Continuous process for the synthesis of graft polymers based on polyethers

US9068023B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Faissal-Ali El-Toufaili · Ludwigshafen, DE
• Michaela Heussler · Haßloch, DE
• Christian Schwede · Weinheim, DE
• Aaron Flores-Figueroa · Mannheim, DE
• Rainer Dobrawa · Stuttgart, DE
• Dieter Boeckh · Schifferstadt, DE
• Wolfgang Loth · Bad Dürkheim, DE
• Gerd Konrad · Speyer, DE

Key dates

• Filing date: Mar 7, 2013
• Grant date: Jun 30, 2015
• Expiry date: Mar 9, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F283/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a continuous process for the preparation of amphiphilic graft polymers, wherein a vinyl ester component (B) composed of vinyl acetate and/or vinyl propionate (B1) and, if desired, a further ethylenically unsaturated monomer (B2), is polymerized in the presence of a polyalkylene oxide (A), a free radical-forming initiator (C) and, if desired, an additive (D), at a mean polymerization temperature at which the initiator (C) has a decomposition half-time of from 1 to 500 min, in at least one tubular reactor segment with a feed side and an outlet side, through which the reaction mixture comprising at least a part of component (A) to (C), and if desired (D), streams, a tubular reactor segment and the use of the inventive amphiphilic graft polymer. The invention further relates to an inventive amphiphilic graft polymer and the use thereof.