Unilever Home and Personal Care Usa, Division of Conopco, Inc.

University of Cincinnati

Carlos Co

Alexander Lips

Dan Wu

Chia-Chi Ho

Lei Huang

Charles Scott

A process for the encapsulation of liquid particles within nanometer thick polymer shells utilizes an interfacial free radical alternating copolymerization process. Encapsulating a liquid material includes providing a mixture comprising the liquid material to be encapsulated, a hydrophobic monomer in a non-polar solution and a hydrophilic monomer in a polar solution. The liquid material is compatible in either the polar solution or the non-polar solution. The polar solution and the non-polar solution are not miscible in each other. The mixture is homogenized to form an emulsion, and then polymerized by an initiator which initiates an interfacial free radical alternating copolymerization process. The copolymerization process is optimally constrained to proceed only at the hydrophobic and hydrophilic interface thus forming a polymer around the liquid material.

Liquid core capsules and methods of synthesis thereof through interfacial polymerization

A combination of a non-ionic tri-block poly-propylene-oxide, poly-ethylene-oxide alcohol ether surfactant coupled with block polymer poly(Butadiene-b-Ethylene Oxide) is an excellent surfactant phase to micro-emulsify sebum on contact. A method of micro-emulsification of sebum on contact with inventive compositions according to the present invention will form micro-emulsions which can enhance (1) deep pore cleansing of skin and (2) delivery of skin benefit actives into the skin.

Skin care cosmetic compositions and methods for microemulsification of sebum on contact

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Cincinnati, OH, United States of America

Carlos Co