and a leveling agent, and carrying out stirring dispersion for 15 to 30 minutes to obtain the water-based ultraviolet curing coating. The water-based ultraviolet curing coating prepared by the preparation method disclosed by the invention has relatively higher performances.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a water-based ultraviolet light curing coating and a preparation method thereof. Background technique [0002] Water-based coatings have the advantages of non-toxic, non-polluting, non-irritating, excellent coating performance, energy saving, production safety, etc., responding to the theme of the era of high efficiency, energy saving, green and environmental protection in the 21st century. At present, most water-based coatings use linear polymers as the main material. Linear polymers have many excellent properties, but have the disadvantage of slow curing speed. [0003] Combining water-based coatings and light-curing coating technologies can effectively utilize the advantages of fast curing speed of light-curing technology to obtain water-based UV-curable coatings with convenient construction and better performance. [0004] However, due to the existing water-based UV-curable coatings,...

Claims

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Application Information

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IPC IPC(8): C09D175/14C08G18/67C08G18/66C08G18/34
CPCC08G18/348C08G18/672C08G18/673C09D175/14C08G18/6659C08G18/6692C08G18/0823
Inventor 刘键姚志刚景梅
Owner CHINA ACADEMY OF ENG PHYSICS FUNCTION MATERIAL RES INST
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