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112 条记录 (耗时 0.034 秒)

    MANUFACTURE OF NANOCELLULOSE AND INTERMEDIATES THEREOF
    22.
    发明申请
    MANUFACTURE OF NANOCELLULOSE AND INTERMEDIATES THEREOF 有权

    公开(公告)号：US20210332153A1

    公开(公告)日：2021-10-28

    申请号：US17368920

    申请日：2021-07-07

    申请人： FineCell Sweden AB

    发明人： Dongfang LI ,  Jonatan HENSCHEN ,  Monica EK

    IPC分类号： C08B3/24 ,  C08L1/10 ,  D21C9/00 ,  D21H11/18 ,  C08L1/12 ,  C08B3/06 ,  C08K5/11 ,  C08B3/00

    摘要： The present invention relates to a method for manufacturing nanocellulose comprising the steps of: a) providing a cellulose-containing material wherein the cellulose-containing material contains less than 20 wt. % water, b) contacting the cellulose-containing material with oxalic acid dihydrate, and heating above the melting point of the oxalic acid dihydrate, to obtain cellulose oxalates, c) washing the mixture, d) preparing a suspension comprising the washed material from step c) and e) recovering nanocellulose from the suspension. The present invention relates also to a method of manufacturing nanocellulose intermediate which comprises the above described steps a)-c). The methods disclosed in the present invention are quick, simple, and direct. Pulp can be used as raw material. A considerable amount of free carboxyl groups are introduced. A high yield can be obtained. The methods are inexpensive.

    Antifogging film
    23.
    发明授权
    Antifogging film 有权

    公开(公告)号：US10479872B2

    公开(公告)日：2019-11-19

    申请号：US15919724

    申请日：2018-03-13

    申请人： FUJIFILM Corporation

    发明人： Yui Matsuura ,  Syougo Katano ,  Toshiya Mita ,  Akihiro Ikeyama

    IPC分类号： C08J5/18 ,  C08L1/10 ,  C09K3/18 ,  C08B3/16 ,  C08B3/24 ,  C08L67/02

    摘要： An antifogging film includes a film base and a saponified layer. The film base is formed of cellulose triacetate as cellulose acylate. The saponified layer is provided on a first base surface of the film base and serves as a first film surface of the antifogging film. The saponified layer contains saponified cellulose triacetate. The antifogging film is configured such that the first film surface has a contact angle of 20° or less 15 seconds after dropping of pure water thereto. In a case where the amount of acyl groups of the first film surface is X and the amount of acyl groups of a second base surface is Y, an acyl group ratio obtained by X/Y is 0.7 or less.

    MANUFACTURE OF NANOCELLULOSE AND INTERMEDIATES THEREOF
    24.
    发明申请
    MANUFACTURE OF NANOCELLULOSE AND INTERMEDIATES THEREOF 审中-公开

    公开(公告)号：US20180291119A1

    公开(公告)日：2018-10-11

    申请号：US16003176

    申请日：2018-06-08

    申请人： FineCell Sweden AB

    发明人： Dongfang LI ,  Jonatan HENSCHEN ,  Monica EK

    IPC分类号： C08B3/24 ,  D21H11/18 ,  D21C9/00 ,  C08L1/10 ,  C08B3/00

    摘要： The present invention relates to a method for manufacturing nanocellulose comprising the steps of: a) providing a cellulose-containing material wherein the cellulose-containing material contains less than 20 wt. % water, b) contacting the cellulose-containing material with oxalic acid dihydrate, and heating above the melting point of the oxalic acid dihydrate, to obtain cellulose oxalates, c) washing the mixture, d) preparing a suspension comprising the washed material from step c) and e) recovering nanocellulose from the suspension. The present invention relates also to a method of manufacturing nanocellulose intermediate which comprises the above described steps a)-c). The methods disclosed in the present invention are quick, simple, and direct. Pulp can be used as raw material. A considerable amount of free carboxyl groups are introduced. A high yield can be obtained. The methods are inexpensive.

    Methods for Synthesizing Acylated Cellulose Through Instillation of an Acidic Catalyst
    27.
    发明申请
    Methods for Synthesizing Acylated Cellulose Through Instillation of an Acidic Catalyst 审中-公开
    通过酸化催化剂合成酰化纤维素的方法

    公开(公告)号：US20130096297A1

    公开(公告)日：2013-04-18

    申请号：US13273304

    申请日：2011-10-14

    申请人： Michael T. Combs ,  Thomas S. Garrett

    发明人： Michael T. Combs ,  Thomas S. Garrett

    IPC分类号： C08B3/24 ,  C08B3/06

    CPC分类号： C08B3/06

    摘要： Instilling an acidic catalyst to a reaction mixture can be beneficial during the acylation of cellulose. Methods described herein can comprise preparing a reaction mixture comprising an acylating agent and cellulose, instilling a catalyst comprising an acid to the reaction mixture at an overall catalyst loading level of about 1% or less by weight of the cellulose, and reacting the cellulose with the acylating agent in the presence of the catalyst, thereby forming an acylated cellulose.

