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Silver pearlescent pigment, and preparation method and application thereof

A pearlescent pigment and pigment technology, applied in the field of pigments, can solve the problems of poor quality and brightness of multi-layer coating structure products, complicated processes, etc., and achieve the effects of stable and reliable product quality, simplified coating process, and easy control.

Inactive Publication Date: 2020-06-19
FUJIAN KUNCAI MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing multi-layer coating processes are complicated, which makes the product quality and brightness of the multi-layer coating structure poor.

Method used

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  • Silver pearlescent pigment, and preparation method and application thereof
  • Silver pearlescent pigment, and preparation method and application thereof
  • Silver pearlescent pigment, and preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0025] Some embodiments of the present invention also provide a method for preparing the above-mentioned silver pearlescent pigment, which includes: sequentially coating the inner layer of titanium dioxide, the layer of silicon aggregated oxide and the outer layer of titanium dioxide on the surface of the pigment substrate by heating and hydrolyzing.

[0026] By means of heating and hydrolysis, in the process of coating the inner layer of titanium dioxide, the silicon aggregated oxide layer and the outer layer of titanium dioxide, the coating is only completed by controlling the temperature of the reaction system, which simplifies the process flow and does not require alkali neutralization (that is, no pH value control), which greatly saves the cost, and the whole reaction process is more controllable, which improves the stability of high-quality products.

[0027] Specifically, the heating hydrolysis method may include:

[0028] In an aqueous solution at a temperature of 80-1...

Embodiment 1

[0047] Weigh 100g of synthetic mica with a particle size of 5-45μm and a diameter-to-thickness ratio ≥ 60, put it in a 5L round bottom flask, add 2000mL of deionized water, put it in a water bath, stir at a rate of 300rps, and heat up to 70°C , add 100mL of 2.5% tin tetrachloride aqueous solution, finish adding in half an hour, then raise the temperature to 85°C, add dropwise 300mL titanium tetrachloride solution (the concentration of titanium tetrachloride is 2M / L) at a rate of 1mL / min, filter , to obtain filter cake. Then add 2000ml of ethanol, heat up to 40°, add 200ml of trichloropropyltriethoxysilane, finish the reaction after 24 hours, filter to obtain a filter cake. Add 2000mL of deionized water again, put it in a water bath, stir at a rate of 300rps, heat up to 70°C, add 100mL of 2.5% tin tetrachloride aqueous solution, add half an hour, then heat up to 85°C, with 1mL Add 300mL titanium tetrachloride solution (titanium tetrachloride concentration is 2M / L) dropwise at ...

Embodiment 2

[0049] Weigh 100g of synthetic mica with a particle size of 5-45μm and a diameter-to-thickness ratio ≥ 60, put it in a 5L round bottom flask, add 2000mL of deionized water, put it in a water bath, stir at a rate of 300rps, and heat up to 70°C , add 100mL of 2.5% tin tetrachloride aqueous solution, finish adding in half an hour, then raise the temperature to 85°C, add dropwise 300mL titanium tetrachloride solution (the concentration of titanium tetrachloride is 2M / L) at a rate of 1mL / min, filter , to obtain filter cake. Then add 2000ml of ethanol, heat up to 60°, add 200ml of trichloropropyltriethoxysilane, finish the reaction after 24 hours, filter to obtain a filter cake. Add 2000mL of deionized water again, put it in a water bath, stir at 300rps, heat up to 70°C, add 100mL of 2.5% tin tetrachloride aqueous solution, add half an hour, then heat up to 90°C, add 1mL Add 300mL titanium tetrachloride solution (titanium tetrachloride concentration is 2M / L) dropwise at a rate of 2...

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Abstract

The invention relates to the field of pigments, specifically to a silver pearlescent pigment and a preparation method and application thereof. The pigment comprises a pigment substrate, and a titaniumdioxide inner layer, an aggregated oxide layer with a silica skeleton structure and a titanium dioxide outer layer which sequentially coat the pigment substrate in a heating hydrolysis manner, wherein the aggregated oxide layer with the silica skeleton structure is formed by hydrolytic condensation of siloxane and has a hollow structure. According to the silver pearlescent pigment provided by theinvention, a multi-layer coating structure with alternate high and low refractive indexes is formed, so the brightness of the pearlescent pigment can be effectively improved; the aggregated oxide layer has the hollow structure, so a refractive index is reduced, and a larger refractive index difference exists between layers, which enables the glossiness of a product to be improved and covering power to be enhanced; besides, the titanium dioxide inner layer, the aggregated oxide layer and the titanium dioxide outer layer realize coating in a heating hydrolysis manner, so a coating process is simplified, a pH value does not need to be adjusted, control is convenient, and product quality is more stable and reliable.

Description

technical field [0001] The invention relates to the field of pigments, in particular to a silver pearlescent pigment and its preparation method and application. Background technique [0002] As a new type of pigment, pearlescent pigments are widely used in traditional organic pigments, inorganic pigments, metal pigments (aluminum silver paste, copper gold powder, etc.) and other application fields. Because of their environmental protection and safety, the development trend to replace traditional pigments is increasingly strengthened. With the expansion of product application fields and the adjustment needs of market aesthetics, the types and colors of pearlescent pigments have become increasingly rich, and the preparation technology of pearlescent pigments and the structure of pearlescent products have also begun to diversify. The layer cladding structure turns to upgrade. However, most of the existing multi-layer coating processes are relatively complicated, resulting in p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/00C09C1/40C09C3/06C09C3/12C09D167/00C09D5/36C08L23/12C08K9/02C08K9/06C08K3/34
CPCC01P2006/65C08K3/34C08K9/02C08K9/06C09C1/0027C09C1/405C09C3/006C09C3/043C09C3/063C09C3/12C09C2200/1033C09C2200/202C09C2200/401C09C2220/106C09D167/00C08L23/12
Inventor 费明武超鲍领翔陈刘谢秉昆
Owner FUJIAN KUNCAI MATERIAL TECH
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