Finely divided, cationic, aqueous polymer dispersions, method for the production thereof, and the use thereof

US10975525B2 · kind B2 · utility

Assignee

• Solenis Technologies, L.P. · CH

Inventors

• Carmen-Elena Cimpeanu · Ludwigshafen, DE
• Klaus Moeller · Oakville, CA
• Petra Arnold · Birkenau, DE
• Kristina Georgieva · Mannheim, DE
• Reinhold Dieing · Schifferstadt, DE
• Christian Jehn-Rendu · Orange, FR
• Quan Wen · Shanghai, CN

Key dates

• Filing date: Dec 1, 2016
• Grant date: Apr 13, 2021
• Expiry date: Jun 16, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2800/20
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Finely divided, cationic, aqueous polymer dispersion which is obtainable by emulsion polymerisation of ethylenically unsaturated monomers in an aqueous liquid containing a cationic prepolymer as a dispersant, wherein the cationic prepolymer is prepared in the presence of at least one polymerisation initiator by polymerisation of (a) from 15 to 45% by weight of at least one ethylenically unsaturated monomer comprising at least one quaternary ammonium group; (b) from 5 to 80% by weight of at least one optionally substituted styrene; (c) from 0 to 50% by weight of at least one C 1-12 alkyl (meth) acrylate; (d) from 0 to 10% by weight of at least one ethylenically unsaturated monomer comprising an acid group; (e) from 0 to 10% by weight of at least one ethylenically unsaturated monomer comprising an amine group; and (f) from 0 to 20% by weight of at least one non-ionic ethylenically unsaturated monomer differing from (b), (c) and (e), the sum of (a)+(b)+(c)+(d)+(e)+(f) being 100% by weight, in a first emulsion polymerisation in the presence of at least one non-ionic emulsifier, and thereafter, in the aqueous liquid containing the cationic prepolymer a second emulsion polymerisation is …