摘要:
Provided is a novel fluorene derivative which is useful as a catalyst component for olefin polymerization, a transition metal compound containing the fluorene derivative as a part of ligand, a catalyst for olefin polymerization containing the transition metal compound, and a process for producing olefin polymer. The fluorene derivative is characterized by being represented by the following general formula [I]: wherein R1, R2, R3, R5, R6, R7, R8, R9, R10, R11, R12, and R14 are each selected from hydrogen, a hydrocarbon group, and a silicon-containing group, and may be the same as or different from each other, R4 and R13 are each selected from hydrogen, a hydrocarbon group, a silicon-containing group, a sulfur-containing group, an oxygen-containing group, a nitrogen-containing group, and a halogen-containing group, and may be the same as or different from each other, and adjacent substituents of R1 to R14 may be bonded to each other to form a ring, except that the case where R4 and R5, and R12 and R13 are each bonded to each other to form a vinylene group. Also provided is a bridged metallocene compound having both of the skeleton and a cyclopentadiene skeleton.
摘要:
Provided is a transition metal compound represented by the general formula [III]: wherein R23, R24, R25, R26, R27, and R28 are each independently selected from hydrogen, a hydrocarbon group, a silicon-containing group, a sulfur-containing group, an oxygen-containing group, a nitrogen-containing group, and a halogen-containing group, adjacent substituents of R23 to R28 are optionally bonded to each other to form a ring, M is a Group 4 transition metal, Y is carbon atom, Q is selected from halogen, a hydrocarbon group, an anionic ligand and a neutral ligand capable of coordinating with a lone electron pair, which is selected in the same combination or different combination, j is an integer of 1 to 4, and Z is a fluorenylidene group comprising a fluorene derivative formula [I] or formula [II]
摘要:
The bridged metallocene compound or the olefin polymerization catalyst which comprises the compound, enables high polymerization activity in polymerizing one or more monomers selected from ethylene and α-olefins. The bridged metallocene compound contains specific substituted cyclopentadienyl and fluorenyl groups which are linked via carbon or silicon atoms. In the method for the preparation of polyolefins, one or more monomers, preferably ethylene as an essential monomer, selected from ethylene and α-olefins are copolymerized in the presence of the olefin polymerization catalyst comprising the bridged metallocene compound, so that an ethylene based polymer with an ethylene content of more than 50 mol % is obtained.
摘要:
The bridged metallocene compound or the olefin polymerization catalyst which comprises the compound, enables high polymerization activity in polymerizing one or more monomers selected from ethylene and α-olefins. The bridged metallocene compound contains specific substituted cyclopentadienyl and fluorenyl groups which are linked via carbon or silicon atoms. In the method for the preparation of polyolefins, one or more monomers, preferably ethylene as an essential monomer, selected from ethylene and α-olefins are copolymerized in the presence of the olefin polymerization catalyst comprising the bridged metallocene compound, so that an ethylene based polymer with an ethylene content of more than 50 mol % is obtained.
摘要:
The present invention provides a process for preparing a low molecular weight olefin (co)polymer having a narrow molecular weight distribution with high productivity, by polymerizing or copolymerizing an olefin in the presence of an olefin polymerization catalyst comprising (A) a specific Group 4 transition metal compound, and (B) at least one compound selected from the group consisting of (B-1) an organometallic compound, (B-2) an organoaluminum compound, (B-3) an organoaluminum oxy-compound, and (B-4) a compound which reacts with the Group 4 transition metal compound (A) to form an ion pair; and compounds useful in that process.
摘要:
The present invention provides a process for preparing a low molecular weight olefin (co)polymer having a narrow molecular weight distribution with high productivity, by polymerizing or copolymerizing an olefin in the presence of an olefin polymerization catalyst comprising (A) a specific Group 4 transition metal compound, and (B) at least one compound selected from the group consisting of (B-1) an organometallic compound, (B-2) an organoaluminum compound, (B-3) an organoaluminum oxy-compound, and (B-4) a compound which reacts with the Group 4 transition metal compound (A) to form an ion pair; and compounds useful in that process.
摘要:
The invention relates to C—H activated olefin metathesis catalyst compounds, the preparation of such compounds, and the use of such catalysts in the metathesis of olefins and olefin compounds, more particularly, the use of such catalysts in Z selective olefin metathesis reactions. In general, the catalyst compounds of the invention comprise a Group 8 metal (M), an alkylidene moiety (═CR1R2), or more generally (═(C)mCR1R2), an anionic ligand (X1), two or three neutral ligands (L1, L2, and L3) and a 2-electron anionic donor bridging moiety (Q*) that forms a chelate ring structure in conjunction with L1 and M. Such catalysts generally correspond to the formula X1(L3)kL2L1Q*M=(C)mCR1R2, wherein X1 is any anionic ligand, L1, L2, and L3 are, independently, any neural electron donor ligand, k is 0 or 1, m is 0, 1, or 2, Q* is a 2-electron anionic donor bridging moiety linking L1 and M, M is a Group 8 transition metal, and R1 and R2 are, independently, hydrogen, hydrocarbyl, substituted hydrocarbyl, heteroatom-containing hydrocarbyl, substituted heteroatom-containing hydrocarbyl, or functional groups. The invention has utility in the fields of catalysis, organic synthesis, polymer chemistry, and industrial and fine chemicals chemistry.
摘要:
An object of the present invention is to provide a novel hinge device and an electronic instrument using the hinge device which is extremely high in commercial value.A hinge device for pivoting a first member (1) and a second member (2), in which a first coupling member (3) having a shaft portion (5) is provided in one of said first member (1) and said second member (2), a second coupling member (4) having a bearing hole portion (6) for bearing said shaft portion (5) is provided in the other member, said first coupling member (3) and said second coupling member (4) are coupled with each other through the shaft portion (5) to be rotatable relative to each other so that the first member (1) may be rotated through the shaft portion (5) relative to the second member (2) in any direction of right and left directions, and an excessive rotation preventing mechanism (7) for preventing relative excessive rotation of the first member (1) in any direction of the right and left directions relative to the second member (2) is provided.
摘要:
The voice-based manipulation apparatus includes a storage section for storing voice information for specifying manipulation targets. A manipulation section manipulates the manipulation target that is associated with the voice information stored in the storage section. A search section searches the voice information stored in the storage section in association with the manipulation target and presents resultant voice information. The voice-based manipulation method includes storing voice information for specifying manipulation targets in a storage section; manipulating the manipulation target which is associated with the voice information stored in the storage section; and searching the voice information stored in the storage section in association with the manipulation target.
摘要:
A switching system comprises a time division switch for forming a fixed path through which a line circuit and a trunk circuit are connected to each other. Both the line circuit and the trunk circuit have a discrimination function and a transfer function. For example, when the trunk circuit receives system data packets including predetermined system data packets from a call processor, the trunk circuit discriminates the predetermined system data packets from the system data packets using an identifier of each packet. The predetermined system data packets are transferred to the line circuit through the fixed path of the time division switch. Receiving the predetermined system data packets from the trunk circuit, the line circuit stores the predetermined system data as well as system data for the trunk circuit received from the call processor into a memory thereof. Using the predetermined system data and the system data for the trunk circuit stored in the memory, the line circuit processes communication information packets received from the terminal or the network.