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Bright pigment, pigment-containing composition, and pigment-containing coated body

A technology of bright pigments and gold particles, applied in the field of coatings containing bright pigments and compositions containing bright pigments

Active Publication Date: 2021-02-09
NIPPON SHEET GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can also be understood from the results of the various examples in Patent Document 1 that so far, the application of gold particles in bright pigments is essentially limited to red pigments

Method used

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  • Bright pigment, pigment-containing composition, and pigment-containing coated body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] (Example 1: red bright pigment)

[0073] · Preparation of gold colloidal solution

[0074] 100 g of chloroauric acid tetrahydrate (powder, Oura Precious Metals Co., Ltd., purity 99.0% or higher) was diluted with 480 g of water to prepare a 17.24 mass (wt)% chloroauric acid solution. Separately, a sodium citrate solution in which sodium citrate (manufactured by Nacalai Tesque) was diluted with pure water to 10% by weight was prepared. 2.00 g of a 17.24 wt % chloroauric acid solution and 994.99 g of pure water were put into a 1 L round-bottomed flask, and heated to reflux for 30 minutes while maintaining 100°C. Next, 3.01 g of a 10 wt % sodium citrate solution was poured into the round-bottomed flask, heated to reflux for 30 minutes while maintaining at 100° C., and then the round-bottomed flask was cooled to room temperature in water to obtain a gold colloidal solution. The primary particle diameter of the obtained gold microparticles (gold colloidal particles) was mea...

Embodiment 2

[0077] (Example 2: red bright pigment)

[0078] A bright red bright pigment was obtained in the same manner as in Example 1 except that 3060 g of the gold colloid solution produced in the same manner as in Example 1 was used.

Embodiment 3

[0079] (Embodiment 3: red bright pigment)

[0080] A bright red bright pigment was obtained in the same manner as in Example 1 except that 132 g of the gold colloid solution prepared in the same manner as in Example 1 was used.

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Abstract

The present invention provides a bright pigment comprising: flake glass, a titanium oxide film formed on the flake glass, and gold particles adhering to the titanium oxide film, wherein the gold particles include particles with a particle diameter of 20 nm or more and less than 50 nm. The number of gold particles P2 is 9 or more and less than 100 in a square area where one side is 2 μm on the surface of the titanium oxide film to which the gold particles are attached, and the number of gold particles P2 to the nearest gold particle is The average value of the distance of P2 is 130 nm or more and less than 500 nm.

Description

technical field [0001] The present invention relates to bright pigments, in particular to bright pigments comprising flake glass as a matrix, and more particularly to bright pigments using titanium oxide films and gold microparticles. The present invention also relates to a composition containing a bright pigment, and a coated body whose coating film contains the bright pigment. Background technique [0002] Brilliant pigments are added to products such as star-like particle-like reflections that add value, such as coatings for automobiles, inks for writing utensils, and cosmetics such as foundations and lipsticks. It is known that when the matrix of the bright pigment is made of glass flakes, excellent appearance such as a high brightness feeling and a clear particle feeling can be obtained. Bright pigments that realize various hues by utilizing the interference color produced by the titanium oxide film formed on the substrate are also on the market. [0003] In order to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C3/06B05D5/06B05D7/24C09C1/36C09C1/62
CPCB05D5/06B05D7/24C09C2200/1025C09C2200/502C01P2006/66C01P2006/65C09D5/29C09D5/22C09D7/62C08K2003/0831C08K9/02C08K7/14C08K2003/2241C09K11/58C09C1/0021C09C1/0015C09C1/0033C09C1/0078C09C2200/102C09C2200/302C09D7/70B05D5/067C01P2004/20C01P2004/80
Inventor 堀口治子
Owner NIPPON SHEET GLASS CO LTD