Process for producing a crosslinked cellulose ether

US12291582B2 · kind B2 · utility

Assignee

• DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

• Alexandra Hild · Soltau, DE
• Joerg Neubauer · Rheydt, DE
• Sonja Menz · Brelingen, DE
• Matthias Sprehe · Walsrode, DE
• Michael Schreck · Frankfurt, DE

Key dates

• Filing date: Apr 17, 2020
• Grant date: May 6, 2025
• Expiry date: Mar 4, 2042

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08B11/08
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A process for producing a crosslinked cellulose ether including the steps of (i) contacting at least one cellulose material with a mixture comprising (ia) at least one crosslinking agent and (ib) at least one alkalization reagent to form an activated cellulose material; and (ii) contacting the activated cellulose material of step (i) with at least one etherification reagent; wherein the at least one etherification reagent reacts with the activated cellulose material to form the crosslinked cellulose ether; and a crosslinked cellulose ether produced by the above process.