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Low temperature curing epoxy coating and preparation method thereof

An epoxy coating, low temperature technology, applied in the field of coatings, can solve the problems of slow reaction, inability to achieve winter construction, etc., and achieve the effects of fast hydrolysis and crosslinking, improving storage stability, and improving dryness and crosslinking density.

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

AI Technical Summary

Problems solved by technology

When the temperature is lower than 10°C, the reaction between the polyamide curing agent and the low-molecular-weight epoxy resin becomes very slow, although it is possible to obtain a low temperature (7-10°C) by using dimethylaminomethylphenol as a curing accelerator. The lower curing rate, however, still cannot meet the requirements of winter construction

Method used

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  • Low temperature curing epoxy coating and preparation method thereof
  • Low temperature curing epoxy coating and preparation method thereof
  • Low temperature curing 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] E20 epoxy resin: 35, E44 epoxy resin: 22, xylene: 11, butanol: 5, absolute ethanol: 5, N-(n-butyl)-γ-aminopropyltrimethoxysilane: 40.

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

[0027] Add E20 epoxy resin, E44 epoxy resin, xylene, and butanol into the reaction tank, stir evenly, add N-(n-butyl)-γ-aminopropyltrimethoxysilane, and heat up to 50°C for 6 hours , lower the temperature to below 25°C and add absolute ethanol to obtain a silane-modified epoxy resin.

[0028] The above-mentioned silane-modified epoxy resins were used to prepare low-temperature curing epoxy coatings.

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

[0030]

[0031] Embodiment 1-3 component B raw material parts by weight are shown in the following table:

[0032]

[0033] The crosslinking agent is vinyltrimethoxysilane. The r...

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Abstract

The invention discloses a low-temperature curing epoxy coating. The coating consists of a component A and a component B. The component A consists of the following raw materials by weight: silane-modified epoxy resin: 25-35, Dispersant: 0.2‑0.5, Molecular Sieve: 2‑4, Bentonite: 0.2‑0.4, Polyamide Wax: 0.5‑0.8, Red Iron Oxide: 12‑15, Aluminum Tripolyphosphate: 8‑10, Zinc Phosphate: 12‑16 , precipitated barium sulfate: 11-13, mica powder: 5-7, cross-linking agent: 4-6, polyester polyol 5-7; the component B is HDI trimer: 20-25, drier 0.5, reactive diluent: 3‑6. The coating can be cured and dried at a low temperature of ‑25°C and has excellent resistance to salt spray.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a low-temperature curing 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, and excellent adhesion to various substrates. As long-term anti-corrosion protective coatings, they have been widely used in ships, marine engineering, etc. field. At present, most domestic epoxy anti-corrosion coatings use polyamide curing agents for room temperature curing coatings. When the temperature is lower than 10°C, the reaction between the polyamide curing agent and the low molecular weight epoxy resin becomes very slow, although it is possible to obtain a low temperature (7-10°C) by using dimethylaminomethylphenol as a curing accelerator. The lower curing rate, however, still can...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D5/08C09D7/61C09D7/63C09D7/20C08G18/58C08G18/42
CPCC09D175/04C09D5/08C09D5/18C09D7/61C09D7/63C09D7/20C08G18/588C08G18/42C08G18/4045C08L2312/08C08L2201/08C08K13/04C08K5/5425C08K7/24C08K3/346
Inventor 刘宏生王艳凌芹田鹏辉武海龙朱立岩李爱平
Owner 石家庄市油漆厂
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