Method for the production of functionalized partially hydrolyzed polyvinyl acetate

US11498988B2 · kind B2 · utility

Assignee

• Flint Group Germany GmbH · DE

Inventors

• Christian Pietsch · Offenburg, DE
• Thomas Telser · Weinheim, DE
• Caroline Hartmann · Karlsruhe, DE
• Uwe Krauss · Gossersweiler-Stein, DE
• Moritz Baier · Berlin, DE

Key dates

• Filing date: Nov 29, 2018
• Grant date: Nov 15, 2022
• Expiry date: Oct 9, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2331/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A method for the production of functionalized partially hydrolyzed polyvinyl acetate comprising vinyl alcohol, vinylacetate and functionalized vinyl alcohol units by reacting in a melt a partially hydrolyzed polyvinyl acetate as component A with a reactive compound carrying at least one ethylenically unsaturated group and at least one reactive group reactive with hydroxyl or acetate groups as component B, in the presence of at least one stabilizer as component C and in the presence of at least one catalyst selected from the group consisting of tertiary amines and nitrogen-containing heterocycles as component D, the method comprising the steps: feeding the components into a mixing device capable of heating, melting and mixing components A, B, C and D, heating, melting and mixing components A, B, C and D in the device to give a melt and reacting components A and B in the melt.