-
公开(公告)号：US6133381A
公开(公告)日：2000-10-17
申请号：US66172
申请日：1998-04-24
申请人： Jon S. Reed , Charles H. Kolich , Billie B. Dadgar , Donald E. Balhoff , Meng-Sheng Ao , Homer C. Lin , Thorsten W. Brockmann , David R. Brackenridge
发明人： Jon S. Reed , Charles H. Kolich , Billie B. Dadgar , Donald E. Balhoff , Meng-Sheng Ao , Homer C. Lin , Thorsten W. Brockmann , David R. Brackenridge
摘要： This invention relates to a thermally stable brominated polystyrene composition which contains alkali metal base (e.g., NaOH) in an amount less than about 1 wt % such that if the flame retardant is dissolved in bromochloromethane and the resultant solution is extracted with water, the resultant water extract exhibits a pH of at least about 9.0. A preferred composition of this type even when heated to 315.degree. C. for one hour did not undergo darkening--the color remained tan. Comparative samples not containing the base turned black under these same conditions. Especially useful compositions additionally have less than 500 ppm, and better still, less than 100 ppm total Cl, and at least about 67 wt % bromine. Processes for producing the compositions are also described.
摘要翻译： 本发明涉及一种热稳定的溴化聚苯乙烯组合物，其含有少于约1重量％的碱金属碱（例如NaOH），使得如果将阻燃剂溶解在溴氯甲烷中，并将所得溶液用水萃取， 水提取物的pH至少约为9.0。 这种类型的优选组合物即使加热至315℃持续1小时也不会变暗，颜色仍然是棕褐色。 不含碱的比较样品在相同条件下变黑。 特别有用的组合物另外还具有小于500ppm，更好的是小于100ppm的总Cl和至少约67wt％的溴。 还描述了用于制备组合物的方法。
-
公开(公告)号：US5916978A
公开(公告)日：1999-06-29
申请号：US41632
申请日：1998-03-13
申请人： Meng-Sheng Ao , Billie B. Dadgar , Charles H. Kolich , Donald E. Balhoff , Homer C. Lin , David R. Brackenridge , Thorsten W. Brockmann
发明人： Meng-Sheng Ao , Billie B. Dadgar , Charles H. Kolich , Donald E. Balhoff , Homer C. Lin , David R. Brackenridge , Thorsten W. Brockmann
CPC分类号： C08F8/20
摘要： This invention relates to the bromination of styrenic polymers by contacting same with a brominating agent in the presence of a bromination catalyst and, as a reaction solvent, bromochloromethane.
摘要翻译： 本发明涉及苯乙烯聚合物的溴化，其通过在溴化催化剂和作为反应溶剂的溴氯甲烷的存在下与溴化剂接触来进行。
-
公开(公告)号：US5767203A
公开(公告)日：1998-06-16
申请号：US846156
申请日：1997-04-25
申请人： Meng-Sheng Ao , Billie B. Dadgar , Charles H. Kolich , Donald E. Balhoff , Homer C. Lin , David R. Brackenridge , Thorsten W. Brockmann
发明人： Meng-Sheng Ao , Billie B. Dadgar , Charles H. Kolich , Donald E. Balhoff , Homer C. Lin , David R. Brackenridge , Thorsten W. Brockmann
CPC分类号： C08F8/20
摘要： This invention relates to the bromination of styrenic polymers by contacting same with a brominating agent in the presence of a bromination catalyst and, as a reaction solvent, bromochloromethane.
-
公开(公告)号：US6096920A
公开(公告)日：2000-08-01
申请号：US111935
申请日：1998-07-08
申请人： Robert H. Allen , R. Carl Herndon, Jr. , Kannappan C. Chockalingam , W. Dirk Klobucar , Gary D. Focht , Tse-Chong Wu , Gary D. Heidebrecht , Joseph D. McLean , Yaping Zhong , Thorsten W. Brockmann , Ronny W. Lin , William J. Layman, Jr. , Ranjit K. Roy
发明人： Robert H. Allen , R. Carl Herndon, Jr. , Kannappan C. Chockalingam , W. Dirk Klobucar , Gary D. Focht , Tse-Chong Wu , Gary D. Heidebrecht , Joseph D. McLean , Yaping Zhong , Thorsten W. Brockmann , Ronny W. Lin , William J. Layman, Jr. , Ranjit K. Roy
IPC分类号： C07B37/04 , C07C2/86 , C07C41/30 , C07C51/14 , C07C51/41 , C07C51/42 , C07C51/487 , C07C57/30 , C07C59/64 , C07C59/68 , C07C59/84 , C07C67/38 , C07C69/614 , C07C69/734 , C07C69/738 , C07C51/10
CPC分类号： C07C51/14 , C07B37/04 , C07C2/861 , C07C41/30 , C07C51/412 , C07C51/42 , C07C51/487 , C07C67/38 , C07C2531/22 , C07C2531/24 , Y02P20/584
摘要： Palladium-catalyzed arylation of an olefin (e.g., ethylene) with an aromatic halide (e.g., 2-bromo-6-methoxynaphthalene, m-bromobenzophenone, or 4-isobutyl-1-bromobenzene) is conducted in specified media. After a special acid or base phase separation procedure, palladium-catalyzed carbonylation of the olefinically-substituted aromatic intermediate is conducted in specified media using CO and water or an alcohol to form arylalkylcarboxylic acid or ester or substituted arylalkylcarboxylic acid or ester (e.g., racemic 2-(6-methoxy-2-naphthyl)propionic acid, 2-(3-benzoylphenyl)propionic acid, or 2-(4-isobutylphenyl)propionic acid). Catalyst recovery procedures enabling recycle of catalyst residues and efficient recovery of amine hydrogen halide scavenger and solvent used in the arylation reaction are described, as well as novel, highly efficient methods of conducting the carbonylation reaction. The technology is economical and suitable for use on an industrial scale whereby reaction mixtures can be efficiently separated into the desired component mixtures without need for excessive capital investment or tedious, time-consuming operations. High yields of high purity products can be achieved.
摘要翻译： 在特定介质中进行烯烃（例如乙烯）与芳族卤化物（例如2-溴-6-甲氧基萘，间溴代二苯甲酮或4-异丁基-1-溴苯）的芳基化反应。 在特殊的酸或碱相分离方法之后，使用CO和水或醇在特定介质中进行钯催化的烯烃取代的芳族中间体的羰基化以形成芳基烷基羧酸或酯或取代的芳基烷基羧酸或酯（例如外消旋2 - （6-甲氧基-2-萘基）丙酸，2-（3-苯甲酰基苯基）丙酸或2-（4-异丁基苯基）丙酸）。 描述了催化剂残余物的再循环和在芳基化反应中使用的胺卤化物清除剂和溶剂的有效回收的催化剂回收程序，以及进行羰基化反应的新型高效方法。 该技术是经济的并且适用于工业规模，其中反应混合物可以有效地分离成所需的组分混合物，而无需过多的资本投入或繁琐，耗时的操作。 可以实现高产率的高纯度产品。
-
-
-
搜索结果
4 条记录 (耗时 0.037 秒)
