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Aluminum alloy wheel finishing varnish capable of thick-film spraying and re-coating and preparation method thereof

A technology of overcoating varnish and aluminum alloy, applied in coatings, anti-corrosion coatings, etc., can solve the problems of one-time adhesion rework adhesion deviation, easy to appear silk rust, high painting cost, achieve ideal paint film hardness, paint film The effect of increased thickness and improved anti-corrosion performance

Active Publication Date: 2017-05-24
广东四方威凯新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are also varnishes that can be sprayed with thick films in the industry, which are mainly used in the full coating process. There are several disadvantages in the use of machining processes: First, the matching is not good, and the coating has the same adhesion as the bottom paint. Rework adhesion deviation; second, the medium resistance is poor, and the coating's water resistance, gasoline and other chemical properties cannot meet the requirements of the main engine factory; third, the anti-corrosion performance is poor, and silk rust is prone to appear at the sharp angle at the junction of machining and cutting; 4. The hardness of the paint film is low; 5. There is a varnish structure with a composite coating, which is expensive to paint and difficult to control
Under the car bright surface process, the surface varnish coating has many shortcomings. The main reason is that the anti-sag performance, anti-corrosion performance and weather resistance performance of the coating are difficult to get an effective balance.

Method used

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  • Aluminum alloy wheel finishing varnish capable of thick-film spraying and re-coating and preparation method thereof
  • Aluminum alloy wheel finishing varnish capable of thick-film spraying and re-coating and preparation method thereof
  • Aluminum alloy wheel finishing varnish capable of thick-film spraying and re-coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The thick-film spraying recoatable aluminum alloy wheel finish varnish of the present embodiment is made up of following composition:

[0027] Table 1: Thick-film spraying recoatable aluminum alloy wheel finish varnish (embodiment 1)

[0028]

[0029] The preparation method of the thick film spraying recoatable aluminum alloy wheel finish varnish of the present embodiment may further comprise the steps:

[0030] S1: Add hydroxyl acrylic resin, thermosetting acrylic resin, anti-sagging resin, amino resin, and solvent into the reaction kettle in sequence, and disperse for 20 minutes at a speed of 500 RPM;

[0031] S2: Add the adhesion promoter, silane coupling agent, leveling agent, defoamer, and light stabilizer into the reaction kettle with a rotation speed of 600 RPM while dispersing, and disperse for 20 minutes at a rotation speed of 1500 RPM;

[0032] S3: Use a 5 μm filter bag filter to filter the package.

Embodiment 2

[0034] The thick-film spraying recoatable aluminum alloy wheel finish varnish of the present embodiment is made up of following composition:

[0035] Table 2: Thick-film spraying recoatable aluminum alloy wheel finish varnish (embodiment 2)

[0036]

[0037]

[0038] The preparation method of the thick film spraying recoatable aluminum alloy wheel finish varnish of the present embodiment may further comprise the steps:

[0039] S1: Add hydroxyl acrylic resin, thermosetting acrylic resin, anti-sag resin, amino resin, and solvent into the reaction kettle in sequence, and disperse for 10 minutes at a speed of 1500 RPM;

[0040] S2: Add the adhesion promoter, silane coupling agent, leveling agent, defoamer, and light stabilizer into the reaction kettle with a rotation speed of 400 RPM while dispersing, and disperse for 30 minutes at a rotation speed of 600 RPM;

[0041] S3: Use a 10 μm filter bag filter to filter the package.

Embodiment 3

[0043] The thick-film spraying recoatable aluminum alloy wheel finish varnish of the present embodiment is made up of following composition:

[0044] Table 3: Thick-film spraying recoatable aluminum alloy wheel finish varnish (embodiment 3)

[0045]

[0046] The preparation method of the thick film spraying recoatable aluminum alloy wheel finish varnish of the present embodiment may further comprise the steps:

[0047]S1: Add hydroxyl acrylic resin, thermosetting acrylic resin, anti-sagging resin, amino resin, and solvent into the reaction kettle in sequence, and disperse for 15 minutes at a speed of 1000 RPM;

[0048] S2: Add the adhesion promoter, silane coupling agent, leveling agent, defoamer, and light stabilizer into the reaction kettle with a rotation speed of 500RPM while dispersing, and disperse for 25min at a rotation speed of 1000RPM;

[0049] S3: Use a 15 μm filter bag filter to filter the package.

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Abstract

The invention relates to an aluminum alloy wheel finishing varnish capable of thick-film spraying and re-coating, wherein the aluminum alloy wheel finishing varnish is prepared from the following components in parts by weight: 10-20 parts of hydroxyl acrylic resin, 15-30 parts of thermosetting acrylic resin, 15-35 parts of anti-sagging resin, 16-22 parts of amino resin, 1.5-3.0 parts of an adhesion promoter, 0.3-1.0 part of a silane coupling agent, 0.3-0.8 part of a leveling agent, 0.05-0.2 part of a defoaming agent, 0.5-2.0 parts of a light stabilizer, and 13-18 parts of a solvent. The invention also provides a preparation method for the aluminum alloy wheel finishing varnish capable of thick-film spraying and re-coating. The aluminum alloy wheel finishing varnish capable of thick-film spraying and re-coating has the relatively large advantages in salt fog resistance, water resistance, recoatability and the like, and has excellent re-coating adhesive force and good weather resistance.

Description

technical field [0001] The invention relates to the technical field of paint and its preparation, in particular to a thick-film sprayable and recoatable aluminum alloy wheel finish varnish and a preparation method thereof. Background technique [0002] With the rapid growth of the automobile industry, the growth rate of domestic wheel hub enterprises is relatively fast, and at the same time, it drives the development of the wheel hub paint market. The coating structure of automobile wheels mainly includes two categories: first, aluminum alloy wheels - machining - pretreatment - primer - curing - primer (or topcoat) - varnish - curing; 2. Aluminum alloy wheels - machining - pretreatment - primer - curing - primer (or topcoat) - curing - partial machining (exposing part of the aluminum alloy substrate) - pretreatment - clear coatings (including solvent-borne coatings or clear powder coatings) - curing. The clear coating on the surface of the wheel hub is mainly made of ordin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/00C09D133/14C09D161/20C09D5/08
CPCC08L2205/025C08L2205/035C09D5/08C09D133/00C08L33/14C08L61/20
Inventor 吴清双朱洪江李淑艳闵建国郑静康孙志强
Owner 广东四方威凯新材料有限公司
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