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1. 发明授权

US4888420A Water soluble cellulose acetate microspheres 失效
标题翻译：水溶性醋酸纤维素微球
公开(公告)号：US4888420A
公开(公告)日：1989-12-19
申请号：US130345
申请日：1987-12-08
申请人： Thomas L. Steiner , Dana T. Minnick , Kenneth A. Domeshek , Donald H. Lester, Jr.
发明人： Thomas L. Steiner , Dana T. Minnick , Kenneth A. Domeshek , Donald H. Lester, Jr.
IPC分类号： C08B3/28 , C08J3/12 , C08J3/14
CPC分类号： C08J3/14 , C08B3/28 , C08J3/12 , C08J2301/12
摘要： Microparticle of cellulose acetate and derivatives thereof characterized by being water soluble, having a large interior void space and having a plurality of open exterior surface pores. These water soluble microparticles can be loaded with a chemical selected from the group consisting of pharmaceuticals, dyes, flavorings, agriculturals, solid catalysts and fragrances. The microparticles are produced by forming spherical droplets of a dope of water soluble cellulose acetate and water soluble derivatives of cellulose acetate with a solvent therefor, precipitating the spherical droplets in a bath of a precipitant for water soluble cellulose acetate and water soluble derivatives of cellulose acetate, separating the excess precipitant from the microparticles, enriching the microparticles with the precipitant by contacting the microparticles one or more times with a solution of the precipitant, removing rapidly under vacuum substantially all of the precipitant from the microparticles, and recovering the resulting water soluble microparticles.
摘要翻译：乙酸纤维素微粒及其衍生物，其特征在于水溶性，具有大的内部空隙并且具有多个开放的外表面孔。这些水溶性微粒可以装载选自药物，染料，调味剂，农业，固体催化剂和香料的化学物质。通过形成水溶性纤维素乙酸酯的涂料的球形液滴和用其溶剂的乙酸纤维素的水溶性衍生物制备微粒，通过在水溶性乙酸纤维素和乙酸纤维素的水溶性衍生物的沉淀剂浴中沉淀出球形液滴，将多余的沉淀剂与微粒分离，通过使微粒与沉淀剂的溶液接触一次或多次，使沉淀剂富集微粒，在真空下迅速除去微量的基本上所有的沉淀剂，并回收得到的水溶性微粒。

2. 发明授权

US4997599A Preparation of water soluble cellulose acetate microspheres 失效
标题翻译：水溶性醋酸纤维素微球的制备
公开(公告)号：US4997599A
公开(公告)日：1991-03-05
申请号：US394348
申请日：1989-08-15
申请人： Thomas L. Steiner , Dana T. Minnick , Kenneth A. Domeshek , Donald H. Lester, Jr.
发明人： Thomas L. Steiner , Dana T. Minnick , Kenneth A. Domeshek , Donald H. Lester, Jr.
IPC分类号： C08B3/28 , C08J3/12 , C08J3/14
CPC分类号： C08J3/14 , C08B3/28 , C08J3/12 , C08J2301/12 , Y10S514/963 , Y10T428/2984
摘要： Microparticle of cellulose acetate and derivatives thereof characterized by being water soluble, having a large interior void space and having a plurality of open exterior surface pores. These water soluble microparticles can be loaded with a chemical selected from the group consisting of pharmaceuticals, dyes, flavorings, agriculturals, solid catalysts and fragrances. The microparticles are produced by forming spherical droplets of a dope of water soluble cellulose acetate and water soluble derivatives of cellulose acetate with a solvent therefor, precipitating the spherical droplets in a bath of a precipitant for water soluble cellulose acetate and water soluble derivatives of cellulose acetate, separating the excess precipitant from the microparticles, enriching the microparticles with the precipitant by contacting the microparticles one or more times with a solution of the precipitant, removing rapidly under vacuum substantially all of the precipitant from the microparticles, and recovering the resulting water soluble microparticles.
摘要翻译：乙酸纤维素微粒及其衍生物，其特征在于水溶性，具有大的内部空隙并且具有多个开放的外表面孔。这些水溶性微粒可以装载选自药物，染料，调味剂，农业，固体催化剂和香料的化学物质。通过形成水溶性纤维素乙酸酯的涂料的球形液滴和用其溶剂的乙酸纤维素的水溶性衍生物制备微粒，通过在水溶性乙酸纤维素和乙酸纤维素的水溶性衍生物的沉淀剂浴中沉淀出球形液滴，将多余的沉淀剂与微粒分离，通过使微粒与沉淀剂的溶液接触一次或多次，使沉淀剂富集微粒，在真空下迅速除去微量的基本上所有的沉淀剂，并回收得到的水溶性微粒。

