Aqueous pigment slurries for production of filler-containing paper

US5744001A · kind A · utility

Assignee

• BASF SE

Inventors

• Friedrich Linhart · Heidelberg, DE
• Dietmar Moench · Weinheim, DE
• Guenter Scherr · Ludwigshafen, DE
• Wolfgang Reuther · Neckargemünd, DE
• Primoz Lorencak · Ludwigshafen, DE

Key dates

• Filing date: Aug 23, 1995
• Grant date: Apr 28, 1998
• Expiry date: Aug 23, 2015

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21H17/56
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Aqueous pigment slurries which contain up to 80% by weight of a finely divided pigment in dispersed form and from 0.1 to 5% by weight of dispersants which are obtainable by reacting PA1 (a) polyalkylenepolyamines, polyamidoamines, polyamidoamines grafted with ethyleneimine, polyetheramines and mixtures of the stated compounds and PA1 (b) monoethylenically unsaturated carboxylic acids, salts, esters, amides or nitriles of monoethylenically unsaturated carboxylic acids, chlorocarboxylic acids and/or glycidyl compounds and, if required, PA1 (c) bifunctional or polyfunctional crosslinking agents which have a halohydrin, glycidyl, aziridine or isocyanate unit or a halogen atom as a functional group, to give water-soluble condensates which, in 20% strength by weight aqueous solution at 20.degree. C., have a viscosity of at least 100 mPa.s are prepared by milling or dispersing pigments in the presence of the dispersants and water and are used as additives to paper stock in the production of filler-containing paper.