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Solvent-free anticorrosive coating based on polyurea elastomer and preparation method of solvent-free anticorrosive coating

A technology for polyurea elastomers and anti-corrosion coatings, applied in anti-corrosion coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of reduced elasticity and easy wear, and achieve reduced usage, reduced environmental pollution, and good organic resistance Effect of Solvent Corrosion Properties

Inactive Publication Date: 2017-07-07
GUANGDONG ZHONGXING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the end of the invention is -SH polysulfide rubber, which can only react with one molecule of isocyanate to form a single straight-chain polymer structure. Compared with ordinary polyurea coatings, the elasticity decreases and is easy to wear

Method used

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  • Solvent-free anticorrosive coating based on polyurea elastomer and preparation method of solvent-free anticorrosive coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The polyurea anticorrosion coating of this embodiment is formulated from the raw materials of the following parts by weight (kg): the coating is made up of components A and B, and the component A is made up of the following parts by weight: p-phenylene diisocyanate 70 parts, 10 parts of butyl acetate, and the B component is made up of the following materials by weight: 70 parts of polyamide polyamine epoxy fluoropropane, 25 parts of diethyltoluenediamine, 25 parts of liquid polysulfide rubber, talc 30 parts of powder, 2 parts of γ-glycidyl propyl-trimethoxysilane, 5 parts of 2-(2'-hydroxy-5'-methylphenyl)benzotriazole.

[0026] The preparation scheme of the present embodiment polyurea anticorrosion coating is as follows:

[0027] The preparation method of the A component: Add butyl acetate into a reaction kettle protected by nitrogen, heat to 100°C under stirring, vacuumize at a constant temperature to -0.1MPa, dehydrate for 3 hours, and cool down to 50°C under atmosphe...

Embodiment 2

[0032] The polyurea anticorrosion coating of this embodiment is formulated from the raw materials of the following parts by weight (kg): the coating is made up of components A and B, and the component A is made up of the following parts by weight: tetramethylbenzene 100 parts of dimethyl diisocyanate, 20 parts of ethyl carbonate, and the B component is made up of the following materials by weight: 70 parts of polyamide polyamine epichlorohydrin, 20 parts of isophorone diamine, liquid polysulfide 15 parts of rubber, 40 parts of carbon black, 5 parts of vinyltrichlorosilane, 0.5 part of 2-(2'-hydroxy-3',5'-di-tert-phenyl)-5-chlorinated benzotriazole.

[0033] The preparation scheme of the present embodiment polyurea anticorrosion coating is as follows:

[0034] The preparation method of the A component: add ethyl carbonate into a reaction kettle protected by nitrogen, heat to 90°C under stirring, vacuumize at a constant temperature to -0.09MPa, dehydrate for 3 hours, and cool do...

Embodiment 3

[0039]The polyurea anticorrosion coating in this embodiment is prepared from the following raw materials in parts by weight (kg): a solvent-free anticorrosion coating based on polyurea elastomer, the coating is composed of A component and B component, and the A component Parts are made up of the following parts by weight: 70 parts of diphenylmethane diisocyanate, 5 parts of dibutyl phthalate, and the B component is made up of the following parts by weight: polyamide polyamine epibromohydrin 50 parts Parts, 30 parts of 4,4-bis-sec-butylaminodiphenylmethane, 30 parts of liquid polysulfide rubber, 20 parts of titanium dioxide, 5 parts of γ-aminopropyl-trimethoxysilane, 2-(2'-hydroxyl-5 10 parts of '-methylphenyl) benzotriazole.

[0040] The preparation scheme of the present embodiment polyurea anticorrosion coating is as follows:

[0041] The preparation method of the A component: add dibutyl phthalate into a reaction kettle protected by nitrogen, heat to 120°C under stirring, v...

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Abstract

The invention discloses a solvent-free anticorrosive coating based on a polyurea elastomer. The coating contains a component A and a component B, wherein the component A contains the following substances in parts by weight: 70-100 parts of aromatic diisocyanate and 5-20 parts of a viscosity reducer; and the component B contains the following components in parts by weight: 50-70 parts of halogenated amino-terminated resin, 20-30 parts of an amino-terminated chain extender, 15-30 parts of liquid-state polysulfide rubber, 20-40 parts of pigments, 0.5-5 parts of a coupling agent and 0.5-10 parts of a hydroxyl ultraviolet absorber. By utilizing the halogenated amino-terminated resin and a small amount of liquid-state polysulfide rubber, the solvent-free anticorrosive coating disclosed by the invention has both good corrosion resistance and relatively good elasticity and wear resistance.

Description

technical field [0001] The invention relates to an anticorrosion coating, in particular to a solvent-free anticorrosion coating based on polyurea elastomer. Background technique [0002] Due to its excellent performance, metal is widely used in pipeline transportation fields such as petroleum, chemical industry, pipeline, and marine engineering. However, most metal pipelines are corroded due to the transportation of corrosive media, which is easy to cause serious leakage. Therefore, various types of pipelines are often used. The anti-corrosion material is made into a covering layer or a lining to completely isolate the metal pipe from the corrosive medium, prevent corrosion and abrasion of the equipment, improve the corrosion resistance, wear resistance, safety and prolong the service life of the equipment. [0003] Since polyurea coating has the characteristics of excellent anti-corrosion performance, fast construction performance, no pollution to the environment, and the c...

Claims

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Application Information

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IPC IPC(8): C08G18/60C08G18/64C08G18/65C09D5/08C09D175/02C09D7/12
CPCC08G18/4054C08G18/4081C08G18/603C08G18/6453C08G18/6529C08G18/6547C08K3/04C08K3/22C08K3/34C08K5/3475C08K5/5425C08K5/5435C08K5/544C08K2003/2241C09D5/08C09D7/61C09D7/63C09D175/02
Inventor 张全章冉云奇陶宏杰
Owner GUANGDONG ZHONGXING TECH
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