中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

196 records (took 0.018 seconds)

    Ruthenium-containing catalyst composition for olefin metathesis
    71.
    发明授权
    Ruthenium-containing catalyst composition for olefin metathesis 失效
    用于烯烃复分解的含钌催化剂组合物

    公开(公告)号：US6156692A

    公开(公告)日：2000-12-05

    申请号：US842251

    申请日：1997-04-24

    Applicant: Philip O. Nubel ,  Craig Lane Hunt ,  David S. Choi ,  Tobin J. Marks

    Inventor： Philip O. Nubel ,  Craig Lane Hunt ,  David S. Choi ,  Tobin J. Marks

    IPC: B01J31/18 ,  B01J31/22 ,  B01J31/24 ,  C07C6/04 ,  C07C6/06 ,  C07F15/00 ,  C08G61/08 ,  B01J31/00

    CPC classification number: C08G61/08 ,  B01J31/185 ,  B01J31/2286 ,  B01J31/2295 ,  B01J31/24 ,  C07C6/04 ,  C07C6/06 ,  B01J2231/14 ,  B01J2231/543 ,  B01J2531/821 ,  C07C2531/02 ,  C07C2531/24

    Abstract: A ruthenium-containing metathesis catalyst system which contains a ruthenium compound (A), a phosphorus compound (B), and a compound (C) containing a carbon-to-carbon triple bond. The mole ratio of compounds A:B:C is typically in the range of about 1.0:0.01-100:0.01-100. The ruthenium compound (A) is a Ru(II), Ru(III), or Ru(IV) compound containing an anionic ligand (X) and optionally an arene ligand and optionally a phosphorus compound ligand. The phosphorus compound (B) is optional if the ruthenium compound (A) contains a phosphorus-containing ligand. The catalyst system is employed in processes to metathesize olefins, including ring-opening metathesis polymerization of cyclic olefins, metathesis of acyclic olefins, acyclic diene metathesis oligomerization or polymerization, cross-metathesis of cyclic and acyclic olefins, ring-closing metathesis, metathesis depolymerization of unsaturated polymers, and metathesis of functionalized olefins.

    Abstract translation: 含有钌化合物（A），磷化合物（B）和含有碳 - 碳三键的化合物（C）的含钌复分解催化剂体系。 化合物A：B：C的摩尔比通常在约1.0：0.01-100：0.01-100的范围内。 钌化合物（A）是含有阴离子配体（X）的Ru（II），Ru（III）或Ru（IV）化合物以及任选的芳族配体和任选的磷化合物配体。 如果钌化合物（A）含有含磷配体，磷化合物（B）是任选的。 催化剂体系用于将烯烃分离的方法，包括环烯烃的开环易位聚合，无环烯烃的复分解，无环二烯复分解低聚或聚合，环状和非环烯烃的交叉复分解，闭环复分解，复分解解聚 不饱和聚合物和官能化烯烃的复分解。

    Poled polymeric nonlinear optical materials
    78.
    发明授权
    Poled polymeric nonlinear optical materials 失效
    极化聚合物非线性光学材料

    公开(公告)号：US5371173A

    公开(公告)日：1994-12-06

    申请号：US981342

    申请日：1992-11-25

    Applicant: Tobin J. Marks ,  Michael A. Hubbard ,  Jiann T. Lin

    Inventor： Tobin J. Marks ,  Michael A. Hubbard ,  Jiann T. Lin

    IPC: C08G73/12 ,  G02F1/361 ,  C08G73/10

    CPC classification number: G02F1/3617 ,  C08G73/124

    Abstract: The synthesis of a nonlinear chromophoric co-monomer 3,5-diamino-4'-nitrodiphenylamine and use as a reactive component in combination with a bismaleimide monomer in a NLO-active polyimide matrix is disclosed. After concurrent corona or contact poling and thermal polymerization, thin films of these chromophoric polyimides exhibit high second harmonic generation efficiencies and high DSC-determined glass transition temperatures. These poled polyimides also exhibit excellent SHG temporal stability, retaining 85-90% of the initial second harmonic efficiency after more than one month in air at 85.degree. C.

