Process for preparation of .alpha., .beta.-unsaturated N-substituted-carboxylic acid amides

US4408073A · kind A · utility

Assignee

• Chemische Fabrik Stockhausen & Cie · DE

Inventors

• Bernhard Goossens · Velbert, DE
• Erich Kuster · Krefeld, DE
• Kurt Dahmen · Rheydt, DE
• Eduard Barthell · Krefeld, DE

Key dates

• Filing date: Dec 26, 1979
• Grant date: Oct 4, 1983
• Expiry date: Dec 26, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10M2217/06
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for the preparation of .alpha., .beta.-unsaturated N-substituted carboxylic acid amides, novel .alpha., .beta.-unsaturated N-substituted carboxylic acid amides, a process for the polymerization of these novel .alpha., .beta.-unsaturated N-substituted carboxylic acid amides, including the polymers, and the use of these polymers as sedimentation, flocculating, dewatering and retention aids, as additives for mineral oils, and as ion exchangers. The .alpha., .beta.-unsaturated N-substituted carboxylic acid amides are prepared by transamidation of .beta.-hydroxy or .beta.-alkoxy carboxylic acid amides with primary amines and heating of the N-substituted .beta.-hydroxy or .beta.-alkoxy carboxylic acid amides obtained as intermediate products in the vapor phase in the presence of catalysts. Primary amines are preferably used in the conversion which have no hydrogen beta to the amino group. These .alpha.,.beta.-unsaturated carboxylic acid amides may be neutralized and/or quaternized and polymerized by processes which as such are known alone or with other comonomers, and preferably acrylic or methacrylic acid derivatives such as acrylamide, to give cationi…