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Pearlescent magic color aluminum powder pigment and preparation method thereof

A pigment and aluminum powder technology, applied in the field of new decorative color metal pigments, can solve the problems of insignificant pearl luster effect, insignificant optical interference effect, and difficulty in large-scale production, achieve unique optical performance and decorative effect, and enhance value , the effect of simple equipment

Inactive Publication Date: 2011-11-30
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires large equipment investment, long reaction time, small batch size, high cost, and difficulty in large-scale production; Zhou Yi and others once used oxidation reaction to form a very thin and uniform oxide film on the surface of aluminum powder, and then applied it on the surface of the oxide film. Adsorbing organic pigments to make multi-colored aluminum powder (see "A Preliminary Study on Chemical Coloring of Aluminum Powder", Zhou Yi, Jia Yangang, Yinshan Academic Journal, No. 2, 1995, P 30~33)
Its colored aluminum powder is mainly developed by colored substances, and the optical interference effect is not significant; Wu Yin et al. used the organic coating method to coat polymethyl methacrylate on the surface of aluminum powder at pH = 9 and 70 ° C to obtain a golden color. Aluminum powder pigment with flashing effect (see "Research on Preparation of Golden Flashing Aluminum Powder Pigment", Wu Yin, Li Fengsheng, Bai Huaping, etc., Journal of Materials Science and Engineering, No. 6, 2006, P923~925), but the surface of the aluminum powder is coated The covered PMMA film is not a crystal structure, and the pearlescent luster effect of the product is not obvious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 10g of silicon-coated aluminum powder pigment with a diameter of 10~60μm into the reaction vessel, add 100g of water, and stir well to form aluminum powder suspension. Adjust the pH value of the suspension to 1.8±0.3, slowly raise the temperature of the suspension to 60°C±5°C, and slowly add TiCl to the suspension at a rate of 1.0ml / min under stirring 4 Solution (TiCl 4 Content is 50g / L), and NaOH aqueous solution (NaOH content is 50g / L) is added dropwise at the same time, to maintain the pH value of the suspension stable, so that the titanium salt is slowly hydrolyzed into hydrated titanium dioxide and evenly deposited on the surface of the aluminum powder, when TiCl 4 When 70ml of the solution is added, the pigment presents a strong silver interference color, stop adding the titanium solution and lye, and continue to stir for 30 minutes to stop the reaction. The pigment is filtered, washed until neutral, and dried at about 110°C. Put the dried aluminum powder pi...

Embodiment 2

[0027] Add 5.0g of silicon-coated aluminum powder pigment with a diameter of 10-60μm into the reaction vessel, add 80g of water, and stir well to form an aluminum powder suspension. Adjust the pH value of the suspension to 2.2±0.3, slowly raise the temperature of the suspension to 70°C±5°C, and slowly add TiCl to the suspension at a rate of 0.8ml / min under stirring conditions 4 Solution (content is 50g / L), and NaOH aqueous solution (content is 50g / L) is added dropwise at the same time, to maintain the pH value of suspension stable, make titanium salt solution slowly hydrolyze into hydrated titanium dioxide and evenly deposit on the surface of aluminum powder, when TiCl 4 When 60ml of the solution is added, the pigment presents a golden interference color, stop adding the titanium solution and lye, and continue to stir for 30 minutes to stop the reaction. The pigment is filtered, washed until neutral, and dried at about 120°C. Put the dried aluminum powder pigment in a calcin...

Embodiment 3

[0029] Add 10g of silicon-coated aluminum powder pigment with a diameter of 10~150μm into the reaction vessel, add 100g of water, and stir well to form aluminum powder suspension. Adjust the pH value of the suspension to 2.0±0.3, slowly raise the temperature of the suspension to 80°C±5°C, and slowly add TiCl to the suspension at a rate of 1.0ml / min under stirring 4 Solution (content is 50g / L), and NaOH aqueous solution (content is 50g / L) is added dropwise at the same time, to maintain the pH value of suspension stable, make titanium salt solution slowly hydrolyze into hydrated titanium dioxide and evenly deposit on the surface of aluminum powder, when TiCl 4When 75ml of the solution is added, the pigment presents a red interference color, stop adding the titanium solution and lye, and continue to stir for 30 minutes to stop the reaction. The pigment is filtered, washed until neutral, and dried at about 110°C. Put the dried aluminum powder pigment in a calciner, feed nitrogen...

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PUM

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Abstract

The invention discloses an aluminum powder pigment with iridescent pearl luster and a preparation method thereof. The method uses aluminum powder with an average particle size of 10 μm to 150 μm and a surface coated with SiO2 film as the substrate raw material. The SiO2 film is inert, acid-resistant, heat-resistant, and transparent. The pH of the solution is 1.5-2.5 and the temperature is 60 Under the condition of ℃~80℃, deposit a layer of nano-titanium dioxide film on the transparent SiO2 film by chemical liquid phase deposition, wash and dry, and bake the pigment at 500℃~600℃ under the protection of inert gas 0.5~1.0 h, the high-gloss pearlescent aluminum powder pigment with TiO2 / SiO2 / Al-based composite film was obtained. The pigment also has excellent comprehensive properties such as the illusion interference effect of pearlescent pigments and the conductivity, high hiding power, shielding and non-toxic environmental protection of metallic aluminum powder pigments. It has unique decorative effects and can be widely used in high-end automotive topcoats and high-end decorations. Products, surface coating of high-end instruments, ink printing, children's toys, etc. The method of the invention is simple and feasible, and has industrial feasibility.

Description

technical field [0001] The invention relates to the technical field of novel decorative colored metallic pigments, in particular to a pearlescent iridescent aluminum powder pigment and a preparation method thereof. Background technique [0002] Pearlescent Symphony Aluminum Powder Pigment is a new type of pigment that is prepared by coating a layer of nano-titanium dioxide film with high refractive index on the surface of silicified flake aluminum powder substrate, and using the interference phenomenon of light on the metal oxide film. Inorganic non-metallic / metallic composite material—aluminum-based magic pearlescent pigment. The new pigment has the following characteristics: [0003] (1) It has satin-like pearl luster or bright and shimmering metallic luster and color-flop effect. Metal aluminum has good ductility, and it is easy to make flake aluminum powder with regular shape, uniform particle size distribution and large diameter-to-thickness ratio. It is a good substr...

Claims

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Application Information

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IPC IPC(8): C09C1/64C09C1/28C09C3/06
Inventor 徐卡秋王美琴赵俊卢倩
Owner SICHUAN UNIV
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