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Special anticorrosive powder coating for high-decorativeness pure polyester aluminum section and preparation method of powder coating

A polyester aluminum profile, powder coating technology, applied in powder coatings, anti-corrosion coatings, polyester coatings, etc., to improve the poor leveling of the paint film, improve the appearance smoothness of the paint film, and improve the effect of particle problems

Active Publication Date: 2015-01-07
西北永新涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of this invention is to provide a special anti-corrosion powder coating for high decorative pure polyester aluminum profiles, which has high weather resistance and good flow It can improve the appearance of poor flatness and particle problems caused by uneven spraying during construction.

Method used

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  • Special anticorrosive powder coating for high-decorativeness pure polyester aluminum section and preparation method of powder coating
  • Special anticorrosive powder coating for high-decorativeness pure polyester aluminum section and preparation method of powder coating
  • Special anticorrosive powder coating for high-decorativeness pure polyester aluminum section and preparation method of powder coating

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The ratio of raw materials is as follows: 44kg of carboxyl-terminated polyester resin A, 4kg of carboxyl-terminated polyester resin C, 3.8kg of triglycidyl isocyanurate, 18.5kg of titanium dioxide, 27kg of ultrafine barium sulfate, 0.8kg of charging agent, dry powder 0.5kg of flow aid, 0.6kg of benzophenone ketone, 1.2kg of polyacrylate and 0.6kg of acrylate copolymer; among them, the acid value of carboxyl-terminated polyester resin A is 32-38mgKOH / g, and the softening point is 115-120°C The glass transition temperature is 57-60°C; the acid value of carboxyl-terminated polyester resin C is 30-35mgKOH / g, the softening point is 105-120°C, and the glass transition temperature is 55-60°C.

[0035] The epoxy value of triglycidyl isocyanurate is 0.9257-0.96, the epoxy equivalent is 100 / g, and the average equivalent E is 105. The average particle size of ultra-fine barium sulfate is 1.09, the whiteness is ≥90, and the oil absorption is 16, of which BaSO 4 The content is 97.6...

Embodiment 2

[0041] The ratio of raw materials is as follows: 43.2kg of carboxyl-terminated polyester resin A, 4.5kg of carboxyl-terminated polyester resin C, 3.6kg of triglycidyl isocyanurate, 18.3kg of titanium dioxide, 26.3kg of ultrafine barium sulfate, and 0.49 kg of charging agent kg, dry powder flow aid 0.29kg, benzoethanol ketone 0.49kg, polyacrylate 1.17kg and acrylate copolymer 0.49kg; among them, the acid value of carboxyl-terminated polyester resin A is 32-38mgKOH / g, and the softening point is 115 -120°C glass transition temperature 57-60°C; acid value of carboxyl-terminated polyester resin C 30-35mgKOH / g, softening point 105-120°C glass transition temperature 55-60°C.

[0042] The epoxy value of triglycidyl isocyanurate is 0.9257-0.96, the epoxy equivalent is 100 / g, and the average equivalent E is 105. Ultrafine barium sulfate D has an average particle size of 1.09, whiteness ≥ 90, and oil absorption of 16, of which BaSO 4The content is 97.65%.

[0043] The preparation proce...

Embodiment 3

[0048] The ratio of raw materials is as follows: 43.5kg of carboxyl-terminated polyester resin A, 4.5kg of carboxyl-terminated polyester resin C, 3.5kg of triglycidyl isocyanurate, 18.3kg of titanium dioxide, 26.5kg of ultrafine barium sulfate, and 0.6 kg, 0.4kg of dry powder flow aid, 0.55kg of benzophenone ketone, 1.0kg of polyacrylate and 0.55kg of acrylic copolymer; among them, the acid value of carboxyl-terminated polyester resin A is 32-38mgKOH / g, and the softening point is 115 -120°C glass transition temperature 57-60°C; acid value of carboxyl-terminated polyester resin C 30-35mgKOH / g, softening point 105-120°C glass transition temperature 55-60°C.

[0049] The epoxy value of triglycidyl isocyanurate is 0.9257-0.96, the epoxy equivalent is 100 / g, and the average equivalent E is 105. The average particle size of ultra-fine barium sulfate is 7.16, the whiteness is 91.5, and the oil absorption is 11, of which BaSO 4 The content is 97.15%.

[0050] The preparation process...

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Abstract

The invention discloses a special anticorrosive powder coating for a high-decorativeness pure polyester aluminum section and a preparation method of the powder coating. The powder coating comprises the following raw materials: carboxyl-terminated polyester resin, triglycidyl isocyanurate, titanium dioxide, ultrafine barium sulfate, a charging additive, a dry flow additive, benzoin, a leveling agent and a brightening agent. The preparation method mainly comprises the following steps: firstly, uniformly premixing the raw materials; secondly, performing melt extrusion; finally, performing crushing and ultrafine grinding. The powder coating prepared by the method is strong in adaptability to different thickness of coatings, and has relatively good leveling effects on thick coating (not less than 120 microns) and thin coating (not more than 60 microns); especially, the phenomena of melt falling and non-uniform thickness of powder applied to a workpiece due to influence of gravity on the powder product sprayed by vertical spraying equipment at the construction site in baking and curing processes are greatly reduced, and a paint film is excellent in appearance and free of particle phenomenon during thin coating.

Description

technical field [0001] The present invention relates to a coating. Background technique [0002] Powder coatings for aluminum profiles, generally pure polyester powder coatings, are mainly used for coating aluminum alloy doors and windows and other building materials in outdoor buildings. Based on the coating characteristics of architectural aluminum profiles, the applicable powder coatings have the characteristics of high weather resistance, various colors and artistic effects, good construction adaptability, high leveling appearance design, and strong corrosion resistance. [0003] With the gradual improvement of the spraying automation degree of powder coating construction, the original manual spraying has been changed to mechanized automatic spraying. It is inevitable that the painted workpiece will be partially sprayed thickly or partially sprayed thinly during the construction process, so that the paint Problems with orange peel or particles appearing on the film app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C09D5/08C09D5/03C09D7/12
CPCC08L2205/025C08L2205/035C09D5/038C09D5/08C09D7/61C09D7/63C09D167/00C08L67/00C08L33/04C08K13/02C08K5/34924C08K2003/2237C08K2003/3045
Inventor 强富彬张梅杨嘉
Owner 西北永新涂料有限公司
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