Cholesterol ester clathrate, water-holding composition, hydrous compositions, cosmetics containing the same, and process for the preparation thereof

A process for the preparation of a cholesterol ester clathrate comprising the steps of:

• mixing and stirring a cholesterol ester with a hydroxyalkylated cyclodextrin to form said cholesterol ester clathrate.

A process for the preparation of a hydrous composition comprising the steps of:

• stirring and mixing a hydroxyalkylated cyclodextrin with a cholesterol ester to form a cholesterol ester clathrate;
• and
• adding water to said cholesterol ester clathrate to form said hydrous composition.

A process for the preparation of a hydrous composition comprising the steps of:

• stirring and mixing a cholesterol ester, a hydroxyalkylated cyclodextrin and water to form said hydrous composition.

A process for the preparation of a hydrous composition comprising the steps of:

• stirring and mixing a hydroxyalkylated cyclodextrin with water and at least one hydrous stabilizer, wherein said hydrous stabilizer is selected from the group consisting of alkylated polysiloxane polyethyleneglycol copolymer, alkylated silicated anhydrous silicate, alkyl-modified silicone resin coated powder, glyceryl-modified silicone resin coated powder and dextrin fatty acid ester;
• and
• admixing a cholesterol ester.

A process for the preparation of a hydrous composition comprising the steps of:

• mixing and stirring a hydroxyalkylated cyclodextrin, a cholesterol ester, a clay mineral and water.