Fanwen Zeng,Charles Jones,Diane Routzahn,Stephen L. Wilson
申请号：
US14352108
公开号：
US09278055B2
申请日:
2012.10.16
申请国别(地区):
US
年份:
2016
代理人:
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.
