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. 31, 2017
Filed:
Dec. 22, 2011
Applicants:
Matthias Buri, Rothrist, CH;
Samuel Rentsch, Aarburg, CH;
Claudia Pudack, Zürich, CH;
Inventors:
Assignee:
Omya International AG, Oftringen, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K 3/26 (2006.01); C08K 3/00 (2006.01); C09C 1/02 (2006.01); C09C 1/36 (2006.01); C09C 1/40 (2006.01); C09C 1/42 (2006.01); C09C 3/10 (2006.01); D21H 17/00 (2006.01); G01N 21/25 (2006.01); C08L 33/02 (2006.01); G06K 9/62 (2006.01);
U.S. Cl.
CPC ...
C08K 3/0033 (2013.01); C08K 3/26 (2013.01); C08L 33/02 (2013.01); C09C 1/021 (2013.01); C09C 1/3676 (2013.01); C09C 1/405 (2013.01); C09C 1/407 (2013.01); C09C 1/42 (2013.01); C09C 3/10 (2013.01); D21H 17/00 (2013.01); G01N 21/25 (2013.01); G06K 9/6202 (2013.01); C01P 2004/62 (2013.01); C01P 2006/12 (2013.01); C01P 2006/60 (2013.01); C01P 2006/62 (2013.01); C08K 2003/265 (2013.01);
Abstract
The present invention is directed to a process for surface whitening mineral matter in a slurry that includes the following steps: (a) preparing by dispersing and/or grinding at least one water based mineral matter slurry; and (b) adding during and/or after step a) 0.005 wt % to 0.5 wt %, based on dry weight of the mineral matter, of at least one alkylene oxide block co-polymer or at least one alkylene oxide random co-polymer.