Copper chromite black pigment, and preparation method and application thereof

A technology of copper chrome black and pigment, applied in the direction of chromium oxide/hydrate, etc., can solve the problems of poor coloring ability, large particle size, uneven particle size distribution, etc.

Active Publication Date: 2014-04-09
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of the problems in the prior art that copper chrome black pigments have large particle sizes, uneven particle size distribution and poor coloring ability, one of the purposes of the present invention is to provide a pigment with small particle size, uniform particle size distribution and strong coloring ability. The preparation method of copper chrome black pigment

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  • Copper chromite black pigment, and preparation method and application thereof
  • Copper chromite black pigment, and preparation method and application thereof
  • Copper chromite black pigment, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0068] A kind of preparation method of copper chrome black pigment:

[0069] 2.4969g of copper sulfate pentahydrate, 8.003g of chromium nitrate nonahydrate, prepared as a mixed solution, moved to a 250ml three-necked flask, added 0.4874g of emulsifier OP-10, and 9.6096g of urea to prepare a solution, and slowly added the urea solution dropwise into the flask . Under normal pressure, react at 20°C, and end at pH=9. After the reaction, filter, wash with ethanol, and dry to obtain a light blue powder, and keep the precursor at 800°C for 1.5 hours to obtain a copper chromium black pigment. The average particle diameter of the copper chromium black pigment obtained in the present invention is 1.46 μm; the ultraviolet light reflectance at 600 nm is 31.3% when the dilution ratio is 1:10, which is 2.9% lower than that of the prior art.

Embodiment 2

[0071] A kind of preparation method of copper chrome black pigment:

[0072] Copper sulfate pentahydrate 3.7454g, chromium nitrate nonahydrate 12.0045g, prepared as a mixed solution, moved to a 250ml three-neck flask, added polyethylene glycol 400 0.8123g, urea 12.012g to prepare a solution, and slowly added the urea solution dropwise into the flask . Under normal pressure, react at 98°C and end at pH=5. After the reaction, filter, wash with ethanol, and dry to obtain a light blue powder, and keep the precursor at 900°C for 3 hours to obtain a copper chromium black pigment. The average particle diameter of the copper chrome black pigment obtained in the present invention is 0.10 μm; the ultraviolet light reflectance at 600 nm is 31.493% when the dilution ratio is 1:10, which is 2.3% lower than that of the prior art.

Embodiment 3

[0074] A kind of preparation method of copper chrome black pigment:

[0075] The experimental procedure is the same as in Example 1, and the reaction conditions are as follows: 1.2485g of copper sulfate pentahydrate, 4.0015g of chromium nitrate nonahydrate, 0.8952g of sodium dodecylbenzenesulfonate, 9.6096g of urea, under normal pressure, 95°C, 700°C Keep warm for 4h. The average particle size of the copper chrome black pigment obtained in the present invention is 1.95 μm; the ultraviolet light reflectance at 600 nm is 29.656% when the dilution ratio is 1:10, which is 8.0% lower than that of the prior art.

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Abstract

The invention relates to a preparation method of a copper chromite black pigment. The method comprises the steps of adding a urea solution into a mixed solution of a divalent copper salt and a trivalent chromic salt to generate a copper chromite black precipitate in an environment in presence of a surfactant; washing the precipitate with alcohol; and drying the precipitate to obtain the copper chromite black precipitate. The preparation method of the copper chromite black is high in reactive activity; a sintering temperature is reduced by about 200 DEG C than that of a solid phase method; the obtained copper chromite black powder is very fluffy; and the copper chromite black pigment with small particle size and uniform distribution can be obtained without any grinding or ball-milling process.

Description

technical field [0001] The invention relates to a copper chrome black pigment, its preparation method and application, in particular to an ultrafine copper chrome black pigment with a particle diameter within 1 μm, its preparation method and application. Background technique [0002] Copper chrome black, the English name is copper chromite black pigment, the general chemical name is copper chromite, and the chemical formula is CuCr 2 o 4 , is a new type of inorganic metal oxide mixed phase pigment. [0003] Copper chrome black is a spinel-type black metal oxide mixed-phase pigment and an environmentally friendly composite inorganic pigment. It is the most widely used black pigment in mixed-phase pigments. Because of its good black tone, excellent chemical stability, heat resistance, light resistance, weather resistance, acid and alkali resistance, chemical resistance, non-migration, easy dispersion and other advantages, it is widely used in ceramics, enamel, paint and plas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G37/02
Inventor 李平郑晓丹徐红彬王伟文张懿
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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