Branched polyesters with sulfonate groups

US8901066B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Monika Haberecht · Ludwigshafen, DE
• Juergen Detering · Schifferstadt, DE
• Bernd Bruchmann · Ludwigshafen, DE
• Helmut Witteler · Monsheim, DE
• Heike Weber · Mannheim, DE
• Karl Kolter · Ludwigshafen am Rhein, DE

Key dates

• Filing date: Jun 13, 2012
• Grant date: Dec 2, 2014
• Expiry date: Jun 13, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D3/378
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Branched polyesters with sulfonate groups can be obtained by reacting components A, B, optionally C, and optionally D to yield branched polyesters, then reacting these branched polyesters with hydrogen sulfite. Component A is at least one α,β-olefinically unsaturated dicarboxylic acid, component B is at least one di- or higher-functional alcohol, optional component C is at least one di- or higher-functional carboxylic acid or hydroxycarboxylic acid without an α,β-olefinically unsaturated bond, and optional component D is at least one compound of formula CH3(—O—CH2—CH2)n—OH. In reacting the branched polyesters with hydrogen sulfite, a molar amount of hydrogen sulfite is at most 95 mol %, based on an amount of α,β-olefinically unsaturated dicarboxylic acid.