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    Process for producing cellulose derivative and cellulose derivative
    1.
    发明授权
    Process for producing cellulose derivative and cellulose derivative 有权

    公开(公告)号：US10005849B2

    公开(公告)日：2018-06-26

    申请号：US15030936

    申请日：2014-10-07

    Applicant: NEC Corporation

    Inventor： Kiyohiko Toyama ,  Masatoshi Iji ,  Shukichi Tanaka

    IPC: C08B3/16 ,  C08L1/14 ,  C08L67/02

    CPC classification number: C08B3/16 ,  C08L1/14 ,  C08L67/02

    Abstract: A process for producing a cellulose derivative, comprising: a first step including reacting a cellulose and a first reactant comprising a long-chain reactant for reacting with a hydroxy group of the cellulose to introduce a long-chain organic group having 5 or more carbon atoms, in a solid-liquid heterogeneous system, to form a cellulose derivative in a swollen state, the cellulose derivative having the long-chain organic group having 5 or more carbon atoms introduced therein and having a part of hydroxy groups of the cellulose remained, and performing solid-liquid separation to obtain the cellulose derivative as an intermediate; and a second step including reacting the intermediate cellulose derivative and a second reactant comprising a short-chain reactant for reacting with a remaining hydroxy group of the intermediate cellulose derivative to introduce a short-chain organic group having 4 or less carbon atoms to form a final cellulose derivative having the short-chain organic group having 4 or less carbon atoms introduced therein.

    Cellulose derivative and resin composition for molding
    2.
    发明授权
    Cellulose derivative and resin composition for molding 有权

    公开(公告)号：US11591410B2

    公开(公告)日：2023-02-28

    申请号：US15521965

    申请日：2015-04-24

    Applicant: NEC Corporation

    Inventor： Kiyohiko Toyama ,  Masatoshi Iji ,  Shukichi Tanaka

    IPC: C08B3/16 ,  C08L1/14

    Abstract: A cellulose derivative having a long-chain organic group having 5 or more carbon atoms and a short-chain organic group having 4 or less carbon atoms which are introduced by use of hydroxy groups of a cellulose, and including a crystal structure derived from a cellulose derivative portion to which the short-chain organic group is linked, wherein an average number of hydroxy groups per glucose unit is of 1.0 or less.

    Cellulose resin, molding material, molded body, and method for producing cellulose resin
    3.
    发明授权
    Cellulose resin, molding material, molded body, and method for producing cellulose resin 有权

    公开(公告)号：US11572416B2

    公开(公告)日：2023-02-07

    申请号：US16617571

    申请日：2018-05-31

    Applicant: NEC CORPORATION

    Inventor： Shukichi Tanaka ,  Midori Shimura

    IPC: C08B3/16 ,  C08B3/26

    Abstract: A cellulose resin wherein a hydrogen atom of a hydroxy group of cellulose is substituted with a long-chain component which is a linear saturated aliphatic acyl group having 14 or more carbon atoms and a short-chain component which is an acyl group (propionyl group) having 3 carbon atoms, the degree of substitution with the long-chain component (DSLo) and the degree of substitution with the short-chain component (DSSh) satisfy the following conditional expressions (1) and (2): DSLo+DSSh≥2.1  (1) 4≤DSSh/DSLo≤12  (2), the Izod impact strength is 5.0 kJ/m2 or more, and the MFR (melt flow rate at 200° C. and under a load of 5 kg) is 10 g/10 min or more.

    PROCESS FOR PRODUCING CELLULOSE DERIVATIVE AND CELLULOSE DERIVATIVE
    7.
    发明申请
    PROCESS FOR PRODUCING CELLULOSE DERIVATIVE AND CELLULOSE DERIVATIVE 有权
    生产纤维素衍生物和纤维素衍生物的方法

    公开(公告)号：US20150141639A1

    公开(公告)日：2015-05-21

    申请号：US14404247

    申请日：2013-05-31

    Applicant: NEC Corporation

    Inventor： Kiyohiko Toyama ,  Massatoshi Iji ,  Shukichi Tanaka

    IPC: C08B3/06 ,  C08B3/10

    CPC classification number: C08B3/06 ,  C08B3/00 ,  C08B3/08 ,  C08B3/10 ,  C08B3/16 ,  C08B3/20 ,  C08B3/22 ,  C08L1/10 ,  C08L1/12 ,  C08L1/14

    Abstract: A process for producing a cellulose derivative, including reacting a reactant and a cellulose or a derivative thereof in a solid-liquid heterogeneous system to form a cellulose derivative containing a long-chain organic group having 5 or more carbon atoms introduced therein, in a swollen state, and performing solid-liquid separation to obtain the cellulose derivative containing a long-chain organic group introduced therein.

    Abstract translation: 一种生产纤维素衍生物的方法，包括使反应物和纤维素或其衍生物在固 - 液异相体系中反应，形成含有引入其中具有5个或更多碳原子的长链有机基团的纤维素衍生物 状态，进行固液分离，得到含有长链有机基团的纤维素衍生物。

    Cellulose derivative and use thereof
    8.
    发明授权
    Cellulose derivative and use thereof 有权

    公开(公告)号：US10982009B2

    公开(公告)日：2021-04-20

    申请号：US15766116

    申请日：2016-08-29

    Applicant: NEC CORPORATION

    Inventor： Midori Shimura ,  Shukichi Tanaka ,  Kiyohiko Toyama ,  Masatoshi Iji

    IPC: C08B1/00 ,  C08B3/16 ,  C08L1/14 ,  C08B1/02 ,  C08L1/10

    Abstract: To provide a cellulose derivative excellent in thermoplasticity, water resistance and strength (elastic modulus, impact strength), a cellulose derivative, which is obtained by introducing a short-chain organic group (acetyl group), a medium-chain organic group having 3 to 5 carbon atoms and a long-chain organic group having 6 to 30 carbon atoms at the following substitution degrees DSs into a cellulose, is used: Short-chain organic group: 0.7≤DSSH≤1.5; Medium-chain organic group: 0.5≤DSME≤2.0; Long-chain organic group: 0.1≤DSLO

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