3. 发明授权

US5064949A Cellulose ester microparticles and process for making the same 失效
标题翻译：纤维素酯微粒及其制造方法
公开(公告)号：US5064949A
公开(公告)日：1991-11-12
申请号：US709519
申请日：1991-06-03
申请人： Thomas L. Steiner , Kenneth A. Domeshek , William Stitt , Jesse L. Riley , Lance J. Deutsch
发明人： Thomas L. Steiner , Kenneth A. Domeshek , William Stitt , Jesse L. Riley , Lance J. Deutsch
IPC分类号： C08B3/22 , C08B3/28 , C08J3/09 , C08J3/12
CPC分类号： C08J3/122 , C08B3/22 , C08B3/28 , C08J3/091 , C08J2301/10 , Y10T428/2982
摘要： Cellulose ester microparticles with unique properties are made by a process having the following steps:(a) dissolving a cellulose ester in a liquid comprising a solvent for the cellulose ester and a non-solvent for the cellulose ester, thereby forming a dope;(b) spheronizing the dope thereby forming fine droplets of the dope;(c) dropping the droplets for a finite amount of time; and(d) precipitating the droplets in a bath containing a precipitant.
摘要翻译：通过具有以下步骤的方法制备具有独特性质的纤维素酯微粒：（a）将纤维素酯溶解在包含纤维素酯的溶剂和纤维素酯的非溶剂的液体中，从而形成涂料; （b）使涂料滚圆，从而形成涂料的微小液滴; （c）在有限的时间内滴下液滴; 和（d）在含有沉淀剂的浴中使液滴沉淀。

4. 发明授权

US5047180A Process for making cellulose ester microparticles 失效
标题翻译：制备纤维素酯微粒的方法
公开(公告)号：US5047180A
公开(公告)日：1991-09-10
申请号：US342275
申请日：1989-04-24
申请人： Thomas L. Steiner , Kenneth A. Domeshek , William Stitt , Jesse L. Riley , Lance J. Deutsch
发明人： Thomas L. Steiner , Kenneth A. Domeshek , William Stitt , Jesse L. Riley , Lance J. Deutsch
IPC分类号： C08B3/22 , C08B3/28 , C08J3/09 , C08J3/12
CPC分类号： C08J3/122 , C08B3/22 , C08B3/28 , C08J3/091 , C08J2301/10
摘要： Cellulose ester microparticles with unique properties are made by a process having the following steps:(a) dissolving a cellulose ester in a liquid comprising a solvent for the cellulose ester and a non-solvent for the cellulose ester, thereby forming a dope;(b) spheronizing the dope thereby forming fine droplets of the dope;(c) dropping the droplets for a finite amount of time; and(d) precipitating the droplets in a bath containing a precipitant.
摘要翻译：通过具有以下步骤的方法制备具有独特性质的纤维素酯微粒：（a）将纤维素酯溶解在包含纤维素酯的溶剂和纤维素酯的非溶剂的液体中，从而形成涂料; （b）使涂料滚圆，从而形成涂料的微小液滴; （c）在有限的时间内滴下液滴; 和（d）在含有沉淀剂的浴中使液滴沉淀。

5. 发明授权

US4983730A Water soluble cellulose acetate composition having improved processability and tensile properties 失效
标题翻译：水溶性乙酸纤维素组合物具有改善的加工性能和拉伸性能
公开(公告)号：US4983730A
公开(公告)日：1991-01-08
申请号：US240875
申请日：1988-09-02
申请人： Kenneth A. Domeshek , Karen L. Zazzara
发明人： Kenneth A. Domeshek , Karen L. Zazzara
IPC分类号： A61K9/28 , A61K9/36 , C08L1/12
CPC分类号： A61K9/2866 , C08L1/12
摘要： Water soluble cellulose acetate composition having improved processability and tensile properties suitable for application as films, coatings and fibers and comprising one or more lower molecular weight water soluble cellulose acetate components and one or more higher molecular weight water soluble cellulose acetate components, and wherein the lower molecular weight water soluble cellulose acetate components have solution viscosities at least 20 percent of that of the higher molecular weight water soluble cellulose acetate components. An exemplary composition comprises from about 85 to 98 percent by weight of a lower molecular weight water soluble cellulose acetate component having a solution viscosity of form about 5 to 50 cps and from about 15 to 2 percent by weight of a higher molecular weight water soluble cellulose acetate component having a solution viscosity of greater than 100 cps.
摘要翻译：水溶性乙酸纤维素组合物具有改进的加工性能和拉伸性能，适用于薄膜，涂料和纤维，并且包含一种或多种低分子量水溶性乙酸纤维素组分和一种或多种较高分子量的水溶性乙酸纤维素组分，其中下部分子量水溶性乙酸纤维素组分的溶液粘度至少为高分子量水溶性醋酸纤维素组分的20％。示例性组合物包含约85至98重量％的较低分子量的水溶性乙酸纤维素组分，其溶液粘度为约5至50cps，约15至2重量％的较高分子量的水溶性纤维素乙酸酯组分的溶液粘度大于100cps。

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