Sulfalkylation of hydroxyethylated polybenzimidazole polymers

US4997892A · kind A · utility

Assignee

• Hoechst Celanese Corporation · US

Inventors

• Michael J. Sansone · Berkeley Heights, US
• Balaram Gupta · North Plainfield, US
• Charles Forbes · Florham Park, US
• Mark S. Kwiatek · Union, US

Key dates

• Filing date: Nov 13, 1989
• Grant date: Mar 5, 1991
• Expiry date: Nov 13, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G73/18
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A sulfoalkyl derivative of N-substituted hydroxyethylated polybenzimidazole is disclosed, produced by the reaction of an N-substituted hydroxyethylated polybenzimidazole anion with a sultone. The N-substituted hydroxyethylated polybenzimidazole polymer is first reacted with an alkali hydride to produce the anion of N-substituted hydroxyethylated polybenzimidazole. The N-substituted hydroxyethylated polybenzimidazole anion is then reacted with the sultone to produce a sulfoalkyl derivative of the N-substituted hydroxyethylated polybenzimidazole polymer. These derivatives find great use as ion exchange devices.