Cosmetic assembly including a poured product
US-2016324758-A1 · Nov 10, 2016 · US
Nano-sized melanin particles and method of producing same
US8937149B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8937149-B2 |
| Application number | US-201013503521-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 22, 2010 |
| Priority date | Oct 23, 2009 |
| Publication date | Jan 20, 2015 |
| Grant date | Jan 20, 2015 |
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Abstract
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The present invention provides nano-sized particles of melanin, and the method for formation of the melanin particles comprise the following steps: adding a base to a dopamine.H + X − -containing solution (wherein H + X − is an acid) and allowing an acid-base neutralization reaction; and forming nano-sized particles of melanin by controlling the addition of nucleic dopamine.H + X − (a) to base (b) at a ratio of a:b=1:0.1-1, and allow concurrent or consecutive formation of melanin by oxidation curing of the dopamine in air (polymerization). The manufacturing method according to the present invention can produce nano-sized melanin particles in a short period of time. Furthermore, the nano-sized melanin particles made according to the present invention are distinctive from conventional solvents containing dispersions of natural melanin and synthetic melanin, and have excellent application in various fields.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for preparing melanin particles, comprising: adding a base to an aqueous solution containing dopamine.H + X − , wherein H + X − is an acid to allow an acid-base neutralization reaction; and forming melanins by oxidative polymerization of the said dopamine in air concurrently or consecutively, wherein upon addition of the base, a molar ratio of dopamine.H + X − (a) and base (b) is controlled at a ratio of a:b=1:0.1-1 so as to prepare nano-sized…
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Classifications
Human Necessities · mapped topic
Chemistry & Metallurgy · mapped topic
- A61K8/72Primary
Human Necessities · mapped topic
Human Necessities · mapped topic
Chemistry & Metallurgy · mapped topic
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Frequently asked questions
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- What does patent US8937149B2 cover?
- The present invention provides nano-sized particles of melanin, and the method for formation of the melanin particles comprise the following steps: adding a base to a dopamine.H + X − -containing solution (wherein H + X − is an acid) and allowing an acid-base neutralization reaction; and forming nano-sized particles of melanin by controlling the addition of nucleic dopamine.H + X − (a) to bas…
- Who is the assignee on this patent?
- Lee Jin Kyu, Ju Kuk Youn, Snu R&Db Foundation
- What technology area does this patent fall under?
- Primary CPC classification A61K8/72. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Tue Jan 20 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).