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A solvent-free polyaspartate heavy-duty anti-corrosion coating with a combination of bottom and surface, its preparation method and its application

An aspartic acid ester and aspartic acid technology, applied in the direction of polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve the problems of increasing construction uncontrollability, increasing construction costs, and high parking and maintenance costs, achieving The spraying ratio is stable, the curing rate is fast, and the construction efficiency is improved.

Active Publication Date: 2022-03-08
黄山中邦孚而道涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Then at least two constructions are required for the construction, which increases the construction cost and increases the uncontrollability of the construction. At the same time, for some working conditions, the cost of parking and maintenance is very high. Therefore, in a coastal and offshore environment, The solvent-free polyaspartate heavy-duty anti-corrosion coating that can not only solve the anti-corrosion requirements, but also form a protective coating at one time is the best solution

Method used

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  • A solvent-free polyaspartate heavy-duty anti-corrosion coating with a combination of bottom and surface, its preparation method and its application

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preparation example Construction

[0046] In one embodiment of the present invention, the preparation method of the modified filler includes the following steps: (1) dissolving the silane coupling agent in absolute ethanol to prepare a solution with a mass concentration of 30-50%; (2) dissolving the The solution is sprayed on the filler in a high-speed mixer, stirred evenly at a high speed, dried in a blast drying oven at 100-105° C. for 2-5 hours, and then cooled naturally to obtain a modified filler.

[0047] In one embodiment according to the present invention, the silane coupling agent is γ-aminopropyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, N-( One or a combination of β-aminoethyl)-γ-aminopropyltriethoxysilane and anilinomethyltrimethoxysilane.

[0048] In an embodiment according to the present invention, the preparation method of the hyperbranched modified aspartic acid resin comprises the following steps: (1) In a reactor protected by an inert gas, add three Chlorosilane ethanol...

Embodiment 1

[0064] (1) prepare hyperbranched modified aspartic acid resin:

[0065] (1) Add trichlorosilane ethanol solution with a mass concentration of 10-30% in a nitrogen-protected reactor, and add deionized water drop by drop under stirring. The molar ratio of deionized water to trichlorosilane is 1:3. React at a temperature of 75°C for 0.5 hours, then add hexamethylene diisocyanate, and continue to react for 0.5 hours to obtain a pre-reaction liquid; Add hexamethylenediamine dropwise to the pre-reaction solution to end capping to obtain a silicon block branched modified organic diamine reaction solution; (3) use titration in the above silicon block branched modified organic diamine reaction solution Dimethyl maleate was slowly added dropwise into the funnel. After the dropwise addition, the temperature was raised to 90°C for constant temperature reaction for 10 hours, then the solvent was removed and recovered, and the degree of reaction was determined by mercaptan-iodine titration ...

Embodiment 2

[0072] (1) prepare hyperbranched modified aspartic acid resin:

[0073] (1) In a nitrogen-protected reactor, add trichlorosilane ethanol solution with a mass concentration of 30%, and add deionized water drop by drop under stirring. The molar ratio of deionized water to trichlorosilane is 1:3. React at 85°C for 1 hour, then add isophorone diisocyanate, and continue to react for 1 hour to obtain a pre-reaction liquid; Add 2,2,4-trimethyl-1,6-butanediamine dropwise to the pre-reaction solution to obtain a silicon block branched modified organic diamine reaction solution; (3) in the above silicon block branched Diethyl maleate was slowly added dropwise into the chemically modified organic diamine reaction solution with a titration funnel. After the dropwise addition, the temperature was raised to 100°C for constant temperature reaction for 15 hours, and then the solvent was removed and recovered, and determined by mercaptan-iodine titration analysis method The degree of reaction...

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Abstract

The invention provides a bottom-surface-integrated solvent-free polyaspartate heavy-duty anticorrosion coating, a preparation method and an application thereof. The bottom-surface-integrated solvent-free polyaspartic ester heavy-duty anticorrosion coating comprises A and B components, and by weight, the A component comprises: hyperbranched modified aspartic acid resin 20-40, natural Particic acid resin 10‑30, zinc phosphate 5.2, additives 0.1‑15, modified filler 1‑30, the B component includes: isocyanate 70‑80, diisocyanate prepolymer 20‑30, defoamer 3 ‑5, leveling agent 2‑3. The volume ratio of the A and B components is 1:1, which can be used for anti-corrosion coatings on the inner and outer walls of storage tanks, pipelines and equipment in the petrochemical industry and steel structures. In the present invention, through the specific hyperbranched modification of aspartic acid resin, it has more mild reactive sites, which greatly improves the temperature resistance, wear resistance, corrosion resistance and weather resistance of the coating; the filler Participate in the curing reaction better, and finally make the performance indicators of the coating more excellent, and the comprehensive performance is good.

Description

technical field [0001] The present invention relates to the anti-corrosion coating technology for the inner and outer walls of storage tanks, pipelines and equipment in the field of petrochemical industry and the anti-corrosion coating technology for steel structures. The invention relates to a bottom-surface-integrated solvent-free polyaspartate heavy-duty anticorrosion paint, a preparation method and an application thereof. Background technique [0002] With the increasing requirements of national environmental protection, especially the "GB30981-2020 Limits of Hazardous Substances in Industrial Protective Coatings", the requirements for coating VOC are becoming more and more stringent. In order to reduce VOC emissions, the main schemes of coatings are high-build products, solvent-free products and water-based coating products. However, for most petrochemical fields, the corrosive environment is classified according to ISO12944-2-2017, which belongs to C5 (very high) or C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/02C09D5/08C09D7/62C08G18/64
CPCC09D175/02C09D5/08C09D7/62C08G18/6415C08K2003/3045C08K2003/2241C08K2003/328C08K3/30C08K9/06C08K3/32C08K3/22
Inventor 冯刚
Owner 黄山中邦孚而道涂料有限公司
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