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. 22, 2014
Filed:
Apr. 21, 2005
Matthias Ganschow, Wiesbaden, DE;
Hans Joachim Metz, Darmstadt, DE;
Ulrike Rohr, Mannheim, DE;
Karl-heinz Schweikart, Eschborn, DE;
Katharina Landfester, Ulm, DE;
Matthias Ganschow, Wiesbaden, DE;
Hans Joachim Metz, Darmstadt, DE;
Ulrike Rohr, Mannheim, DE;
Karl-Heinz Schweikart, Eschborn, DE;
Katharina Landfester, Ulm, DE;
Clariant Finance (BVI) Limited, Tortola, VG;
Abstract
The invention relates to a method for production of an aqueous dispersion of polymer-encapsulated pigments characterized in that (a) an aqueous pigment dispersion, containing at least one organic pigment (P) at least one surfactant (T), and water is prepared,(b) a monomer miniemulsion stabilized by a hydrophobic organic compound with a water solubility at 20° C. of not more than 5×10g/l, is prepared from a polymerizable monomer (M) and at least one surfactant (T), in water, (c) a monomer pigment emulsion is prepared, whereby the aqueous pigment dispersion from (a) and the monomer miniemulsion from (b) are mixed and homogenized, and (d) the pigment-containing monomer miniemulsion from (c) is polymerized in the presence of a polymerization initiator and/or by heat, whereupon an encapsulation of the pigment with the polymer thus formed occurs.