The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 20, 2023
Filed:
Mar. 27, 2018
Jgc Catalysts and Chemicals Ltd., Kawasaki, JP;
Jun Yamaguchi, Kitakyushu, JP;
Takumi Miyazaki, Kitakyushu, JP;
Ryo Muraguchi, Kitakyushu, JP;
Tatsuya Uehara, Kitakyushu, JP;
JGC Catalysts and Chemicals Ltd., Kawasaki, JP;
Abstract
Provided are titanium oxide fine particles which are excellent in transparency and are less photocatalytically active while maintaining a high refractive index, a dispersion of such fine particles, and a method for producing such a dispersion. The method for producing a dispersion of iron-containing rutile titanium oxide fine particles including a step (1) of neutralizing an aqueous metal mineral acid salt solution containing Ti and Fe in FeO/(TiO+FeO)=0.001 to 0.010 to form an iron-containing hydrous titanic acid; a step (2) of adding an aqueous hydrogen peroxide solution to form an aqueous solution of iron-containing peroxotitanic acid having an average particle size of 15 to 50 nm; a step (3) of adding a tin compound so as to satisfy TiO/SnO=6 to 16; a step (4) of adding a sol of silica-based fine particles which contain Si and a metal element M in SiO/MO=99.9/0.1 to 80/20, the addition being made so as to satisfy SiO/(oxides of the other elements)=0.08 to 0.22; and a step (5) of hydrothermally treating the solution obtained in the step (4).