Polymer-pigment hybrids for use in papermaking

US8343312B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Norbert Mahr · Schifferstadt, DE
• Dieter Meck · Freinsheim, DE
• Rainer Blum · Ludwigshafen, DE
• Ralf Hemel · Lampertheim, DE
• Norbert Gispert · Lahnstein, DE
• Juergen Schmidt-Thuemmes · Schifferstadt, DE
• Christoph Hamers · Ludwigshafen, DE

Key dates

• Filing date: May 24, 2006
• Grant date: Jan 1, 2013
• Expiry date: May 27, 2028

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21H17/675
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Process for the production of filler-containing papers and filler-containing paper products by addition of an aqueous suspension of at least one finely divided polymer-pigment hybrid to a paper stock and drainage of the paper stock with sheet formation, the polymer-pigment hybrid being obtainable by milling an aqueous suspension of at least one inorganic pigment in the presence of at least one binder and, if appropriate, by drying the aqueous suspension thus obtainable and redispersing the dried polymer-pigment hybrid in water, and the use of the polymer-pigment hybrids thus obtainable as a filler for the production of filler-containing paper or filler-containing paper products.