    Abstract translation: 公开了非线性发色共聚单体3,5-二氨基-4'-硝基二苯胺的合成，并将其用作与Nlo-活性聚酰亚胺基体中的双马来酰亚胺单体组合的反应性组分。 在共同电晕或接触极化和热聚合之后，这些发色聚酰亚胺的薄膜表现出高的二次谐波产生效率和高DSC测定的玻璃化转变温度。 这些极化的聚酰亚胺也具有优异的SHG时效性，在85℃的空气中保持一个月以上的初始二次谐波效率的85-90％。

    Homogeneous catalysts for stereoregular olefin polymerization
    79.
    发明授权
    Homogeneous catalysts for stereoregular olefin polymerization 失效
    用于立体规则烯烃聚合的均相催化剂

    公开(公告)号：US5330948A

    公开(公告)日：1994-07-19

    申请号：US860784

    申请日：1992-03-31

    Applicant: Tobin J. Marks ,  Moris S. Eisen ,  Michael A. Giardello

    Inventor： Tobin J. Marks ,  Moris S. Eisen ,  Michael A. Giardello

    IPC: C08F4/16 ,  C08F4/52 ,  C08F4/64 ,  C08F4/76 ,  C08F20/12 ,  C08F4/62 ,  C08F4/622 ,  C08F4/642 ,  C08F4/68

    CPC classification number: C08F20/12 ,  C08F4/52 ,  C08F4/76 ,  Y10S526/943

    Abstract: The synthesis, and use as precatalysts of chiral organozirconium complexes for olefin polymerization are disclosed, having the structure (C.sub.5 R'.sub.4-x R*.sub.x) A (C.sub.5 R".sub.4-y R'".sub.y) M Q.sub.p, where x and y represent the number of unsubstituted locations on the cyclopentadienyl ring; R', R", R'", and R* represent substituted and unsubstituted alkyl groups having 1-30 carbon atoms and R* is a chiral ligand; A is a fragment containing a Group 13, 14, 15, or 16 element of the Periodic Table; M is a Group 3, 4, or 5 metal of the Periodic Table; and Q is a hydrocarbyl radical, or halogen radical, with 3.ltoreq.p.ltoreq.o. Related complexes may be prepared by alkylation of the corresponding dichorides. In the presence of methylalumoxane or triarylborane cocatalysts, these complexes form "cation-like" species which are highly active for olefin polymerization. In combination with a Lewis acid cocatalyst, propylene or other .alpha.-olefin polymerization can be effected with very high efficiency and isospecificity.

    Abstract translation: 公开了具有结构（C5R'4-xR * x）A（C5R''4-yR“'y）M Qp的合成和用作烯烃聚合的手性有机锆络合物的预催化剂，其中x和y表示 环戊二烯基环上未取代位置的数目; R'，R“，R”'和R *表示取代和未取代的具有1-30个碳原子的烷基，R *是手性配体; A是含有元素周期表第13,14,15或16族元素的片段; M是元素周期表的第3,4或5族金属; 且Q为烃基或卤素基团，其中3≤n≤0。 相关络合物可以通过相应的二氯化碳的烷基化来制备。 在甲基铝氧烷或三芳基硼烷助催化剂存在下，这些络合物形成对于烯烃聚合具有高活性的“阳离子”物质。 与路易斯酸助催化剂组合，丙烯或其它α-烯烃聚合可以以非常高的效率和特异性实现。

    Process for uranium isotope separation
    80.
    发明授权
    Process for uranium isotope separation 失效
    铀同位素分离方法

    公开(公告)号：US4097384A

    公开(公告)日：1978-06-27

    申请号：US668829

    申请日：1976-03-22

    Applicant: John H. Coleman ,  Tobin J. Marks

    Inventor： John H. Coleman ,  Tobin J. Marks

    IPC: B01D59/34 ,  B01J19/12 ,  C07F5/00 ,  B01J1/10 ,  B01K1/00

    CPC classification number: B01D59/34 ,  B01J19/121 ,  C07F5/003

    Abstract: Separation of U.sup.235 and U.sup.238 isotopes by converting a mixture of these isotopes to organic compounds or to silicon compounds and then irradiating the isotope compounds selectively to change their chemical (and/or physical) properties, thereby to facilitate separation. In a preferred embodiment of the invention the uranium compounds are selected from the group having a chemical moiety R bonded directly to the U atom, the U-R bond having a fundamental, overtone, or combination virbational absorption frequency between 900 and 1100 cm.sup.-1. The selected U mixture is then irradiated with a frequency-selective CO.sub.2 laser.

    Abstract translation: 通过将这些同位素的混合物转化为有机化合物或硅化合物，然后选择性地照射同位素化合物来改变其化学（和/或物理）性质，从而便于分离，从而分离U235和U238同位素。 在本发明的一个优选实施方案中，铀化合物选自具有与U原子直接键合的化学部分R的基团，U-R键具有基本的，泛音，或者在900和1100cm -1之间的组合防晒吸收频率。 然后将所选的U混合物用频率选择性CO 2激光器照射。

Patent Agency Ranking