Preparation of emulsifier-free aqueous polymer emulsions

US5889101A · kind A · utility

Assignee

• BASF SE

Inventors

• Bernhard Schlarb · Ludwigshafen, DE
• Eberhard Schupp · Schwetzingen, DE
• Maria Gyopar Rau · Haßloch, DE
• Gunther Schulz · Bad Dürkheim, DE
• Harm Wiese · Heidelberg, DE

Key dates

• Filing date: Feb 6, 1996
• Grant date: Mar 30, 1999
• Expiry date: Feb 6, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F220/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An aqueous polymer emulsion obtainable by free radical polymerization of monomers in aqueous emulsion in the presence of a polymeric protective colloid contains, as components, PA1 from 5 to 50% by weight of at least one ethylenically unsaturated monomer having at least one acid or acid anhydride group (monomers I), PA1 from 0.1 to 80% by weight of at least one (meth)acrylate of an aliphatic alcohol of at least 10 carbon atoms (monomers II), PA1 from 0 to 94.9% by weight of main monomers selected from the group consisting of C.sub.1 -C.sub.8 -alkyl (meth)acrylates, vinyl esters of carboxylic acids of up to 20 carbon atoms, vinyl aromatics of up to 20 carbon atoms, ethylenically unsaturated nitriles, vinyl halides and aliphatic hydrocarbons having 2 to 8 carbon atoms and 1 or 2 double bonds (monomers III) and PA1 from 0 to 60% by weight of further monomers (monomers IV), the stated weights being based on the polymeric protective colloid.