    摘要翻译： 在反应混合物中放入酸性催化剂在纤维素酰化过程中是有益的。 本文所述的方法可以包括制备包含酰化剂和纤维素的反应混合物，将所述含有酸的催化剂以所述纤维素的约1重量％或更少的总催化剂负载水平向所述反应混合物中滴加，并将所述纤维素与 酰化剂在催化剂存在下，由此形成酰化纤维素。

    6-position highly acetylated cellulose diacetate and process for producing the same
    28.
    发明授权
    6-position highly acetylated cellulose diacetate and process for producing the same 有权
    6位高度乙酰化纤维素二乙酸酯及其制备方法

    公开(公告)号：US08133990B2

    公开(公告)日：2012-03-13

    申请号：US12343217

    申请日：2008-12-23

    申请人： Akihiro Higuchi

    发明人： Akihiro Higuchi

    IPC分类号： C08B3/06 ,  C08B3/24

    CPC分类号： C08B3/06

    摘要： Disclosed is a cellulose diacetate comprising a 6-position highly acetylated cellulose diacetate having a 6-percent viscosity of 40 to 600 mPa·s, and having a total degree of acetyl substitution of DSt and a degree of acetyl substitution at the 6-position of DS6, wherein DSt and DS6 satisfy following Conditions (1) and (2): 2.0≦DSt

    摘要翻译： 公开了一种纤维素二乙酸酯，其包含6位高度乙酰化的纤维素二乙酸酯，其6％粘度为40至600mPa·s，并且具有总共乙酰基取代度的DSt和在6位的乙酰基取代度 DS6，其中DSt和DS6满足以下条件（1）和（2）：2.0＆nlE; DSt <2.6（1）0.400≥（DS6 / DSt）≥0.531-0.088×DSt（2）纤维素二乙酸酯通常可用作 具有高酰基取代度的不同酰基的纤维素酰化物的原料具有优异的光学性能，并且通常可用作照相材料和光学材料。

    Method for producing cellulose acetate film
    29.
    发明授权
    Method for producing cellulose acetate film 有权
    乙酸纤维素膜的制造方法

    公开(公告)号：US07148344B2

    公开(公告)日：2006-12-12

    申请号：US11117567

    申请日：2005-04-29

    申请人： Yukiko Nakanishi ,  Hiroki Taniguchi ,  Katako Ueda

    发明人： Yukiko Nakanishi ,  Hiroki Taniguchi ,  Katako Ueda

    IPC分类号： C08B3/06 ,  C08B3/24 ,  C08B3/30

    CPC分类号： C08J5/18 ,  C08B3/06 ,  C08J2301/12 ,  D01F2/28

    摘要： Using the dope containing the following cellulose acetate (1), (2), or (3), a film is prepared by the casting process: (1) a cellulose acetate having carboxyl groups binding to at least one member selected from the group consisting of a cellulose acetate and a hemicellulose acetate, wherein at least a part of said carboxyl groups are in an acidic form; (2) a cellulose acetate containing at least one member selected from the group consisting of an acid having an acid dissociation exponent pKa of 1.93 to 4.50 in water, an alkali metal salt of said acid and an alkaline earth metal of said acid; or (3) a cellulose acetate containing an alkali metal or an alkaline earth metal wherein the total content of an alkaline metal and an alkaline earth metal in 1 gram of the cellulose acetate is from an effective amount to 5.5×10−6 equivalent (in terms of ion equivalent). The above cellulose acetate is also useful for spinning process. The cellulose acetate includes a cellulose diacetate and a cellulose triacetate. The cellulose acetate of the present invention has high film-releasability from a support and excellent optical characteristics.

    摘要翻译： 使用含有以下醋酸纤维素（1），（2）或（3）的涂料，通过流延法制备膜：（1）具有羧基的乙酸纤维素结合至少一种选自 的乙酸纤维素和乙酸半纤维素，其中所述羧基的至少一部分为酸性形式; （2）含有至少一种选自水中酸解离指数pKa为1.93至4.50的酸的所述乙酸纤维素，所述酸的碱金属盐和所述酸的碱土金属; 或（3）含有碱金属或碱土金属的乙酸纤维素，其中1克乙酸纤维素中的碱金属和碱土金属的总含量为有效量为5.5×10 -6〜 / SUP>等效（以离子当量计）。 上述醋酸纤维素也可用于纺丝过程。 乙酸纤维素包括二乙酸纤维素和三醋酸纤维素。 本发明的乙酸纤维素与支持体的剥离性高，光学特性优异。

    Preparation of cellulose diacetate by recycling processed film
    30.
    发明授权
    Preparation of cellulose diacetate by recycling processed film 失效
    通过循环加工膜制备纤维素二乙酸酯

    公开(公告)号：US5214137A

    公开(公告)日：1993-05-25

    申请号：US652710

    申请日：1991-02-08

    申请人： Alan K. Wilson ,  Fred D. Barlow, Jr.

    发明人： Alan K. Wilson ,  Fred D. Barlow, Jr.

    IPC分类号： C08B3/06 ,  C08B3/24 ,  G03C11/24

    CPC分类号： G03C11/24 ,  C08B3/06 ,  C08B3/24

    摘要： A one step process for preparing cellulose diacetates from processed film having cellulose triacetate as a base. The process involves use of an organic acid such as acetic acid and a solvolysis agent such as an alkanol or water. Hydrogen and a hydrogenation catalyst are optionally employed. The process allows for a simple way of recycling a material that presently is not recycled to any appreciable extent.

    摘要翻译： 从具有三乙酸纤维素为基础的加工膜制备纤维素二乙酸酯的一步法。 该方法包括使用有机酸如乙酸和溶剂分解剂如烷醇或水。 任选地使用氢和氢化催化剂。 该过程允许将目前不被回收的材料再循环到任何明显的程度的简单方法。