Patent · US Expired

Wet strength agent and method for production thereof

US6702923B1 · kind B1 · utility

11Cited by

21References

11Claims

0Family size

Assignee

AKZO NOBEL N.V. · NL

Inventors

Marek Gorzynski · Düren, DE
Christian Biermann · Bakum, DE
Heribert J. Macherey · Kreuzau, DE
Arne Andersson · Mölnlycke, SE

Key dates

Filing date	Nov 15, 2000
Grant date	Mar 9, 2004
Priority date	—
Expiry date	Nov 19, 2020

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21H17/55
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A method for preparing a wet strength agent comprising a first step of reacting a nitrogen-containing polymer with a hydrophobic compound to form hydrophobic side-chain substituents on the polymer, a second step of reacting the hydrophobised nitrogen-containing polymer obtained with a crosslinker to form a cationic nitrogen-containing resin, and a third step comprising forming of particles by emulsion polymerisation of one or more ethylenically unsaturated monomers in the presence of the wet strength resin formed. The invention further relates to a wet strength agent and resin. It further relates to the use of said agent and resin in cellulosic suspensions, the production of paper, preferably tissue paper, and paper, preferably tissue paper comprising a wet strength resin or agent.

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