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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。

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