-
11.发明授权Asymmetric hydrogenation of aromatic-substituted olefins using organoiridium catalyst 失效使用有机铱催化剂对芳族取代烯烃进行不对称加氢
公开(公告)号：US5187281A
公开(公告)日：1993-02-16
申请号：US716016
申请日：1991-06-17
CPC分类号： C07F15/004 , B01J31/2234 , B01J31/2452 , C07C51/36 , B01J2231/645 , B01J2531/0266 , B01J2531/827
摘要： A process for the asymmetric reduction of carboxylic acids of the formula ##STR1## or the amine salts thereof, where R and R.sub.1 are the same or different and are hydrogen, alkyl, cycloalkyl or haloalkyl and Ar is aryl or substituted aryl is disclosed.
摘要翻译： 公开了用于不对称还原式IMA的羧酸或其胺盐的方法，其中R和R 1相同或不同，并且是氢，烷基，环烷基或卤代烷基，Ar是芳基或取代的芳基。
-
公开(公告)号：US5073284A
公开(公告)日：1991-12-17
申请号：US624877
申请日：1990-12-05
IPC分类号： C07F9/6581 , C10M105/74
CPC分类号： C07F9/65814 , C10M105/74 , C10M2223/00 , C10M2223/02 , C10M2223/049 , C10M2223/08 , C10N2240/08
摘要： A hydraulic fluid that remains solids-free at temperatures as low as about -30.degree. C. and has a pour point as low as about -42.degree. C. comprises a cyclic phosphazene oligomer mixture, the structural formula of each molecule of which contains 3 or 4 units selected at random from the group consisting of ##STR1## wherein R is a fluoroalkoxy group --OCH.sub.2 (CF.sub.2).sub.m CF.sub.2 Z, where Z is hydrogen or fluorine, and m is 0 or an integer from 1 to 10; R' and R" are different alkoxyalkyloxy groups in which linear or branched C.sub.1-12 alkoxy is substituted with linear or branched C.sub.1-12 alkoxy; with the proviso that all of R, R' and R" are present in the oligomer mixture.
摘要翻译： 在低至约-30℃的温度下保持无固体并且具有低至约-42℃的倾点的液压流体包含环状磷腈低聚物混合物，其每个分子的结构式含有3 或由4个单元组成的组，其中R是氟烷氧基-OCH 2（CF 2）m CF 2 Z，其中Z是氢或氟，m是0或1至10的整数; R'和R“是不同的烷氧基烷氧基，其中直链或支链C 1-12烷氧基被直链或支链C 1-12烷氧基取代; 条件是R，R'和R“全部存在于低聚物混合物中。
-
公开(公告)号：US4898929A
公开(公告)日：1990-02-06
申请号：US265991
申请日：1988-11-02
IPC分类号： C08G79/02
CPC分类号： C08G79/025
摘要： Substantially linear organophosphazene polymers containing randomly distributed repeating units represented by the formulas: ##STR1## wherein R.sub.1 is a fluoroalkoxy group having the structure:F.sub.3 C--(CF.sub.2).sub.n --CH.sub.2 O--wherein n is 0 or an integer from 1 to 20 and X is fluorine and wherein at least 3 of the R.sub.1 units are different from each other and R.sub.2 represents a group with some unsaturation which enhances the curability of said polymers and represented by the formula: ##STR2## wherein R.sub.3 is an unsaturated monovalent group and R.sub.4 is selected from the group consisting of hydrogen, alkyl and alkoxy, the total number of said units ranging from 3 to about 100,000 and the R.sub.2 groups being present in an amount sufficient to enable cure of said polymers and in the range of about 0.01-50 mole percent of the total number of R.sub.1 and R.sub.2 groups are claimed. The polymers possess excellent solvent and chemical resistance as well as low volume swell properties especially when contacted with petroleum based fuels such as gasoline and particularly when contacted with oxygenated fuels such as gasohol. This makes these materials highly useful as seals such as gaskets and o-rings, hoses, coatings and the like.
-
公开(公告)号：US4698439A
公开(公告)日：1987-10-06
申请号：US862000
申请日：1986-05-12
IPC分类号： C07F9/6581 , C08G79/02 , C10M105/74 , C07F9/00
CPC分类号： C10M105/74 , C07F9/65812 , C08G79/025 , C10M2223/02 , C10M2223/049 , C10N2240/08
摘要： A polyphosphazene hydraulic fluid that remains solids-free on storage at temperatures down to -30.degree. C. over an extended period can be made by reacting a solution of sodium phenoxide, sodium m-methylphenoxide, sodium p-methylphenoxide and sodium trifluoroethoxide with a small stoichiometric excess of cyclic phosphonitrilic chloride oligomer, mainly trimer, and then reacting the remaining replaceable chlorine atoms with a solution of sodium trifluoroethoxide.
