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A kind of powder coating with metallic effect and preparation method thereof

A powder coating and metal effect technology, applied in powder coatings, polyester coatings, coatings, etc., can solve the problems of broken aluminum powder, weather resistance and chemical resistance, etc., to achieve good surface smoothness and excellent The effect of simple performance and preparation method

Active Publication Date: 2022-04-05
艾勒可新材料(佛山)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the patented method, the aluminum powder will be broken and the aluminum powder will be exposed directly, so the weather resistance and chemical resistance will be greatly reduced

Method used

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  • A kind of powder coating with metallic effect and preparation method thereof

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preparation example Construction

[0030] The invention provides a method for preparing a powder coating with a metallic effect, comprising:

[0031] (1) Pre-mix the raw materials evenly, and extrude and pulverize to obtain the base powder, the average particle size of the base powder is controlled at 20-55 μm;

[0032] The raw materials of the primer include: 40-90wt% resin, 5-50wt% curing agent, 0.1-10wt% auxiliary agent, 0-20wt% pigment, 0-20wt% filler. Preferably, the raw materials of the primer include: 50-70wt% resin, 5-30wt% curing agent, 0.1-10wt% auxiliary agent, 0-20wt% pigment and 0-15wt% filler.

[0033] Wherein, the melt viscosity of the resin at 160° C. is 1500-8000 cps, which can ensure that the film-forming substance in the paint can fully infiltrate with the metal powder, and ensure leveling and surface smoothness. If the melt viscosity of the resin is outside the above range, when the powder coating melts, the viscosity is too high or it is not easy to melt, and when the powder coating passes...

Embodiment 1

[0069] (1) Mix the raw materials in advance, and crush them through extrusion to obtain a base powder with a particle size of 20-45 μm; wherein, the raw materials of the base powder include: 65wt% resin, 5wt% curing agent, 1.3wt% auxiliary agent, 15.2 wt% pigment and 13.5wt% filler; the resin is selected from Allnex Corporation Crycoat 2441-2, the curing agent is selected from Japan Nissan TEPIC-G curing agent, and the auxiliary agent is selected from 1wt% leveling agent (Estron Corporation Resiflow PV88) and 0.3wt% Benzoin, pigment selects 15wt% titanium dioxide and 0.2wt% carbon black for use, and filler selects barium sulfate for use;

[0070] (2) adding metal powder in proportion, and mixing the metal powder and the base powder evenly, wherein the metal powder is added in an amount of 6 wt%, and its average particle size is 40-50 μm;

[0071] (3) Melting the mixed powder coating containing metal powder through a two-roll kneader, the temperature of the two-roll kneader is ...

Embodiment 2

[0074] (1) Mix the raw materials evenly in advance, and crush them by extrusion to obtain a base powder of 20-55 μm; wherein, the raw materials of the base powder include: 65wt% resin, 5wt% curing agent, 1.3wt% auxiliary agent, 15.2wt% pigment And 13.5wt% filler; Described resin selects Crycoat 2441-2 of Allnex Company for use, curing agent selects Japanese Nissan TEPIC-G curing agent for use, auxiliary agent selects 1wt% leveling agent (Estron Company Resiflow PV88) and 0.3wt% benzoin for use, pigment Select 15wt% titanium dioxide and 0.2wt% carbon black, and use barium sulfate as filler;

[0075] (2) adding metal powder in proportion, and mixing the metal powder and the base powder evenly, wherein the metal powder is added in an amount of 10wt%, and its average particle size is 35-60 μm;

[0076] (3) Melting the mixed powder coating containing metal powder through a two-roll kneader, the temperature of the two-roll kneader is set to 150°C, and the gap between the two rolls i...

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Abstract

The invention discloses a method for preparing a powder coating with metal effect, which comprises: (1) pre-mixing the raw materials uniformly, extruding and pulverizing to obtain a base powder; (2) adding metal powder in proportion, and making the The metal powder is mixed evenly with the base powder, wherein the addition of the metal powder is 4-30wt%; (3) the mixed powder coating containing the metal powder is melt-processed by a kneader, and the kneader The temperature is set at 130°C-170°C, and the temperature of the melting treatment is higher than the melting point or softening point of the primer, but lower than the solidification temperature of the primer; (4) the powder coating after the melting treatment is again Cool and pulverize to obtain a powder coating with a metallic effect. Correspondingly, the present invention also provides a powder coating with metallic effect prepared by the above method. By adopting the invention, the added metal powder has a large content, which can not only ensure the scintillation of the metal, but also ensure good consistency and high stability of the sprayed color.

Description

technical field [0001] The invention relates to the technical field of powder coatings, in particular to a powder coating with metallic effects and a preparation method thereof. Background technique [0002] Powder coating is a new type of solvent-free 100% solid coating, does not contain VOC, and is an environmentally friendly coating. Powder coatings are prepared by mixing resins, pigments, fillers, curing agents and other additives in a certain proportion, and then through hot extrusion, crushing and sieving. They are stable in storage at room temperature. After electrostatic spraying, friction spraying or fluidized bed dipping, they are heated and baked to melt and solidify to form a flat and bright permanent coating film to achieve the purpose of decoration or anti-corrosion. Powder coatings have developed very rapidly in the past 40 years. At present, the annual sales volume of powder coatings in the Chinese market is about 1 million tons, and the annual growth rate i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D167/00C09D5/03C09D7/61
CPCC09D167/00C09D5/033C09D5/032C09D5/035C08K2003/2241C08K2003/3045C08K3/22C08K3/04C08K3/30C08K3/08
Inventor 伍明
Owner 艾勒可新材料(佛山)有限公司