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. 21, 2020
Filed:
Jun. 26, 2018
Applicant:
Kemira Oyj, Helsinki, FI;
Inventors:
Assignee:
Kemira Oyj, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C11D 11/00 (2006.01); D21F 3/02 (2006.01); D21H 17/55 (2006.01); D21H 21/20 (2006.01); C11D 3/20 (2006.01); C11D 3/04 (2006.01); D21H 21/02 (2006.01);
U.S. Cl.
CPC ...
C11D 11/0041 (2013.01); C11D 3/046 (2013.01); C11D 3/2068 (2013.01); C11D 3/2086 (2013.01); D21F 3/02 (2013.01); D21H 21/02 (2013.01); D21H 17/55 (2013.01); D21H 21/20 (2013.01);
Abstract
Compositions and methods for cleaning wet strength resin contamination from papermaking equipment and/or for preventing wet strength resins from contaminating papermaking equipment using the compositions are disclosed. The compositions comprise an aqueous solution of a weak organic acid; a surfactant, preferably a nonionic surfactant, a divalent metal ion containing catalyst and optionally a glycol ether containing solvent.