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Humidity and ultraviolet dual-cured polyurethane woodware coating and preparation method thereof

A wood coating, double curing technology, applied in the direction of coating, etc., can solve the problems of incomplete curing of colored UV paint, incomplete curing of matte UV paint, good impact and wear resistance, etc., to achieve mature and stable production technology, fine The effect of low density and excellent defoaming performance

Inactive Publication Date: 2014-07-02
广州常圣新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to overcome the shortcoming of existing ultraviolet light curing wood coating technology that the existing ultraviolet light curing wood coating is not fully cured on the irregular coating surface, the inside of the colored UV paint, and the inside of the matte UV paint is not completely cured. Provide a dual curing method to prepare double UV curing wood coatings with moisture curing and UV curing. The coating has fast curing speed, good storage stability, small fineness, good leveling, and water resistance of the paint film Good, good solvent resistance, high hardness, good impact and wear resistance, high gloss

Method used

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  • Humidity and ultraviolet dual-cured polyurethane woodware coating and preparation method thereof
  • Humidity and ultraviolet dual-cured polyurethane woodware coating and preparation method thereof
  • Humidity and ultraviolet dual-cured polyurethane woodware coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Prepare moisture-ultraviolet dual-curing polyurethane wood coatings according to the following steps.

[0047] Prepare raw materials: Prepare materials according to the formula in Table 1.

[0048] Table 1

[0049]

[0050]

[0051] Synthesis of polyurethane primary polymer I: first add polyether N210 into the reaction vessel, heat up to 80°C, then add isophorone diisocyanate and catalyst dibutyltin dilaurate (0.15kg), and stir for 2 hours. Obtain reaction initial polymer I;

[0052] Synthesis of Polyurethane Prepolymer II: Add a metered mixture of 1,4-butanediol, trimethylolpropane, glycerol and acetone (1.8kg) dropwise to the obtained initial polymer I, and control the dropping time at 1 hour; the dropwise addition is completed, and at a temperature of 80°C, react for 1 hour, and the reaction is completed to obtain polyurethane prepolymer II;

[0053] Synthesis of polyurethane prepolymer III: Add epoxy resin E-44 and the remaining acetone (1.8kg) into the rea...

Embodiment 2

[0058] Prepare moisture-ultraviolet dual-curing polyurethane wood coatings according to the following steps.

[0059] Prepare raw materials: Prepare materials according to the formula in Table 2.

[0060] Table 2

[0061]

[0062] Synthesis of polyurethane primary polymer I: First, add polyether N210 into the reaction vessel, heat up to 80°C, then add hexamethylene diisocyanate, isophorone diisocyanate and catalyst dibutyltin dilaurate, and stir to react In 2 hours, the reaction initial polymer I was obtained;

[0063] Synthesis of polyurethane prepolymer II: dropwise add a mixture of 1,4-butanediol, trimethylolpropane and acetone (1.8kg) to the obtained primary polymer I, and control the dropping time to 1 hour After the dropwise addition is completed, react for 1 hour at a temperature of 80° C., and the polyurethane prepolymer II is obtained after the reaction is completed;

[0064] Synthesis of polyurethane prepolymer III: Add epoxy resin E-44 and the remaining aceton...

Embodiment 3

[0069] Prepare moisture-ultraviolet dual-curing polyurethane wood coatings according to the following steps.

[0070] Prepare raw materials: prepare materials according to the formula in Table 3.

[0071] table 3

[0072]

[0073]

[0074] Synthesis of polyurethane primary polymer I: First, add polyether N210 into the reaction vessel, heat up to 85°C, then add hexamethylene diisocyanate and catalyst dibutyltin dilaurate (0.15kg), and stir for 2 hours. Obtain reaction initial polymer I;

[0075] Synthesis of Polyurethane Prepolymer II: Add a metered mixture of 1,4-butanediol, trimethylolpropane, glycerol and acetone (1.8kg) dropwise to the obtained initial polymer I, and control the dropping time at 1 hour; the dropwise addition is completed, and at a temperature of 80°C, react for 1 hour, and the reaction is completed to obtain polyurethane prepolymer II;

[0076]Synthesis of polyurethane prepolymer III: Add epoxy resin E-44 and the remaining acetone (1.8kg) into the ...

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Abstract

The invention discloses humidity and ultraviolet dual-cured polyurethane woodware coating and a preparation method thereof. A synthesis method includes synthesizing initial polyurethane polymer I, polyurethane pre-polymer II, polyurethane pre-polymer III, polyurethane acrylate oligomer and ultraviolet cured woodware coating. The humidity and ultraviolet dual-cured polyurethane woodware coating is mainly prepared by aliphatic diisocyanate, dihydric alcohol pre-polymer, polyhydroxy acid, epoxy resin and hydroxy acrylic ester and the like, and by adding auxiliaries such as photoinitiators, flatting agents, defoamers, substrate wetting agents and catalysts, the ultraviolet cured woodware coating is prepared. The ultraviolet cured woodware coating can form films and be cured under irradiation of ultraviolet, also can be cured by humidity in the air within 5 hours at the room temperature, and has the advantages of high solid, NCO (isocyanate) group content and adhesion force, fine resistance to chemical corrosion, high film coating hardness and fine storage stability and the like, can be used for irregular coating surfaces, hone finished UV (ultraviolet) paint and UV colored paint and the like where cannot be irradiated by the ultraviolet.

Description

technical field [0001] The invention relates to a new type of paint: a UV curable paint with dual curing of moisture and ultraviolet light, in particular to a green and environment-friendly polyurethane-acrylate type UV curable wood paint with high solid content and a preparation method thereof. Background technique [0002] From daily necessities to cutting-edge defense products, from traditional industries to high-tech sectors, coating products are required to protect, decorate or impart special functions. With the progress of society and the improvement of human awareness, people have gradually realized the threat of volatile organic compounds and heavy metals in solvent-based coatings to the destruction of the earth's ecological environment and the further development of human beings. Driven by energy conservation and emission reduction, UV-curable coatings have received more and more attention in recent years, and the technology has become more and more advanced. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D4/02C08G18/67
Inventor 叶代勇
Owner 广州常圣新材料科技有限公司
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