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A kind of carbon black colored pearlescent pigment and preparation method thereof

A pearlescent pigment and carbon black technology, applied in the field of inorganic pigments, can solve problems such as poor adhesion and difficulty in controlling the thickness of the carbon layer on the surface of pearlescent pigments

Active Publication Date: 2018-07-27
林一中
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the literature "Preparation of Phthalocyanine Blue-Activated Carbon Composite Mica Titanium Pearlescent Pigment" (Hou Wenxiang, Tan Junru, Fu Xiansong, etc. Preparation of Phthalocyanine Blue-Activated Carbon Composite Mica Titanium Pearlescent Pigment, Coating Industry, 2002, (5): 22 -24.) has recorded a method for preparing composite carbon-coated pearlescent pigments, mainly considering that phthalocyanine blue and activated carbon are not easy to disperse in the water phase, and adding surfactant makes the surface of activated carbon and mica titanium pearlescent pigments Compatible and use AlCl 3 Al(OH) produced by hydrolysis 3 As a lake agent, the thickness of the carbon layer on the surface of the pearlescent pigment obtained by this method is not easy to control, and the adhesion is poor

Method used

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  • A kind of carbon black colored pearlescent pigment and preparation method thereof
  • A kind of carbon black colored pearlescent pigment and preparation method thereof
  • A kind of carbon black colored pearlescent pigment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Weigh 10g of commercially available natural mica-based titanium pearlescent pigment AG111 pigment (natural mica base pearlescent pigment, particle size <15μm, the titanium dioxide coating rate is 43%, and the titanium tetrachloride is used as the deposition agent to use the co-current hydrolysis method. (The so-called coating rate refers to the percentage of the coating contained in the pearlescent pigment per unit mass. If the coating in AG111 is titanium dioxide, and the titanium dioxide contained in every 100g AG111g is 43g, the coating rate of titanium dioxide in AG111 is 43%. ) Is placed in a reactor, and 100 g of water is added to it to prepare a suspension. Stir until the dispersion is uniform, heat the suspension to 80° C., add 2.5 g of polyethylene glycol 600 to the suspension, adjust the pH to 8.5, stir and react for 2 hours, filter, and dry to obtain the precursor.

[0085] The dried precursor is placed in a vacuum furnace, evacuated to an absolute pressure of 0...

Embodiment 2

[0087] Weigh 10g of synthetic mica-based pearlescent pigment AG6531 (AG6531, using synthetic mica as the substrate, particle size range 10-60μm, Fe 2 O 3 The coating rate is about 36%, using ferric chloride as the depositing agent to use the co-current hydrolysis method to prepare) placed in the reactor, adding 55g of water to prepare a suspension, stirring until the dispersion is uniform, the suspension is heated to 85 ℃, add 2g to the suspension HYDROSIL 2909 (Yes with HO[SiR 61 (OH)O] x6 [SiR 62 (OH)O] y6 Aqueous silane with amine propyl and isobutyl of general formula H), adjust the pH to 8.5, stir and react for 1 h, filter, and dry to obtain the precursor.

[0088] The dried precursor is placed in an atmosphere furnace, and argon (Ar) is introduced, the temperature is raised to 600° C., and the temperature is kept for 1.5 hours. Under the protection of argon (Ar), it is cooled in a furnace to obtain a carbon black colored pearlescent pigment. The prepared carbon black-coate...

Embodiment 3

[0094] Weigh 10g of the intermediate product before calcination in the process of synthetic mica-based pearlescent pigment AG6126 (semi-finished product two, the intermediate product uses synthetic mica as the base material, with a particle size range of 5 to 5 μm, and the first coating layer is tin dioxide hydrate , The coating rate is about 0.8% based on tin dioxide, and it is prepared by using the co-current hydrolysis method with tin tetrachloride as the depositing agent. The second coating layer is titanium dioxide hydrate, and the coating rate after calcination is calculated based on titanium dioxide About 38%, prepared by co-current hydrolysis with titanium tetrachloride as a deposition agent.) Placed in a reactor, and 100g of water is added to it to prepare a suspension. Stir until the dispersion is uniform, heat the suspension to 80°C, add 1.2 g of octyltriethoxysilane to the suspension, adjust the pH value to 3.0, stir and react for 1.5h, filter, and dry to obtain the ...

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Abstract

The invention discloses carbon black coloring pearlescent pigment and a preparation method thereof. The carbon black coloring pearlescent pigment comprises a pearlescent pigment matrix and a carbon black coloring layer which is prepared in situ on the surface of the pearlescent pigment matrix by a treating agent. The preparation method includes: using the treating agent to envelope the pearlescent pigment matrix; calcining at high temperature in an atmosphere of inactive gas and / or reductive gas or in a vacuum condition. The preparation method is simple in process, high in controllability and repeatability and low in cost, and the carbon black coloring pearlescent pigment prepared by the method is compact in carbon layer, firm in bonding, less prone to decoloring and easy in large-scale production.

Description

Technical field [0001] The invention belongs to the field of inorganic pigments, and specifically relates to carbon black colored pearlescent pigments and a preparation method thereof. Background technique [0002] Pearlescent pigment is an effect pigment with pearl luster, which is widely used in coatings, plastics, cosmetics, anti-counterfeiting inks, printing and dyeing, leather, rubber, paper printing and other fields. The structure of the pearlescent pigment layer (take a single-layer coated pearlescent pigment as an example) and the schematic diagram of the gloss principle are as follows figure 1 Shown. It can be seen from this figure that the color of the pearlescent pigment is a false color caused by light reflection interference. According to the thickness of the outer coating layer, interference colors such as silver, gold, red, purple, blue, and green are sequentially produced. In order to achieve a specific effect, pearlescent pigments need to be colored, especially...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/40C09C3/06
CPCC01P2006/40C09C1/0015C09C1/0021C09C3/063C09C2200/401C09C2220/10
Inventor 林一中王振兴张骞
Owner 林一中