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Anti-uv emulsions stabilized with lignin and nanoparticles
US2018353395A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018353395-A1 |
| Application number | US-201615779840-A |
| Country | US |
| Kind code | A1 |
| Filing date | Nov 28, 2016 |
| Priority date | Nov 30, 2015 |
| Publication date | Dec 13, 2018 |
| Grant date | — |
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Abstract
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An “oil-in-water” emulsion comprising an aqueous phase, an oil phase, and an adsorption layer at the interface of the two phases, said adsorption layer consisting of a lignin matrix into which metal oxide nanoparticles are incorporated, characterised in that the lignin is present in a quantity of less than 2 wt. %, in particular in a quantity of between 0.5 wt. % and 2 wt. %, and in that the metal oxide nanoparticles are present in a quantity less than or equal to 1.5 wt. %, in particular in a quantity of between 0.5 wt. % and 1.5 wt. %, relative to the total weight of the emulsion.
First claim
Opening claim text (preview).
1 . An oil-in-water type emulsion comprising an aqueous phase, a fatty phase, and an adsorption layer at the interface of the two phases, wherein the adsorption layer consists of a lignin matrix in which are incorporated metal oxide nanoparticles, wherein the lignin is present in an amount less than or equal to 2% by weight, and that the metal oxide nanoparticles are present in an amount less than or equal to 1.5% by weight relative to the total weight of the emulsion. 2 . The emulsion according to claim 1 , wherein the metal oxide nanoparticles are zinc oxide particles or titanium dioxide particles. 3 . The emulsion according to claim 1 , wherein the metal oxide nanoparticles are bonded to the lignin matrix by non-covalent bonds. 4 . The emulsion according to claim 1 , wherein the metal oxide nanoparticles are incorporated into the lignin matrix by sonication. 5 . The emulsion according to claim 1 , wherein the metal oxide nanoparticles are bonded to the lignin matrix by covalent bonds. 6 . The emulsion according to claim 1 , wherein the metal oxide nanoparticles are present in a weight ratio of nanoparticles/lignin between 0.1 and 0.8. 7 . The emulsion according to claim 1 , wherein the lignin is of natural origin. 8 . The emulsion according to claim 7 , wherein the lignin is derived from a method for extracting cellulose from plants. 9 . The emulsion according to claim 1 , wherein the lignin is of synthetic origin. 10 . The emulsion according to claim 1 , wherein the fatty phase comprises an organic solvent selected from the group consisting of cyclopentane, hexane, methylcyclohexane, heptane, decane, dodecane and toluene.
Assignees
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Classifications
containing organic macromolecular compounds · CPC title
Nanosized, i.e. having sizes below 100 nm · CPC title
Titanium; Compounds thereof · CPC title
Zinc; Compounds thereof · CPC title
- A61K8/062Primary
Oil-in-water emulsions · CPC title
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- What does patent US2018353395A1 cover?
- An “oil-in-water” emulsion comprising an aqueous phase, an oil phase, and an adsorption layer at the interface of the two phases, said adsorption layer consisting of a lignin matrix into which metal oxide nanoparticles are incorporated, characterised in that the lignin is present in a quantity of less than 2 wt. %, in particular in a quantity of between 0.5 wt. % and 2 wt. %, and in that the me…
- Who is the assignee on this patent?
- Centre Nat Rech Scient, Univ Orleans
- What technology area does this patent fall under?
- Primary CPC classification A61K8/062. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Thu Dec 13 2018 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).