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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: 2021-05-07
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
  • A kind of powder coating with metallic effect and preparation method thereof

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Experimental program
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Effect test

preparation example Construction

[0034] The invention provides a method for preparing a powder coating with a metallic effect, comprising:

[0035] (1) Mix the raw materials of the base powder evenly in advance, and crush them by extrusion to obtain the base powder. The average particle size of the base powder is controlled at 20-55 μm;

[0036] The raw materials of the primer include: 40-90wt% resin, 5-50wt% curing agent, 0.1-10wt% auxiliary agent, 0-20wt% pigment and 0-20wt% filler. Preferably, the raw materials of the primer include: 50-70wt% resin, 5-30wt% curing agent, 0.1-10wt% additive, 0-20wt% pigment and 0-15wt% filler.

[0037] Among them, the melt viscosity of the resin at 160°C is 1500-8000 mPa·S to ensure that the film-forming material in the coating can fully infiltrate with the metal powder, otherwise there will be poor leveling and insufficient surface smoothness. . Preferably, the resin has a melt viscosity of 1500-6000 mPa·S at 160°C. More preferably, the resin has a melt viscosity of 150...

Embodiment 1

[0081] (1) Mix the raw materials of the base powder in advance, and crush them by 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, 15.2wt% pigment and 13.5wt% filler; the resin is Crycoat 2441-2 from Allnex, the curing agent is Nissan TEPIC-G curing agent, and the auxiliary agent is 1wt% leveling agent (Estron Resiflow PV88) and 0.3wt% benzoin, 15wt% titanium dioxide and 0.2wt% carbon black as pigment, and barium sulfate as filler;

[0082] (2) Add metal powder in proportion, and mix the metal powder and the base powder evenly, wherein, the added amount of the metal powder is 6wt%, and its average particle size is 40-50 μm;

[0083] (3) Put the mixed powder coating containing metal powder into the extruder for extrusion. The slenderness ratio of the screw of the extruder is 5:1, and 50% of the screw blocks are feeding screw blocks. % of the screw b...

Embodiment 2

[0086] (1) Mix the raw materials of the base powder 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, 15.2 wt% pigment and 13.5wt% filler; the resin is Crycoat 2441-2 from Allnex, the curing agent is Nissan TEPIC-G curing agent, and the auxiliary agent is 1wt% leveling agent (Estron 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;

[0087] (2) Add metal powder according to the proportion, and mix the metal powder and the base powder evenly, wherein, the added amount of the metal powder is 10wt%, and its average particle size is 35-60 μm;

[0088] (3) Put the mixed powder coating containing metal powder into the extruder to extrude. The slenderness ratio of the screw of the extruder is 3:1, 50% of the screw blocks are feeding screw blocks, 50 ...

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Abstract

The invention discloses a powder coating with metallic effect and a preparation method thereof, which includes: (1) mixing the raw materials evenly in advance, and extruding and crushing them to obtain base powder; (2) adding metal powder according to the proportion, and making the The metal powder and base powder are evenly mixed, wherein the addition amount of the metal powder is 4-30wt%; (3) The mixed powder coating containing metal powder is melted through an extruder, and the melted The temperature is greater than the melting point or softening point of the base powder, but lower than the solidification temperature of the base powder; (4) The melted powder coating is cooled and pulverized again to obtain a powder coating with a metallic effect. Using the present invention, the metal powder content added is large, which can not only ensure the scintillation of the metal, but also ensure good consistency and high stability of the spray 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 it is growing at a rate ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/03C09D167/00C09D7/61B02C21/00B29B7/56
CPCB02C21/00B29B7/56C08K2003/0812C08K2003/2241C08K2003/3045C09D5/032C09D5/035C09D167/00C08K13/02C08K3/08C08K3/013C08K3/22C08K3/04C08K3/30
Inventor 伍明
Owner 艾勒可新材料(佛山)有限公司