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Method for preparing metal coated pearlescent pigment

A pearlescent pigment and metal coating technology, applied in the field of pearlescent pigments, can solve the problems of affecting the stability of the coating, the presentation of efficacy cannot be manifested, and it is difficult to maintain the color quality of the pearlescent coating, and achieve the effect of improving photocatalytic activity and antibacterial

Active Publication Date: 2014-05-14
浙江瑞成新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] But, natural mica has its defect as the matrix material of pearlescent pigment: (1) though the mica flake that (1) grinds and grades by wet grinding method can obtain less thickness and larger diameter-to-thickness ratio (general requirement is greater than 50), but Usually there is a wide range of thickness distribution (0.2-1 micron), so it is easy to affect the stability of the coating, and it is not easy to make pearlescent pigments with uniform hue; The formed layers and edge gradients cause light to scatter and reduce the pearlescent effect; (3) natural mica contains colored impurity ions such as iron ions, and requires very complicated and time-consuming steps to remove these impurity ions
[0007] In the past, when pearlescent pigments were prepared into coatings to have other functions, other effective agents such as antibacterial agents or antifouling agents were often added to increase the functions of the coatings. However, the more additives were added, the interaction between the additives The greater the factor, the less effective the performance will be. This kind of mixing method will cause the pearlescent pigment to fail to express its characteristics and it is difficult to maintain the color quality of the pearlescent coating.

Method used

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  • Method for preparing metal coated pearlescent pigment
  • Method for preparing metal coated pearlescent pigment
  • Method for preparing metal coated pearlescent pigment

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1: present embodiment provides a kind of pearlescent pigment, and its structure is:

[0030] (1) if figure 1 As shown, on the surface of the sheet substrate 1, a plurality of columnar Ti 2 o 3 The nanorod 2, the sheet substrate 1 can be natural mica sheet, synthetic mica sheet, glass sheet, sheet aluminum powder, sheet expanded perlite, aluminum oxide, silicon dioxide, etc., the sheet substrate 1 The particle size can be 2-800 microns, and the thickness can be 0.1-10 microns. In the present invention, an aqueous solution of titanium trichloride hydrochloric acid is slowly added dropwise to the solution containing sheet substrate 1 to hydrolyze titanium trichloride into trioxide Dititanium is adsorbed on the sheet substrate 1 to form a Ti 2 o 3 Nanorod 2, where Ti 2 o 3 Nanorods 2 can control Ti according to reaction rate, reaction time and pH value 2 o 3 The height of nanorod 2, to form the pearlescent pigment of different colors, just utilize Ti 2 o...

Embodiment 2

[0031] Embodiment 2: the present embodiment provides a kind of pearlescent pigment coated with metal, and its structure is:

[0032] (1) if figure 2 Shown, continue the follow-up step of embodiment 1, further provide another kind of pearlescent pigment. (2) Utilize Ti on the pearlescent pigment of embodiment 1 2 o 3 Reducibility, after redox reaction with metal salt, Ti 2 o 3 oxidized to TiO 2 , metal particles 4 are reduced and deposited on TiO 2 1 on the nanorod 3 and the sheet substrate; wherein the metal salt can be metal salts such as chloroauric acid, chloroplatinic acid, ruthenium chloride, palladium chloride, rhodium chloride, ferric chloride, copper nitrate and palladium acetate any one or a combination of two or more. Next, according to the use of different metal particles 4 deposited on the TiO 2 On the nanorod 3 and the sheet substrate 1, pearlescent pigments coated with different metals can be obtained. For example, after redox reaction with an aqueous so...

Embodiment 3

[0033] Embodiment 3: present embodiment provides a kind of pearlescent pigment, and its structure is:

[0034] (1) Use commercially available pearlescent pigments (YB103, YB205, YB219, YB300, YB504, etc.) 2 o 3 The nanorods grow by reaction, and the Ti is controlled according to the time of adding the titanium trichloride solution 2 o 3 The growth height of the nanorods, after reacting for 8 to 12 hours, the pH value is controlled at 1.5-2.5, Ti 2 o 3 The growth height of the nanorod is 60-80 nanometers, and it has a length of 30-60 nanometers and a width of 30-60 nanometers, and a plurality of Ti rods arranged at intervals. 2 o 3 Nanorods will form a rough surface on their surface, and have a total roughness Rz(DIN) between 60-80, and Ti 2 o 3 Coated pearlescent pigments, and the pearlescent pigments form multiple Ti on the surface 2 o 3 The nanostructure of nanorods has a lotus effect, which produces anti-fouling and dust-proof effects.

[0035] Then, (2) using the...

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Abstract

The invention discloses a method for preparing a metal coated pearlescent pigment. The pearlescent pigment is characterized by comprising a flaky substrate and a plurality of titanium dioxide nanorods which are arranged at intervals and are formed on the flaky substrate, so that a nano-structured surface with roughness can be formed by the titanium dioxide nanorods of the pearlescent pigment, and then, a plurality of metal particles are deposited on each titanium dioxide nanorod and the flaky substrate respectively.

Description

technical field [0001] The invention belongs to the field of pearlescent pigments, and relates to a powder pigment, in particular to a metal-coated pearlescent pigment and a preparation method thereof. Background technique [0002] Pearlescent pigments are pigments that give pearly luster to products. It is a transparent or translucent flake as the core, and uses a special chemical process to coat one or more layers of titanium dioxide and other metal oxides on its surface. When When the light hits the interface of the pearlescent pigment, reflected light and refracted light will be produced, part of the light is transmitted and then reflected, and they interfere with each other to produce a three-dimensional pearlescent color. At present, most of the base materials are mica flakes, which are covered with a high-refraction titanium dioxide coating. When white light shines on this type of pigment, it is partially reflected by the titanium dioxide layer, and the rest of the li...

Claims

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Application Information

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IPC IPC(8): C09C1/40C09C3/06A01N59/16A01P1/00C09D5/36C09D5/14A61K8/29A61K8/19A61Q3/02A61Q1/10A61Q1/04A61Q1/08
Inventor 张海滨郭永城李善云黄兆忠徐步方穆彬郭秋容吴兴伟
Owner 浙江瑞成新材料股份有限公司
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