Sulfonated aliphatic compounds

US5919976A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Bin Lee · Dorpsstraat, US
• Harold Pielartzik · Krefeld, DE
• Gundolf Jacobs · Rösrath, DE

Key dates

• Filing date: Dec 8, 1997
• Grant date: Jul 6, 1999
• Expiry date: Dec 8, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C303/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for incorporating sulfonic acid groups in the structure of an aliphatic, non-polar, water insoluble compound is disclosed. In the process the compound is first dissolved in an appropriate solvent and is then reacted in the presence of a catalyst and oxygen with an aqueous sulfite solution. The sulfonation renders the compound polar and water absorbent and, therefore, suitable in a variety of applications.