Title:
CELLULOSE ESTER SOLUTION AND PRODUCTION OF MOLDING
Document Type and Number:
Japanese Patent JP3391586
Kind Code:
B2
Abstract:
PURPOSE: To make it possible to use a halogen-free solvent as the poor solvent, to heighten the efficiency of solvent removal and to obtain a molding at good efficiency by using a cellulose ester solution containing a cellulose ester and a fluoroalcohol as a good solvent therefor.
CONSTITUTION: The average degree of substitution of the cellulose ester is 1-3, and the average degree of polymerization is 200-800. A desirable example of the ester is an aliphatic organic acid ester especially cellulose acetate. The degree of acetylation of this ester is 43-62%. The fluoroalcohol has 2-10 carbon atoms and has a fluorine atom at position α. An example of this fluoroalcohol is trifluoroethanol. The boiling point of the fluororalcohol is 90°C or below, desirably 80°C or below because the solvent can be removed at good efficiency and the efficiency of production of a molding can be heightened. As the poor solvent, a halogen-free solvent having a boiling point of 80°C or below (e.g. an alcohol, a ketone or an ester) is used. The ratio of the good solvent to the poor solvent is 30/70 to 95/5 by weight.
Inventors:
Hiroyuki Takemoto
Toru Shibata
Toru Shibata
Application Number:
JP30826294A
Publication Date:
March 31, 2003
Filing Date:
November 16, 1994
Export Citation:
Assignee:
Daicel Chemical Industry Co., Ltd.
International Classes:
C08J5/18; C08K5/05; C08L1/00; C08L1/10; (IPC1-7): C08L1/10; C08J5/18; C08K5/05
Domestic Patent References:
| JP5296230A |
Attorney, Agent or Firm:
Mitsuo Kuwata
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