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Molecular Biology

Finely-divided-suspension-of-cellulosic-material

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Finely divided suspension of cellulosic material

Details

Inventors: Komuro, Yuuichi; Yamamoto, Katsuo;
Assignee: Asahi Kasei Kogyo K.K. (Osaka, JP)
Primary Examiner: Lieberman; Paul
Assistant Examiner: DiNunzio; M.
Attorney, Agent or Firm: Sughrue, Mion, Zinn Macpeak & Seas

A suspension comprising a dispersing medium containing at least 2% by weight of a fine particles of cellulosic material having a 50% cumulative volume diameter of from 0.3 to 6 .mu.m, wherein a cumulative volume ratio of those particles having a diameter of not more than 3 .mu.m is at least 25% is disclosed. The suspension is obtained by a process comprising subjecting a cellulosic material to a depolymerization pretreatment, followed by wet grinding in a container containing a grinding medium and equipped with a rotary blade for forced stirring of the medium. The suspension is excellent in viscosity, water retention properties, stability, and palatability.

DETAILED DESCRIPTION An object of this invention is to provide a suspension containing finely divided particles of a cellulosic material in high concentrations.
Another object of this invention is to provide a process for producing such a finely divided suspension.
As a result of extensive investigations, the present inventors have succeeded in obtaining a high concentration suspension of a cellulosic material which is finely divided in a qualitative manner which heretofore has never been achieved by the conventional techniques.
The present invention relates to a suspension comprising a dispersing medium containing at least 2% by weight of fine particles of a cellulosic material having a 50% cumulative volume diameter of from 0.
3 to 6 .
mu.
m, wherein a cumulative volume ratio of those particles having a diameter of not more than 3 .
mu.
m is at least 25%.
The present invention further relates to a process for producing a suspension of a finely divided cellulosic material, which comprises subjecting a cellulosic material to a depolymerization pretreatment, followed by wet grinding the depolymerized cellulosic material in a container containing a grinding medium and equipped with a rotary blade for forced stirring of the medium.

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