Preparation of copolymers of vinyl esters and monoethylenically unsaturated carboxylic acids and their use

US5773541A · kind A · utility

Assignee

• BASF SE

Inventors

• Dieter Boeckh · Schifferstadt, DE
• Axel Kistenmacher · Ludwigshafen, DE
• Walter Denzinger · Speyer, DE
• Iris Rau · Wiesbaden, DE
• Angelika Funhoff · Schriesheim, DE
• Richard Baur · Mutterstadt, DE
• Alexander Kud · Eppelsheim, DE
• Volker Schwendemann · Neustadt, DE

Key dates

• Filing date: Aug 21, 1996
• Grant date: Jun 30, 1998
• Expiry date: Aug 21, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D3/3769
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for preparing copolymers of vinyl esters and monoethylenically unsaturated carboxylic acids by free-radical copolymerization of PA1 (a) 20 to 80 mol % of vinyl esters of aliphatic monocarboxylic acids having at least 2 carbon atoms and PA1 (b) 80-20 mol % of monoethylenically unsaturated carboxylic acids, with or without PA1 (c) 0-30 mol % of other copolymerizable monoethylenically unsaturated monomers and/or PA1 (d) 0-10 mol % of monomers which contain at least two non-conjugated ethylenic double bonds in the molecule, in the presence of at least one sulfur, phosphorus and/or nitrogen compound with a reducing action and of 0.05-30% by weight, based on the monomers, of at least one surface-active agent in aqueous medium in the presence of initiators and in the presence or absence of regulators, and the use of the copolymers or of the copolymers which are obtainable therefrom by hydrolysis and/or oxidation and have vinyl alcohol units as additive to detergents and cleaners.