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Patent Searching and Data


Title:
CELLULOSE ACETATE HAVING HIGH MOLDABILITY AND PRODUCTION THEREOF
Document Type and Number:
Japanese Patent JPH1036401
Kind Code:
A
Abstract:

To obtain a cellulose acetate having a low degree of polymn., a specified average degree of acetylation, a specified viscosity-average degree of polymn., a low crystallinity and an excellent moldability by adding a specified weight range of a sulfuric acid catalyst to cellulose.

A cellulose acetate(CA) of the formula, which has an average degree of acetylation of at least 58.0%, a viscosity-average degree of polymn.(DP) of 200 to 290 and a conc. solution viscosity () determined from the DP by the falling-ball viscosity determination method of the formula, is produced. CA is capable of forming moldings having improved properties, particularly film strength, and an increased flexibility, and it generates a low heat of crystallization and has a low crystallinity and an excellent moldabiity. Since CA has a high solubility in a solvent and a high moldability, while it has a high average degree of polymn. and a high average degree of substitution, moldings having a high moisture resistance and a high dimensional accuracy can be obtained from a CA solution of a low solution viscosity.


Inventors:
TAKEMOTO HIROYUKI
OGAWA HIROSHI
KIYOSE ATSUNOBU
Application Number:
JP20006296A
Publication Date:
February 10, 1998
Filing Date:
July 30, 1996
Export Citation:
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Assignee:
DAICEL CHEM
International Classes:
C08B3/06; B01J27/02; (IPC1-7): C08B3/06; B01J27/02
Attorney, Agent or Firm:
Kaoru Furuya (3 outside)