Process for the production of hydantoins

US4465839A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Bernhard Schulte · Krefeld, DE
• Wolfgang Jakob · Moers, DE
• Willi Dunwald · Leverkusen, DE
• Karl-Heinrich Meyer · Krefeld, DE

Key dates

• Filing date: Nov 1, 1982
• Grant date: Aug 14, 1984
• Expiry date: Nov 1, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D233/76
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for the production of compounds containing at least one hydantoin ring by reacting a carbodiimide with derivatives of succinic acid anhydride corresponding to the following general formula: ##STR1## wherein R.sup.4 represents a halogen atom, an alkyl-carboxy or aryl-carboxy group; or with maleic acid anhydride in the presence of aromatic OH-functional compounds at temperatures of from about 20.degree. to about 250.degree. C., optionally in a solvent and optionally in the presence of a catalyst, and also to the use of the polyhydantoins obtained, where they have high molecular weights, as high temperature-resistant coating compositions, films, powders, adhesives, lacquers or mouldings.