Verfahren zur Herstellung von Celluloseether mit Geringem Polymerisierungsgrad

Details

Veröffentlichungs-Nr.

EP3305814

Aktenzeichen

EP17194397

Anmeldetag

2. Oktober 2017

Veröffentlichung

24. April 2019

Erteilung

24. April 2019

Rechtsraum

EP

IPC

C08B11/02C08J3/28

Abstract

There is provided a method for producing a low polymerization degree cellulose ether having a less yellowish appearance and having excellent long-term storage stability through depolymerization of a high polymerization degree cellulose ether with an acid and without requiring an additive other than the acid. More specifically, there is provided a method for producing a low polymerization degree cellulose ether, including a step of depolymerizing a high polymerization degree cellulose ether with an acid to obtain a low polymerization degree cellulose ether mixture and a step of neutralizing the acid present in the low polymerization degree cellulose ether mixture, wherein ultraviolet is applied in the step of depolymerizing or between the steps of depolymerizing and neutralizing.

Anmelder

Firma

Shin-Etsu Chemical Co., Ltd.

Land

🇯🇵 Japan

Fachgebiete