Preparation method of cobalt blue and clay mineral hybrid pigment

A technology of clay minerals and hybridization, applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problems of easy mixing of impurities, small particle size of pigments, hard powder agglomeration, etc., and achieve low cost of raw materials and excellent color Bright, anti-agglomeration effect

Active Publication Date: 2015-12-30
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The pigments produced by the liquid phase method have small particle size and high purity, and the calcination temperature is lower than that of the solid phase reaction and is easy to control, but it is easy to cause hard agglomeration of the powder during the later heat treatment, the grain grows by itself, and it is easy to mix impurities, etc.

Method used

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  • Preparation method of cobalt blue and clay mineral hybrid pigment
  • Preparation method of cobalt blue and clay mineral hybrid pigment
  • Preparation method of cobalt blue and clay mineral hybrid pigment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 0.8g of Imon clay into 50mL of water, stir, ultrasonically disperse to form a suspension, and then add 7.501g of Al(NO3 ) 3 and 2.91gCo(NO 3 ) 2 Stir to dissolve, slowly drop 3M NaOH until the pH of the system is 9, react at room temperature for 1 hour, centrifuge, wash until neutral, and dry at 70°C for 24 hours to obtain a pink powder; finally put the pink powder in a muffle furnace and calcinate at 900°C 2h (heating rate is 10oC / min), the obtained sample is marked as CoAl 2 o 4 / Emon Clay-900, the color is dark green.

Embodiment 2

[0030] The calcination temperature is 1000° C., and the others are the same as in Example 1. The resulting hybrid pigment is labeled CoAl 2 o 4 / Aemon's Clay - 1000, the color is bright blue.

Embodiment 3

[0032] The calcination temperature is 1200° C., and the others are the same as in Example 1. The resulting hybrid pigment is labeled CoAl 2 o 4 / Aemon's Clay - 1200, bright dark blue in color.

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Abstract

The invention relates to a preparation method of a cobalt blue and clay mineral hybrid pigment and belongs to the technical field of preparation of nano-spinel hybrid pigments. A hybridization precursor is prepared with a co-precipitation technique with Co(III) salt and Al(III) salt as raw materials and inorganic clay minerals as filler, and the cobalt blue and clay mineral hybrid pigment is prepared through high-temperature crystallization. With the adoption of the clay minerals, the preparation cost of the cobalt blue pigment can be reduced, cobalt blue nanoparticles can be effectively prevented from aggregating and enlarging in the following high-temperature crystallization process, the particle diameter of the nanoparticles ranges from 10 nm to 20 nm, and the prepared cobalt and clay mineral hybrid pigment has a bright color and can meet requirements of durable coatings, neutral ink, CRT (cathode ray tube) fluorescent powder coating pigment products and the like in the cobalt blue market. Besides, the preparation process is simple, the cost of the raw materials is low, and large-scale production is facilitated.

Description

technical field [0001] The invention relates to a method for preparing a cobalt blue / clay mineral hybrid pigment, and belongs to the technical field of preparation of nano spinel hybrid pigments. Background technique [0002] The chemical composition of cobalt blue is mainly CoO, Al 2 o 3 , or cobalt aluminate (CoAl 2 o 4 ), named Pigment 28 in the "Pigment Index", is a metal oxide mixed-phase pigment with a spinel structure, which has excellent thermal stability (up to 1200 ° C) and chemical stability, as well as good weather resistance and acid resistance Alkaline, resistant to corrosion by various solvents, and is obviously superior to other blue pigments in terms of transparency, saturation, chroma, and refractive index, and is a non-toxic and environmentally friendly pigment. However, because cobalt ore is rarely distributed in nature, the preparation of cobalt compounds is expensive, and cobalt blue pigments have been limited to being used as paint pigments for a l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/42C09C3/04C09C3/06
Inventor 牟斌王爱勤罗志河汪琴李华明
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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