Title:
セルローストリアセテート及びその製造方法
Document Type and Number:
Japanese Patent JP4509239
Kind Code:
B2
Abstract:
There is provided a cellulose triacetate having an occlusion constant (K) of 70 or less, determined by the following method:
Method:
the cellulose triacetate is dissolved in a solvent mixture of methylene chloride/methanol (=9/1 w/w) to form a 16% by weight (as solid concentration) solution, which is then filtered under a constant pressure at the filtration pressure of 3 kg/cm 2 and the temperature of 25°C using a muslin filter to determine a filtered volume with the lapse of time, from which the slope of a linear curve represented by t/V-t (wherein t is a filtration time (sec) and V is a filtered volume (ml)) is calculated to obtain an occlusion constant (K) where K=slope x 2 x10 4 .
More Like This:
Inventors:
Toru Ozaki
Hiroshi Ogawa
Hirofumi Sasai
Hiroshi Ogawa
Hirofumi Sasai
Application Number:
JP32916598A
Publication Date:
July 21, 2010
Filing Date:
November 19, 1998
Export Citation:
Assignee:
Daicel Chemical Industry Co., Ltd.
International Classes:
C08B3/24; C08B3/06; D01F2/28
Domestic Patent References:
| JP9188701A | ||||
| JP8337601A | ||||
| JP9286801A | ||||
| JP10036401A | ||||
| JP10045802A | ||||
| JP10045801A | ||||
| JP9268201A | ||||
| JP6157602A | ||||
| JP9272701A | ||||
| JP6157601A |
Foreign References:
| WO1998001497A1 |
Attorney, Agent or Firm:
Satoshi Furuya
Takahiko Mizobe
Shinji Mochida
Yoshitsune Kazumasa
Takahiko Mizobe
Shinji Mochida
Yoshitsune Kazumasa