Preparation method of fine-flash type aluminum pigment and aluminum pigment prepared by using same

A technology of aluminum pigment and fine flash, which is applied in the field of metallic pigments, can solve the problems of insufficient whiteness and brightness of fine flash aluminum pigment, and achieve the effect of uniform thickness and simple process

Active Publication Date: 2012-01-25
长沙族兴新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a preparation method of fine flash type aluminum pigment and the aluminum pigment prepared therefrom, so as to solve the problem of insufficient shape whiteness and brightness of fine flash type aluminum pigment

Method used

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  • Preparation method of fine-flash type aluminum pigment and aluminum pigment prepared by using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Take D 50 40kg of atomized spherical aluminum powder with a diameter of 5μm, 70kg of 200# solvent oil, 1.8kg of linoleic acid, and 2.1kg of stearic acid were added to a horizontal ball mill, and steel balls with a diameter of 1.5mm were used as grinding media. Grind at 35 rpm for 42 hours and control the temperature of the outer wall of the ball mill to not exceed 60°C.

[0036] (2) Add 1 kg of lauric acid, grind for another 2 hours and stop.

[0037] (3) Afterwards, a filter cake with a solid content of 85±2% is obtained after discharging, screening, and pressure filtration, and the organic solvent obtained by pressure filtration is recycled. Then put it into a kneader, add 8.2kg of 150# solvent oil to dilute to a solid content of 68-72%, and knead to obtain a fine flash aluminum paste 1.

Embodiment 2

[0039] (1) Take D 50 37kg of atomized spherical aluminum powder of 7μm, 75kg of 200# solvent oil, 1.5kg of linoleic acid, and 1.4kg of stearic acid were added to a horizontal ball mill, and steel balls with a diameter of 2mm were used as grinding media at 35 rpm. The ball milling time is 36 hours at 10 minutes, and the temperature of the outer wall of the ball mill is controlled below 60°C.

[0040] (2) Add 1.2kg of lauric acid, grind for 2 hours and stop the machine.

[0041] (3) After discharging, sieving, and pressing to obtain a filter cake with a solid content of 83-87%, place it in a kneader, add 7.8kg of 150# solvent oil to dilute to a solid content of 68-72%, and knead Get fine flash type aluminum paste 2.

Embodiment 3

[0043] (1) Take D 50 46kg of atomized spherical aluminum powder of 10μm, 60kg of 200# solvent oil, 2.1kg of linoleic acid, and 2.4kg of stearic acid were added to a horizontal ball mill, and steel balls with a diameter of 3mm were used as grinding media at 35 rpm. The ball milling time is 44 hours at 10 minutes, and the temperature of the outer wall of the ball mill is controlled below 60°C.

[0044] (2) Add 1.2kg of lauric acid, grind for 1 hour and stop the machine.

[0045] (3) After discharging, sieving, and pressing to obtain a filter cake with a solid content of 83-87%, place it in a kneader, add 7.8kg of 150# solvent oil to dilute to a solid content of 68-72%, and knead Get fine flash aluminum paste 3.

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Abstract

The invention provides a preparation method of fine-flash type aluminum pigment and the aluminum pigment prepared by using the same. The preparation method comprises the following steps: adding an organic solvent, a lubricating agent and aluminum powder with D50 of 3-11 mu m, and carrying out ball milling in a ball mill the rotation speed of which is 20-40 turns/min; adding lauric acid 1-2 hours before ball milling stops; and screening, filtering and then diluting so as to prepare the aluminum pigment with the D50 less than 25 mu m, wherein a grinding medium used in the process of ball milling is a steel ball with a diameter of 0.5-3 mm, the addition amount of the aluminum powder is 35-45 weight parts, the addition amount of the organic solvent is 65-75 weight parts, and the addition amount of lauric acid is 1.5-2 weight parts. By using the method, the shape regularity of the prepared aluminum pigment can be improved so as to improve the whiteness and brightness of the aluminum pigment, L15 of the aluminum pigment can reach 102, and L45 of the aluminum pigment can reach 62; and the thickness of an aluminum sheet in the aluminum pigment reaches 0.5-1.0mu m, and the aluminum sheet has leveling surface, regular shape and even thickness, and process is simple and convenient.

Description

technical field [0001] The technical field of metal pigments that the present invention relates to, in particular, relates to a method for preparing fine flash aluminum pigments, and in particular, also relates to an aluminum pigment prepared by this method. Background technique [0002] Flash aluminum pigments are divided into coarse flash aluminum paste and fine flash aluminum paste according to the particle size of the aluminum flakes in the prepared aluminum paste. Among them, the fine flash aluminum paste refers to D 50 (The particle size of 50wt% of the particles in the substance)<25μm aluminum paste. This kind of aluminum paste has strong covering power and metallic luster, and the coating color is bright white and soft and delicate. The performance of aluminum pigments depends on the particle size, particle size distribution, thickness, surface and edge texture of aluminum flakes in aluminum pigments. [0003] In the prior art, fine flash aluminum pigments are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/64C09C3/04C09C3/08
Inventor 周明
Owner 长沙族兴新材料股份有限公司
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