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Polyurethane anticorrosive paint and preparation method thereof

An anti-corrosion coating, polyurethane technology, applied in the direction of polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve the problems of cumbersome preparation process, difficult preparation of polyurethane anti-corrosion coatings, and many raw materials, so as to simplify and improve the preparation process. The preparation is difficult and the production cost is saved

Inactive Publication Date: 2015-02-18
CHENGDU HELE DOORS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One of the purposes of the present invention is to provide a kind of polyurethane anticorrosion coating in view of the above-mentioned deficiencies, in order to solve the disadvantages that existing polyurethane anticorrosion coatings use many raw materials, complex components, and complicated preparation process, resulting in difficulty in the preparation of polyurethane anticorrosion coatings. The problem of high production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The polyurethane anticorrosion coating of the present invention, it is made up of the isocyanate of 80~120 parts, the castor oil of 60~100 parts, the catalyst of 0.1~1 part, the solvent of 100~360 parts and the auxiliary agent of 1.1~5 parts, among the present invention All said parts are parts by mass. The auxiliary agent in the present invention includes a latent curing agent and an accelerator, wherein the latent curing agent is an oxazolidine latent curing agent, and its addition amount is 1 to 4.2 parts; the accelerator is benzoic acid, and its addition amount is 0.1 to 0.8 parts . The polyurethane anticorrosion coating in the present embodiment comprises 60 parts of castor oil, 80 parts of isocyanate, 100 parts of solvent, 0.1 part of catalyst, 1 part of latent curing agent, and 0.1 part of accelerator.

[0028] The isocyanate of the present invention is any one of TDI, MDI, and PAPI, and what the isocyanate in this embodiment uses is TDI. The solvent of the pre...

Embodiment 2

[0032] The implementation mode of this embodiment is the same as that of Example 1, except that the polyurethane anti-corrosion coating in this embodiment adopts the following components by mass: 70 parts of castor oil, 85 parts of TDI, 110 parts of butyl ester, 0.15 part of ethanolamine, latent curing agent namely 1.5 parts of oxazolidine latent curing agent, 0.12 parts of benzoic acid as accelerator.

[0033] The polyurethane anticorrosion coating prepared in this example is a brown liquid, and the surface drying time is 5 to 8 minutes. The film formed after coating has no change after soaking in 10% sodium hydroxide solution or 10% sulfuric acid solution for 48 hours. Test 48h no change.

Embodiment 3

[0035] The implementation mode of this embodiment is the same as that of Example 1, except that the polyurethane anticorrosion coating in this embodiment adopts the following components by mass: 75 parts of castor oil, 85 parts of PAPI, 120 parts of cyclohexanone, 0.13 parts of dimethylethanolamine, The latent curing agent is 1.6 parts of oxazolidine latent curing agent, and the accelerator is 0.13 parts of benzoic acid.

[0036] The polyurethane anticorrosion coating prepared in this example is a brown liquid, and the surface drying time is 5 to 8 minutes. The film formed after coating has no change after soaking in 10% sodium hydroxide solution or 10% sulfuric acid solution for 48 hours. Test 48h no change.

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PUM

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Abstract

The invention discloses a polyurethane anticorrosive paint. The invention is characterized in that the polyurethane anticorrosive paint comprises the following components in parts by mass: 80-120 parts of isocyanate, 60-100 parts of castor oil, 0.1-1 part of catalyst, 100-360 parts of solvent and 1.1-5 parts of assistant. The assistant comprises 1-4.2 parts of latent curing agent and 0.1-0.8 part of accelerator, wherein the latent curing agent is an oxazolidine latent curing agent, and the accelerator is benzoic acid. The polyurethane anticorrosive paint overcomes the defect of complex components in the traditional paint formula, and the preparation method of the polyurethane anticorrosive paint overcomes the defects of great preparation difficulty and complicated technique in the traditional paint, thereby simplifying the preparation technique of the polyurethane anticorrosive paint and saving the production cost for the enterprise; and thus, the method is suitable for popularization and application.

Description

technical field [0001] The invention relates to an anti-corrosion coating, in particular to a polyurethane anti-corrosion coating and a preparation method thereof. Background technique [0002] Corrosion of materials is a serious problem faced by the whole world. In my country, serious economic losses are caused by corrosion of steel every year, so the corrosion protection of materials is particularly important. Polyurethane anti-corrosion coatings are one of the commonly used materials in the surface protection technology of steel parts. Most of the polyurethane anti-corrosion coatings sold on the market have the disadvantages of using many raw materials, complex components, and cumbersome preparation processes, which lead to difficult preparation of polyurethane anti-corrosion coatings and high production costs. . Therefore, it has become an inevitable trend to develop polyurethane anti-corrosion coatings with simple components and processes and low cost. Contents of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D7/12C09D5/08C08G18/67
CPCC09D175/14C08G18/36C09D5/08
Inventor 程政
Owner CHENGDU HELE DOORS