Water-soluble partially saponified copolymers based on vinyl acetate and methyl acrylate and their use for delaying the polymerization of styrene

US4452949A · kind A · utility

Assignee

• BASF SE

Inventors

• Ernst Penning · Ludwigshafen, DE
• Bernd Stanger · Dudenhofen, DE
• Alfred Mueller · Nuremberg, DE

Key dates

• Filing date: Apr 26, 1982
• Grant date: Jun 5, 1984
• Expiry date: Apr 26, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F8/12
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

By emulsion polymerization of vinyl acetate, methylacrylate, acrylic acid, monoolefinically unsaturated sulfoalkyl esters or amides and vinyl sulfonate and partial saponification of the resultant copolymer emulsion, an aqueous solution of a copolymer is obtained which greatly delays the polymerization of styrene in aqueous media.