Hydrogel encapsulations and methods of making the same
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Ceramic encapsulation with controlled layering by use of functionalized silanes
US9192548B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9192548-B2 |
| Application number | US-201113168715-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 24, 2011 |
| Priority date | Jun 25, 2010 |
| Publication date | Nov 24, 2015 |
| Grant date | Nov 24, 2015 |
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Abstract
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This invention relates to a method for forming hollow silica-based particles suitable for containing one or more active ingredients or for containing other smaller particles which may include one or more active ingredients. The method comprises preparing an emulsion including a continuous phase that is polar or non-polar and a dispersed phase comprising droplets including (i) a polar active ingredient when the continuous phase is non-polar or (ii) a non-polar active ingredient when the continuous phase is polar; and adding a silica precursor to the emulsion such that the silica precursor can be emulsion templated on the droplets to form hollow silica-based particles. The silica precursor has the general formula (I): R 1 x —Si—(OR 2 ) y , wherein R 1 is selected from substituted and unsubstituted alkyl, substituted and unsubstituted aryl, alcohols, amines, amides, aldehydes, acids, esters, and functional groups having an unsaturated carbon-carbon bond, R 2 is an alkyl group, x+y=4, and y=1, 2 or 3. The —OR 2 group is a hydrolyzable organic group that exhibits an ability to form a silicon-oxygen bond chain as a result of hydrolysis and condensation.
First claim
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What is claimed is: 1. A method for forming silica-based particles, the method comprising: (a) preparing an emulsion including a cationic polymer and having a continuous phase that is polar or nonpolar, and a dispersed phase comprising droplets including (i) one or more polar active ingredients when the continuous phase is non-polar or (ii) one or more non-polar active ingredients when the continuous phase is polar; (b) adding a first silica precursor to the emulsion such that…
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Human Necessities · mapped topic
Human Necessities · mapped topic
Human Necessities · mapped topic
- A61K8/11Primary
Human Necessities · mapped topic
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- What does patent US9192548B2 cover?
- This invention relates to a method for forming hollow silica-based particles suitable for containing one or more active ingredients or for containing other smaller particles which may include one or more active ingredients. The method comprises preparing an emulsion including a continuous phase that is polar or non-polar and a dispersed phase comprising droplets including (i) a polar active ing…
- Who is the assignee on this patent?
- Traynor Daniel H, Xu Hao, Traynor Henry G, and 5 more
- What technology area does this patent fall under?
- Primary CPC classification A61K8/11. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Tue Nov 24 2015 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).