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Low-temperature curing high-solid epoxy coating and preparation method thereof

A high-solid, epoxy-based technology, applied in anti-corrosion coatings, fire-resistant coatings, coatings, etc., can solve the problems of affecting the anti-corrosion performance of coatings, slow film-forming reaction, etc., and achieve excellent hardness and salt spray resistance. Excellent mechanical properties and the effect of increasing crosslink density

Active Publication Date: 2022-04-05
石家庄市油漆厂
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under normal circumstances, the film-forming reaction of epoxy resin coatings is slow at low ambient temperatures (generally below 10°C), and the coating film cannot be fully cured, especially at temperatures below 0°C. The reaction speed is very slow, which affects its scope of application. Anti-corrosion properties of the coating

Method used

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  • Low-temperature curing high-solid epoxy coating and preparation method thereof
  • Low-temperature curing high-solid epoxy coating and preparation method thereof
  • Low-temperature curing high-solid epoxy coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0024] Prepare silane-modified epoxy resin according to the following formula:

[0025] E51 epoxy resin: 30, E20 epoxy resin: 30, xylene: 9, butanol: 4, absolute ethanol: 5, 3-(2,3-epoxypropoxy)propyltrimethoxysilane: 5 , 3-isocyanatopropyltrimethoxysilane: 20, dibutyltin dilaurate: 1.

[0026] Silane-modified epoxy resin is prepared by the following method:

[0027] Add E51 epoxy resin, E20 epoxy resin, xylene, and butanol into the reaction tank, stir evenly, add 3-isocyanatopropyltrimethoxysilane, dibutyltin dilaurate, heat up to 80°C, and stir to react After 4 hours, the temperature was lowered to below 25°C, and 3-(2,3-glycidoxy)propyltrimethoxysilane and absolute ethanol were added and stirred evenly.

[0028] The above-mentioned silane-modified epoxy resin was used to prepare low-temperature curing high-solid epoxy coatings.

[0029] Embodiment 1-3 component A raw material parts by weight are shown in the following table:

[0030]

[0031]

[0032] Embodiment 1...

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Abstract

The invention discloses a low-temperature curing high-solid epoxy coating. The coating is composed of component A and component B, and the component A is composed of the following raw materials in parts by weight: silane-modified epoxy resin: 26‑35, dispersant: 0.3‑0.5, molecular sieve: 1‑3, bentonite: 0.2‑0.4, silica: 0.2‑0.4, red iron oxide: 13‑17, aluminum tripolyphosphate: 8‑12, zinc phosphate : 8‑12, mica powder: 4‑6, precipitated barium sulfate: 10‑15, crosslinking agent: 3‑5, 50% E12 epoxy resin liquid: 3‑5, xylene: 4‑6; Component B is composed of the following raw materials in parts by weight: reactive diluent: 2-3, tertiary amine accelerator: 0.5-1, cashew nut shell oil modified amine curing agent: 14-16, drier: 0.5, two Toluene: 3-5. The coating can be cured and dried at -25°C, and has excellent hardness and salt spray resistance.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a low-temperature curing high-solid epoxy coating, and at the same time, the invention also relates to a preparation method of the coating. Background technique [0002] Epoxy resin coatings have excellent anti-corrosion and chemical resistance properties, good mechanical properties of the paint film, excellent adhesion to various substrates, good matching performance with various coatings, and can be used with fluorocarbon coatings, polyurethane coatings, High-performance coatings such as acrylic coatings form a supporting system to form a long-lasting anti-corrosion coating. However, under normal circumstances, the film-forming reaction of epoxy resin coatings is slow at low ambient temperatures (generally below 10°C), and the coating film cannot be fully cured, especially at temperatures below 0°C. The reaction speed is very slow, which affects its scope of application. Anti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D4/06C09D5/08C09D7/61C09D7/63C08G59/14C08G59/50C08G59/68
CPCC09D4/06C09D7/61C09D7/63C09D7/70C09D5/18C09D5/08C08G59/1477C08G59/145C08G59/50C08G59/686
Inventor 王艳希国栋程皓然朱小辉刘占京张子腾
Owner 石家庄市油漆厂
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