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:
Dec. 13, 2011
Filed:
May. 22, 2009
Marianne Creamer, Warrington, PA (US);
Robert Krasnansky, Le Rouret, FR;
Joseph Manna, Quakertown, PA (US);
Daniele Cristina Santos, Jacerei, BR;
Marianne Creamer, Warrington, PA (US);
Robert Krasnansky, Le Rouret, FR;
Joseph Manna, Quakertown, PA (US);
Daniele Cristina Santos, Jacerei, BR;
Rohm and Haas Company, Philadelphia, PA (US);
Abstract
The process of the present invention produces an aqueous dispersion of mineral materials, suitable for use in pigments and other coatings, by introducing a fully neutralized dispersing agent to an aqueous dispersion of coarse mineral materials, grinding the aqueous dispersion and, during grinding, adding a partially neutralized dispersing agent to the aqueous dispersion. The process of the present invention produces aqueous dispersions of very fine particles, having a solids content of at least 75% by weight, based on the total weight of the aqueous dispersion, and wherein 95% or more of the particles are below 2 microns.