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Low-temperature cured outdoor super-weather-resistant and corrosion-resistant powder coating and preparation method thereof

A powder coating and ultra-weather-resistant technology, used in powder coatings, anti-corrosion coatings, polyester coatings, etc., can solve problems such as poor results, save curing energy consumption, ensure coating stability, and excellent impact resistance.

Pending Publication Date: 2020-06-09
浙江绿环新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned powder coatings use weather-resistant pigments to improve the super-weather resistance of powder coatings, but the effect is not good

Method used

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  • Low-temperature cured outdoor super-weather-resistant and corrosion-resistant powder coating and preparation method thereof
  • Low-temperature cured outdoor super-weather-resistant and corrosion-resistant powder coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0035] Preparation of super weather-resistant polyester resin:

[0036] Put neopentyl glycol and terephthalic acid into the reaction device according to the reaction ratio, and at the same time use monobutyltin oxide accounting for 0.05% of the mass of the reactant as a catalyst and trimethylolpropane accounting for 2% of the mass of the reactant Chain agent, filled with nitrogen to protect, heat up to 160°C to start esterification reaction, and distill water, control the heating rate to 250°C to keep warm, react to 95% of the theoretical value, add phthalic acid blocking agent accounting for 10% of the mass of the reactant , Reaction at 240-250°C for 40-50 minutes, vacuum polycondensation for 40-60 minutes to obtain super weather-resistant polyester resin.

[0037] Preparation of low-temperature curing outdoor super weather-resistant and corrosion-resistant powder coatings

[0038] Prepare the following components in parts by mass: 100 parts of super weather-resistant polyes...

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Abstract

The invention belongs to the technical field of powder coatings, and relates to a low-temperature cured outdoor super-weather-resistant and corrosion-resistant powder coating. The coating is preparedfrom the following components in parts by mass: 100 parts of super-weather-resistant polyester resin, 30-50 parts of precipitated barium sulfate, 5-10 parts of TGIC, 0.1-1 part of an ultraviolet lightabsorber, 0.1-1 part of an antioxidant and a plurality of auxiliaries. The invention also provides a preparation method of the powder coating. The preparation method comprises the following steps: premixing the components, and then sequentially carrying out melting, mixing, tabletting, cooling, crushing, grinding, cyclone separation and screening to obtain finished powder. The low-temperature cured outdoor super-weather-resistant and corrosion-resistant powder coating provided by the invention can be cured at a low temperature, so that energy sources are saved, and the application range of the powder coating is also expanded; and meanwhile, the weather resistance and the corrosion resistance are very good.

Description

technical field [0001] The invention belongs to the technical field of powder coatings, and relates to a low-temperature curing outdoor super-weather-resistant and corrosion-resistant powder coating and a preparation method thereof. Background technique [0002] Compared with traditional solvent-based coatings, powder coatings have the advantages of no solvent, high utilization rate, and easy automatic production. But at the same time, powder coating must be baked and cured at high temperature, usually at 180-200°C, which not only violates the advocacy of energy saving and emission reduction, but also cannot be applied to the coating of heat-sensitive materials. How to reduce the curing temperature of powder coatings to save energy and expand the application range has always been one of the development directions of powder coatings. In addition, when powder coatings are used outdoors, very high requirements are put forward for their super weather resistance and corrosion re...

Claims

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Application Information

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IPC IPC(8): C09D167/02C09D5/08C09D5/03C09D7/61C09D7/63C09D7/48C08G63/20
CPCC08G63/20C08K2003/3045C09D5/033C09D5/08C09D167/02C08K13/02C08K3/30C08K5/1345C08K5/3492C08K5/3475
Inventor 黄心一阮惬冰李俊杰
Owner 浙江绿环新材料科技有限公司
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