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Anticorrosive polyurea coating for petrochemical industry and preparation method thereof

An industry, polyurea technology, applied in the petrochemical industry anti-corrosion polyurea coating and its preparation field, can solve the problems of low tensile strength and elongation of liquid polysulfide rubber, reduced polyurea tensile strength, poor aging resistance and other problems , to achieve the effects of enhancing interfacial compatibility, increasing crosslinking density, improving adhesion and anti-corrosion performance

Inactive Publication Date: 2021-03-12
QINGDAO AIR NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, liquid polysulfide rubber has low tensile strength and elongation, poor aging resistance, and odor. Polysulfide-modified polyurea that uses mercapto and isocyanate reaction will reduce the tensile strength of polyurea and improve the aging resistance. decline

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] An anti-corrosion polyurea coating for the petrochemical industry, including A component and B component, A component includes the following raw materials: polydopamine modified two-dimensional layered material, polyol, polyisocyanate; the B component includes the following Raw materials: amino-terminated polyether, polyol, coupling agent, chain extender, catalyst, water remover and color paste.

[0032] It should be noted that the preparation method of the polydopamine-modified two-dimensional layered material in the examples of the present application is as follows: disperse the two-dimensional layered material into an ethanol solution, then add tris buffer, and ultrasonically disperse , adding dopamine hydrochloride, mixing and stirring, centrifuging, washing and drying to obtain the polydopamine modified two-dimensional layered material.

[0033] Specifically, the two-dimensional layered material in the embodiment of the present application includes molybdenum disul...

Embodiment 2

[0055] A preparation method for anti-corrosion polyurea coatings in the petrochemical industry, including the preparation of A component and B component, wherein,

[0056] The preparation of A component comprises the following steps:

[0057] S1. Add 4 parts by weight of molybdenum disulfide into 50 parts of ethanol solution for ultrasonic dispersion for 0.5 h, then add tris buffer solution with pH of 7.5, ultrasonically treat for 1 h, and then add the parts by weight of 2 parts of dopamine hydrochloride were stirred at 60°C for 6h, then centrifuged at 5000rpm for 5min, and the precipitate was washed three times with ethanol-water solution, and the precipitate was vacuum-dried at 60°C for 12h to obtain polydopamine-modified modified disulfide Molybdenum, sealed up in an inert environment for future use;

[0058] S2. In an inert environment, heat 100 parts by weight of polytetrahydrofuran ether glycol PTMEG1000 under vacuum -0.1MPa to 110°C for 5 hours, release the vacuum, coo...

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Abstract

The invention provides an anticorrosive polyurea coating for petrochemical industry and a preparation method thereof. The anticorrosive polyurea coating comprises a component A and a component B, thecomponent A comprises the following raw materials: a polydopamine modified two-dimensional layered material, polyol and polyisocyanate; and the component B comprises the following raw materials: amine-terminated polyether, polyol, a coupling agent and the like. The anticorrosive polyurea coating contains the polydopamine modified two-dimensional layered material, the chemical structure of polydopamine contains naphthol and has very strong adhesive force to a metal substrate (such as a steel plate), catechol hydroxyl in polydopamine has a very strong complexing effect on metal ions, and by enhancing the adhesive force and forming a nano layer, the corrosion resistance is improved; the two-dimensional layered material is large in unfolding area and small in dosage, and can be uniformly distributed on the polyurea body through polydopamine modification, so that the performance of the two-dimensional layered material is fully exerted, and the adhesive force and the corrosion resistance ofpolyurea are improved while the excellent physical performance of polyurea is maintained.

Description

technical field [0001] The invention relates to the technical field of polyurea coatings, in particular to an anti-corrosion polyurea coating used in the petrochemical industry and a preparation method thereof. Background technique [0002] In petroleum, chemical industry, pipeline, marine engineering and other anti-corrosion fields, most equipment and pipelines are corroded due to the existence of corrosive media. The concentration and temperature of corrosive media change at any time, so the corrosion is very serious. Using various anti-corrosion materials to make the covering layer or lining can completely isolate the metal equipment 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] Heavy-duty anti-corrosion materials refer to anti-corrosion materials that can be used for a long time in harsh corrosive environments, and their service ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/02C09D5/08C09D7/62
CPCC08K2003/3009C08K2201/011C09D5/08C09D175/02C09D7/62C09D7/70C08K9/08C08K7/00C08K3/30
Inventor 王宝柱苏坤黄黎辉岳长山刘晓文
Owner QINGDAO AIR NEW MATERIALS
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