Patent · US Active

Method for producing high dry strength paper, paperboard or cardboard

US8349134B2 · kind B2 · utility

11Cited by

7References

17Claims

0Family size

Assignee

BASF SE

Inventors

Anton Esser · Mannheim, DE
Hans-Joachim Haehnle · Neustadt, DE
Martin Ruebenacker · Altrip, DE
Norbert Schall · Langenpreising, DE
Jacques Dupuis · Ludwigshafen, DE
Josef Neutzner · Neustadt, DE
Manfred Niessner · Schifferstadt, DE
Berthold Sturm · Worms, DE

Key dates

Filing date	Nov 21, 2005
Grant date	Jan 8, 2013
Priority date	—
Expiry date	Dec 10, 2027

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21H17/56
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The invention relates to a process for producing paper, board and cardboard of high dry strength by separately adding a polymer comprising vinylamine units and a polymeric anionic compound to a paper pulp, dewatering the pulp and drying the paper products, which comprises using as polymeric anionic compound at least one copolymer obtainable by copolymerizing

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