Abstract: A phthalate-free procatalyst composition is disclosed for olefin polymerization that exhibits excellent polymerization activity and response to hydrogen, and can produce a polyolefin exhibiting high stereoregularity, high melt flow rate, and desirable molecular weight distribution. The method for producing the procatalyst composition includes reaction of a magnesium support precursor with a tetravalent titanium halide and a combination of different internal electron donors. The first internal electron donor may comprise one or more substituted phenylene aromatic diester and the second internal electron donor may comprise a polyether, preferably a 1,3-diether. In one embodiment, the support precursor comprises a spherical spray crystalized MgCl2-EtOH adduct.

Abstract: A phthalate-free procatalyst composition is disclosed for olefin polymerization that exhibits excellent polymerization activity and response to hydrogen, and can produce a polyolefin exhibiting high stereoregularity, high melt flow rate, and desirable molecular weight distribution. The method for producing the procatalyst composition includes reaction of a magnesium support precursor with a tetravalent titanium halide and a combination of different internal electron donors. The first internal electron donor may comprise one or more substituted phenylene aromatic diester and the second internal electron donor may comprise a polyether, preferably a 1,3-diether. In one embodiment, the support precursor comprises a spherical spray crystalized MgCl2-EtOH adduct.

Abstract: Olefin polymerization catalysts or catalyst systems comprising a mixture, contact product, reaction product or complex comprising as elements or components: (A) at least one metallocene pre-catalyst compound or polymerization active metallocene compound; (B) at least one titanium containing metallocene compound; and when (A) is a metallocene pre-catalyst compound, (C) at least one activator; provided however: (I) the titanium-containing metallocene compound is inactive or substantially inactive for the polymerization of olefins prior to or concurrently with the use of the catalyst system for olefin polymerization.

Abstract: Olefin polymerization catalysts or catalyst systems comprising a mixture, contact product, reaction product or complex comprising as elements or components: (A) at least one metallocene pre-catalyst compound or polymerization active metallocene compound; (B) at least one titanium containing metallocene compound; and when (A) is a metallocene pre-catalyst compound, (C) at least one activator; provided however: (I) the titanium-containing metallocene compound is inactive or substantially inactive for the polymerization of olefins prior to or concurrently with the use of the catalyst system for olefin polymerization.

Abstract: 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 ? 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.

Abstract: 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-?-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 ? 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.

Abstract: A metallocene compound of formula (I) wherein M is zirconium titanium or hafnium; X is hydrogen, halogen or an hydrocarbon group; R4, R5, R6, R7, R8, R9, R10, and R11, R12 and R13 are hydrogen atoms, or C1-C40 hydrocarbon radicals optionally containing heteroatoms belonging to groups 13-17 of the Periodic Table of the Elements; R1 and R2, equal to or different from each other, are linear or branched, C1-C20-alkyl radicals, and R3 is a C1-C40 hydrocarbon radical optionally containing heteroatoms belonging to groups 13-17 of the Periodic Table of the Elements;

Abstract: A catalyst system obtained by reacting at least one chiral transition metal compound and at least one cocatalyst, where the chiral transition metal compound is a transition metal compound of formula (Ia) or one of its enantiomers of the formula (Ia*), where M is an element of Group 4, Z are each halogen, hydrogen, C1-C10-alkyl, C6-C14-aryl, alkylaryl or arylalkyl having from 1 to 4 carbon atoms in the alkyl part and from 6 to 10 carbon atoms in the aryl part, n1 and n2 are each 0 or 1, R1 and R2 are each a C1-C40 radical, or R1 and R2 together with the atoms connecting them form a cyclic or polycyclic ring system, R5 and R6 are each hydrogen or a C1-C40 radical, R10, R11 are each hydrogen, t-butyl or phenyl, R12 are each t-butyl or phenyl, and R13 are each hydrogen or a C1-C40 radical.

Abstract: 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 ?, ?-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.

Abstract: The present invention relates to a process for preparing olefin polymers having a molar mass Mw of from 500 to 50 000 g/mol by polymerization or copolymerization of at least one olefin of the formula Ra—CH?CH—Rb, where Ra and Rb are identical or different and are each a hydrogen atom or a hydrocarbon radical having from 1 to 20 carbon atoms, or Ra and Rb together with the atoms connecting them can form a ring, at a temperature of from ?60 to 200° C. and a pressure of from 0.

Abstract: The present invention relates to organometallic transition metal compounds of the formula (I), a catalyst composition comprising at least one of the organometallic transition metal compound and an olefin polymerization process in the presence of one of the catalyst composition.

Abstract: The present invention relates to organometallic transition metal compounds of the formula (I)

Abstract: 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 ? 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.

Abstract: 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 hydrocarbil 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.

Abstract: Audible ring, which is provided to all line appearances, is detected and used to determine whether or not a far end party has answered, i.e., answer supervision, for equipment connected to the line appearance which requires answer supervision for proper operation. The line appearance is monitored to detect ringing tone received at the line appearance within a first period of time from call origination. If ringing tone is not detected at the line appearance within the first period of time, receipt of answer supervision is indicated. If ringing tone is detected at the line appearance within the first period of time, the timing for the first period of time is canceled and timing for a second period of time is started from the cancellation of timing for the first time period.

Abstract: A class of metallocene compounds is disclosed having general formula (I) wherein Y is a moiety of formula (II) wherein A, B, and D, same or different from each other, are selected from an element of the groups 14 to 16 of the Periodic Table of the Elements (new IUPAC version), with the exclusion of nitrogen and oxygen; R1, R2, R3, R4 and R5 are hydrogen or hydrocarbon groups, Z is selected from a moiety of formula (II) as described above and from a moiety of formula (III) wherein R6, R7, R8 and R9, are hydrogen or hydrocarbon groups; L is a divalent bridging group; M is an atom of a transition metal selected from those belonging to group 3, 4, 5, 6 or to the lanthanide or actinide groups in the Periodic Table of the Elements (new IUPAC version), X, same or different, is hydrogen, a halogen, a R10, OR10, OSO2CF3, OCOR10, SR10, NR102 or PR102 group, wherein the substituents R10 are hydrogen or alkyl groups; p is an integer of from 1 to 3, being equal to the oxidation state of the metal M minus 2.

Abstract: A class of metallocene compounds is disclosed having the general formula (I): wherein Y is a moiety of formula (II) wherein A, B and D, same or different from each other, are selected from an element of the groups 14 to 16 of the Periodic Table of the Elements (new IUPAC version), with the exclusion of nitrogen and oxygen; R1, R2, R3, R4 and R5 are hydrogen or hydrocarbon groups, Z is selected from a moiety of formula (II) as described above and from a moiety of formula (III): wherein R6, R7, R8 and R9, are hydrogen or hydrocarbon groups; L is a divalent bridging group; M is an atom of a transition metal selected from those belonging to group 3, 4, 5, 6 or to the lanthanide or actinide groups in the Periodic Table of the Elements (new IUPAC version), X, same or different, is hydrogen, a halogen, a R10, OR10, OSO2CF3, OCOR10, SR10, NR102 or PR102 group, wherein the substituents R10 are hydrogen or alkyl groups; p is an integer of from 0 to 3, being equal to

Abstract: New metallocene compounds are described where the ligand contains at least one open-pentadienyl containing radical characterized by a cyclic or acyclic, six &pgr; electron, delocalized, five atomic center structure. These metallocenes can advantageously be used in catalyst systems for the polymerization of olefins to generate a wide variety of different polymers including HDPE, LLDPE, ethylenelpropylene/(diene) elastomers, tactiospecific C3+&agr;-olefin polymers, intimate mixture thereof and the like.

Abstract: This invention is for a metallocene catalyst component comprising a bridged metallocene in which the two substituted indenyl rings are complexed to a metal hydrocarbyl or metal halide. This metallocene catalyst component is useful for polymerizing olefins having three or more carbon atoms to produce a polymer with a isotactic stereochemical configuration. The catalyst component is a stereorigid metallocene described by the formula: R″(CpR2C4R4)(CpR′2C4R′4)MeQk wherein (CpR2C4R4) and (CpR2C4R4) are substituted indenyl rings; each R and R′ is a hydrogen or a hydrocarbyl radical having 1-20 carbon atoms; R″ is a structural bridge between the two indenyl rings imparting stereorigidity to the indenyl rings; Me is a transition metal; and each is a hydrocarbyl radical or is a halogen. Further, one R and R′ is a hydrocarbyl radical having 1-20 carbon atoms in a proximal position adjacent to the bridgehead carbon of the indenyl rings.

Abstract: The invention is a process for using a metallocene catalyst system in polymerization of olefins. The metallocene is contacted with the Lewis acid. The aluminum alkyl is contacted with the olefin. The two mixtures are contacted with each other under polymerization conditions.