Unlock instant, AI-driven research and patent intelligence for your innovation.

Bismuth sulfide particles, method for producing same, and use thereof

A technology of bismuth sulfide and particles, applied in chemical instruments and methods, bismuth compounds, inorganic chemistry, etc., can solve problems such as hidden dangers in human body and environmental safety, and achieve the effect of simple manufacturing

Pending Publication Date: 2022-05-13
ISHIHARA SANGYO KAISHA LTD
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pigments containing hexavalent chromium are designated as specific chemical substances, and there are risks in terms of safety for the human body and the environment

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Bismuth sulfide particles, method for producing same, and use thereof
  • Bismuth sulfide particles, method for producing same, and use thereof
  • Bismuth sulfide particles, method for producing same, and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0116] Pure water was added to the bismuth hydroxide obtained above so that the concentration was 0.08 mol / L, and 3.45 L of slurry was prepared. Separately, pure water was added to sodium thiosulfate (manufactured by Nacalaitesque Co., Ltd.) so as to have a concentration of 0.68 mol / L to prepare 1.98 L of a sodium thiosulfate mixed liquid. Next, add the sodium thiosulfate mixed solution into the bismuth hydroxide slurry. The S / Bi molar ratio at this mixing amount was 10. Among them, 150 g of nitric acid diluted to 30% was added. The pH of the mixed solution after the addition of nitric acid was 1.8. The resulting mixed solution was heated to 70° C. and stirred for 2 hours, and a black precipitate was obtained in the mixed solution. The black precipitate was collected by suction filtration, washed with pure water, and dried at 100° C. for 3 hours to obtain Sample 1 of Example 1. For the obtained sample 1, measure a * value and b * value, respectively a * =0.1,b * =-0.4....

Embodiment 2

[0118] Sample 2 was obtained in the same manner as in Example 1 except that the S / Bi molar ratio in Example 1 was changed to 5. For sample 2, measure a * value and b * value, respectively a * =0.1,b * = 1.2.

Embodiment 3

[0120] Sample 3 was obtained in the same manner as in Example 1 except that the S / Bi molar ratio in Example 1 was changed to 7.5. For sample 3 measure a * value and b * value, respectively a * =0.2,b * = -1.0.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Surface temperatureaaaaaaaaaa
Login to View More

Abstract

Provided are bismuth sulfide particles having high blackness. A bismuth sulfide particle having a high blackness such that the L * value in the L * a * b * color system is 22.0 or less, and having a high infrared reflectance such that the reflectance at a wavelength of 1200 nm is 30.0% or more. A bismuth compound and a sulfur compound are mixed in a water dispersion medium, the ratio of the number of moles of sulfur atoms to the number of moles of bismuth atoms (S / Bi molar ratio) is 3.5-20, and then heating is performed. The heating temperature is preferably from 30 DEG C to 145 DEG C (inclusive).

Description

technical field [0001] The present invention relates to bismuth sulfide particles, a method for producing them, and uses thereof, and in particular to an infrared reflective material containing the bismuth sulfide, a laser reflective material for LiDAR, a solvent composition, a resin composition, a coating composition, and a composition containing a coating composition. coating film. Background technique [0002] Chromium oxide is used in many existing black pigments, but when it is produced, a part of chromium is changed from trivalent to hexavalent, and it may become a pigment containing hexavalent chromium. Pigments containing hexavalent chromium are designated as specific chemical substances, which pose a risk of safety to the human body and the environment. [0003] For this reason, techniques for using bismuth sulfide, which is not specified as a specific chemical substance, as a black pigment have been studied. For example, Patent Document 1 describes the use of bis...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01G29/00C08K3/30C09D7/61C09D5/33G01S7/481G01S17/88
CPCC01G29/00C08K3/30C09D7/61C09D5/004G01S17/88G01S7/481C08K2003/3009C01P2006/62C01P2002/84C01P2002/82C09D201/00C09K3/00C08L101/00
Inventor 实藤宪彦
Owner ISHIHARA SANGYO KAISHA LTD