摘要:
The present invention relates to catalyst systems for preparing isotactic polyolefins obtainable by reacting at least one chiral transition metal compound and at least one cocatalyst which is able to convert the chiral transition metal compound into a cation, where the chiral transition metal compound contains two bidentate chelating ligands connected to one another via a bridge and, if desired, one or two further monodentate ligands, with the four coordinating atoms of the two chelating ligands being in an approximately planar arrangement around the transition metal ion and up to two further ligands being located above and below this approximately planar coordination sphere formed by the four coordinating atoms of the two chelating ligands and, in the case of two such further ligands, these being in the trans position relative to one another, to the use of the catalyst systems of the present invention for preparing polyolefins, to a process for preparing polyolefins by polymerization or copolymerization of at least one olefin in the presence of one of the catalyst systems of the present invention, to the use of chiral transition metal compounds for preparing a catalyst system for the polymerization of olefins, to chiral transition metal compounds, to a process for preparing a catalyst system for olefin polymerization, to a process for preparing isotactic polyolefins, to polyolefins obtainable by a process according to the present invention, to polyolefin compositions comprising the polyolefins of the present invention and to products produced from such polyolefin compositions.
摘要:
The present invention relates to organometallic transition metal compounds of the formula (I) M1 is a metal of group 3, 4, 5 or 6 of the Periodic Table of the Elements or the lanthanicles, X are identical or different and are each an organic or inorganic radical, where two radicals X can also be joined to one another, n is a natural number from 1 to 4, T1, T2 are identical or different and are each a divalent group selected from the group consisting of —O—, —S—, —Se—, —Te—, —N(R13)_′—P(R13)—, —As(R13)—, Sb(R13)—, —Si(R13)2-, —C(R13 R14)—C(R13 R15)— and —C(R14)═C(R15)—, where R13, R14 and R15 are identical or different and are each hydrogen or an organic radical having from 1 to 40 carbon atoms, R1, R7 are identical or different and are each hydrogen or an organic radical having from 1 to 40 carbon atoms, R2 R8 are identical or different and are each hydrogen or an organic radical having from 1 to 40 carbon atoms, R3 R9 are identical or different and are each halogen or an organic radical having from 1 to 40 carbon atoms, where R3 is not methyl when T1 is —C(H)═C(H)—, R4, R5 R6, R10, R11 and R12 are identical or different and are each hydrogen, halogen or an organic radical having from 1 to 40 carbon atoms, or two adjacent radicals R4 , R5, R6, R10, R11 and R12 together with the atoms connecting them form a monocyclic or polycyclic, substituted or unsubstituted ring system which has from 1 to 40 carbon atoms and may also contain heteroatoms selected from the group consisting of the elements O, S, Se, Te, N, P, As, Sb and Si, or, if T1 or T2 is —O—, —S—, —Se— or —Te—, the radical R3 together with R4 and/or the radical R9 together with R10 forms a monocyclic or polycyclic, substituted or unsubstituted ring system which has from 1 to 40 carbon atoms and may also contain heteroatoms selected from the group consisting of the elements O, S, Se, Te, N, P, As, Sb and Si, and A is a bridge consisting of a divalent atom or a divalent group, biscyclopentadienyl ligand systems having such a substitution pattern, catalyst systems comprising at least one of the organometallic transition metal compounds of the present invention, a process for preparing polyolefins by polymerization or copolymerization of at least one olefin in the presence of one of the catalyst systems of the present invention and the polyolefins obtainable in this way, the use of the biscyclopentaclienyl ligand systems of the present invention for preparing organometallic transition metal compounds and a process for preparing organometallic transition metal compounds using the biscyclopentaclienyl ligand systems.
