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Titanium-free golden pearlescent pigment as well as preparation method and application thereof

A pearlescent pigment and golden technology, applied in the direction of inorganic pigment treatment, chemical instruments and methods, fibrous fillers, etc., can solve the problems of light golden color, low color saturation, and high pigment price, and achieve high color saturation and processing operation Convenient, Widely Applicable Effects

Pending Publication Date: 2022-04-05
GUANGXI CHESIR PEARL MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the gold color of this pearlescent pigment is relatively light, and the color saturation is not high. In addition, because the pigment contains titanium oxide, the price of the pigment is relatively high.
[0004] There are also golden pearlescent pigments that do not contain titanium tetrachloride in the prior art, for example 3: although the patent CN 101134850 A is a strong metal golden pearlescent pigment that does not contain titanium tetrachloride in the coating process, the golden pearlescent pigments produced by it are The L*, a*, and b* values ​​of pearlescent pigments are all low, and there is room for improvement

Method used

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  • Titanium-free golden pearlescent pigment as well as preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0065] A preparation method of titanium-free golden pearlescent pigment, the method comprises the following steps:

[0066] 1) Dispersing the base material in the dispersion liquid to obtain a base material suspension.

[0067] 2) Adding a mixed solution of tin tetrachloride and aluminum trichloride to the substrate suspension to obtain a substrate suspension with a tin chloride-aluminum chloride composite layer.

[0068] 3) adding ferric chloride solution to the substrate suspension having the tin chloride-aluminum chloride composite layer to obtain the substrate suspension having the ferric chloride layer / tin chloride-aluminum chloride composite layer.

[0069] 4) Add sodium metasilicate pentahydrate solution to the substrate suspension with ferric chloride layer / tin chloride-aluminum chloride composite layer to obtain sodium metasilicate pentahydrate layer / ferric chloride layer / chloride Substrate floating liquid for tin-aluminum chloride composite layer.

[0070] 5) Add a...

Embodiment 1

[0089] Take 50g of synthetic mica flakes with a particle size ranging from 10μm to 40μm and put them into a reaction kettle with a capacity of 2L, add deionized water at a solid-to-liquid ratio of 1:11 and stir evenly to make a suspension, and heat it in a constant temperature water bath until 65°C, adjust the pH to about 1.6 with 10% hydrochloric acid.

[0090] Add a mixed solution of 80g / L tin tetrachloride and 60g / L aluminum trichloride with a peristaltic pump, and at the same time use 10% hydrochloric acid to balance the pH value at 1.5, when the coating rates of tin oxide and aluminum oxide reach 1.5% , stop feeding.

[0091] The temperature of the solution is controlled at 75°C, and 65g / L ferric chloride solution is added to the above-mentioned suspension reaction solution, and the pH value is balanced at 3.3 with 25% sodium hydroxide solution at the same time, when the coating rate of ferric chloride reaches 35%. , stop feeding.

[0092] The temperature of the solutio...

Embodiment 2

[0097] Repeat Example 1, except that the coating ratios of tin oxide and aluminum oxide are both 0.5%.

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Abstract

A titanium-free golden pearlescent pigment, the pearlescent pigment comprising: a base material; the tin oxide-aluminum oxide composite layer is coated on the base material; the ferric oxide layer is coated on the tin oxide-aluminum oxide composite layer; the silicon oxide layer is coated on the iron oxide layer; and the cobalt oxide-iron oxide composite layer is coated on the silicon oxide layer. The titanium-free golden pearlescent pigment provided by the invention has the advantages of simple preparation process, easily available raw materials, convenient processing operation and the like, and can be widely applied to large-scale production of the golden pearlescent pigment.

Description

technical field [0001] The invention relates to a pearlescent pigment and its preparation method and application, in particular to a titanium-free golden pearlescent pigment, its preparation method and application, and belongs to the technical field of pearlescent pigments. Background technique [0002] At present, the golden pearlescent pigment products launched by domestic and foreign pearlescent pigment manufacturers on the market are usually coated with two or more metal oxides on the surface of the substrate to form a layered structure. Such as: Substrate flakes / TiO 2 *Fe 2 o 3 , Substrate flakes / SnO 2 *TiO 2 / Fe 2 o 3 , Substrate flakes / SnO 2 *TiO 2 / Fe 2 o 3 *Al 2 o 3 / SnO 2 *TiO 2 , Substrate flakes / SnO 2 *Al 2 o 3 / TiO 2 / SiO 2 / Fe 2 o 3 Pearlescent pigments with such structures, the existing published patent documents are: US-5135812; JP H7-759; US 3438796; DE 4405494; CN 10212785 B; 101134850A. This kind of process is produced by the combina...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/40C09C3/06C09C3/04
Inventor 林敏立林正交苏尔田谢思维黎伍建龙宪君林矗立蒙泽元
Owner GUANGXI CHESIR PEARL MATERIAL CO LTD