A kind of polyurethane wood grain powder coating for aluminum profiles

A powder coating and polyurethane technology, applied in polyurea/polyurethane coatings, powder coatings, anti-corrosion coatings, etc., can solve the problem of not paying attention to the surface gloss of aluminum profiles and the annual performance of aluminum profiles, affecting the surface brightness of aluminum profiles, and dust contamination And other problems, to achieve the effect of improving anti-corrosion performance, preventing air bubbles or falling off, and improving aesthetics

Active Publication Date: 2021-11-02
ZHEJIANG CHAOLANG ADVANCED MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the powder coating does not pay attention to the glossiness of the surface of the aluminum profile and the annual performance of the coating and the aluminum profile
[0010] After the existing aluminum profile is processed and formed, the surface of the aluminum profile needs to be treated to make the surface of the aluminum profile appear mirror or matte. However, if the aluminum profile is placed in the air for a long time, it will react with carbon dioxide and oxygen in the air, making it It is dull or has spots. After contact with the human body, it will be contaminated with sweat, oil and dust in the air, which will affect the brightness of the surface of the aluminum profile. The glossiness of aluminum ensures its long-term effectiveness

Method used

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  • A kind of polyurethane wood grain powder coating for aluminum profiles
  • A kind of polyurethane wood grain powder coating for aluminum profiles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1 A kind of surface treatment process of aluminum profiles

[0054] Described technique comprises the following steps:

[0055] (1) Surface pretreatment of aluminum profiles

[0056] The pretreatment is to clean the aluminum profile, remove the dust on the surface, and obtain the pretreated aluminum profile;

[0057] (2) Soaking treatment of aluminum profiles

[0058] The soaking is to put the pretreated aluminum profile in the step (1) into the soaking solution for 10-15 minutes to soak, so as to obtain the soaked aluminum profile;

[0059] The soaking solution is a mixture of sodium bicarbonate solution with a mass fraction of 5% and a sodium hydroxide solution with a mass fraction of 3%, and the volume ratio of the two is sodium bicarbonate solution: potassium hydroxide solution is 1:4;

[0060] (3) Drying treatment of aluminum profiles

[0061] The drying process is to place the soaked aluminum profile in step (2) in a vacuum drying oven, and dry it f...

Embodiment 2

[0070] Embodiment 2 A kind of aluminum profile surface treatment process

[0071] Described technique comprises the following steps:

[0072] (1) Surface pretreatment of aluminum profiles

[0073] The pretreatment is to clean the aluminum profile, remove the dust on the surface, and obtain the pretreated aluminum profile;

[0074] (2) Soaking treatment of aluminum profiles

[0075] The soaking is to put the pretreated aluminum profile in the step (1) into the soaking solution for 15 minutes to soak for 15 minutes to obtain the soaked aluminum profile;

[0076] The soaking solution is a mixture of sodium bicarbonate solution with a mass fraction of 8% and a sodium hydroxide solution with a mass fraction of 5%, and the volume ratio of the two is sodium bicarbonate solution: potassium hydroxide solution is 2:4;

[0077] (3) Drying treatment of aluminum profiles

[0078] The drying process is to place the soaked aluminum profile in step (2) in a vacuum drying oven, and dry it ...

Embodiment 3

[0087] Embodiment 3 A kind of polyurethane wood grain powder coating for aluminum profiles

[0088] Include the following components in parts by weight: allnex 2870-05 parts, allnex 2818-02 parts, allnex 2876-01 parts, curing agent 5 parts, precipitated barium sulfate 6 parts, leveling agent 0.5 parts, antioxidant 0.5 parts, 0.2 parts of stannous octoate and stannous oxalate with a mass ratio of 1:1, and 5 parts of carbon black.

[0089] The curing temperature of the polyurethane wood grain powder coating for aluminum profiles is 155° C., and the curing time is 14 minutes.

[0090] The polyurethane wood-grain powder coating for aluminum profiles is sprayed by high-voltage static electricity, the high-voltage static electricity is 70KV high-voltage static electricity, and the thickness of the sprayed film is 80 microns.

[0091] The preparation method of the polyurethane wood grain powder coating for aluminum profiles specifically comprises the following steps:

[0092] (1) F...

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Abstract

The invention discloses an aluminum profile surface treatment process and relates to the technical field of aluminum profile surface treatment. The surface treatment process disclosed by the present invention has the following steps: (1) aluminum profile surface pretreatment; (2) aluminum profile soaking treatment; (3) aluminum profile drying treatment; (4) aluminum profile passivation treatment; (5) aluminum profile Spraying treatment; (6) Aluminum profile curing treatment. The passivation solution used in the passivation treatment step of the present invention is water-based polyurethane, cerium nitrate, sodium fluoride and sodium dichromate with a weight fraction ratio of 15:3:2:2, and the finish paint used in the spray treatment step Polyurethane wood grain powder coating for aluminum profile; the present invention sprays the powder coating disclosed in the present invention after passivating the aluminum profile, which can effectively prevent the coating from falling off, and the powder coating disclosed in the present invention has better adhesion to the aluminum profile , improve the corrosion resistance of aluminum profiles, and increase the service life of aluminum profiles.

Description

technical field [0001] The invention relates to the technical field of aluminum profile surface treatment, in particular to an aluminum profile surface treatment process. Background technique [0002] With the continuous progress and development of society, people have undergone great changes in material life and spiritual life. People's pursuit of spiritual life is getting higher and higher, especially the requirements for living and living environment are getting higher and higher. The current building and decoration field usually consumes a lot of wood, which leads to the deterioration of the environment on which people live. With the enhancement of global environmental awareness, people also start to pay attention to environmental protection. Therefore, in order to meet the needs of rapid development, some new materials have emerged. [0003] Aluminum profiles are currently widely used materials in construction, decoration, storage and other fields. They are widely acce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/06C09D5/03C09D5/08C09D7/61C08G18/42C23C22/37
Inventor 杨庆伟滕学芳
Owner ZHEJIANG CHAOLANG ADVANCED MATERIALS
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