Uv protectant formulations
US-2024074949-A1 · Mar 7, 2024 · US
Titanium dioxide coloring particles, method for producing the same, and titanium dioxide particle mixture
US2023286823A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2023286823-A1 |
| Application number | US-202118015411-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jul 30, 2021 |
| Priority date | Jul 31, 2020 |
| Publication date | Sep 14, 2023 |
| Grant date | — |
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- Title
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Abstract
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An object of the invention is to provide titanium dioxide coloring particles capable of developing colors other than red and yellow while maintaining non-toxicity of titanium dioxide and a titanium dioxide particle mixture containing the titanium dioxide coloring particles, and to provide a method capable of producing the titanium dioxide coloring particles exhibiting the excellent properties by a simple process with a small environmental load. The invention relates to titanium dioxide coloring particles having a brookite type or rutile type crystal structure and co-doped with at least nitrogen and boron, a titanium dioxide particle mixture containing the titanium dioxide coloring particles, and a method for producing the titanium dioxide coloring particles in which a hydrothermal reaction of titanium diboride is caused in presence of an acid or urea, and then a nitriding treatment is performed in an ammonia gas atmosphere or by mixing with urea or carbon nitride.
First claim
Opening claim text (preview).
1 - 6 . (canceled) 7 . Titanium dioxide coloring particles that have a brookite type or rutile type crystal structure and are co-doped with at least nitrogen and boron. 8 . The titanium dioxide coloring particles according to claim 7 , which have a lattice defect. 9 . A titanium dioxide particle mixture comprising at least one type of the titanium dioxide coloring particles according to claim 7 . 10 . A titanium dioxide particle mixture comprising at least one type of the titanium dioxide coloring particles according to claim 8 . 11 . A method for producing titanium dioxide coloring particles, the method comprising: causing a hydrothermal reaction of titanium diboride in presence of an acid or urea, and then performing a nitriding treatment in an ammonia gas atmosphere or by mixing with urea or carbon nitride, wherein the titanium dioxide coloring particles have a brookite type or rutile type crystal structure and are co-doped with at least nitrogen and boron. 12 . The method for producing titanium dioxide coloring particles according to claim 11 , wherein a temporary calcination treatment is performed in an inert gas or a vacuum between the hydrothermal reaction and the nitriding treatment or after the nitriding treatment; and wherein the titanium dioxide coloring particles have a lattice defect. 13 . The method for producing titanium dioxide coloring particles according to claim 11 , wherein a temporary calcination treatment is performed simultaneously with the nitriding treatment; and wherein the titanium dioxide coloring particles have a lattice defect.
Assignees
Inventors
Classifications
- A61K8/29Primary
Titanium; Compounds thereof · CPC title
Preparations containing skin colorants, e.g. pigments (preparations in powder form A61Q1/12) · CPC title
Corresponding aspects not provided for by any of codes A61K2800/81 - A61K2800/95 · CPC title
Titanium dioxide · CPC title
Three-dimensional structures · CPC title
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- What does patent US2023286823A1 cover?
- An object of the invention is to provide titanium dioxide coloring particles capable of developing colors other than red and yellow while maintaining non-toxicity of titanium dioxide and a titanium dioxide particle mixture containing the titanium dioxide coloring particles, and to provide a method capable of producing the titanium dioxide coloring particles exhibiting the excellent properties b…
- Who is the assignee on this patent?
- Univ Tohoku
- What technology area does this patent fall under?
- Primary CPC classification A61K8/29. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Thu Sep 14 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).