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Method for synthesizing rutile mica titanium pearlescent pigment without calcination

A technology of rutile and pearlescent pigments, which is applied in the field of inorganic pigments, can solve the problems of high energy consumption for high-temperature calcination, reduce the adhesion of film layers, and increase production costs, and achieve low cost, simple production process equipment, and low energy consumption. Effect

Inactive Publication Date: 2013-09-25
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Although the above-mentioned patent method can obtain rutile TiO 2 Coated pearlescent pigments, but due to high temperature calcination, it will have two adverse effects: one is due to TiO 2 The difference in thermal expansion coefficient between the film layer and the substrate, high temperature calcination will reduce the TiO 2 The adhesion of the film layer; the second is that high-temperature calcination consumes high energy, requires high equipment, and increases production costs

Method used

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  • Method for synthesizing rutile mica titanium pearlescent pigment without calcination
  • Method for synthesizing rutile mica titanium pearlescent pigment without calcination
  • Method for synthesizing rutile mica titanium pearlescent pigment without calcination

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Embodiment 1

[0031] The preparation of embodiment 1 pearlescent pigment

[0032] A method for calcination-free synthesis of rutile mica titanium pearlescent pigments, comprising the steps of:

[0033](1) Mix 10 g of synthetic mica powder into a suspension with 1000 ml of distilled water, stir and heat to 70° C., and add hydrochloric acid to adjust the pH value to 2.0; the particle size of flake mica powder is 10 to 60 μm;

[0034] (2) in the suspension of step (1), adding 20ml concentration is the tin tetrachloride aqueous solution of 15g / l, stirs, drips NaOH aqueous solution (mass concentration is 10%) simultaneously, maintains pH value to be 2, keeps suspension The temperature is 70°C; the time for adding the tin tetrachloride solution is 1h;

[0035] (3) Keep the temperature of the system at 70°C, add hydrochloric acid to adjust the pH value to 1.0, stir, and slowly add a titanium tetrachloride solution (titanium tetrachloride absolute ethanol solution) with a concentration of 110g / l d...

Embodiment 2

[0039] The preparation of embodiment 2 pearlescent pigments

[0040] A method for calcination-free synthesis of rutile mica titanium pearlescent pigments, comprising the steps of:

[0041] (1) Mix 10 g of synthetic mica powder into a suspension with 1000 ml of distilled water, stir and heat to 70° C., and add hydrochloric acid to adjust the pH value to 2.0; the particle size of flake mica powder is 10 to 60 μm;

[0042] (2) adding 20ml concentration in the suspension of step (1) is the manganese chloride aqueous solution of 15g / l, stirs, drips NaOH aqueous solution (mass concentration is 10%) simultaneously, maintains pH value to be 2, keeps the suspension The temperature is 70°C; the dropping time of the manganese chloride solution is 1h;

[0043] (3) Keep the temperature of the system at 70°C, add hydrochloric acid to adjust the pH value to 1.0, stir, and slowly add a titanium tetrachloride solution (titanium tetrachloride absolute ethanol solution) with a concentration of ...

Embodiment 3

[0046] The preparation of embodiment 3 pearlescent pigments

[0047] A method for calcination-free synthesis of rutile mica titanium pearlescent pigments, comprising the steps of:

[0048] (1) Prepare 10 g of synthetic mica powder into a suspension with 1000 ml of distilled water, stir and heat to 65° C., and add hydrochloric acid to adjust the pH value to 2.0; the particle size of flake mica powder is 10 to 60 μm;

[0049] (2) in the suspension of step (1), adding 20ml concentration is the tin tetrachloride aqueous solution of 15g / l, stirs, drips NaOH aqueous solution (mass concentration is 10%) simultaneously, maintains pH value to be 2, keeps suspension The temperature is 65°C; the time for adding the tin tetrachloride solution is 1h;

[0050] (3) Keep the temperature of the system at 65°C, add hydrochloric acid to adjust the pH value to 1.0, stir, and slowly add a titanium tetrachloride solution (titanium tetrachloride absolute ethanol solution) with a concentration of 11...

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Abstract

The invention discloses a method for synthesizing a rutile mica titanium pearlescent pigment without calcination. The method comprises the following steps of: preparing a mica suspension from flaky mica powder serving as a substrate with distilled water; dropwise adding a stannic chloride aqueous solution or a manganese chloride aqueous solution under the condition of controlling the pH value; adding a titanic tetrachloride absolute ethyl alcohol solution; stirring and heating at the temperature between 65 DEG C and 85 DEG C for reacting; and filtering, washing and drying to directly obtain a rutile TiO2-coated pearlescent pigment. By adopting the preparation method of the pearlescent pigment, the rutile TiO2-coated pearlescent pigment can be obtained without calcination, the energy consumption is low, energy conservation and cost reduction are facilitated, and a new option is provided for a high-grade pearlescent pigment in the field; and the method has a wide application prospect.

Description

technical field [0001] The invention relates to a pearlescent pigment, in particular to a method for synthesizing a rutile mica titanium pearlescent pigment without calcining, and belongs to the field of inorganic pigments. Background technique [0002] Pearlescent pigment is a kind of pigment with pearly luster, which can give objects a pearly luster and present a profound three-dimensional texture. At present, pearlescent pigments are divided into two categories: natural pearlescent pigments and artificial pearlescent pigments. Natural pearlescent pigments refer to pearlescent substances that are extracted from natural animals and plants by various methods, or mined and sorted from natural minerals. For example, pearl element extracted from natural pearls; organic compounds such as purine extracted from fish scales or bird feathers that only exist in living organisms; pearl mica sorted from natural mica mines, etc. Natural pearlescent pigments are expensive due to the sh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/40C09C1/28C09C3/06
Inventor 吴笑梅高强樊粤明
Owner SOUTH CHINA UNIV OF TECH