Copper powder pigment and manufacturing method thereof by dry milling

Abstract

The invention provides a copper powder pigment which is prepared by mixing the following components in parts by weight: 95-98% of copper powder, 1.5-4% of stearic acid, 0.4-0.8% of coupling agent and 0.1-0.2% of dispersing agent. The manufacturing method of the copper powder pigment by dry milling comprises the following steps: ball milling, graded screening, synthesis of primary finished product, and synthesis of secondary finished product. The high-polymer coupling agent with coordination group is used as a protective agent, and the stearic acid has the effect of assisting milling, thereby integrally changing the milling mode; the graded uniform-speed impact-free grinding, three-stage screening and two-stage discharging are utilized to enhance the radius-thickness ratio and particle uniformity of the product; and the dual oxidation-resistant configuration effectively solves the problem of high oxidation tendency of the copper powder surface in the working process, thereby obtaining the flake copper powder pigment with strong oxidation resistance and enduring, bright and adjustable color.

Description

technical field [0001] The invention relates to the technical field of manufacturing solid metal powder pigments, in particular to a copper powder pigment and a dry grinding manufacturing method thereof. Background technique [0002] Metallic pigments are a kind of pigments processed by metal powders and metal oxides by appropriate methods. They have metallic luster and are widely used in the paint industry as decorative paints. The main varieties are: aluminum powder, copper powder, zinc powder, lead powder, titanium powder and stainless steel powder; among them, the powder with golden to bronze luster is made of metal copper or its alloy of zinc and tin. The zinc powder provided by conventional copper powder manufacturers contains different particle sizes, and the mixed zinc powder is not further sieved, so that it is not conducive to the user to selectively add according to the application during use, that is, it cannot meet the gloss of the coating. , flat and smooth ef...

AI Technical Summary

Problems solved by technology

The zinc powder provided by conventional copper powder manufacturers contains different particle sizes, and the mixed zinc powder is not further sieved, so that it is not conducive to the user to selectively add according to the application during use, that is, it cannot meet the gloss of the coating. , flat and smooth effect, the current screening production equipment has yet to solve the production technical problems related to the anti-oxidation of metal powder particles in the industry, the control of the particle size distribution of the fine powder, the control and transformation of the microscopic shape of the powder, so it is necessary to provide a formula, Manufacturing methods from process parameters to proprietary production lines to meet the evolving needs of the industry