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公开(公告)号：US20210139611A1
公开(公告)日：2021-05-13
申请号：US17153285
申请日：2021-01-20
Applicant: Daicel Corporation
Inventor： Tomohiro HASHIZUME , Hiroyuki MATSUMURA , Tohru SHIBATA , Hiroshi KOYAMA , Mitsuru OHNO , Tomoichi WATABE
Abstract: A cellulose ester, wherein, in a structural formula of the following general formula (I), a degree of substitution where X is an acyl group is from 2.91 to 3.0; the acyl group includes benzoyl group (A) optionally having a substituent, and benzoyl group (B) optionally having a substituent different from that of benzoyl group (A); and when the degree of substitution is 3.0, a degree of substitution of benzoyl group (A) is from 1.5 to 2.9, and a degree of substitution of benzoyl group (B) is from 0.1 to 1.5, wherein all or some of X represents an acyl group; when some of X represents an acyl group, the remainder represents a group selected from a hydrogen atom and an alkyl group; and n represents an integer of from 20 to 20,000.
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公开(公告)号：US20190161557A1
公开(公告)日：2019-05-30
申请号：US16091951
申请日：2017-04-04
Applicant: Daicel Corporation
Inventor： Tomohiro HASHIZUME , Hiroyuki MATSUMURA , Tohru SHIBATA , Hiroshi KOYAMA , Mitsuru OHNO , Tomoichi WATABE
Abstract: A cellulose ester, wherein, in a structural formula of the following general formula (I), a degree of substitution where X is an acyl group is from 2.91 to 3.0; the acyl group includes benzoyl group (A) optionally having a substituent, and benzoyl group (B) optionally having a substituent different from that of benzoyl group (A); and when the degree of substitution is 3.0, a degree of substitution of benzoyl group (A) is from 1.5 to 2.9, and a degree of substitution of benzoyl group (B) is from 0.1 to 1.5, wherein all or some of X represents an acyl group; when some of X represents an acyl group, the remainder represents a group selected from a hydrogen atom and an alkyl group; and n represents an integer of from 20 to 20,000.
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