摘要:
A new class of heterocyclic metallocenes, a catalytic system containing them and a process for polymerizing addition polymerizable monomers using the catalytic system are disclosed; the heterocyclic metallocenes correspond to the formula (I): YjR″iZjjMeQkPl wherein Y is a coordinating group containing a six π electron central radical directly coordinating Me, to which are associated one or more radicals containing at least one non-carbon atom selected from B, N, O, Al, Si, P, S, Ga, Ge, As, Se, In, Sn, Sb and Te; R″ is a divalent bridge between the Y and Z groups; Z is a coordinating group, optionally being equal to Y; Me is a transition metal; Q is halogen or hydrocarbon substituents; P is a counterion; i is 0 or 1; j is 1-3; jj is 0-2; k is 1-3; and l is 0-2.
摘要翻译:公开了一类新的杂环金属茂,含有它们的催化体系和使用催化体系聚合加成聚合单体的方法; 所述杂环金属茂对应于式(I):Y Z i R Z Z 其中Y是包含直接配位Me的六个π电子中心基团的配位基团,其中与一个或多个选自B,N,O,Al的至少一个非碳原子相连; ,Si,P,S,Ga,Ge,As,Se,In,Sn,Sb和Te; R“是Y和Z基团之间的二价桥; Z是一个协调组,任选地等于Y; 我是过渡金属; Q是卤素或烃取代基; P是一个抗衡离子; 我是0或1; j为1-3; jj是0-2; k为1-3; 和l是0-2。
摘要:
A new class of heterocyclic metallocenes, a catalytic system containing them and a process for polymerizing addition polymerizable monomers using the catalytic system are disclosed; the heterocyclic metallocenes correspond to the formula (I): YjR″iZjjMeQkPl wherein Y is a coordinating group containing a six π electron central radical directly coordinating Me, to which are associated one or more radicals containing at least one non-carbon atom selected from B, N, O, Al, Si, P, S, Ga, Ge, As, Se, In, Sn, Sb and Te; R″ is a divalent bridge between the Y and Z groups; Z is a coordinating group, optionally being equal to Y; Me is a transition metal; Q is halogen or hydrocarbon substituents; P is a counterion; i is 0 or 1; j is 1-3; jj is 0-2; k is 1-3; and l is 0-2.
摘要:
The present invention relates to organometallic transition metal compounds of the formula (I) Z1AnZ2MXm (I) where Z1 is a coordinating group which comprises a six-π-electron central group which coordinates directly to M, A is a divalent bridge between the groups Z1 and Z2, Z2 is a coordinating group having the same meaning as Z1 or is a group comprising an open pentadienyl, a cyclopentadienyl-containing group or a heterocyclic, 5- or 6-membered group containing six π electrons, n=zero or 1, M is an element of group 3, 4, 5 or 6 of the Periodic Table of the Elements, the radicals X are identical or different and are each an organic or inorganic radical, m is 0, 1 or 2, and at least one of the three molecule fragments Z1, Z2 and A bears a monovalent organic radical.
摘要:
A new class of heterocyclic metallocenes, a catalytic system containing them and a process for polymerizing addition polymerizable monomers using said catalytic system are disclosed; the heterocyclic metallocenes correspond to the formula (I): YjR″iZjjMeQkPl wherein Y is a coordinating group containing a six π electron central radical directly coordinatng Me, to which are associated one or more radicals containing at least one non-carbon atom selected from B, N, O, Al, Si, P, S, Ga, Ge, As, Se, In, Sn, Sb and Te; R″ is a divalent bridge between the Y and Z groups; Z is a coordinating group, optionally being equal to Y; Me is a transition metal; Q is halogen or hydrocarbon substituents; P is a counterion; i os 0 or 1; j is 1-3; jj is 0-2; k is 1-3; and l is 0-2.
