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A kind of low-temperature fast-curing epoxy powder coating and preparation method thereof

A fast-curing, epoxy powder technology, used in epoxy resin coatings, anti-corrosion coatings, coatings, etc., to achieve the effect of reducing energy consumption, good market application prospects, and strong adhesion

Active Publication Date: 2016-05-11
洛阳双瑞防腐工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the above prior art, the object of the present invention is to provide a low-temperature fast-curing epoxy powder coating, which is an epoxy powder coating suitable for heat-sensitive substrates and has excellent anti-corrosion performance, environmental protection and energy saving, and solves the problem of Solved the problem that the powder coating process requires both low temperature and high efficiency in the market. The resulting paint film not only has the advantages of strong adhesion and alkali resistance of epoxy resin, but also has the water resistance and solvent resistance of phenolic resin. And acid resistance, etc., and the paint film has good heat resistance, excellent resistance to cathodic disbonding, and has a good market application prospect

Method used

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  • A kind of low-temperature fast-curing epoxy powder coating and preparation method thereof

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Effect test

Embodiment 1

[0021] A low-temperature fast-curing epoxy powder coating has the following formula by weight percentage: 30 parts of bisphenol A epoxy resin, 15 parts of novolak epoxy resin, 1 part of triglycidyl isocyanurate, long-chain polyamine curing agent 8 parts, 0.1 part of diphenyl imidazoline, 30 parts of precipitated barium sulfate, 8 parts of mica powder, 5 parts of titanium dioxide, 1 part of titanate coupling agent, 1 part of general leveling agent, 0.5 part of benzophenone , 0.3 parts of fumed silica.

[0022] The preparation process is as follows:

[0023] (1) Weigh epoxy resin, curing agent, pigments and fillers and additives according to the dosage of the formula, and pre-mix on a high-speed mixer for 3 minutes.

[0024] (2) A twin-screw extruder with a screw length-to-diameter ratio of 16:1 and a rotational speed of 500r / min is used for melt extrusion. The temperature in zone I is set at 120°C, the temperature in zone II is set at 97°C, and the temperature in zone III is s...

Embodiment 2

[0027] A low-temperature fast-curing epoxy powder coating has the following formula by weight percentage: 52 parts of bisphenol A epoxy resin, 13 parts of novolac epoxy resin, 5 parts of triglycidyl isocyanurate, long-chain polyamine curing agent 18 parts, 0.5 part of diphenylimidazoline, 4 parts of precipitated barium sulfate, 4 parts of mica powder, 2 parts of titanium dioxide, 0.5 part of titanate coupling agent, 0.5 part of general leveling agent, 0.4 part of benzophenone , 0.1 part of fumed silica.

[0028] The preparation process is as follows:

[0029] (1) Weigh the epoxy resin, curing agent, pigments and fillers and additives according to the dosage of the formula, and pre-mix them on a high-speed mixer for 5 minutes.

[0030] (2) A twin-screw extruder with a screw length-to-diameter ratio of 16:1 and a rotational speed of 500r / min is used for melt extrusion. The temperature in zone I is set at 110°C, the temperature in zone II is set at 90°C, and the temperature in z...

Embodiment 3

[0033] A low-temperature fast-curing epoxy powder coating has the following formula by weight percentage: 45 parts of bisphenol A epoxy resin, 15 parts of novolac epoxy resin, 3 parts of triglycidyl isocyanurate, long-chain polyamine curing agent 15 parts, 0.4 parts of dimethylimidazole, 9 parts of precipitated barium sulfate, 6 parts of mica powder, 3.8 parts of titanium dioxide, 0.8 parts of silane coupling agent, 0.8 parts of general leveling agent, 1 part of benzophenone, gas phase dioxide Silicon 0.2 parts.

[0034] The preparation process is as follows:

[0035] (1) Weigh the epoxy resin, curing agent, pigments and fillers and additives according to the dosage of the formula, and pre-mix them on a high-speed mixer for 5 minutes.

[0036] (2) A twin-screw extruder with a screw length-to-diameter ratio of 16:1 and a rotational speed of 500r / min is used for melt extrusion. The temperature in zone I is set at 115°C, the temperature in zone II is set at 95°C, and the tempera...

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Abstract

A low-temperature fast-curing epoxy powder coating, which is composed of 45-65% epoxy resin, 1-5% polyepoxy active crosslinking agent, 8-18% curing agent, and 0.1-65% curing accelerator by weight. 0.5%, precipitated barium sulfate 4~30%, mica powder 4~8%, titanium dioxide 2~5%, adhesion promoter 0.5~1.0%, and additives. The epoxy powder coating of the present invention adopts the resin system of high molecular weight bisphenol A type epoxy resin and novolac epoxy resin blending, and after being cured by curing agent, the obtained paint film has strong adhesion of epoxy resin and alkali resistance It has good advantages, and has the excellent characteristics of water resistance, solvent resistance and acid resistance of phenolic resin, and the heat resistance of the paint film is good. Therefore, the epoxy powder coating of the present invention can adapt to high temperature and strong corrosion environment, and has good market application prospect.

Description

technical field [0001] The invention belongs to the field of powder coatings, and in particular relates to a low-temperature fast-curing epoxy powder coating and a preparation method thereof. Background technique [0002] With the rapid development of the domestic economy, the consumption of oil and natural gas has increased rapidly year by year, resulting in an increasing demand for the construction of oil and gas pipelines. Since natural gas and oil are mostly concentrated in extreme environments such as deserts, polar tundra, and oceans, higher requirements are placed on the reliability and economy of pipelines. In order to ensure the structural stability, safety and economy of the pipeline, the use of high-grade pipeline steel (X80, X100, X120) will become the development trend of pipeline construction in the future. Powder coating is a recognized 4E type coating product with high production efficiency, excellent film performance, eco-environmental protection, and econo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/02C09D163/04C09D5/08C09D7/12
Inventor 张延奎
Owner 洛阳双瑞防腐工程技术有限公司