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Colored aluminum pigment with high color depth and preparation method thereof

A technology of aluminum pigment and color concentration, applied in the direction of inorganic pigment treatment, chemical instruments and methods, fibrous fillers, etc.

Inactive Publication Date: 2009-06-03
WENZHOU YOUNGBIO CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The colored aluminum powder obtained by using this patent can only obtain reddish aluminum powder, and the treatment method of the metal substrate is also limited by the patent document JP-A-2003-41150

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0015] Take 1KG of oily 60um floating corn-type aluminum pigment slurry (solid content is 0.7KG), wash with n-butanol and disperse with 5L of absolute ethanol, control the temperature between 30-70°C, add 100g of ethyl orthosilicate and 75ml of aqueous solution, using ethylenediamine as a catalyst, after the reaction was completed and aged for 10 hours, was washed with ethanol by suction filtration. After dispersing the drained slurry with 15L of water, slowly add 50-80g / l ferric chloride solution under the conditions of temperature control at 80°C and pH value 4.0 and keep the pH value constant with dilute sodium hydroxide solution. During the reaction process, when the color of the aluminum powder in the reaction kettle is orange-yellow, stop feeding, then filter and wash the feed liquid until the filtrate is free of chloride ions, dry it at 105°C, and calcinate at 300-500°C for 30 minutes to obtain the first layer. SiO 2 Layer coverage is 1.8%, the second layer is Fe 2 o ...

example 2

[0026] Take 100g of water-based 60um non-leafing silver round aluminum pigment paste (solid content is 70%), wash with butanone and disperse with 1L of absolute ethanol, add 100g of tetraethyl orthosilicate and stir evenly, then add 40ml of distilled water and stir for 30min, Control the temperature at 50°C, slowly add dilute ammonia solution dropwise, and after the dropwise addition, age the feed solution for 10 hours, then filter and wash it with absolute ethanol.

[0027] In a 2L beaker, disperse the slurry drained in the previous step with 1L of water, control the temperature at 75°C, adjust the pH value to 2.0-3.0 with dilute hydrochloric acid, and slowly add 61ml, 1mol / l tetrachloride Titanium chloride solution, and use dilute sodium hydroxide to keep the pH value of the system constant. After the feeding is completed, use dilute sodium hydroxide to raise the pH value to 4.0, and slowly add 50-80 g / l ferric chloride solution dropwise. When the feed liquid in the beaker ...

example 3

[0038]Take 1KG of oily 60um floating silver round aluminum pigment paste (solid content is 0.7KG), wash with ethylene glycol-methyl ether and disperse with 10L of absolute ethanol, control the temperature between 30-70°C, add 300g of orthosilicic acid Ethyl ester and 1L aqueous solution, using ethylenediamine as catalyst, aging for 15 hours after the reaction, washing with ethanol suction filtration. After dispersing the drained slurry with 10L of water, control the temperature at 85°C, adjust the pH value to 6.0 with dilute sodium hydroxide, and slowly add 1mol / l CrCl dropwise 3 Solution 2.6L, and maintain a constant pH value with dilute sodium hydroxide. Stir at constant temperature for 30 minutes after feeding, filter and wash until free of chloride ions, dry the filter cake at 105°C, and calcinate at 300°C for 30 minutes to obtain green aluminum powder with high color concentration. The structure of the green aluminum pigment is the first layer of SiO 2 Covering rate 7.2...

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PUM

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Abstract

The invention relates to a colored aluminum pigment with high color depth and a preparation method thereof. The colored aluminum pigment is obtained by depositing a layer of silicon dioxide on a flaky metallic aluminum sheet substrate and then depositing one or more layers of metal oxide on the surface of the silicon dioxide, and the colored aluminum pigment exists in the form of dry powder. The preparation method comprises the following steps: a. stirring to disperse commercially available aluminum pigment slurry in alcohol, alcohol ether or a ketone solvent; b. regulating the temperature to 30-80 DEG C, respectively adding tetraethoxysilane and aqueous solution to the dispersed aluminum pigment slurry with the mol ratio of the tetraethylorthosilicate to the water ranging from 1:0.5 to 1:20, adding a catalyst such as ethylenediamine solution or aqueous ammonia, and obtaining aqueous aluminum pigment slurry by vacuum filtration and washing after the reaction; and c. cladding the aqueous aluminum pigment slurry obtained in the step b with the hydrated metal oxide on the powdered aluminum surface in a liquid phase. The preparation method help prepare the colored aluminum pigment with diversified colors and high color depth without reducing brightness of the original aluminum pigment slurry.

Description

technical field [0001] The invention relates to a color aluminum pigment with high color density and a preparation method thereof. Background technique [0002] Flake aluminum powder or aluminum pigment paste is an effect pigment made of metallic aluminum with a silver-white metallic luster. It is the most widely used and most diverse type of metallic pigment. Different fields such as ink, instruments and equipment, household appliances, etc. Aluminum pigments have excellent covering ability, are opaque to light, can reflect 60%-90% of visible light, infrared rays, and ultraviolet rays, and have a cooling effect on sunlight. At first, its metallic color was used for decoration, and now it has been developed to make the decorations have colorful colors, and at the same time, it also presents metallic highlights. Therefore, the demand for colored aluminum pigments in the market is also increasing. Colored aluminum pigment is a kind of flaky aluminum pigment after surface mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/64C09C3/06
Inventor 潘二军张海滨赵会哲李善云
Owner WENZHOU YOUNGBIO CHEM
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