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Primer-topcoat type solvent-free polyaspartic acid ester heavy anti-corrosion coating and preparation method and application thereof

A technology of aspartic acid ester and aspartic acid, which is applied in the direction of polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve the problems of increased construction costs, increased construction uncontrollability, high parking maintenance costs, etc., to achieve The curing rate is fast, the spraying ratio is stable, and the effect of improving construction efficiency

Active Publication Date: 2021-11-12
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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  • Primer-topcoat type solvent-free polyaspartic acid ester heavy anti-corrosion coating and preparation method and application thereof
  • Primer-topcoat type solvent-free polyaspartic acid ester heavy anti-corrosion coating and preparation method and application thereof
  • Primer-topcoat type solvent-free polyaspartic acid ester heavy anti-corrosion coating and preparation method and application thereof

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preparation example Construction

[0032] In one embodiment according to the present invention, the preparation method of the modified filler comprises 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.

[0033] In one embodiment according to the present invention, the silane coupling agent is γ-aminopropyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, N-β - one or a combination of (aminoethyl)-γ-aminopropyltriethoxysilane and anilinomethyltrimethoxysilane.

[0034] 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 reaction kettle protected by an inert gas, add a mass ...

Embodiment 1

[0050] (1) prepare hyperbranched modified aspartic acid resin:

[0051] (1) In a nitrogen-protected reactor, add trichlorosilane ethanol solution with a mass concentration of 10-30%, 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 solution; Add hexamethylenediamine dropwise to the pre-reaction solution to end-cap, to obtain a silicon block branched modified organic diamine reaction solution; (3) in the above silicon block branched modified organic diamine reaction solution, use titration 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 ana...

Embodiment 2

[0058] (1) prepare hyperbranched modified aspartic acid resin:

[0059] (1) In the 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 liquid to end capping, and obtain a silicon block branched modified organic diamine reaction liquid; (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 deg...

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Abstract

The invention provides a primer-topcoat type solvent-free polyaspartic acid ester heavy anti-corrosion coating and a preparation method and application thereof. The primer-topcoat type solvent-free polyaspartic acid ester heavy anti-corrosion coating comprises a component A and a component B. The component A comprises, in parts by weight, 20-40 parts of hyperbranched modified aspartic acid resin, 10-30 parts of aspartic acid resin, 5.2 parts of zinc phosphate, 0.1-15 parts of an auxiliary agent and 1-30 parts of a modified filler, and the component B comprises, by weight, 70-80 parts of isocyanate, 20-30 parts of a diisocyanate prepolymer, 3-5 parts of an antifoaming agent and 2-3 parts of a leveling agent. The volume ratio of the component A to the component B is 1: 1, and the coating can be used for corrosion prevention of inner and outer walls of storage tanks, pipelines and equipment and corrosion prevention of steel structures in the field of petrochemical engineering. The asparaginic acid resin is subjected to specific hyperbranched modification so that the asparaginic acid resin has more mild reaction active sites, and the temperature resistance, wear resistance, corrosion resistance and weather resistance of the coating are greatly improved; and the filler better participates in the curing reaction, so that the coating is more excellent in various performance indexes and good in comprehensive performance.

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 Applications(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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