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Powder coating with effect of color changing along with angle and preparation method thereof

A technology of powder coating and powder coating, which is applied in the field of powder coating with different color effects depending on the visual angle and its preparation, which can solve the problems of coating separation, pigment accumulation, powder spit, etc.

Active Publication Date: 2013-06-05
NINGBO SOUTH SEA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, it has been found in actual research that if the existing powder coatings are colored with color-dependent pigments, many problems will arise
Since the grinding method is generally used in the preparation process of powder coatings, the structure of most heterochromatic pigments is destroyed, which not only leads to a decrease in gloss effect, but also may lead to loss of the effect of heterochromatic pigments
It is therefore currently not possible to mix effect pigments into the raw materials for the preparation of powder coatings in the same way as other pigments and then grind the mixture after extrusion
In order to prevent the color-shifting pigment from being destroyed during grinding, it is possible to dry-mix the powder coating into it after grinding, but it is found in practice that this will lead to defects of pigment aggregation or lack on the surface of the decorated object. The reason is that the different electrification behaviors of the powder coating particles and the color-dependent pigment particles during the dry mixing process lead to the separation of the paint during spraying
And when the content of the angle-flop pigment is high, there will also be problems of pigment accumulation, powder spit and clogging of the muzzle, which will bring many difficulties to practical application

Method used

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  • Powder coating with effect of color changing along with angle and preparation method thereof
  • Powder coating with effect of color changing along with angle and preparation method thereof
  • Powder coating with effect of color changing along with angle and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0060] The powder coating with different color effect according to the angle described in this embodiment is obtained by dry mixing the epoxy resin particle system and the fluorocarbon resin particle system with a ratio of parts by weight of 1:1.

[0061] Described epoxy resin particle system is made up of the component of following parts by weight:

[0062] Bisphenol A type epoxy resin E-12 and dicyandiamide curing agent DYHARD A total of 75 copies;

[0063] 18 parts of mica pigments coated with iron oxide and titanium dioxide with a particle size of 50-200 μm;

[0064] 15.5 parts of pigments and fillers; including pigments and fillers, the fillers are selected from barium sulfate such as W-44HB, and the pigments are selected from titanium dioxide CR826, wherein the pigments and fillers can be added according to the needs of those skilled in the art. The addition ratio of the pigment and the filler described in the example is 1:1;

[0065] 1 part of auxiliary agent A, sai...

Embodiment 2

[0079] The powder coating with an angle-dependent color difference described in this embodiment is obtained by dry mixing an epoxy resin particle system and a fluorocarbon resin particle system at a ratio of parts by weight of 7:3.

[0080] Described epoxy resin particle system is made up of the component of following parts by weight:

[0081] A total of 30 parts of bisphenol A epoxy resin NPES-903 and substituted dicyandiamide curing agent (CASAMID710 from THOMAS SWAN);

[0082] Coated SiO 2 40 slices;

[0083] 10 parts of pigments and fillers; including pigments and fillers, the fillers are selected from barium sulfate such as W-44HB, and the pigments are selected from titanium dioxide CR826, wherein the pigments and fillers can be added according to the needs of those skilled in the art. The addition ratio of the pigment and the filler described in the example is 3:1;

[0084] 1.8 parts of auxiliary agent A, said auxiliary agent A includes corner coverage modifier 0.5 ...

Embodiment 3

[0097] The powder coating with an angle-dependent color difference described in this embodiment is obtained by dry mixing an epoxy resin particle system and a fluorocarbon resin particle system at a ratio of parts by weight of 3:7.

[0098] Described epoxy resin particle system is made up of the component of following parts by weight:

[0099] A total of 90 parts of bisphenol A epoxy resin (NPES-903) and hydrazide (ADH);

[0100] 0.2 parts of aluminum flakes with a particle size of 100-150 μm;

[0101] 50 parts of pigments and fillers, including pigments and fillers, the fillers are selected from aluminum hydroxide such as The pigment is selected from carbon black 330R, wherein the pigment and filler can be added and set according to the needs of those skilled in the art for the product, and the addition ratio of the pigment and the filler in this embodiment is 1:2;

[0102] 0.2 part of auxiliary agent A, said auxiliary agent A includes 0.1 part of curing accelerator BASF2-...

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Abstract

The invention belongs to the field of powder coating and particularly relates to power coating with an effect of color changing along with an angle. The powder coating with the effect of color changing along with the angle comprises epoxy resin, an epoxy resin particle system corresponding to a matched curing agent A and color changing pigments and a fluorocarbon resin particle system with fluorocarbon resin and a matched curing agent B. The parts by weight ratio of the epoxy resin particle system and the fluorocarbon resin particle system is 7-3:3-7. According to the powder coating, the color changing pigments are adhered in an epoxy resin layer successfully through bonding technology. In the process of curing, the color changing pigments are sunk into the coating bottom instead of floating to the surface of the coating along with the epoxy resin. A transparent fluorocarbon resin layer floating to the upper layer has the function of protecting the color changing pigments so that the color changing pigments are antioxidative. A structure of the color changing pigments is not damaged in the whole process and the color changing effect is thoroughly played.

Description

technical field [0001] The invention belongs to the field of powder coatings, in particular to a powder coating with a different color effect depending on the visual angle and a preparation method thereof. Background technique [0002] The angle-dependent pigment refers to the pigment whose color and gloss change with the change of the viewing angle under the irradiation of light, or the pigment whose color changes with the change of the light source's irradiation angle without changing the viewing angle. . This kind of pigment is designed according to the requirements of the film structure by using the interference or diffraction effect between reflected light. Reflection, interference and absorption occur in the multilayer film structure of the pigment under the irradiation of visible light, so that the surface color of the pigment changes with the viewing angle. changes due to changes. The color-changing effect of this color-dependent pigment has a lot to do with the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/02C09D163/04C09D127/18C09D127/12C09D5/03C09D5/29C09D7/12
Inventor 张云伟
Owner NINGBO SOUTH SEA CHEM
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