Selective imidazole ion exchange resins

US4401629A · kind A · utility

Assignee

• National Institute for Metallurgy · ZA

Inventors

• Robert D. Hancock · Longview, US
• Brian R. Green · Roodepoort, ZA

Key dates

• Filing date: Mar 10, 1981
• Grant date: Aug 30, 1983
• Expiry date: Mar 10, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F26/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A polymeric ion exchange resin of the cross-linked type in which the active groups may be constituted either wholly or in part by an imidazole group which is, in turn, attached directly to a cross-linked, polymerized vinyl backbone. The optional substituents on the imidazole ring include optionally substituted pyridyl, imidazolyl or amino groups which can be substantially known type. A method of preparation of such resins includes the provision of at least the imidazole ring on the vinyl monomer before polymerization thereof. The active groups may be added or modified after polymerization with a cross-linking agent.