Solvent-free polyurethane coating and preparation method thereof

A solvent-free polyurethane and solvent-free technology, applied in the field of coatings, can solve the problems of high VOC value and poor coating effect, and achieve the effect of zero VOC content, excellent coating ability and high environmental protection performance

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 solvent-free polyurethane coating and its preparation method, aiming to solve the problem that polyurethane coatings in the prior art need to be dissolved by adding a solvent, resulting in high VOC value and poor coating effect

Method used

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  • Solvent-free polyurethane coating and preparation method thereof
  • Solvent-free polyurethane coating and preparation method thereof
  • Solvent-free polyurethane coating and preparation method thereof

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preparation example Construction

[0047] The second aspect of the embodiment of the present application provides a method for preparing a solvent-free polyurethane coating. The method for preparing the first component includes the following steps:

[0048] S01. The solvent-free hydroxyacrylic resin and the reactive diluent are subjected to the first mixing treatment to obtain the first mixture;

[0049] S02. The first mixture and the pigment are subjected to the second mixing treatment, and then the grinding treatment is carried out to the second mixture;

[0050] S03. The second mixture and the auxiliary agent are subjected to a third mixing treatment to obtain the first component.

[0051] The preparation method of the solvent-free polyurethane coating provided by the second aspect of the present application is simple and convenient, and only needs to mix the raw materials of the first component, and then mix it with the second component during use; The preparation method is simple in operation and convenie...

Embodiment 1

[0062] Solvent Free Polyurethane Coatings

[0063] The solvent-free polyurethane coating includes the first component and the second component, and the total weight of the first component is 100%, including the following components in the following weight percentages:

[0064]

[0065] The second component includes an isocyanate curing agent;

[0066] Wherein, the mass ratio of the first component and the second component is 4:1;

[0067] The solvent-free hydroxy acrylic resin is selected from the solvent-free hydroxy acrylic resin S5800 provided by Zhanchen Company,

[0068] The reactive diluent is selected from D-290 produced by Vertellus Performance Materials Company of the United States,

[0069] The pigment is selected from the mixture of 30wt% colored pigment and 13wt% extender pigment by weight percentage, the colored pigment is selected from titanium dioxide, and the extender pigment is selected from barium sulfate precipitation,

[0070] The auxiliary agent is ...

Embodiment 2

[0080] Solvent Free Polyurethane Coatings

[0081] The solvent-free polyurethane coating includes the first component and the second component, and the total weight of the first component is 100%, including the following components in the following weight percentages:

[0082]

[0083] The second component includes an isocyanate curing agent;

[0084] Wherein, the mass ratio of the first component and the second component is 4:1;

[0085] The solvent-free hydroxy acrylic resin is selected from the solvent-free hydroxy acrylic resin S5800 provided by Zhanchen Company,

[0086] The reactive diluent is selected from D-290 produced by Vertellus Performance Materials Company of the United States,

[0087] The pigment is selected from a mixture of 30wt% colored pigments and 18wt% extender pigments by weight, the colored pigment is selected from titanium dioxide, and the extender is selected from barium sulfate precipitation,

[0088] The auxiliary agent is selected from the mix...

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Abstract

The invention provides a solvent-free polyurethane coating, which comprises a first component and a second component, and is prepared from the following components in percentage by weight based on thetotal weight of the first component being 100 percent: 40 to 50 percent of a solvent-free hydroxyl acrylic resin, 5 to 15 percent of an active diluent, 43 to 50 percent of a pigment and 2 to 3 percent of an auxiliary agent, and the second component comprises an isocyanate curing agent. The solvent-free polyurethane coating is a two-component solvent-free polyurethane coating, the solvent-free strong-base acrylic resin and the reactive diluent cooperate with the isocyanate curing agent to achieve the film forming effect, the film forming speed is increased, the coating effect of the coating isimproved, the zero VOC content is achieved, and the specified film forming thickness can be achieved through one-time coating in a severe corrosion environment; the performance is excellent.

Description

technical field [0001] The application belongs to the technical field of coatings, and in particular relates to a solvent-free polyurethane coating and a preparation method thereof. Background technique [0002] 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 matrix resin and the isocyanate group in the curing agent. The cured product has the characteristics of high gloss and high fullness, and the paint film has the advantages of strong adhesion, high hardness and wear resistance. Therefore, it is widely used in various industrial fields and is the most widely used high-grade weather-resistant topcoat. [0003] However, due to the high molecular weight of the hydroxyacrylic resin itself, the viscosity is high, so it needs to be diluted with a solvent to reduce the viscosity of the resin in order to prepare coating product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/61
CPCC08K2003/2241C08K2003/3045C09D175/04C09D7/61C08K3/22C08K3/30
Inventor 马翔宇陈寿生杨秀奇
Owner 珠海展辰新材料股份有限公司
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