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Patent Searching and Data


Title:
CELLULOSE MIXED ESTER AND MOLDED BODY OF SAME
Document Type and Number:
WIPO Patent Application WO/2019/069574
Kind Code:
A1
Abstract:
Provided is a semipermeable membrane which has high chlorine resistance and high alkali resistance. A cellulose mixed ester which is represented by general structural formula (I), and wherein: if X moieties are aromatic acyl groups, the degree of substitution thereof is 2.91 to 3.0; the aromatic acyl groups are composed of optionally substituted benzoyl groups (A) and aromatic acyl groups (B) containing a carboxyl group or a salt of a carboxyl group; and if the above-described degree of substitution is 3.0, the degree of substitution of the optionally substituted benzoyl groups (A) is 2.4 to 2.95 and the degree of substitution of the aromatic acyl groups (B) containing a carboxyl group or a salt of a carboxyl group is 0.05 to 0.6. (In general formula (I), all or some of the X moieties are aromatic acyl groups; in cases where some of the X moieties are aromatic acyl groups, the remainder are hydrogen atoms or alkyl groups; and n represents an integer of 20 to 20,000.)

Inventors:
HASHIZUME TOMOHIRO (JP)
MATSUMURA HIROYUKI (JP)
SHIBATA TOHRU (JP)
KOYAMA HIROSHI (JP)
OHNO MITSURU (JP)
Application Number:
JP2018/031009
Publication Date:
April 11, 2019
Filing Date:
August 22, 2018
Export Citation:
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Assignee:
DAICEL CORP (JP)
International Classes:
C08B3/16; B01D71/18
Domestic Patent References:
WO2017175752A12017-10-12
Foreign References:
JP2007231143A2007-09-13
JPH0987169A1997-03-31
JPS59193831A1984-11-02
JPS58174307A1983-10-13
JP2013530200A2013-07-25
JP2008095026A2008-04-24
JP2009030031A2009-02-12
JP2008120875A2008-05-29
JP2018145382A2018-09-20
JP2018145383A2018-09-20
Attorney, Agent or Firm:
FURUYA Satoshi (JP)
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