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. 28, 2014
Filed:
Jan. 20, 2012
Applicant:
Jonathan M. Mckay, Wilmington, DE (US);
Inventor:
Jonathan M. McKay, Wilmington, DE (US);
Assignee:
Hercules Incorporated, Wilmington, DE (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
D21H 17/37 (2006.01); D21H 17/44 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process is disclosed for the production of paper with enhanced dry strength comprising adding to the wet end of a paper machine, (a) a glyoxalated acrylamide-containing polymer and (b) a cationic aqueous dispersion polymer. Guidelines for the properties of the polymers that make this coadditive system effective are established. Polymer properties discussed include molecular weight, cationic charge, polymer composition and functionalization, and relative additive amounts.