Cellulose esters and their production in halogenated ionic liquids
    3.
    发明授权
    Cellulose esters and their production in halogenated ionic liquids 有权
    纤维素酯及其在卤代离子液体中的生产

    公开(公告)号:US08273872B2

    公开(公告)日:2012-09-25

    申请号:US13217326

    申请日:2011-08-25

    摘要: Ionic liquids and cellulose ester compositions and processes for producing ionic liquids and cellulose esters. Cellulose esters can be produced by esterifying cellulose in a reaction medium comprising one or more halide ionic liquids and at least one binary component. Cellulose esters prepared via the methods of the present invention can have a degree of substitution (“DS”) of at least 1.5 and can comprise a plurality of ester substituents, where at least 50 percent of the ester substituents comprise alkyl esters having a carbon chain length of at least 6 carbons.

    摘要翻译: 离子液体和纤维素酯组合物和用于生产离子液体和纤维素酯的方法。 纤维素酯可以通过在包含一种或多种卤离子液体和至少一种二元组分的反应介质中酯化纤维素来制备。 通过本发明的方法制备的纤维素酯可以具有至少1.5的取代度(“DS”),并且可以包含多个酯取代基,其中至少50%的酯取代基包括具有碳链的烷基酯 长度至少为6个碳。

    Method for preparing a cellulose formate solution by impregnating and
kneading cellulose slabs
    4.
    发明授权
    Method for preparing a cellulose formate solution by impregnating and kneading cellulose slabs 失效
    通过浸渍和捏合纤维素板制备甲酸纤维素溶液的方法

    公开(公告)号:US6022614A

    公开(公告)日:2000-02-08

    申请号:US981594

    申请日:1998-03-17

    摘要: Process for preparing a solution of cellulose formate from cellulose plates, in particular high-density plates, without prior mechanical destruction of these plates. The plates are dissolved directly, by means of an impregnating step of the whole plates in a base liquid of formic acid, followed by an operation of kneading of the plates thus impregnated in contact with both formic acid and phosphoric acid. The process is preferably carried out in order to prepare ready-for-spinning solutions with, in particular, if necessary, an intermediate operation of adjustment of the final composition. Solutions prepared using such a process. Preparation of objects made of cellulose, starting with these solutions, in particular fibers or films. Assemblies of such fibers or films. Articles reinforced with such fibers or films or assemblies, these reinforced articles being especially tires.

    摘要翻译: PCT No.PCT / EP96 / 02827 Sec。 371日期:1998年3月17日 102(e)1998年3月17日PCT PCT 1996年6月28日PCT公布。 第WO97 / 02292号公报 日期1997年1月23日从纤维素板,特别是高密度板制备纤维素甲酸酯的方法,没有这些板的预先机械破坏。 通过将整个板的浸渍步骤直接溶解在甲酸的基础液中,然后对由此浸渍的与二甲酸和磷酸接触的板进行捏合操作。 该方法优选进行以便制备即将纺丝的溶液,特别是如果必要的话,调整最终组合物的中间操作。 使用这种过程准备的解决方案。 由这些溶液,特别是纤维或薄膜开始制备由纤维素制成的物体。 这种纤维或薄膜的组件。 用这种纤维或膜或组件增强的制品,这些增强制品特别是轮胎。

    Biodegradable oxidized cellulose esters and their uses as microspheres
    7.
    发明授权
    Biodegradable oxidized cellulose esters and their uses as microspheres 失效
    可生物降解的氧化纤维素酯及其用作微球体

    公开(公告)号:US07649089B2

    公开(公告)日:2010-01-19

    申请号:US10975248

    申请日:2004-10-28

    申请人: Vijay Kumar Yang Dong

    发明人: Vijay Kumar Yang Dong

    摘要: A new cellulose excipient, OCCAE, suitable for use as a binder, filler, and/or disintegrant in the development of solid dosage forms and as a bodying agent or a drug carrier in the preparation of topical formulations is described. The cellulose excipient is formed by reacting an oxidized cellulose ester with an alcohol in the presence of a catalyst. The invention also describes the formation of controlled release microspheres using OCCAE and/or oxidized cellulose esters that may be used to control the release of drug in a patient over a time period of several hours to several days.

    摘要翻译: 描述了一种新的纤维素赋形剂OCCAE,其适于在制备固体剂型中作为粘合剂,填充剂和/或崩解剂,以及作为局部制剂制剂中的保护剂或药物载体。 纤维素赋形剂通过在催化剂存在下使氧化的纤维素酯与醇反应而形成。 本发明还描述了使用OCCAE和/或氧化的纤维素酯形成控制释放微球,其可以用于在数小时至数天的时间段内控制药物释放。