摘要翻译:公开了一类新的杂环金属茂,含有它们的催化体系和使用所述催化体系聚合加成聚合单体的方法; 所述杂环金属茂对应于式(I):Y Z i R Z Z 其中Y是含有直接配位于Me的六个π电子中心基团的配位基团,其中与一个或多个选自B,N,O,Al的至少一个非碳原子相连; ,Si,P,S,Ga,Ge,As,Se,In,Sn,Sb和Te; R“是Y和Z基团之间的二价桥; Z是一个协调组,任选地等于Y; 我是过渡金属; Q是卤素或烃取代基; P是一个抗衡离子; 我os 0或1; j为1-3; jj是0-2; k为1-3; 和l是0-2。
摘要:
A metallocene compound of formula (I) wherein M is zirconium, hafnium or titanium; X is hydrogen, halogen, or a hydrocarbyl radical optionally containing heteroatoms; R2, R3, R4 and R5, are hydrogen or hydrocarbyl radicals; R6 is a hydrocarbyl radical; L is a divalent bridging group T is a radical of formula (II), (III), (IV) or (V), wherein R8 and R9 are a hydrogen atom or a hydrocarbyl radical. with the proviso that at least one group among R1, R5, R6 and R8 is a group of formula C(R11)2R12 wherein R11, equal to or different from each other, is an hydrocarbyl radical; and R12 is hydrogen or an hydrocarbyl radical. These compounds are fit for the preparation of propylene copolymers.
摘要翻译:式(I)的茂金属化合物,其中M是锆,铪或钛; X是氢,卤素或任选地含有杂原子的烃基; R 2,R 3,R 4和R 5是氢或烃基; R 6是烃基; L是二价桥联基团T是式(II),(III),(IV)或(V)的基团,其中R 8和R 9是氢原子或烃基。 条件是R 1,R 5,R 6和R 8中的至少一个基团是式C(R 11)2 R 12基团,其中R 11, 相同或不同的是烃基; 并且R 12是氢或烃基。 这些化合物适用于制备丙烯共聚物。
摘要:
The present invention relates to a process for preparing heterocyclic ketones of the formulae (I) and (la), by reacting a heterocyclic compound of the formula (II), with an α,β-unsaturated carboxylic acid of the formula (III), or with its anhydride of the formula (IV), where R1 is hydrogen or a C1-C40 carbon-containing group, R2 is hydrogen or a C1-C40 carbon-containing group, or R1 and R2 together form a cyclic ring system, R3 is a C1-C40 carbon-containing group and X is an element of the 16th group of the Periodic Table or is a divalent nitrogen group —(N—R4)—, where R4 is an electron-withdrawing radical which is selected from the group consisting of perhalogenated C1-C40 carbon-containing radicals and C1-C40 organosulfonyl groups.
摘要:
The concept of “renderers” and “translators” is introduced in connection with bidirectional conversion between object models and XML. A renderer embodies the logic responsible for mediating the parser specific APIs for reading and writing XML. It utilizes a plurality of translator objects, which embody the mapping information needed to convert the XML into object model instances. The translator objects themselves do not contain “knowledge” of parser implementations; thus, the translators are common and can be shared and reused by any and all renderer implementations. Since each translator embodies the knowledge and rules regarding how to convert an XML model to an object model, and how to convert object models to XML, it is thus independent of the particular renderer that is being used, whether it be SAX, DOM, or some other renderer.
摘要:
A method, system and computer program for creating a digital workflow associated with the completion of a paper form is provided. An electronic clipboard includes a panel for receiving a paper form, a computer including a clipboard computer application, and an input device that completes the paper form with handwritten input data and also created digital signals corresponding to the handwritten input data. The computer application interprets the digital signal data so as to define digital input data, which corresponds to the handwritten input data. The electronic clipboard also includes verification/correction facility that enables the display of the digital input data and verification and correction thereof using a series of input devices provided on the electronic clipboard. The electronic clipboard is linked to a remote computer. The remote computer includes a forms creation and management application for the creation of the electronic forms, and definition of rules for processing digital input data includes in the various fields of the electronic forms. In a server implementation of the invention, the remote computer is an application server that provides access to a plurality of software utilities for processing the digital input data included in the electronic forms. The application server enables processes such as financial transactions associated with electronic forms, transmission of selected digital input data to other computer systems, and field level encryption. Another aspect of the invention is a point of sale device that include the electronic clipboard.