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Polyurethane self-crosslinking water-based ultraviolet curing coating

A curing coating and self-crosslinking technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of low sealing effect, insufficient paint film density, poor scratch resistance, etc., and achieve excellent environmental performance, flow Excellent flatness and adhesion, and the effect of protecting the substrate

Inactive Publication Date: 2020-08-14
QINGDAO ZHANCHEN NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it cannot be ignored that in order to reduce the viscosity of UV coatings, it is necessary to add a part of active monomers to dilute the viscosity, and the active monomers have certain volatility, and at the same time have certain harm to the human body, especially acrylate monomers. The skin, eyes and mucous membranes have a strong stimulating effect, so how to overcome the above defects and reduce the side effects of UV coatings has important research significance
The water-based paint is a new type of paint that uses water as a diluent and the resin forms a film under the action of a curing agent. It has the advantages of environmental protection, low or no VOC emissions, etc., but it has insufficient film density, low sealing effect, Disadvantages such as poor scratch resistance

Method used

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  • Polyurethane self-crosslinking water-based ultraviolet curing coating
  • Polyurethane self-crosslinking water-based ultraviolet curing coating
  • Polyurethane self-crosslinking water-based ultraviolet curing coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A polyurethane self-crosslinking water-based UV-curable coating, according to mass percentage, its components consist of:

[0035] Hydroxy-modified acrylate emulsion 45%, reactive isocyanate prepolymer 25%, foam breaking polymer 0.3%, polyacrylate leveling agent 0.3%, high molecular weight block polymer dispersant 0.5%, chloromethyl isothiazole Kelinone 0.2%, 2-amino-2-methyl-1-propanol 0.1%, polyurethane-based thickener 0.6%, deionized water 28%;

[0036] The coating prepared by this formula is sprayed on the surface of Fraxinus mandshurica wood according to the mechanical spraying method, and is quickly cured by ultraviolet light, which can greatly improve the production efficiency. The performance test results are shown in Table 1 below:

[0037] The performance detection result of table 1 embodiment 1-5

[0038]

[0039]

[0040] The performance test results in Table 1 show that after mechanical coating, the formula has excellent comprehensive properties such...

Embodiment 2

[0042] A polyurethane self-crosslinking water-based UV-curable coating, according to mass percentage, its components consist of:

[0043] Amino-modified acrylate resin emulsion 60%, reactive isocyanate prepolymer 15%, polysiloxane solution 0.3%, polysiloxane leveling agent 0.2%, high molecular weight block polymer dispersant 0.4%, methyl 0.2% isothiazolinone, 0.1% 2-amino-2-methyl-1-propanol, 0.5% acrylate thickener, 23.3% deionized water;

[0044] The coating prepared by this formula is sprayed on the surface of Fraxinus mandshurica wood according to the electrostatic spraying method, and is quickly cured by ultraviolet light, which can greatly improve the production efficiency. The performance test results are shown in Table 1 above. The performance test results in Table 1 show that the formulation has excellent defoaming and adhesion after electrostatic coating and UV curing, which can effectively protect the substrate and improve the decorative aesthetics.

Embodiment 3

[0046] A polyurethane self-crosslinking water-based UV-curable coating, according to mass percentage, its components consist of:

[0047] Hydroxy-modified acrylate emulsion 40%, reactive isocyanate prepolymer 20%, foam breaking polymer 0.2%, polyacrylate leveling agent 0.2%, high molecular weight block polymer dispersant 1.0%, bromonitropropylene glycol 0.1 %, 2-amino-2-methyl-1-propanol 0.1%, cellulose thickener 0.5%, deionized water 37.9%;

[0048]The coating prepared by this formula is sprayed on the surface of Fraxinus mandshurica wood according to the mechanical spraying method, and is quickly cured by ultraviolet light, which can greatly improve the production efficiency. The performance test results are shown in Table 1 above. The performance test results in Table 1 show that the formulation has better overall performance after mechanical coating and UV curing, which can effectively protect the substrate and improve the decorative aesthetics.

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Abstract

The invention belongs to the technical field of coating chemical industry, in particular to a polyurethane self-crosslinking water-based ultraviolet curing coating. The composition is composed of thefollowing components according to mass percent: 30-70% of water-based acrylate resin emulsion; 10-30% of an active isocyanate prepolymer, 0.1-0.5% of an antifoaming agent, 0.1-1.5% of a leveling agent, 0.1-1.0% of a dispersant, 0.1-0.5% of a bactericide, 0.1-0.5% of a pH conditioning agent, 0.3-1.5% of a thickener and 10-60% of deionized water. The polyurethane self-crosslinking water-based ultraviolet curing coating is suitable for coating modification of various woodware furniture, after coating, the leveling property and the adhesive force are excellent, the base material can be effectivelyprotected, and the prepared woodware paint film has excellent protection and decoration effects, and is environmentally friendly, free of VOC emission and excellent in environmental protection performance.

Description

technical field [0001] The invention belongs to the technical field of paint chemical industry, and in particular relates to a polyurethane self-crosslinking water-based ultraviolet light curing paint. Background technique [0002] The progress of science not only brings convenience to people, but also causes huge pollution to the human environment. The pursuit of a green, comfortable, healthy and safe home environment is the common pursuit of all people. With the country's vigorous promotion of environmental protection and the official publication and mandatory implementation of relevant laws and regulations, the coatings industry is adapting to the development and doing systematic research on the research and development, preparation and commercial application of new environmentally friendly coatings. [0003] UV photocurable coatings are a large category of many coatings. Under the action of photoinitiators, active free radicals can be excited after ultraviolet radiation ...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D7/63C09D7/65C08G18/32C08G18/62C08G18/67
CPCC08G18/3206C08G18/6225C08G18/675C08L2205/025C08L2205/035C09D175/14C09D7/63C09D7/65C08L33/04C08L53/00C08L75/04C08K5/47C08K5/17C08L83/04C08L1/02C08K5/32
Inventor 蔡龙刘华东钟荆祥田军
Owner QINGDAO ZHANCHEN NEW MATERIAL