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:
Apr. 24, 2012
Filed:
Oct. 17, 2007
Marc Rudolf Jung, Worms, DE;
Dieter Niederberger, Ludwigshafen, DE;
Hans Willax, Maxdorf, DE;
Hans-peter Hentze, Mannheim, DE;
Marc Rudolf Jung, Worms, DE;
Dieter Niederberger, Ludwigshafen, DE;
Hans Willax, Maxdorf, DE;
Hans-Peter Hentze, Mannheim, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
The invention described herein relates to a method of preparing microcapsules comprising a capsule core, a polymeric capsule wall and also, disposed on the outer surface of the capsule wall, a polyelectrolyte having an average molecular weight in the range from 500 g/mol to 10 million g/mol, the polymeric capsule wall being formed from specified monomers, where the microcapsules have an average particle size of 1.5-2.5 μm and 90% of the particles have a particle size ≦4 μm, by microencapsulating a capsule core with a polymeric capsule wall and then contacting the polymeric capsule wall with one or more polyelectrolytes in water or an aqueous medium.