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A kind of doping composite oxide coated mica pearlescent composite pigment and preparation method thereof

A technology of composite oxides and composite pigments, applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., to achieve the effects of improving performance, enriching varieties, and excellent performance

Inactive Publication Date: 2015-12-02
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problem of multi-layer coating of traditional pearlescent mica pigments, and at the same time improve the temperature resistance, weather resistance, corrosion resistance and coloring performance of composite pigments

Method used

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  • A kind of doping composite oxide coated mica pearlescent composite pigment and preparation method thereof
  • A kind of doping composite oxide coated mica pearlescent composite pigment and preparation method thereof
  • A kind of doping composite oxide coated mica pearlescent composite pigment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Mica pretreatment: 70-80°C water bath temperature, 3% hydrochloric acid to mica liquid-solid ratio of 20, stirring and cleaning for 30 minutes, washing and drying. Take 30g of pretreated mica (particle size 5-25μm) to prepare 10wt% mica slurry, and adjust the pH to 2.

[0031] (2) Co. 2-x Ni x TiO 4 / Mica (x=0.3) composite pigment precursor preparation: preparation of titanium, cobalt, nickel ion mixed solution: 8.5gTiCl 4 , was added dropwise to a solution of 20ml concentrated hydrochloric acid and 50ml deionized water, and Co(NO 3 ) 2 .6H 2 O21.72g, Ni (NO 3 ) 2 .6H 2 O3.83g and surplus 150ml deionized water; 25g sodium hydroxide is dissolved in water and is mixed with the solution of the same volume as titanium cobalt nickel ion solution. Heat the mica slurry in a water bath to 80°C under the condition of mechanical stirring at 200rmp, slowly add titanium cobalt nickel solution and sodium hydroxide solution dropwise at the same time, dropwise time is 2h...

Embodiment 2

[0034] (1) Mica pretreatment: 70-80°C water bath temperature, 5% hydrochloric acid to mica liquid-solid ratio of 20, stirring and cleaning for 30 minutes, washing and drying. Take 30g of pretreated mica (particle size 5-25μm) to prepare 10wt% mica slurry, and adjust the pH to 2.

[0035] (2) Co. 2-x Ni x TiO 4 / Mica (x=0.5) composite pigment precursor preparation: preparation of titanium cobalt nickel ion mixed solution: 8.5gTiCl 4 , was added dropwise to a solution of 20ml of concentrated hydrochloric acid and 50ml of deionized water, and 19.16g of Co (NO 3 ) 2 .6H 2 O, 6.38gNi (NO 3 ) 2 .6H 2 O and surplus 150ml deionized water; 25.5g sodium hydroxide is dissolved in water and is mixed with the solution of the same volume as titanium cobalt nickel ion solution. Heat the mica slurry in a water bath to 80°C under the condition of mechanical stirring at 200rmp, slowly add titanium cobalt nickel solution and sodium hydroxide solution dropwise at the same time, dropwise...

Embodiment 3

[0039] (1) Mica pretreatment: 70-80°C water bath temperature, 5% hydrochloric acid to mica liquid-solid ratio of 20, stirring and cleaning for 30 minutes, washing and drying. Take 30g of pretreated mica (particle size 5-25μm) to prepare 10wt% mica slurry, and adjust the pH to 2.

[0040] (2) Co. 2-x Ni x TiO 4 / Mica (x=0.5) composite pigment precursor preparation: preparation of titanium-cobalt-nickel ion mixed solution: 2.83gTiCl 4 , was added dropwise to a solution of 7ml of concentrated hydrochloric acid and 17ml of deionized water, and 6.38g of Co (NO 3 ) 2 .6H 2 O, 2.12gNi (NO 3 ) 2 .6H 2 O and surplus 50ml deionized water; 8.6g sodium hydroxide is dissolved in water and is mixed with the solution of the same volume as titanium cobalt nickel ion solution. Heat the mica slurry in a water bath to 80°C under the condition of mechanical stirring at 250rmp, slowly add titanium cobalt nickel solution and sodium hydroxide solution dropwise at the same time, dropwise tim...

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Abstract

The invention discloses a composite oxide coated mica pearled composite pigment and a preparation method thereof. The composite pigment with a flexible pearl luster is obtained by adopting a precipitation method, taking mica as a substrate, adjusting the pH (Potential of Hydrogen) of mica slurry to 2, heating in a water bath, agitating and dripping acidic solutions and alkaline solutions of titanium, cobalt and doped metal M, adjusting the pH to 9-10, filtering, washing and drying, and calcining at 1000 DEG C. The surface of the pigment is provided with nano-grade Co2-xMxTiO4 composite oxide particles; the brightness and the hue value of the composite pigment are changed along the variety, use amount and covering rate of the doped metal M; the composite pigment doped with Ni<2+>, Zn<2+> and Mg<2+> is yellow green and the brightness is improved; the brightness is increased along the increasing of the doping amount; the composite pigment doped with the nickel has the same doping amount; the brightness and the yellow phase value are reduced along the increasing of the doping amount and the color becomes deep. The green phase value a and the yellow phase value b of the composite pigment doped with Cu<2+> and Mn<2+> are obviously reduced and the hue of the pigment becomes deep; the doped copper is dark green and the doped manganese is brownish green. According to the high-performance mica-based pearled composite pigment, the performance is better than that of a common mica pearled composite pigment and the preparation process is simple.

Description

technical field [0001] The invention relates to a method for preparing a doped composite oxide-coated mica pearlescent composite pigment, which belongs to the field of preparation of micro-nano composite inorganic pigments. Background technique [0002] Pearlescent mica pigment is a kind of composite pigment formed by coating mica with metal oxide on the surface of mica. According to the cladding structure, it can be divided into two types: single cladding structure and multi cladding structure. The single cladding structure means that only one layer of colorless, transparent or colored metal oxide film is covered on the mica surface; double cladding or multiple cladding Layer structure, that is, two or more layers of metal oxide films are coated on the surface of mica, not only coated with a colorless and transparent metal oxide film that produces pearlescent light due to interference, but also coated with a metal oxide film with coloring properties. [0003] Pearlescent m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/40C09C1/36C09C3/06
Inventor 叶明泉刘春兰韩爱军陈昕李志涛
Owner NANJING UNIV OF SCI & TECH
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