摘要翻译： 通过使苯酚钠，间甲基苯酚钠，对甲基苯酚钠和三氟乙酸钠的溶液与小型的溶液反应，可以在长时间内在低至-30℃的温度下储存时保持无固体的聚磷腈液压流体 化学计量过量的环磷酰氯低聚物，主要是三聚体，然后使剩余的可替换氯原子与三氟乙酸钠溶液反应。
-
15.发明授权Asymmetric hydrogenation of aromatic-substituted olefins using organonickel catalyst 失效使用有机镍催化剂对芳族取代烯烃进行不对称加氢
公开(公告)号：US5202472A
公开(公告)日：1993-04-13
申请号：US716012
申请日：1991-06-17
IPC分类号： C07C51/36 , C07C211/27
CPC分类号： C07C51/36 , C07C211/27
摘要： A process for the asymmetric reduction of carboxylic acids of the formula ##STR1## or the amine salts thereof, where R and R.sub.1 are the same or different and are hydrogen, alkyl, cycloalkyl or haloalkyl and Ar is aryl or substituted aryl is disclosed.
摘要翻译： 公开了用于不对称还原式IMA的羧酸或其胺盐的方法，其中R和R 1相同或不同，并且是氢，烷基，环烷基或卤代烷基，Ar是芳基或取代的芳基。
-
16.发明授权Asymmetric hydrogenation of aromatic-substituted olefins using organo-cobalt catalyst 失效使用有机钴催化剂对芳族取代烯烃进行不对称加氢
公开(公告)号：US5187135A
公开(公告)日：1993-02-16
申请号：US716017
申请日：1991-06-17
CPC分类号： B01J31/2452 , B01J31/2234 , B01J31/24 , C07C51/36 , C07F15/065 , B01J2231/645 , B01J2531/0266 , B01J2531/845
摘要： A process for the asymmetric reduction of carboxylic acids of the formula ##STR1## or the amine salts thereof, where R and R.sub.1 are the same or different and are hydrogen, alkyl, cycloalkyl or haloalkyl and Ar is aryl or substituted aryl is disclosed.
摘要翻译： 公开了用于不对称还原式IMA的羧酸或其胺盐的方法，其中R和R 1相同或不同，并且是氢，烷基，环烷基或卤代烷基，Ar是芳基或取代的芳基。
-
公开(公告)号：US4945140A
公开(公告)日：1990-07-31
申请号：US373449
申请日：1989-06-30
IPC分类号： C08G79/02
CPC分类号： C08G79/025
摘要： An improved process for the preparation of highly fluorinated phosphonitrilic elastomers is disclosed. The fluoroalkoxy substituents on phosphonitrilic fluoroelastomers which contain some or all fluoroalkoxy groups in which the terminal carbon bears one or more hydrogen atoms are exchanged with fully fluorinated alkoxide groups in which the terminal carbon bears three fluorines. The process is accomplished using a ligand replacement mixture of an alkali metal fluoroalkoxide of the formula MOC.sub.n.sup.f and a fluoroalcohol of the formula HOC.sub.n.sup.f' where C.sub.n.sup.f is --(CH.sub.2).sub.y (CF.sub.2).sub.n CF.sub.3 where y is an integer 1 or 2 and n is an integer from 0 to 20 and C.sub.n.sup.f' is the same or different from C.sub.n.sup.f where C.sub.n.sup.f' is --(CH.sub.2).sub.y (CF.sub.2).sub.n CF.sub.3 where y and n are as previously defined.
摘要翻译： 公开了制备高度氟化的膦腈基弹性体的改进方法。 含有末端碳带有一个或多个氢原子的一部分或全部氟代烷氧基的磷腈基含氟弹性体上的氟代烷氧基取代基与其中末端碳带有三个氟的完全氟化的醇盐基团交换。 该方法使用式MOCnf的碱金属氟代烷氧化物和式HOCnf'的氟代醇（其中C nf是 - （CH 2）y（CF 2）n CF 3）的配体置换混合物完成，其中y是整数1或2，并且n是 Cnf'与Cnf相同或不同，其中Cnf'是 - （CH2）y（CF2）nCF3，其中y和n如前所定义。
-
公开(公告)号：US4945139A
公开(公告)日：1990-07-31
申请号：US383642
申请日：1989-07-24
IPC分类号： C08G79/02
CPC分类号： C08G79/025
摘要： A process for treating the surface of a cured phosphonitrilic fluoroelastomer of the formula ##STR1## where x is an integer of from about 3 to about 50,000, Q and Q' are the same or different and are fluoroalkoxy of the formula --OCH.sub.2 (CF.sub.2).sub.m CF.sub.2 Z where m is an integer from 0 to 20 and Z is hydrogen or fluorine and Q" is a group having some olefinic unsaturation with a solution of an alkali metal fluoroalkoxide of the formula MOC.sub.n.sup.f where M is an alkali metal and C.sub.n.sup.f is a fluorocarbon moiety of the formula --(CH.sub.2).sub.y (CF.sub.2).sub.n CF.sub.3 where y is 1 or 2 and n is an integer from 1 to 20. The process of this invention causes the replacement of some of the Q and Q' groups with --OC.sub.n.sup.f. The decreased number of Q and Q' where Z is hydrogen results in a cured phosphonitrilic fluoroelastomer surface displaying improved resistance to polar solvents.
