Copolymers based on vinyl ethers and monoethylenically unsaturated dicarboxylic anhydrides, their preparation and their use

US5698649A · kind A · utility

Assignee

• BASF SE

Inventors

• Harald Meyer · Monsheim, DE
• Walter Denzinger · Speyer, DE
• Axel Sanner · Bischofswerda, DE
• Hans J. Richter · Marktoberdorf, DE
• Hans-Juergen Raubenheimer · Ketsch, DE
• Franz Frosch · Bad Dürkheim, DE

Key dates

• Filing date: May 13, 1996
• Grant date: Dec 16, 1997
• Expiry date: May 13, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F222/04
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Copolymers which contain a) from 2 to 50 mol % of vinyl alkyl ethers having 3 to 30 carbon atoms in the molecule, b) from 10 to 88 mol % of monoethylenically unsaturated dicarboxylic anhydrides and c) from 10 to 88 mol % of dialkyl esters of monoethylenically unsaturated dicarboxylic acids as typical monomer units in polymerized form are prepared by copolymerizing the monomers a), b) and c) at from 40.degree. to 180.degree. C. in the presence of free radical initiators and are used as film-forming resins in hair sprays and, in the form of the alkali metal, ammonium or alkaline earth metal salts, as thickeners for aqueous systems, such as cosmetic and pharmaceutical formulations, textile print pastes, liquid detergents and cleaning agents.