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Polyurethane (PU) paint for decorating magnesium alloy surface

A surface decoration, polyurethane technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of complex process, high energy consumption, wear resistance, weather resistance and insufficient appearance decoration, achieve high metallic luster, avoid waste, The effect of multiple superiority

Inactive Publication Date: 2010-09-15
惠州市嘉淇涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on the anti-corrosion coating surface treatment of magnesium alloys has been reported in domestic literature. Among them, the Chinese patent CN1486795 discloses a three-layer decorative and protective coating process including powder coating, acrylic resin coloring layer and ultraviolet curing topcoat. The process is relatively complex, energy consumption is high, and it is difficult to adapt to the needs of automated production; Chinese patents CN101173144, CN101294011 involve a single-layer UV-cured protective coating and Chinese patent CN101376790 introduces a hydroxyl-containing saturated polyester resin, amino resin and Primer coatings composed of epoxy resins. Although these coating schemes have a certain protective effect on the surface of magnesium alloys, they are still insufficient in terms of wear resistance, weather resistance and appearance decoration.

Method used

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  • Polyurethane (PU) paint for decorating magnesium alloy surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The weight percent of PU primer: acrylic polyol MS2200 35%, hydroxyl acrylic resin TB60018P 10%, nitrocellulose (1 / 2 second) 4%, wrapped aluminum silver paste TR3100 (Japan Asahi Kasei) 6%, closed curing agent MF -K60X (Japan Asahi Kasei) 8%, leveling agent BYK-306 (German BYK) 0.99%, anti-settling agent REOLOSIL (Japan TOKUYAMA) 3%, drier organotin 0.01%, mixed solvent 33%.

[0017] Accurately weigh the above components and add them to the dispersing vessel one by one, control the dispersing temperature (less than 60°C), stir evenly at a medium speed (about 2 hours), filter and pack.

[0018] The weight percentage of PU topcoat: acrylic polyol MS250025%, hydroxyl acrylic resin TP6028P 8%, polyester polyol TBK70028P 15%, 1,4-butanediol 3%, closed curing agent MF-K60X (Japan Asahi Kasei) 15 %, transparent red pigment 3%, leveling agent BYK-306 (Germany BYK) 1%, anti-salt spray additive KP392 (Japan Shin-Etsu) 0.99%, drier organotin 0.01%, mixed solvent 29%. The mixing m...

Embodiment 2

[0020] The weight percent of PU primer: acrylic polyol A-80138%, hydroxyl acrylic resin TB60018P 8%, nitrocellulose (1 / 2 second) 4%, wrapped aluminum silver paste FZH-390 (Japan Toyo) 6%, closed type Curing agent MF-K60X (Japan Asahi Kasei) 10%, leveling agent BYK-306 (German BYK) 0.99%, anti-settling agent REOLOSIL (Japan TOKUYAMA) 3%, drier organotin 0.01%, mixed solvent 30%.

[0021] The weight percentage of PU topcoat: acrylic polyol BU-99528%, hydroxyl acrylic resin TP6028P 6%, polyester polyol DE-14013%, 1,4-butanediol 4%, closed curing agent MF-K60X (Japan Asahi Kasei) 13%, transparent blue pigment 2%, leveling agent BYK-306 (Germany BYK) 1%, anti-salt spray additive KP392 (Japan Shin-Etsu) 0.99%, drier organotin 0.01%, mixed solvent 32% . The mixing preparation method of the above-mentioned PU coating is the same as that of Example 1, and the coating properties are shown in Table 2.

Embodiment 3

[0023] The weight percent of PU primer: acrylic polyol Setalux1215 34%, hydroxyl acrylic resin TB60018P14%, nitrocellulose (1 / 2 second) 6%, wrapped aluminum silver paste FZ-C6390 (Japan Toyo) 6%, closed curing agent MF-K60X (Asahi Kasei, Japan) 10%, leveling agent BYK-330 (BYK, Germany) 1%, anti-settling agent REOLOSIL (TOKUYAMA, Japan) 2.99%, drier organotin 0.01%, mixed solvent 26%.

[0024] Weight percentage of PU topcoat: acrylic polyol BU-99514%, acrylic polyol MS2500 15%, hydroxyl acrylic resin TP6028P 6%, polyester polyol TBK70028P 12%, 1,4-butanediol 4%, closed type curing Agent MF-K60X (Japan Asahi Kasei) 15%, transparent purple pigment 2%, leveling agent BYK-333 (Germany BYK) 0.99%, anti-salt spray additive KP392 (Japan Shin-Etsu) 1%, drier organotin 0.01% , mixed solvent 30%.

[0025] The mixing preparation method of the above-mentioned PU coating is the same as that of Example 1, and the coating properties are shown in Table 2.

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Abstract

The invention belongs to the technical field of paint compositions, which solves the defects in wear resistance, weather resistance, exterior decoration and the like of the polyurethane (PU) paint for decorating the magnesium alloy surface in the prior art, and discloses a polyurethane (PU) paint for decorating a magnesium alloy surface. The polyurethane (PU) paint for decorating the magnesium alloy surface comprises PU base paint and PU surface paint, and the PU base paint comprises the following components: 25-40 parts of acrylic polyol, 8-15 parts of hydroxyl acrylic resin, 3-8 parts of nitro-cotton, 5-8 parts of coated aluminum paste, 5-15 parts of blocked curing agent, 0.5-2 parts of leveling agent, 1-3 parts of anti-settling agent, 0.01-0.05 part of drier and 25-45 parts of mixed solvent; and the PU surface paint comprises the following components: 20-30 parts of the acrylic polyol, 6-10 parts of the hydroxyl acrylic resin, 12-18 parts of polyester polyol, 1-5 parts of 1,4-butanediol, 10-20 parts of the blocked curing agent, 2-5 parts of transparent pigment, 0.5-2 parts of the leveling agent, 0.3-1 part of salt fog resistant additive, 0.01-0.05 part of the drier and 28-45 parts of the mixed solvent.

Description

technical field [0001] The invention belongs to the technical field of coating compositions. Background technique [0002] Polyurethane (PU) coatings for magnesium alloy surface decoration are mainly used for decoration and protection of magnesium alloy shells of mobile phones (hereinafter referred to as mobile phones), and their common name is magnesium alloy PU coatings. [0003] As one of the lightest engineering metal materials, magnesium alloy has the advantages of high specific strength and specific stiffness; good shock absorption, electrical conductivity and thermal conductivity; good magnetic shielding and dimensional stability, etc., and is called the most promising material in the 21st century. The green material with development potential is widely used in various fields such as aerospace, automobile manufacturing, and electronic communication. Due to the high activity of metal magnesium and the loose and porous surface of the alloy material, its corrosion resis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D175/06C09D7/12
Inventor 胡德勇胡燕捷王绍松胡德平
Owner 惠州市嘉淇涂料有限公司
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