| 发明名称 |
Encapsulation of personal care actives |
| 摘要 |
Described are methods for encapsulating a personal care active, comprising preparing an aqueous phase, comprising partially hydrolyzed polyvinyl alcohol and a cosmetically acceptable non-ionic surfactant, preparing an oil phase, comprising the personal care active and isocyanate or polyisocyanate, homogenizing the aqueous phase and oil phase to form an emulsion with particles less than one micron, and forming a dispersion of polyurea core-shell particles containing the personal care active by contacting the emulsion with an aqueous amine solution. |
| 申请公布号 |
US9278055(B2) |
申请公布日期 |
2016.03.08 |
| 申请号 |
US201214352108 |
申请日期 |
2012.10.16 |
| 申请人 |
Dow Global Technologies LLC;Rohm and Haas Chemicals LLC |
发明人 |
Zeng Fanwen;Jones Charles;Routzahn Diane;Wilson Stephen L. |
| 分类号 |
A61K8/02;A61Q17/04;A61K8/84;A61K8/86;A61K8/11;B01J13/14;B01J13/16;A61K8/35 |
主分类号 |
A61K8/02 |
| 代理机构 |
|
代理人 |
Brant Edward L. |
| 主权项 |
1. A method for encapsulating a personal care active, comprising:
preparing an aqueous phase, comprising partially hydrolyzed polyvinyl alcohol and a cosmetically acceptable non-ionic surfactant; preparing an oil phase, comprising the personal care active and isocyanate or polyisocyanate; homogenizing the aqueous phase and oil phase to form an emulsion; and forming a dispersion of polyurea core-shell particles containing the personal care active by contacting the emulsion with an aqueous amine solution, wherein the polyurea core-shell particles have an average particle size in a range of from 100 nm to 0.49 micron. |
| 地址 |
Midland MI US |
