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Surface modification preparation method of flaky metal powder.

A flake metal and surface modification technology, applied in the coating and other directions, can solve the problems of complex process steps and inconvenient industrial production, and achieve the simplification of production process steps, improve production efficiency, improve stability and resistance to storage and transportation. Effect

Active Publication Date: 2014-10-01
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned existing modified metal powder surface modification method has the problems of multiple treatments, complex process steps, and inconvenient industrial production.

Method used

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Effect test

preparation example Construction

[0009] An embodiment of the present invention provides a method for preparing a surface modification of a flake metal powder. During the process of preparing the flake metal powder, the surface modification and coating process can be completed. The method includes the following steps:

[0010] Spherical metal powder, metal chelating agent, surface treatment agent, solvent oil and grinding media are added to the ball mill according to the proportion, and ball milling is carried out at a ball milling speed of 5-40Hz for 5-18 hours, and then the slurry after ball milling is taken out and solidified. Liquid separation to obtain paste-like metal powder, further drying and grading treatment of the paste-like metal powder, the grading treatment is sieving and sieving, that is, the modified flake metal powder with double-layer coating of metal chelating agent and surface treatment agent is obtained . Among them, the surface treatment agent is preferably fatty acid or fatty acid salt, ...

Embodiment 1

[0019] This embodiment provides a method for preparing a surface modification of a flake metal powder, specifically a method for preparing a flake zinc powder pigment, comprising the following steps:

[0020] Add 10kg of spherical zinc powder prepared by distillation and condensation, 30L120# solvent oil, 150kg of zirconia balls of φ=5mm, 0.15g of sodium ethylenediamine di-o-phenylacetate and 0.4kg of stearic acid into the ball mill, and grind at a ball milling rate of 25Hz After grinding for 8 to 12 hours, separate the zinc powder and solvent oil from solid to liquid. The separated paste zinc powder is dried and passed through a 325-mesh sieve. Modified flaky zinc powder pigment.

Embodiment 2

[0022] This embodiment provides a method for preparing a surface modification of a flaky metal pigment, specifically a method for preparing a flaky zinc powder pigment, comprising the following steps:

[0023] Put 10kg of spherical zinc powder prepared by distillation and condensation, 30L120# solvent oil, 150kg of zirconia balls of φ=5mm, 0.1Kg of phytate and 0.4kg of stearic acid amide into the ball mill, and grind at a ball milling rate of 25Hz for 8~ After 12 hours, the zinc powder and solvent oil are separated into solid and liquid, the separated pasty zinc powder is dried and passed through a 325 mesh sieve, and the under-sieve is collected as modified flakes coated with metal chelating agent and fatty acid salt. Zinc powder pigment.

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Abstract

The invention discloses a surface modification preparation method of flaky metal powder and belongs to the technical field of metal powder material preparation. The method comprises the steps that spherical metal powder, a metal chelating agent, a surface treating agent, solvent oil and a grinding medium are placed in a ball grinding mill, ball grinding is conducted for 5-18 hours at the ball-milling rotation speed of 5-40 Hz, slurry obtained after ball milling is taken out, soil-liquid separation is conducted, so that paste metal powder is obtained, the paste metal powder is dried and graded, and then the modified flaky metal powder coated with the metal chelating agent and the surface treating agent is obtained. According to the surface modification preparation method, flaking and surface modification of the metal powder are completed at the same time, the process steps are simple, the efficiency is high, the product stability is high, and the surface modification preparation method is suitable for industrial production.

Description

technical field [0001] The invention relates to the field of metal powder preparation, in particular to a surface modification preparation method of flake metal powder. Background technique [0002] Flake metallic pigments are a type of tiny flake-like metal powders with a large diameter-to-thickness ratio. Currently, flake zinc powder, flake aluminum powder, flake stainless steel powder, and copper-gold powder have been commercially applied. When these flake-like pigments When the metal powder is mixed into the film-forming material to form a film, the metal scales are parallel to the surface of the substrate, arranged in multiple layers, covering each other, forming layer-by-layer barriers, which can effectively prevent the penetration of harmful gases or liquids from the outside in the coating, and protect The metal substrate is not corroded; the flake metal pigment is a micro-flaky structure with a smooth surface, which can produce a very good metallic luster when formin...

Claims

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Application Information

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IPC IPC(8): B22F1/02
Inventor 焦志伟崔岩刘峰斌王大伟屈敏
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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