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Light-cured urethane acrylate aqueous dispersion and preparation method thereof

A polyurethane acrylate and acrylate technology, applied in the field of coatings, can solve the problems of unsustainable antifouling performance, elastic hand feel of water-based light-curable resin and anti-fouling and anti-graffiti properties can not be obtained at the same time, and the paint film is easy to produce adhesion and other problems. Fingerprint performance is maintained for a long time, the effect of improving stain resistance and graffiti resistance, and high hardness

Inactive Publication Date: 2019-12-24
广东昊辉新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a photocurable urethane acrylate aqueous dispersion and a preparation method thereof, aiming at solving the problem that the existing water-based photocurable resin has elastic feel and stain resistance and graffiti resistance. And the stain resistance is not durable, and the paint film is prone to adhesion problems

Method used

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  • Light-cured urethane acrylate aqueous dispersion and preparation method thereof
  • Light-cured urethane acrylate aqueous dispersion and preparation method thereof

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preparation example Construction

[0030] see figure 1 , figure 1 It is a flowchart of a preferred embodiment of a method for preparing a light-cured polyurethane acrylate aqueous dispersion of the present invention, wherein, as shown in the figure, it includes the following steps:

[0031] S100, under the condition of 60-120°C, reacting double-end epoxy silicone oil and single-end carboxyl silicone oil to obtain a modified silicone intermediate A containing hydroxyl;

[0032] S200, under the condition of 60-130°C, reacting caprolactone monomer and hydroxyl-containing acrylate to obtain hydroxyl-containing modified acrylate monomer B;

[0033] S300, under the condition of 60-95°C, mix diisocyanate, dimethylolpropionic acid, and hydroxyl-containing modified silicone intermediate A, and react under the action of a catalyst to obtain a polyurethane prepolymer grafted with silicone;

[0034] S400, under the condition of 70-90°C, add a polymerization inhibitor, an antioxidant, and a modified acrylate monomer B con...

Embodiment 1

[0060] 1), Synthesis of modified organosilicon intermediate A containing hydroxyl

[0061] Add 130g of double-end epoxy silicone oil X-22-163 (Shin-Etsu) and 280g of single-end carboxyl silicone oil X-22-3701E (Shin-Etsu) into a dry four-necked flask equipped with a stirrer, a thermometer, and a condenser, and add 1.25g of catalyst triphenylphosphine, the reaction is carried out in an electric heating mantle with temperature control, the temperature is raised to 105°C, and the reaction is maintained at this temperature for about 4 hours to obtain the modified organosilicon intermediate A containing hydroxyl groups.

[0062] 2), the synthesis of modified acrylate monomer B containing hydroxyl

[0063] Add 114g caprolactone monomer and 298g ditrimethylolpropane triacrylate in the dry four-necked flask that stirrer, thermometer, condenser are equipped with, add dropwise 1.25g catalyst dibutyltin dilaurate, react in with Carried out in a temperature-controlled electric heating ma...

Embodiment 2

[0073] 1), Synthesis of modified organosilicon intermediate A containing hydroxyl

[0074] Add 135g of double-end epoxy silicone oil KF-105 (Shin-Etsu) and 267g of single-end carboxyl silicone oil X-22-3701E (Shin-Etsu) into a dry four-necked flask equipped with a stirrer, thermometer, and condenser, and add 1.25g The catalyst is triphenylphosphine, and the reaction is carried out in an electric heating mantle with temperature control. The temperature is raised to 105° C., and the reaction is maintained at this temperature for about 4 hours to obtain a hydroxyl-containing organosilicon intermediate A.

[0075] 2), the synthesis of modified acrylate monomer B containing hydroxyl

[0076] Add 114g caprolactone monomer and 297g pentaerythritol triacrylate (PETA) in the dry four-necked flask that agitator, thermometer, condenser are equipped with, add dropwise 1.25g catalyst dibutyltin dilaurate, react in with temperature control It was carried out in an electric heating mantle, ...

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Abstract

The invention discloses a photo-cured urethane acrylate aqueous dispersion and a preparation method thereof, the method comprises the following steps: reacting double-terminal epoxy organic silicone oil with single-terminal carboxyl organic silicone oil to obtain a hydroxyl-containing modified organic silicon intermediate A; reacting a caprolactone monomer with hydroxyl-containing acrylate to obtain a hydroxyl-containing modified acrylate monomer B; mixing diisocyanate, dimethylolpropionic acid and the hydroxyl-containing modified organic silicon intermediate A, and performing a reaction to obtain an organic silicon grafted polyurethane prepolymer; adding a polymerization inhibitor, an antioxidant and a hydroxyl-containing modified acrylate monomer B into the organosilicone grafted polyurethane prepolymer, and performing a reaction to obtain terminated urethane acrylate; and adding organic amine and deionized water into the terminated urethane acrylate, and performing a reaction to obtain the photo-cured urethane acrylate aqueous dispersion. After a paint film is formed by the product, the product is strong and durable in stain resistance and graffiti resistance, and has good elastic hand feeling and adhesion resistance.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a photocurable polyurethane acrylate aqueous dispersion and a preparation method thereof. Background technique [0002] UV-curable resins are attracting more and more attention because of their fast curing, environmental protection and high performance. The UV-curable water-based resin combines the advantages of both water-based resin and photo-curable resin, and solves the contradiction between the hardness and flexibility of the solvent-based photo-curable resin coating film, and has a better application prospect. [0003] Most of the currently reported light-curable elastic hand-feel stain-resistant resins are solvent-based, and there are few reports on water-based light-curable elastic hand-feel stain-resistant resins. Moreover, such resins have stain resistance but no elastic hand feel, and the two cannot be balanced. And its anti-fouling and anti-graffiti performance is achieved by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/67C08G18/65C08G18/32C08G18/61C09D175/14C09D5/16C09D7/20
CPCC08G18/3228C08G18/6529C08G18/672C09D5/1662C09D175/14C09D7/20C08G18/61
Inventor 谢国仁郭常州
Owner 广东昊辉新材料有限公司
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