Liquid suspensions and powders of cerium oxide particles and preparation and polishing applications thereof
US-2015030650-A1 · Jan 29, 2015 · US
Liquid suspension of cerium oxide particles
US10344183B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10344183-B2 |
| Application number | US-201415104449-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 16, 2014 |
| Priority date | Dec 16, 2013 |
| Publication date | Jul 9, 2019 |
| Grant date | Jul 9, 2019 |
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- Title
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Abstract
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The present invention relates to a suspension of cerium oxide particles in a liquid phase, in which said particles comprise secondary particles comprising primary particles, and a process for preparing said liquid suspension in which the cerium IV/total cerium molar ratio before precipitation is comprised between 1/10000 and 1/500000 and that the thermal treatment is being carried out under an inert atmosphere.
First claim
Opening claim text (preview).
The invention claimed is: 1. A suspension of cerium oxide particles in a liquid phase, wherein said particles comprise secondary particles comprising primary particles, and wherein: the secondary particles have an average size D50 of between 105 and 1000 nm, with a standard deviation of between 10 and 50% of the average size of the secondary particles; and the primary particles have an average size D50 of between 100 and 300 nm, with a standard deviation of between 10 and 30% of the average size of the primary particles and wherein the primary particles have a BET specific surface area of between 3 and 10 m 2 /g. 2. The suspension according to claim 1 , wherein the secondary particles have an average size D50 of between 110 and 800 nm. 3. The suspension according to claim 1 , wherein the primary particles have an average size D50 of between 100 and 250 nm. 4. The suspension according to claim 1 , wherein the secondary particles have a dispersion index of at most 0.6. 5. The suspension according to claim 4 , wherein the secondary particles have a dispersion index of between 0.22 and 0.6. 6. The suspension according to claim 5 , wherein the secondary particles have a dispersion index of between 0.26 and 0.6. 7. The suspension according to claim 1 , wherein the liquid phase is at least one liquid selected from the group consisting of: water, water/water-miscible solvent mixture, and an organic solvent. 8. A cosmetic composition comprising the suspension according to claim 1 . 9. The cosmetic composition of claim 8 , which is an anti-UV cream.
Assignees
Inventors
Classifications
oxide or hydroxide being the only anion · CPC title
- C09K3/1454Primary
Abrasive powders, suspensions and pastes for polishing · CPC title
Agglomerated particles · CPC title
Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability · CPC title
Aqueous liquid suspensions · CPC title
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- What does patent US10344183B2 cover?
- The present invention relates to a suspension of cerium oxide particles in a liquid phase, in which said particles comprise secondary particles comprising primary particles, and a process for preparing said liquid suspension in which the cerium IV/total cerium molar ratio before precipitation is comprised between 1/10000 and 1/500000 and that the thermal treatment is being carried out under an …
- Who is the assignee on this patent?
- Rhodia Operations
- What technology area does this patent fall under?
- Primary CPC classification C09K3/1454. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jul 09 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).