Patent · US Expired

Process for sizing paper

US7318881B2 · kind B2 · utility

1Cited by

25References

93Claims

0Family size

Assignee

AKZO NOBEL N.V. · NL

Inventors

Erik Lindgren · Bohus, SE
Sten Frolich · Mölndal, SE
Michael Persson · Mörbylånga, SE
Barbro Magnusson · Ytterby, SE

Key dates

Filing date	May 10, 2004
Grant date	Jan 15, 2008
Priority date	—
Expiry date	Nov 11, 2024

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21H21/16
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A process for sizing paper comprising adding to an aqueous suspension containing cellulosic fibers, and optional fillers, a sizing dispersion comprising a polymer having an aromatic group, and a sizing promoter comprising a polymer having an aromatic group, wherein the sizing dispersion and the sizing promoter are added separately to the aqueous suspension.

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