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Ultraviolet light-cured coating and preparation method thereof

A technology of curing paint and ultraviolet light, which is applied in the field of paint, can solve the problems of yellowing of paint film, reducing the durability of buildings, pulverization, etc., and achieves the effects of good environmental performance, easy industrial production, and simple operation

Inactive Publication Date: 2016-03-16
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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  • Ultraviolet light-cured coating and preparation method thereof

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preparation example Construction

[0023] Such as figure 1 Shown, the preparation method of the ultraviolet curing coating of one embodiment, comprises the steps:

[0024] Step S110 : under a protective gas environment, mix isophorone diisocyanate and polyester diol at 70° C. to 80° C., stir and react for 2 to 3 hours to obtain a first reaction liquid.

[0025] Wherein, the protective gas can be nitrogen or inert gas.

[0026] Step S120: Add 2,2-dimethylolpropionic acid to the first reaction liquid at 70°C-80°C, react for 1-1.5 hours, cool down to 65°C, add hydroxyethyl methacrylate and pentaerythritol triacrylic acid Esters, polymerization inhibitors and catalysts, keep warm for 4-5 hours, then lower the temperature to 45-50°C, add triethylamine to neutralize the reaction to obtain the second reaction solution, adjust the pH value of the second reaction solution to 7-8, A urethane acrylate prepolymer was obtained.

[0027] in,

[0028] The molar weight of described isophorone diisocyanate is equal to descr...

Embodiment 1

[0043] The preparation process of the UV-curable coating of the present embodiment is as follows:

[0044] 1. Under the condition of nitrogen protection, add isophorone diisocyanate into a four-necked round reaction flask with a thermometer, a condenser, and a stirring rod, and place it at 70°C for 10 minutes to preheat the polyester Dihydric alcohol was added dropwise into the four-necked reaction flask, stirred and reacted for 2 hours to obtain the first reaction liquid.

[0045]2. At 70°C, add 2,2-dimethylolpropionic acid to the first reaction liquid, react for 1.5 hours, cool down to 65°C, add hydroxyethyl methacrylate, pentaerythritol triacrylate, and polymerization inhibitor React with the catalyst for 4 hours, then lower the temperature to 50°C, add triethylamine to neutralize the reaction to obtain a second reaction liquid, adjust the pH value of the second reaction liquid to 7, and obtain a polyurethane acrylate prepolymer. Wherein, the molar weight of the isophorone...

Embodiment 2

[0049] The preparation process of the UV-curable coating of the present embodiment is as follows:

[0050] 1. Under the condition of nitrogen protection, add isophorone diisocyanate into a four-necked round reaction flask with a thermometer, a condenser tube and a stirring rod, and place it at 80 ° C for 10 minutes to preheat the polyester Dihydric alcohol was added dropwise into the four-necked reaction flask, stirred and reacted for 2 hours to obtain the first reaction liquid.

[0051] 2. At 80°C, add 2,2-dimethylolpropionic acid to the first reaction liquid, react for 1.5 hours, cool down to 65°C, add hydroxyethyl methacrylate, pentaerythritol triacrylate, polymerization inhibitor and Catalyst, heat preservation reaction for 5 hours, then lower the temperature to 50° C., add triethylamine for neutralization reaction to obtain a second reaction liquid, adjust the pH value of the second reaction liquid to 8, and obtain a polyurethane acrylate prepolymer. Wherein, the molar w...

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Abstract

The invention relates to an ultraviolet light-cured coating and a preparation method thereof. The preparation method for the ultraviolet light-cured coating comprises the following steps: mixing isophorone diisocyanate with polyester dihydric alcohol diol and carrying out a reaction under stirring so as to obtain a first reaction solution; adding 2,2-bis(hydroxymethyl)propionic acid into the first reaction solution at 70 to 80 DEG C, carrying out a reaction for 1 to 1.5 h, then carrying out cooling to 65 DEG C, adding hydroxyl ethyl methacrylate, pentaerythritol triacrylate, a polymerization inhibitor and a catalyst, carrying out a reaction for 4 to 5 h under a heat preservation condition, then carrying out cooling to 45 to 50 DEG C, adding triethylamine, carrying out a neutralization reaction so as to obtain a second reaction solution and adjusting the pH value of the second reaction solution to 7 to 8 so as to obtain polyurethane acrylate prepolymer; and mixing the polyurethane acrylate prepolymer with active multi-functional monomer at 30 to 50 DEG C, adding a photoinitiator, an auxiliary agent and deionized water after cooling and carrying out mixing under stirring so as to obtain the ultraviolet light-cured coating. The ultraviolet light-cured coating prepared by using the method is environment-friendly.

Description

technical field [0001] The invention relates to the field of coatings, in particular to an ultraviolet 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, the paint film q...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C08G18/75C08G18/67C08G18/66C08G18/42C08G18/34
CPCC09D175/14C08G18/672C08G18/673C08G18/755C08G18/0823C08G18/6659C08L83/12C08L33/00C08L71/00
Inventor 刘键姚志刚景梅
Owner CHINA ACADEMY OF ENG PHYSICS FUNCTION MATERIAL RES INST
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