PROCESS FOR PRODUCING CELLULOSE DERIVATIVE WITH IMPROVED SOLUBILITY

Title:

PROCESS FOR PRODUCING CELLULOSE DERIVATIVE WITH IMPROVED SOLUBILITY

Document Type and Number:

WIPO Patent Application WO/2007/023513

Kind Code:

A1

Abstract:

A process for producing a cellulose derivative which has improved solubility and which, when dissolved in water, leaves an extremely small amount of a suspending matter remaining undissolved. The process for cellulose derivative production comprises depolymerizing a cellulose derivative to such a degree that the viscosity at 20°C of a 2 mass% aqueous solution of the resultant cellulose derivative is lower by at least 10% than that before the depolymerization. Thus, the resultant cellulose derivative can give aqueous solutions in which the amount of a suspending undissolved matter having poor solubility is smaller than in aqueous solutions of the cellulose derivative before the depolymerization. The depolymerization is conducted preferably with an acid, alkali, or enzyme.

Inventors:

HAYAKAWA KAZUHISA (JP)
NISHIYAMA YUICHI (JP)
ENDO TATSUO (JP)

Application Number:

PCT/JP2005/015191

Publication Date:

March 01, 2007

Filing Date:

August 22, 2005

Export Citation:

Click for automatic bibliography generation Help

Assignee:

SHINETSU CHEMICAL CO (JP)
HAYAKAWA KAZUHISA (JP)
NISHIYAMA YUICHI (JP)
ENDO TATSUO (JP)

International Classes:

C08B11/00; C12P19/04

Domestic Patent References:

WO2003018637A1	2003-03-06
WO2003018637A1	2003-03-06
WO2002081524A1	2002-10-17
WO2000032637A1	2000-06-08

Foreign References:

JP2005239845A	2005-09-08
JP2004526845A	2004-09-02
JP2002531594A	2002-09-24
JPS6225101A	1987-02-03
JPH02245002A	1990-09-28
JPH02245001A	1990-09-28
JP2001288201A	2001-10-16

Other References: