- Metallocene compound
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The present invention relates to a novel metallocene compound represented by Chemical formula 1. According to the present invention, the metallocene compound can be used when an olefin-based polymer is produced and has excellent activity. The metallocene
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Paragraph 0147-0150
(2017/01/02)
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- PROCESS FOR PRODUCTION OF MESO-FORM AND RACEMIC-FORM METALLOCENE COMPLEXES
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A method for producing an anionized meso-form double-cross-linked ligand represented by formula (3), including: bringing a compound represented by formula (1) into contact with a compound represented by formula (2) at -25°C or less; and introducing an anionizing agent within 5 hours after the contact, wherein R1 to R10 are independently a hydrogen atom, a hydrocarbon group having 1 to 20 carbon atoms, or the like; A and A' are independently a cross-linking group containing an atom belonging to the 14th group of the periodic table; M and M' are independently an atom belonging to the 1st or the 2nd group of the periodic table.
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Paragraph 0045; 0046
(2013/11/05)
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- Synthesis, characterization, and catalytic properties of ansa-zirconocenes [Zr{1-Me2Si(3-η5-C9H5R) 2}Cl2] (R = Me, nPr, nBu, and Bz)
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The ansa-indene ligands {1-Me2Si(3-C9H 6R)2} [R = Me (1), nPr (2), nBu (3), and Bz (4)] were prepared by alkylation of the unsubstituted ansa-indene. These ligands were converted, by reaction with nBuLi, to the
- Alonso-Moreno, Carlos,Antinolo, Antonio,Carrillo-Hermosilla, Fernando,Otero, Antonio,Rodriguez, Ana M.,Sancho, Jose,Volkis, Victoria,Eisen, Moris
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p. 972 - 979
(2007/10/03)
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- Perfluoronaphthyl substituted boron containing catalyst activator
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A catalyst activator particularly adapted for use in the activation of metal complexes of metals of Group 3-10 for polymerization of ethylenically unsaturated polymerizable monomers, especially olefins, comprising a neutral (Lewis acid) or charge separated (cation/anion pair) comprising a boron ligand containing a fluorinated organic group containing from 10 to 1000 non-hydrogen atoms.
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- Indenyl-amido titanium and zirconium dimethyl complexes: Improved synthesis and use in propylene polymerization
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The synthesis of a series of indenyl amido titanium dimethyl complexes, by means of the direct synthesis from the ligand, a 2-fold excess of MeLi, and TiCl4 is reported. The 1H NMR spectra of the complexes show a quartet structure for the metal-bound methyl groups, due to through-metal proton-proton coupling. Coupling of Ti-methyl protons with protons on the Cp ring is also revealed by COSY 2D-NMR. The performance of the Ti complexes in propylene polymerization, including [Me2Si(Me4C5)(t-BuN)]TiMe2 (1-TiMe2), [Me2Si(Ind) (t-BuN)]TiMe2(2-TiMe2) and six other methyl titanium complexes bearing substituted indenyl ligands, has been investigated with different cocatalysts and at different polymerization temperatures and propylene concentrations. All complexes produce amorphous polypropylene (am-PP). The catalytic activity and molecular weight strongly depend on the substitution of the Cp ring: 2-TiMe2 gives polymers of lower molecular weight, while the presence of a methyl group in position 2 (as in 3-TiMe2) determines up to 4-fold increase in molecular weight. The type of cocatalyst influences mainly the catalytic activity, the borates being better activators than MAO, but also molecular weight, with again the borates giving higher molecular weights than MAO. ΔΔE? 2-TiMe2 = 3.4 kcal mol-1, ΔΔE? 5-TiMe2 = 3.8 kcal mol-1, ΔΔE? 3-TiMe2 = 6.3 kcal mol-1. Even if all the polymers produced are amorphous, 2-TiMe2 and 5-TiMe2 show a microstructure unbalanced towards isotacticity, while 3-TiMe2, 6-TiMe2 and 8-TiMe2 are syndiotactic-enriched. Chiral induction comes mainly from a weak enantiomorphic site control.
- Resconi, Luigi,Camurati, Isabella,Grandini, Cristiano,Rinaldi, Marilisa,Mascellani, Nicoletta,Traverso, Orazio
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- ZWITTERIONIC CATALYST ACTIVATOR
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Disclosed are compounds useful as catalyst activators for olefin polymerization, comprising structures of the following formulae:wherein:L+ is a protonated derivative of an element of Group 15 of the Periodic Table of the Elements, additionally bearing two hydrocarbyl substituents of from 1 to 50 carbons each, or a positively charged derivative of an element of Group 14 of the Periodic Table of the Elements, said Group 14 element being substituted with three hydrocarbyl substituents of from 1 to 50 carbons each;R1 is a divalent linking group of from 1 to 40 non-hydrogen atoms;R2 independently each occurrence is a ligand group of from 1 to 50 nonhydrogen atoms with the proviso that in a sufficient number of occurrences to balance charge in the compound, R2 is L+-R1-;M1 is boron, aluminum or gallium;Arf independently each occurrence is a monovalent, fluorinated organic group containing from 6 to 100 non-hydrogen atoms;Y is a Group 15 element; andZ is a Group 14 element.
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- Process for preparing biscyclopentadienyl compounds
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The invention relates to a process for preparing biscyclopentadienyl compounds of the general formula by reaction of CpRa, in a first step, in accordance with the general equation and further reaction in accordance with the general equation
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- Process for the preparation of bridged, chiral metallocene catalysts of the bisindenyl type
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A process for the preparation of a compound of the formula III STR1 comprising, deprotonating a solution or suspension of an indene of the formula I STR2 in a solvent or solvent mixture containing a base to give a suspension of a metallated product of the
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- Process for preparing cyclopentadienyl group-containing silicon compound or cyclopentadienyl group-containing germanium compound
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Disclosed is a process for preparing a cyclopentadienyl group-containing silicon compound or a cyclopentadienyl group-containing germanium compound, comprising reacting (i) a lithium, sodium or potassium salt of a cyclopentadiene derivative with (ii) a silicon halide compound or a germanium halide compound in the presence of a cyanide or a thiocyanate. The cyanide or the thiocyanate is preferably a copper salt. According to the process of the invention, a cyclopentadienyl group-containing silicon compound or a cyclopentadienyl group-containing germanium compound, which is very useful for the preparation of a metallocene complex catalyst component, can be prepared in a high yield for a short period of time.
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