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Powder coating material with metal effect, and preparation method thereof

A technology for powder coating, metallic effect

Active Publication Date: 2021-01-15
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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  • Powder coating material with metal effect, and preparation method thereof
  • Powder coating material with metal effect, and preparation method thereof

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Experimental program
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Effect test

preparation example Construction

[0034]The present invention provides a preparation method of powder coating with metallic effect, including:

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

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

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

Embodiment 1

[0081](1) The raw materials of the foundation powder are mixed uniformly in advance, and extruded and crushed to obtain a foundation powder with a particle size of 20-45μm; among them, the raw materials of the foundation powder include: 65wt% resin, 5wt% curing agent, 1.3wt% auxiliary The resin used is Crycoat 2441-2 of Alchemy Company, the curing agent is Nissan TEPIC-G curing agent, and the auxiliary agent is 1% by weight leveling agent (Resiflow PV88 from Estron), and the resin is 15.2wt% pigment and 13.5wt% filler; 0.3wt% benzoin, 15wt% titanium dioxide and 0.2wt% carbon black as the pigment, barium sulfate as the filler;

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

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

Embodiment 2

[0086](1) The raw materials of the base powder are mixed uniformly in advance, and extruded and crushed to obtain a base powder of 20-55μm; among them, 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 is 1wt% leveling agent (Estron Resiflow PV88) and 0.3wt% Benzoin, the pigment is 15wt% titanium dioxide and 0.2wt% carbon black, and the filler is barium sulfate;

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

[0088](3) Put the mixed powder coating containing metal powder into an extruder for extruding. The slenderness ratio of the screw of the extruder is 3:1, and 50% of the screw blocks are feed screw blocks. % Of snails are mixed s...

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Abstract

The invention discloses a powder coating material with a metal effect, and a preparation method of the powder coating material. The preparation method comprises the following steps: (1) premixing rawmaterials uniformly, extruding and crushing to obtain base powder; (2) adding metal powder according to a proportion, and uniformly mixing the metal powder and base powder, wherein the adding amount of the metal powder is 4-30 wt%; (3) carrying out melting treatment on the mixed powder coating material containing the metal powder through an extruder, wherein the melting treatment temperature is higher than the melting point or softening point of the base powder and lower than the curing temperature of the base powder; and (4) cooling and crushing the molten powder coating material again to obtain the powder coating material with a metal effect. By the adoption of the method, the content of the added metal powder is large, the flicker degree of metal can be guaranteed, it can also be guaranteed that the consistency of spraying colors is good, and stability is high.

Description

Technical field[0001]The invention relates to the technical field of powder coatings, in particular to a powder coating with a metallic effect and a preparation method thereof.Background technique[0002]Powder coating is a new type of solvent-free 100% solid coating, without VOC, and is an environmentally friendly coating. The powder coating is prepared by mixing resin, pigments, fillers, curing agents and other additives in a certain proportion, and then through processes such as hot extrusion, crushing and sieving. They are stable in storage at room temperature. After electrostatic spraying, friction spraying or fluidized bed dip coating, they are heated and baked to melt and solidify to form a smooth and bright permanent coating film to achieve the purpose of decoration or corrosion prevention. 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...

Claims

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Application Information

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Patent Type & Authority Applications(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