Sulfonated and oxidized indene polymers

US5753775A · kind A · utility

Assignee

• BASF SE

Inventors

• Eberhard Beckmann · Neustadt, DE
• Stefan Erren · Kallstadt, DE
• Ulf Baus · Dossenheim, DE
• Norbert Zimmermann · Waldsee, DE
• Erich Kromm · Bad Dürkheim, DE
• Klaus Taeger · Freinsheim, DE
• Eva-Marie Borschel · Ludwigshafen, DE
• Willi Bury · Ludwigshafen, DE

Key dates

• Filing date: Jan 31, 1996
• Grant date: May 19, 1998
• Expiry date: Jan 31, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K23/12
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Sulfonated and oxidized indene polymers obtainable by PA0 (a) polymerization of indene or indene derivatives of the general formula I ##STR1## where R.sup.1 is hydrogen, methyl or ethyl and n is 1 or 2, or of mixtures which contain the compounds I as well as other copolymerizable and/or non-polymerizable organic compounds in an amount of at least 10% by weight, PA0 b) sulfonation of the polymer with a sulfonating agent at from 40.degree. to 130.degree. C., and PA0 c) non-chain-degrading oxidation of the polymer at from 80.degree. to 180.degree. C. These indene polymers are suitable for use as dispersants for example in dye and pigment preparations.