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:
Jun. 01, 1999
Filed:
Mar. 31, 1998
Applicant:
Inventors:
Assignee:
Kerr-McGee Chemical LLC, Oklahoma City, OK (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09C / ;
U.S. Cl.
CPC ...
106437 ; 106417 ; 106418 ; 106423 ; 106429 ; 106436 ; 106438 ; 106442 ; 106445 ; 106446 ; 106447 ; 106448 ; 106449 ; 106460 ; 106465 ; 106471 ; 106475 ; 106490 ; 106491 ; 428403 ; 428404 ; 523200 ;
Abstract
A process for preparing a low-dusting, free-flowing pigment which has not been subjected to any micronizing treatment comprising the steps of providing an inorganic pigment material; providing a source of water; forming a fine, well dispersed slurry of the pigment and water; milling the slurry; depositing a treating agent having the formula ROOCCHSO.sub.3 MCH.sub.2 COOR' wherein R and R' are monovalent alkyl radicals having from about 2 to about 20 carbon atoms, and M is a metallic monovalent cation on the slurried milled pigment; and drying the pigment material having a treating agent deposited thereon. The invention also provides the free-flowing pigments produced by this process.