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Long-acting anti-corrosion solvent-free universal epoxy coating and preparation method thereof

An epoxy coating, long-term anti-corrosion technology, applied in the direction of anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problems of large internal stress in the system, easy oil surface, small molecular weight, etc., to increase the penetration distance, improve Dispersion effect, effect of large specific surface area

Active Publication Date: 2020-12-04
XIAMEN SUNRUI SHIP COATING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The general-purpose epoxy coatings described in the above-mentioned patents have excellent performance, but a large amount of solvents (ranging from 8 to 20 parts) are used in the formulations, which belong to solvent-based general-purpose epoxy coatings with high VOC content and insufficient environmental protection.
In addition, unlike solvent-based general-purpose epoxy coatings, solvent-free epoxy coatings are less flexible and anti-corrosion than solvent-based coatings due to the small molecular weight of raw materials and large internal stress in the system, and are prone to corrosion in low-temperature environments and high-humidity environments. Problems such as oil surface and loss of light appear

Method used

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  • Long-acting anti-corrosion solvent-free universal epoxy coating and preparation method thereof
  • Long-acting anti-corrosion solvent-free universal epoxy coating and preparation method thereof
  • Long-acting anti-corrosion solvent-free universal epoxy coating and preparation method thereof

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preparation example Construction

[0054] The present invention provides a kind of preparation method of long-acting anticorrosion solvent-free general-purpose epoxy paint, comprises the preparation of first component and second component, and its preparation steps are as follows:

[0055] The preparation method of the first component is:

[0056] (1) Add epoxy resin, adipic acid modified epoxy resin, graphene dispersion, dispersant, defoamer, and leveling agent to the dispersion cylinder under low-speed stirring at 50-100rpm, and stir at a low speed of 1500rpm Disperse for 5-10 minutes;

[0057] (2) Add body filler and anti-rust filler, disperse at 3000rpm at high speed for 40-60min until the fineness is ≤80μm;

[0058] (3) Add a thixotropic agent to disperse at a high speed, keep the temperature at 55-65°C and continue to disperse for 25 minutes;

[0059] (4) Filtration and packaging to obtain finished products.

[0060] The preparation method of the second component is:

[0061] (1) Under low-speed stirr...

Embodiment 1

[0071] The epoxy resin in the first component is E51, and its epoxy equivalent is 196g / eq; The viscosity of the adipic acid modified epoxy resin is 600cp, and the epoxy value is 0.26; The dispersant is excellent Card 710S, the leveling agent is Euca 384S, the defoamer is Euca 272S, the body filler is feldspar powder, the antirust filler is nano-iron titanium powder, and the thixotropic agent is LV;

[0072] The amine value of curing agent a in the second component is 260-320 mgKOH / g, the amine value of curing agent b is 330-380 mgKOH / g, and the mass ratio of curing agent a to curing agent b is 1 : 3; the epoxy resin is E51, the aminosilane coupling agent is KH550, and the accelerator is DMP-30;

Embodiment 2

[0074] The epoxy resin in the first component is E51, and its epoxy equivalent is 196g / eq; the viscosity of the adipic acid modified epoxy resin is 650cp, and the epoxy value is 0.26; the dispersant is BYK -110, the leveling agent is BYK-320, the defoamer is Euka BYK-A530, the body filler is feldspar powder, the antirust filler is nano-iron titanium powder, and the thixotropic agent is LV;

[0075] The amine value of curing agent a in the second component is 260-320 mgKOH / g, the amine value of curing agent b is 330-380 mgKOH / g, and the mass ratio of curing agent a to curing agent b is 1 : 1; the epoxy resin is E51, the aminosilane coupling agent is KH550, and the accelerator is K54;

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Abstract

The invention relates to the technical field of anti-corrosion coatings, and particularly relates to a long-acting anti-corrosion solvent-free universal epoxy coating and a preparation method thereof.The long-acting anti-corrosion solvent-free universal epoxy coating comprises a first component and a second component, wherein the first component comprises epoxy resin, adipic acid modified epoxy resin and graphene dispersion liquid; and the second component comprises an amine mixed curing agent and an amino silane coupling agent. The coating provided by the invention effectively solves the problems of large internal stress, poor coating flexibility and corrosion resistance, easiness in oil surface and gloss loss in a low-temperature environment and a high-humidity environment and the likeof an existing solvent-free epoxy coating system, has excellent corrosion resistance, good recoatability, excellent matching performance with various finishing paints, good weather resistance and thelike, has good film-forming property in low-temperature and high-humidity environments, has no oil surface or gloss loss, and achieves the technical goals of universality of the whole ship and universality in four seasons.

Description

technical field [0001] The invention relates to the technical field of anti-corrosion coatings, in particular to a long-acting anti-corrosion solvent-free universal epoxy coating and a preparation method thereof. Background technique [0002] With the upgrading of environmental protection concepts and requirements, modern marine protective coatings have also entered a new stage characterized by long-term effect, economy and environmental protection. Ultra-high solid content and solvent-free epoxy coatings have become an important direction for the development of heavy-duty marine coatings. General-purpose epoxy coatings can be applied to various parts of the ship, and can be used in conjunction with cathodic protection technology. It has excellent corrosion resistance and compatibility, can effectively reduce the variety of coatings, simplify the coating process, and is favored by various shipyards and shipowners. [0003] Application No. 201110351130.6 "A High-performance, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/08C09D7/61C09D7/63C09D7/65C08G59/50
CPCC08G59/50C08L2205/025C08L2205/03C09D5/08C09D5/084C09D163/00C09D7/61C09D7/63C09D7/65C08L63/00C08L57/02C08K3/042C08K3/34C08K5/544C08K13/02
Inventor 康瑞瑞李陈郭魏金伯李至秦
Owner XIAMEN SUNRUI SHIP COATING
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