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US 6,316,030 B1Granted
Use of nanoscale sterols and sterol esters
AssigneeCognis Deutschland GmbH & Co. KG
InventorsChristian Kropf, Thomas Foerster, Bernd Fabry, Martina Hollenbrock
Life of this patent
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Abstract
A composition containing an effective amount of nanoparticles selected from the group consisting of nanoscale sterols, nanoscale sterol esters, and mixtures thereof.
Claims17
A composition comprising an effective amount of nanoparticles selected from the group consisting of nanoscale sterols, nanoscale sterol esters, and mixtures thereof.
A process for making nanoscale sterols, and their ester derivatives, comprising:
- (a) providing a starting material selected from the group consisting of sterols, sterol esters, and mixtures thereof;
- (b) providing a solvent;
- (c) dissolving the starting material in the solvent under supercritical or near-critical conditions to form a fluid mixture;
- (d) expanding the fluid mixture through a nozzle and into a vacuum, gas or liquid;
- and
- (e) simultaneously evaporating the solvent from the fluid mixture as it expands, to form the nanoscale sterols and their ester derivatives.
3 more elements
A process for treating human skin or hair comprising:
- (a) providing a composition containing an effective amount of nanoparticles selected from the group consisting of nanoscale sterols, nanoscale sterol esters, and mixtures thereof;
- and
- (b) applying the composition onto human skin or hair.
Dependencies are inferred from the claim text.