Patent · US Active

Modified vinylamine-containing polymers as additives in papermaking

US8604134B2 · kind B2 · utility

7Cited by

17References

9Claims

0Family size

Assignee

HERCULES LLC · US

Inventors

Qu-Ming Gu · Bear, US
Jonathan M. McKay · Wilmington, US
Richard J. Riehle · Wilmington, US

Key dates

Filing date	Jul 31, 2008
Grant date	Dec 10, 2013
Priority date	—
Expiry date	Jun 18, 2032

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21H21/18
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Vinylamine-containing polymers are disclosed where the amine groups are substituted with (1) cationic functional groups, (2) anionic functional groups, (3) hydrophobic functional groups, (4) hydrophilic functional groups, (5) functional groups that impart amphoteric characteristics to the polymers, or (6) combinations thereof. Also disclosed are processes for preparing such polymers, as well as compositions comprising such polymers. Among other applications, these polymers can be used in papermaking applications as dry strength additives, wet strength additives, retention aids, drainage aids, and pitch and stickies control agents.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.