The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 01, 2013
Filed:
Feb. 28, 2011
Torsten Gottschalk-gaudig, Mehring, DE;
Herbert Barthel, Emmertin, DE;
Bernard Paul Binks, Walkington, GB;
Tommy S. Horozov, Beverley, GB;
Torsten Gottschalk-Gaudig, Mehring, DE;
Herbert Barthel, Emmertin, DE;
Bernard Paul Binks, Walkington, GB;
Tommy S. Horozov, Beverley, GB;
Wacker Chemie AG, Munich, DE;
Abstract
The invention relates to water-in-oil (W/O) or oil-in-water (O/W) emulsions containing an oil phase of at least one water-insoluble constituent; an aqueous phase; pyrogenic silica at the oil-water interface, the pyrogenic silica partially silylated such that non-silylated surface silanol groups remaining are between 95% and 5% of initial silanol groups, the equivalent of 1.7 to 0.1 surface SiOH groups per nm, a surface energy gamma-s-D of 30 to 80 mJ/m, and a specific BET surface area between 30 and 500 m/g; and optionally other substances, such as pigments or preservatives. The inventive emulsions have a mean particle size of the dispersed phase, of between 0.5 μm and 500 μm, and are of low viscosity.