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US-9773931-B2 · Sep 26, 2017 · US
Anti-reflective coating on oxide particles for sunscreen applications
US10925819B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10925819-B2 |
| Application number | US-201715825795-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 29, 2017 |
| Priority date | Sep 3, 2015 |
| Publication date | Feb 23, 2021 |
| Grant date | Feb 23, 2021 |
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- Title
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Abstract
Official abstract text for this publication.
Zinc oxide compositions and methods for applying anti-reflective coating on oxide particles for sunscreen applications are provided herein. A composition includes multiple zinc oxide particles suspended within a medium forming sunscreen composition, and two or more coating materials applied to each of the multiple zinc oxide particles in distinct layers via a gradation based on refractive index, wherein each of the coating materials has a refractive index that is between the refractive index of air and the refractive index of zinc oxide, and wherein the two or more coating materials comprise one or more fluoropolymers and aluminum oxide.
First claim
Opening claim text (preview).
What is claimed is: 1. A composition comprising: multiple zinc oxide particles suspended within a medium forming sunscreen composition; and multiple coating materials comprising silicon dioxide, magnesium fluoride, multiple distinct fluoropolymers, aluminum oxide, and titanium dioxide, applied to the outside of each of the multiple zinc oxide particles in five distinct layers: a silicon dioxide layer, a magnesium fluoride layer, a layer of the multiple distinct fluoropolymers, an aluminum oxide layer, and a titanium dioxide layer, wherein the five distinct layers are applied to the outside of each of the multiple zinc oxide particles in an order corresponding to achieving a gradation of the refractive indices of the five distinct layers between that of zinc oxide and that of air. 2. The composition of claim 1 , wherein at least one of the multiple coating materials incorporates a textured surface. 3. The composition of claim 2 , wherein the at least one coating material incorporating a textured surface is the outermost layer applied to each of the multiple zinc oxide particles. 4. The composition of claim 2 , wherein the at least one coating material incorporating a textured surface is the innermost layer applied to each of the multiple zinc oxide particles. 5. The composition of claim 1 , wherein at least one of the multiple coating materials comprises a dense coating material, wherein a dense coating material comprises a solid coating material containing no voids.
Assignees
Inventors
Classifications
Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations · CPC title
Particles consisting of a mixture of two or more inorganic phases · CPC title
one phase coated with the other · CPC title
Silicon; Compounds thereof · CPC title
by inorganic compounds · CPC title
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Frequently asked questions
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- What does patent US10925819B2 cover?
- Zinc oxide compositions and methods for applying anti-reflective coating on oxide particles for sunscreen applications are provided herein. A composition includes multiple zinc oxide particles suspended within a medium forming sunscreen composition, and two or more coating materials applied to each of the multiple zinc oxide particles in distinct layers via a gradation based on refractive index…
- Who is the assignee on this patent?
- IBM
- What technology area does this patent fall under?
- Primary CPC classification A61K8/27. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Tue Feb 23 2021 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 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).