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:
May. 21, 2013
Filed:
Apr. 07, 2011
Stable and aqueous compositions of polyvinylamines with cationic starch, and utility for papermaking
Applicants:
Frank J. Sutman, Wilmington, DE (US);
Christopher P. Dilkus, Woodlyne, NJ (US);
Qu-ming Gu, Bear, DE (US);
Inventors:
Frank J. Sutman, Wilmington, DE (US);
Christopher P. Dilkus, Woodlyne, NJ (US);
Qu-Ming Gu, Bear, DE (US);
Assignee:
Hercules Incorporated, Wilmington, DE (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D21H 17/28 (2006.01); D21H 17/45 (2006.01); D21H 21/02 (2006.01); D21H 21/10 (2006.01); D21H 21/18 (2006.01); C08L 3/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A stable aqueous composition comprising polyvinylamine and liquid cationic starch in a ratio of from 90 to 55 parts of polyvinylamine on active basis to 10 to 45 parts of liquid cationic starch on active basis is disclosed. The composition can be used in papermaking as a strength or as a drainage aid.