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A solvent-free heavy-duty anti-corrosion coating composition capable of wet coating and its preparation method and application

A solvent-free, heavy-duty anti-corrosion technology, applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve problems such as 100-500 μm at a time, and multiple constructions to achieve film thickness and VOC. Low content, good construction surface tolerance, and the effect of improving construction efficiency

Active Publication Date: 2022-05-06
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The usual solvent-free anti-corrosion coatings require strict GB8923-88Sa2.5 level for construction surface treatment, and it is very difficult to maintain Sa2.5 level in the marine environment
[0003] Patent CN1752162A discloses a marine heavy-duty anti-corrosion coating and its preparation method. It is through modifying liquid epoxy resin to obtain a coating that can be cured underwater. Although the coating can be cured underwater, it only needs to be applied once. It can reach 100-500μm, and it takes multiple constructions to achieve the film thickness, and the surface treatment needs to reach GB8923 St3 level; patent CN104530921A discloses a preparation method of epoxy heavy-duty anti-corrosion coating with toughness, which enhances the coating by adding functional fillers. The tensile strength, compressive strength and bending strength of the layer can reach 2000μm in one construction, but it cannot be cured under water and with a wet surface. This kind of surface treatment level requires St2.5 to show excellent performance.

Method used

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  • A solvent-free heavy-duty anti-corrosion coating composition capable of wet coating and its preparation method and application
  • A solvent-free heavy-duty anti-corrosion coating composition capable of wet coating and its preparation method and application
  • A solvent-free heavy-duty anti-corrosion coating composition capable of wet coating and its preparation method and application

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preparation example Construction

[0081] Another aspect of the embodiments of the present invention also provides a method for preparing the aforementioned wet-appliable solvent-free heavy-duty anti-corrosion coating composition, which includes:

[0082] Mix the composite epoxy resin and reactive diluent evenly, then add thixotropic agent, dispersant, functional filler, pigment and additives and mix evenly to form the first component;

[0083] Mix the cardanol-modified phenalkamine and compound amine curing agent evenly, then add functional additives, accelerators, and non-reactive diluents and mix evenly to form the second component;

[0084] And, uniformly mixing the first component and the second component to form the solvent-free heavy-duty anti-corrosion coating composition capable of wet coating.

[0085] In some more specific embodiments, the preparation method includes:

[0086] Stir and mix the composite epoxy resin and active diluent at a speed of 500-1000r / min, then add the thixotropic agent and st...

Embodiment 1

[0112] Stir and mix bisphenol A epoxy resin, bisphenol F epoxy resin, and reactive diluent cardanol glycidyl ether at a speed of 600r / min. Stir at low temperature for 15 minutes, then add dispersant BYK-9076, rutile titanium dioxide, aluminum clay, silicon micropowder, and barium sulfate recrystallization, and stir for 15 minutes at a speed of 1200r / min and a temperature of 57°C, and finally add a wetting Agent YCK-1450, leveling agent YCK-1530, and defoamer BYK-066 are mixed evenly to form the first component; (the content of each component in the first component is shown in Table 1)

[0113] Stir and mix cardanol-modified phenalkamine and complex amine curing agent at a speed of 600r / min, then add defoamer BYK-066 and accelerator K54 and mix evenly, then add inactive diluent to the obtained mixture The cashew nut shell oil polyol is mixed uniformly to form the second component; (wherein the content of each component in the second component is as shown in Table 2)

[0114] M...

Embodiment 2

[0117] Stir and mix bisphenol A epoxy resin, bisphenol F epoxy resin, and reactive diluent cardanol glycidyl ether at a speed of 600r / min. Stir at low temperature for 15 minutes, then add dispersant BYK-9076, rutile titanium dioxide, aluminum clay, silicon micropowder, and barium sulfate recrystallization, and stir for 15 minutes at a speed of 1200r / min and a temperature of 57°C, and finally add a wetting Agent YCK-1450, leveling agent YCK-1530, and defoamer BYK-066 are mixed evenly to form the first component; (the content of each component in the first component is shown in Table 1)

[0118] Stir and mix cardanol-modified phenalkamine and complex amine curing agent at a speed of 600r / min, then add defoamer BYK-066 and accelerator K54 and mix evenly, then add inactive diluent to the obtained mixture The cashew nut shell oil polyol is mixed uniformly to form the second component; (wherein the content of each component in the second component is as shown in Table 2)

[0119] M...

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Abstract

The invention discloses a solvent-free heavy-duty anti-corrosion coating composition capable of wet coating, its preparation method and application. The coating composition includes a first component and a second component that cooperate with each other; wherein, the first component includes a composite epoxy resin and a reactive diluent, and the composite epoxy resin includes two or more The epoxy resin; the second component includes cardanol modified phenalkamine, complex amine curing agent and non-reactive diluent. The composition of the present invention uses reactive diluents and non-reactive diluents to completely replace the organic volatile components to obtain a solvent-free coating composition. The thickness of the coating can reach 1200 microns once, and the cured coating has high hardness, Good toughness, excellent crack resistance, cathodic disbonding resistance and long-term salt spray resistance, it can provide long-term and effective protection for marine environment, industrial corrosion environment or buried metal structural components.

Description

technical field [0001] The invention belongs to the technical field of surface materials for corrosion protection, and in particular relates to a solvent-free heavy-duty anti-corrosion coating composition capable of wet coating and its preparation method and application. The composition has long-term anti-corrosion performance and is used in marine and industrial altitude It is suitable for the protection of steel equipment in a corrosive environment, and does not contain organic volatile solvents. It can be sprayed at one time to obtain a thick film coating to improve construction efficiency. Background technique [0002] At present, the utilization of marine resources has become more and more extensive, including offshore wind power, deep-sea oil drilling platforms, coastal petrochemical parks and many other fields. The construction of equipment and devices is inseparable from marine anti-corrosion, and the uncontrollability of the ocean makes anti-corrosion construction d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/08C09D7/61C08G59/62C08G59/56
CPCC09D163/00C09D5/08C09D7/61C08G59/623C08G59/56C08L2205/025C08K2003/2241C08K2003/3045C08L63/00C08K3/22C08K3/346C08K3/36C08K3/30
Inventor 危春阳汤吉运李宗魁安晓伟刘立伟
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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