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公开(公告)号：US10829449B2
公开(公告)日：2020-11-10
申请号：US16087824
申请日：2017-03-27
IPC分类号： C07D209/48 , C07D307/89 , C09K21/14 , C07C231/14 , C08G73/10
摘要： A method for the manufacture of a bis(ether anhydride) comprises contacting an N-substituted bis(ether phthalimide) with a base under conditions effective to ring open the imides to provide a ring-opened product; and contacting the ring-opened product with an acid under conditions effective to provide a composition comprising the bis(ether anhydride).
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公开(公告)号：US10752603B2
公开(公告)日：2020-08-25
申请号：US16271207
申请日：2019-02-08
发明人： Hariharan Ramalingam , Tarun Kumar Pal , Meerakani Mohamed Ali Sait , Thomas Link Guggenheim , Lioba Maria Kloppenburg
IPC分类号： C07D307/89 , C07D307/80 , C08G73/10 , C07D407/12
摘要： A process for the purification of an oxydiphthalic anhydride includes contacting a mixture of an oxydiphthalic anhydride and at least one of the corresponding oxydiphthalic diacid, a corresponding oxydiphthalic tetraacid, a halophthalic anhydride, and a catalyst with a solvent to provide a slurry. The solvent is capable of solubilizing the corresponding oxydiphthalic diacid, the corresponding oxydiphthalic tetraacid, the halophthalic anhydride, and the catalyst at a temperature of 15 to 50° C., and the oxydiphthalic anhydride is substantially insoluble in the solvent at this temperature. The oxydiphthalic anhydride can be isolated from the slurry. A purified oxydiphthalic anhydride and a polyetherimide prepared therefrom are also disclosed.
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公开(公告)号：US20190256485A1
公开(公告)日：2019-08-22
申请号：US16271207
申请日：2019-02-08
发明人： Hariharan Ramalingam , Tarun Kumar Pal , Meerakani Mohamed Ali Sait , Thomas Link Guggenheim , Lioba Maria Kloppenburg
IPC分类号： C07D307/80 , C08G73/10
摘要： A process for the purification of an oxydiphthalic anhydride includes contacting a mixture of an oxydiphthalic anhydride and at least one of the corresponding oxydiphthalic diacid, a corresponding oxydiphthalic tetraacid, a halophthalic anhydride, and a catalyst with a solvent to provide a slurry. The solvent is capable of solubilizing the corresponding oxydiphthalic diacid, the corresponding oxydiphthalic tetraacid, the halophthalic anhydride, and the catalyst at a temperature of 15 to 50° C., and the oxydiphthalic anhydride is substantially insoluble in the solvent at this temperature. The oxydiphthalic anhydride can be isolated from the slurry. A purified oxydiphthalic anhydride and a polyetherimide prepared therefrom are also disclosed.
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4.发明授权公开(公告)号：US09174904B1
公开(公告)日：2015-11-03
申请号：US14331583
申请日：2014-07-15
摘要： Disclosed herein are ortho aryl substituted bisphenol monomers that exhibit a lower binding energy to estradiol related receptors. The monomers are provided by the condensation of a ketone and phenol in the presence of an acid catalyst.
摘要翻译： 本文公开的是邻苯基取代的双酚单体，其表现出与雌二醇相关受体的较低的结合能。 在酸催化剂存在下，通过酮和苯酚的缩合提供单体。
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