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Waterborne polyurethane coating and preparation method thereof

A water-based polyurethane and coating technology, applied in the field of coatings, can solve problems such as poor adhesion of water-based polyurethane coatings, and achieve the effects of strong weather resistance, improved properties, and improved adhesion

Inactive Publication Date: 2020-12-04
珠海展辰新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of this application is to provide a water-based polyurethane coating and its preparation method, aiming to solve the problem of poor adhesion of water-based polyurethane coatings on a variety of different substrates in the prior art

Method used

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  • Waterborne polyurethane coating and preparation method thereof

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preparation example Construction

[0059] The second aspect of the present application provides a kind of preparation method of waterborne polyurethane coating, and the preparation method of the first component comprises the steps:

[0060] S01. The pigment and deionized water are subjected to a first mixing treatment to obtain a first mixture;

[0061] S02. Grinding the first mixture to obtain a second mixture;

[0062] S03. The second mixture and the aqueous hydroxyacrylic emulsion, the adhesion promoter, the auxiliary agent and the auxiliary solvent are subjected to a second mixing treatment to obtain the first component.

[0063] The preparation method of the first component of the water-based polyurethane coating provided by the second aspect of the present application is simple and convenient, and only needs to mix the components, which is conducive to wide application.

[0064] In the above step S01, the pigment and deionized water are subjected to the first mixing treatment at 800-1200 rpm for 5-10 min...

Embodiment 1

[0071] Waterborne polyurethane coating

[0072] The waterborne polyurethane coating comprises a first component and a second component, wherein the first component comprises the following components in the following parts by weight:

[0073] 40 parts of water-based hydroxyacrylic emulsion,

[0074] 30 parts of paint,

[0075] Adhesion promoter 3 parts,

[0076] 2.5 parts of auxiliary agent,

[0077] 3 parts of cosolvent,

[0078] 21.5 parts of deionized water;

[0079] The second component includes 10 parts of isocyanate curing agent;

[0080] Among them, the S5580 type resin produced by Zhuhai Zhanchen New Material Co., Ltd.

[0081] The pigment is selected from titanium dioxide,

[0082] The adhesion promoter is selected from Changxing ETERKYD 4901-B-72,

[0083] The auxiliary agent is selected from a mixture of 0.5 parts of leveling agent, 0.5 part of thixotropic agent, 0.5 part of defoamer, and 1 part of dispersant, wherein the leveling agent is selected from TEGO...

Embodiment 2

[0094] Waterborne polyurethane coating

[0095] The waterborne polyurethane coating comprises a first component and a second component, wherein the first component comprises the following components in the following parts by weight:

[0096] 45 parts of water-based hydroxyacrylic emulsion,

[0097] 28 parts of pigment,

[0098] Adhesion promoter 3.5 parts,

[0099] 2.5 parts of auxiliary agent,

[0100] 3 parts of cosolvent,

[0101] 19 parts of deionized water;

[0102] The second component includes 11.4 parts of isocyanate curing agent;

[0103] Among them, the S5580 type resin produced by Zhuhai Zhanchen New Material Co., Ltd.

[0104] The pigment is selected from titanium dioxide,

[0105]The adhesion promoter is selected from Changxing ETERKYD 4901-B-72,

[0106] The auxiliary agent is selected from a mixture of 0.5 parts of leveling agent, 0.5 part of thixotropic agent, 0.5 part of defoamer, and 1 part of dispersant, wherein the leveling agent is selected from T...

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Abstract

The invention provides a waterborne polyurethane coating which comprises a first component and a second component, and the first component comprises the following components in parts by weight: 40-60parts of waterborne hydroxyl acrylic emulsion, 20-30 parts of a pigment, 3-5 parts of an adhesion promoter, 3-10 parts of an assistant, 3-5 parts of a cosolvent and 7-25 parts of deionized water, andthe second component comprises an isocyanate curing agent. The waterborne polyurethane coating is a two-component coating, a waterborne hydroxyl acrylic emulsion and an isocyanate curing agent undergoa cross-linking curing reaction to form a coating film, the coating film cooperates with an adhesion promoter, the adhesion of the waterborne polyurethane coating to stainless steel, light metal, plastic and other materials can be effectively improved, and meanwhile, the waterborne polyurethane coating is compounded with pigments, auxiliaries and cosolvents for use. On the basis that the adhesiveforce is improved, the weather resistance is high, the coating can be suitable for a corrosive environment, meanwhile, the VOC content in a coating system is low, the environment-friendly performanceis good, and use is facilitated.

Description

technical field [0001] The application belongs to the technical field of coatings, in particular to a water-based polyurethane coating and a preparation method thereof. Background technique [0002] In daily applications, there are many outdoor equipment such as water pumps, motors, and transformer equipment. The corrosive environment of this industry is changeable, and there are high requirements for the anti-corrosion, weather resistance, and decorative properties of the products. At the same time, since this field involves a variety of different material substrates, such as: carbon steel, stainless steel, copper, aluminum alloy, galvanized sheet, ABS plastic, etc., it is required that coating products should have excellent adhesion to the above substrates. . [0003] Polyurethane coatings are made of hydroxyl acrylic resin as the matrix resin, combined with an isocyanate curing agent, and the crosslinking and curing reaction occurs between the hydroxyl group in the matri...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/61C08G18/62
CPCC08G18/6216C08K2003/2241C08L2201/08C09D175/04C09D7/61C08K3/22
Inventor 马翔宇陈寿生杨秀奇
Owner 珠海展辰新材料股份有限公司