Technological method of preparation of low-temperature curing heavy-duty epoxy powder coating

A technology of epoxy powder and process method, applied in the direction of powder coating, anti-corrosion coating, epoxy resin coating, etc., can solve the problems of inconvenient use, complex process, single color of epoxy powder coating, etc., and achieve anti-scattering performance, The effect of enriching the application field and shortening the preparation time

Inactive Publication Date: 2017-05-10
丹阳市海信涂料化工厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the single color of epoxy powder coating, it needs to be applied to metal equipment, and additional paint is required. The later process is more complicated, and it is difficult to use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The following components are used: epoxy resin 65%, curing agent 15.4%, defoamer 3%, leveling agent 1.8%, anti-skinning agent 0.7%, matting agent 5%, light stabilizer 3%, dispersion 2% antifungal agent, 0.9% antifungal agent, 1.7% fluorine and 0.5% adhesion promoter.

[0038] The preparation time is 15min, and the curing temperature is 102°C. The obtained epoxy powder coating is coated on a PET film, and placed in an ambient temperature above 250°C for normal use without change.

Embodiment 2

[0040] The following components are used: epoxy resin 62%, curing agent 16%, defoamer 1.5%, leveling agent 1.8%, anti-skinning agent 1.6%, matting agent 8%, light stabilizer 3%, dispersion 2% antifungal agent, 0.9% antifungal agent, 1.8% fluorine and 1% adhesion promoter.

[0041]The preparation time is 14.9min, and the curing temperature is 101.98°C. The obtained epoxy powder coating is coated on a PET film, and placed in an ambient temperature above 250°C for normal use without change.

Embodiment 3

[0043] The following components are used: epoxy resin 63%, curing agent 15.5%, defoamer 1.5%, leveling agent 1.8%, anti-skinning agent 1.6%, matting agent 8%, light stabilizer 2.5%, dispersion 2% antifungal agent, 0.9% antifungal agent, 1.8% fluorine and 1% adhesion promoter.

[0044] The preparation time is 15.1min, and the curing temperature is 102.2°C. The obtained epoxy powder coating is coated on a PET film, and placed in an ambient temperature above 250°C for normal use without change.

[0045] The present invention effectively reduces the curing temperature to 102°C, shortens the curing time to 15min, saves energy during the preparation of epoxy powder coatings, and improves the preparation efficiency, and the obtained epoxy powder coatings have better weather resistance, making The coating can be used for a long time in an environment above 250°C, which improves the performance of the epoxy powder coating.

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PUM

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Abstract

The invention discloses a technological method of preparation of a low-temperature curing heavy-duty epoxy powder coating, and the technological method comprises the following steps: A, pulverizing epoxy resin into a fine-particle powder by using a pulverizing apparatus, and then adding other auxiliaries; B, mixing the epoxy resin powder and the auxiliaries, and performing uniform stirring; C, putting the uniformly-stirred mixture in a heating and pressurizing apparatus with the temperature of 100-103 DEG C, and performing heating and pressurizing, so as to obtain a semi-finished product, wherein the time of the heating and pressurizing process is not less than 20 minutes, and the obtained semi-finished product is flaky; D, pulverizing the flaky semi-finished product obtained in the step C, and then adding a polypropylene filler with the weight ratio of 2-3% and a pigment with the weight ratio of 3-5% after pulverization; E, stirring the mixture obtained in the step D and sieving the mixture with a sieve; and F, checking the sieved epoxy-powder coating, and performing packaging. The technological method enriches the application fields of the epoxy powder coating, saves the processes of the later-stage use of the epoxy powder coating, and guarantees relatively good application performance of the epoxy powder coating.

Description

technical field [0001] The invention relates to the technical field of epoxy powder coatings, in particular to a process for preparing low-temperature curing heavy-duty epoxy powder coatings. Background technique [0002] Epoxy powder coating, due to the high curing temperature of powder resin (180-220°C) and long curing time (10-30min), it can only be applied to heat-resistant substrates such as metals, and it is relatively energy-consuming and time-consuming; And because there is a certain overlap between the melt leveling and the initial stage of solidification, if the control is not good, the coating will have defects in flatness, such as shrinkage cavities, orange peel and other problems. For this reason, people have focused on developing UV-curable powder coatings and low-temperature curing powder coatings for heat-sensitive substrates. [0003] Generally speaking, the melting temperature of powder coatings is 90-130°C, and the curing temperature is 130-180°C, but mor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D123/12C09D5/03C09D5/08C09D7/12
Inventor 黄新良
Owner 丹阳市海信涂料化工厂
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