摘要翻译： 一种用于处理下式的化合物的表面的方法，其中x是约3至约50,000的整数，Q和Q'相同或不同，并且是式-OCH 2（CF 2）的氟代烷氧基， mCF2Z其中m是0至20的整数，Z是氢或氟，Q“是具有式MOCnf的碱金属氟代烷烃的溶液具有一些烯属不饱和基团，其中M是碱金属，Cnf是碳氟化合物 式（ - ） - （CH2）y（CF2）nCF3的部分，其中y为1或2，n为1至20的整数。本发明的方法导致用-OCnf替换一些Q和Q'基团。 其中Z是氢的Q和Q'的减少的数量导致固化的膦腈基含氟弹性体表面显示改善的极性溶剂的抗性。
-
公开(公告)号：US4923954A
公开(公告)日：1990-05-08
申请号：US289028
申请日：1988-12-23
CPC分类号： C08J3/095 , C08G73/1032 , C08G73/1039 , C08J3/14 , C08J2379/08
摘要： Described is a process for producing, in particulate form, aromatic polyimides based on one or more 2,2-bis[4-(aminophenoxy)phenyl]hexafluoropropanes. The process involves forming a solution of an equimolar mixture of (1) an aromatic tetracarboxylic dianhydride and (2) a 2,2-bis[4-(aminophenoxy)phenyl]hexafluoropropane as the sole or predominant aromatic diamine in (3) a solvent composed of (i) tetrahydrofuran, or (ii) one or more alkyltetrahydrofurans having a normal boiling point below 100.degree. C., or (iii) a mixture of (i) and (ii), and heating and agitating such solution in a closed reaction system under super-atmospheric pressure such that a separate phase of particulate aromatic polyimide is formed. The process avoids difficulties caused by the tendency of the wet polyimide polymer to agglomerate into stringy or tacky masses which can foul reactor and agitator surfaces.
摘要翻译： 描述了一种以颗粒形式生产基于一种或多种2,2-双[4-（氨基苯氧基）苯基]六氟丙烷的芳族聚酰亚胺的方法。 该方法包括在（3）溶剂中形成（1）芳族四羧酸二酐和（2）2,2-双[4-（氨基苯氧基）苯基]六氟丙烷作为唯一或主要的芳族二胺的等摩尔混合物的溶液 由（i）四氢呋喃组成，或（ii）一种或多种正常沸点低于100℃的烷基四氢呋喃，或（iii）（i）和（ii）的混合物，并将该溶液加热并搅拌在封闭的 反应体系在超大气压下形成颗粒状芳族聚酰亚胺的分离相。 该方法避免了湿聚酰亚胺聚合物凝聚成可能污染反应器和搅拌器表面的强力或粘性质量的趋势所引起的困难。
-
公开(公告)号：US4627967A
公开(公告)日：1986-12-09
申请号：US658307
申请日：1984-10-05
申请人： W. Dirk Klobucar
发明人： W. Dirk Klobucar
IPC分类号： C01B21/098 , C01B25/10
CPC分类号： C01B21/0986
摘要： Polymerization grade phosphonitrilic chloride trimer is made by reacting NH.sub.4 Cl and PCl.sub.5 in a solvent (e.g. monochlorobenzene) to form a crude trimer solution, filtering the solution to remove unreacted NH.sub.4 Cl, distilling a portion of the solvent to form a hot concentrate, cooling the concentrate to obtain a precipitate, distilling the precipitate at reduced pressure to first remove a forecut and then a heart-cut of polymerization grade phosphonitrilic chloride trimer.
摘要翻译： 聚合级膦酰氯三聚体通过NH 4 Cl和PCl 5在溶剂（例如一氯苯）中反应形成粗三聚体溶液，过滤溶液以除去未反应的NH 4 Cl，蒸馏出一部分溶剂以形成热浓缩物，将浓缩物冷却至 得到沉淀物，减压蒸馏沉淀物，首先除去前油，然后用聚合级磷酰氯三聚物的心切。
-
-
-
-
-
-
-
-
-
搜索结果
28 条记录 (耗时 0.017 秒)
