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Ultraviolet curing coating and preparation method thereof

A technology of curing paint and ultraviolet light, applied in the field of paint, can solve the problems of yellowing of paint film, reducing the durability of buildings, chalking, etc., to achieve the effect of simple operation and easy industrial production

Active Publication Date: 2016-05-04
CHINA ACADEMY OF ENG PHYSICS FUNCTION MATERIAL RES INST
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  • 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 curing coating and preparation method thereof
  • Ultraviolet curing coating and preparation method thereof
  • Ultraviolet curing coating and preparation method thereof

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preparation example Construction

[0029] Such as figure 1 Shown, the preparation method of the ultraviolet curing coating of one embodiment, comprises the steps:

[0030] Step S110: Under the environment of protective gas, mix the diisocyanate and the modifying agent, and react at 60-85° C. for 1-3 hours to obtain the modified diisocyanate.

[0031] Wherein, the molar ratio of modifier to diisocyanate is 1:2.

[0032] Wherein, the protective gas can be nitrogen or inert gas.

[0033] Wherein, the diisocyanate is selected from at least one of dicyclohexylmethane diisocyanate, diphenylmethane diisocyanate, terexylylene diisocyanate, hexamethylene diisocyanate and isophorone diisocyanate.

[0034] Wherein, the modifying agent is at least one selected from bisphenol A, 1,3-adamantanediol, 1,3-bis(4-hydroxyphenyl)adamantane and 1,4-cyclohexyldimethanol.

[0035] Step S120: adding dihydric alcohol to the modified diisocyanate, stirring and reacting at 60-80° C. for 2-4 hours to obtain a first reaction liquid.

...

Embodiment 1

[0066] The preparation process of the UV-curable coating of the present embodiment is as follows:

[0067] 1. Under the condition of nitrogen protection, add diisocyanate into a four-necked round reaction bottle with a thermometer, a condenser tube and a stirring rod, place it in a constant temperature water bath at 60°C, and use a constant pressure funnel to dissolve the modifier Add it dropwise into a four-necked reaction bottle, and keep it warm for 3 hours to obtain a modified diisocyanate. Wherein, the molar ratio of modifier to diisocyanate is 1:2. The diisocyanate is selected from dicyclohexylmethane diisocyanate. The modifier is selected from bisphenol A.

[0068] 2. Add dihydric alcohol to the modified diisocyanate, stir and react at 60° C. for 4 hours to obtain the first reaction solution. Wherein, the molar ratio of dihydric alcohol to modified diisocyanate is 1:2. The diols are selected from polyether diols.

[0069] 3. Add polyhydroxycarboxylic acid and catal...

Embodiment 2

[0079] 1. Under the condition of nitrogen protection, add diisocyanate into a four-necked round reaction bottle with a thermometer, a condenser tube and a stirring rod, place it in a constant temperature water bath at 85°C, and use a constant pressure funnel to dissolve the modifier Add it dropwise into a four-necked reaction bottle, and keep it warm for 3 hours to obtain a modified diisocyanate. Wherein, the molar ratio of modifier to diisocyanate is 1:2. The diisocyanate is selected from diphenylmethane diisocyanate. The modifier is selected from 1,3-adamantanediol.

[0080] 2. Add dihydric alcohol to the modified diisocyanate, stir and react at 60° C. for 4 hours to obtain the first reaction liquid. Wherein, the molar ratio of dihydric alcohol to modified diisocyanate is 1:6. The diols are selected from polyether diols.

[0081] 3. Add polyhydroxycarboxylic acid and catalyst to the first reaction liquid, stir and react at 70° C. for 2 hours to obtain the second reaction...

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Abstract

The invention relates to an ultraviolet curing coating and a preparation method thereof. The preparation method of the ultraviolet curing coating comprises the following steps: facilitating the reaction of diisocyanate and a modifier to obtain modified diisocyanate; facilitating the reaction of modified diisocyanate and dihydric alcohol to obtain a first reaction solution; adding polyhydroxy carboxylic acid and a catalyst into the first reaction solution to obtain a second reaction solution, and adding 2-ethyl-1,3-hexanediol into the second reaction solution to obtain a third reaction solution; adding hydroxied acrylates and a polymerization inhibitor into the third reaction solution to obtain a fourth reaction solution, and adding triethylamine into the fourth reaction solution to obtain a polyurethane acrylate prepolymer; and adding the deionized water into the polyurethane acrylate prepolymer to prepare polyurethane acrylate dispersoid, mixing the polyurethane acrylate dispersoid, fillers, a photoinitiator, a flatting agent, a defoaming agent and a dispersing agent, stirring and dispersing to obtain the ultraviolet curing coating. The ultraviolet curing coating prepared by the method has good properties.

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): C09D175/14C09D7/12C08G18/80C08G18/67C08G18/66C08G18/48C08G18/42C08G18/44C08G18/34C08G18/32
CPCC08G18/3206C08G18/348C08G18/44C08G18/4825C08G18/672C08G18/673C08G18/8016C08G18/8019C08K3/22C08K3/34C08K3/36C08K2003/2227C08K2003/2241C09D7/61C09D175/14C08G18/0823
Inventor 刘键姚志刚景梅
Owner CHINA ACADEMY OF ENG PHYSICS FUNCTION MATERIAL RES INST
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