Preparation method for flake-like aluminium powder pigment

Abstract

The invention discloses a preparation method for a flake-like aluminium powder pigment, and the method comprises the following steps: putting 1-1.5 tons of steel balls of which the diameter is 0.8-1.5mm, 1-10mu m of spherical aluminium powder, 150#or 200# solvent oil and accessory ingredients into a ball mill at a certain ratio; introducing nitrogen for protection; after the ball mill carries outball milling at a higher speed for 5-7 hours, slowing the revolving speed to carry out ball milling for 1.5-3 hours; after ball milling is finished, adding 80-120kg of 150# or 200# solvent oil for diluting; pressing out the diluted aluminium slurry by virtue of an air pump; screening and grading by virtue of a vibrating screen; carrying out filter pressing by a use of a plate and frame type filter press; separating solid and liquid to obtain a filter cake of which the solid content is 70-80%; adding a 150#or 200# diluted phenolic antioxidant; kneading in a kneader for 40-60 minutes; and packaging. By utilizing the preparation method disclosed by the invention, silver dollar type flake-like metal particles with even particle diameter can be obtained, the product performance is improved, the coating effect of the aluminium particle is improved, the phenomenon of silver drop can be solved, the surface of the aluminium particle is smooth and flat, and the welding, burr and the like of thealuminium particle can be reduced.

Description

technical field [0001] The invention relates to the field of chemical production, in particular to a preparation method of flake aluminum powder pigment. Background technique [0002] Flake aluminum powder is one of the very important metallic pigments. Due to its good metallic luster effect and color flop effect, it is widely used in construction, automobile, paint, chemical and ink industries. Uniformity, weather resistance and fastness all play a very important role. [0003] The aluminum powder particles used in pigments are scaly, and it is precisely because of this scaly particle state that aluminum powder has the shielding function of metallic color. The industrial production of metal aluminum powder has existed for a long time. The production methods are divided into dry method and wet method. Most modern aluminum powder pigments adopt wet method of production. The wet production process is to add the raw material aluminum powder, solvent oil, and ball milling addi...

AI Technical Summary

Problems solved by technology

However, the flake aluminum paste produced by this method has common problems: wide particle size distribution of aluminum powder; poor shape regularity; poor surface smoothness; poor adhesion of aluminum powder; short storage period of products, etc.

However, when such a liner is used to grind flake powder, there are such disadvantages: 1. There is a dead angle between the liner and the inner wall of the ball mill; Throwing and smashing the material, many flake particles formed will be smashed, and the silver circle structure cannot be formed