Low foaming paper surface sizing composition

US6310159A · kind A · utility

Assignee

• THE DOW CHEMICAL COMPANY · US

Inventors

• Jurgen Eiffler · Stade, DE
• Roger Carlsson · Skattkärr, SE
• Jürgen Hermanns · Nottensdorf, DE
• Stephen M. Oliver · Wollerau, CH

Key dates

• Filing date: Jan 19, 1999
• Grant date: Oct 30, 2001
• Expiry date: Jan 19, 2019

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21H17/43
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The present invention refers to a paper surface sizing composition comprising a copolymer having: PA1 a) structural units derived from ethylenically unsaturated hydrocarbons; PA2 structural units derived from monomers selected from esters of ethylenically unsaturated mono-carboxylic acids, half-esters of ethylenically unsaturated dicarboxylic acids, allylethers and vinylethers and mixtures thereof; optionally PA1 c) structural units derived from ethylenically unsaturated monomers selected from monocarboxylic acids as well as salts and amides thereof, dicarboxylic acids as well as salts, amides and half-amides thereof, and cyclic anhydrides and imides of dicarboxylic acids and mixtures thereof; and optionally PA1 d) structural units derived from alkyl or amino-substituted alkyl acrylates or methacrylates with the proviso, that if no structural units c) are present, the structural units b) are derived from monomers selected from half esters of ethylenically unsaturated dicarboxylic acids.