Abstract: It is known to polymerize olefins using transition metal complexes and/or compounds. There is an ongoing search for catalysts for olefin polymerization which do not rely on transition metals as the active center. The present invention provides novel aluminum phosphinimine complexes which are useful in the polymerization of olefins.

Abstract: A transition metal compound of the following formula (1) as catalyst component for the production of an aromatic vinyl compound polymer or an aromatic vinyl compound-olefin copolymer: wherein A is specified unsubstituted or substituted benzindenyl group, and B, M, Y, and X are as specified.

Abstract: Boron trifluoride can be recovered in a reusable state by a method that is economical and does not cause environmental pollution, which method comprises the steps of bringing a fluid containing boron trifluoride or its complex into contact with metal fluoride so as to selectively adsorb and remove boron trifluoride in the complex and heating the resultant metal tetrafluoroborate at a temperature in the range of 100 to 600° C. to separate it into boron trifluoride and metal fluoride. By applying the method to a process for producing polybutene or olefin oligomer using boron trifluoride complex catalyst, the catalyst can be recovered with retaining its activity and reused effectively.

Abstract: Disclosed is a process for preparing a hydrogenated C9 petroleum resin, the process comprising hydrogenating a C9 petroleum resin obtained by polymerizing polymerizable monomers of a C9 fraction using a non-phenolic Friedel-Crafts catalyst in the presence or absence of a non-phenolic molecular weight modifier. The hydrogenated C9 petroleum resin obtained according to the present invention retains the characteristics of known hydrogenated C9 petroleum resins and has high thermal stability, good light resistance, and remarkably low fluorescence.

Abstract: A polyethylene having the following properties: an annealed density D/weight average molecular weight Mw relationship defined by the equation D>1104.5Mw−0.0116, and a Charpy Impact I/High Load Melt Index H relationship defined by the equation I>35.OH−0.4. Also, a polyethylene film having the following properties: a density of at least 957 kg/m3; a Dart Impact of at least 130 g; and a polydispersity of less than 12. Both may be made using a tridentate nitrogen-containing transition metal polymerization catalyst.

Abstract: A catalyst system for polymorization of C2-C12-alk-1-eres, comprising A) an organic or inorganic support, B) at least one metallocene complex, C) oligomeric aluminum oxide compounds and D) at least one boron compound of the formula I  or a cyclic boron compound of the formula II  or mixtures of boron compounds I and II.

Abstract: An olefin polymerization process is described. The process comprises preparing a catalyst system by premixing a first organoaluminum with a supported boraaryl catalyst and then polymerizing an olefin in the presence of the premixed supported catalyst, an activator and a second organoaluminum. The process produces polyolefins having broad and/or bimodal molecular weight distributions compared to the process in which either the first or the second organoaluminum is not used.

Abstract: The described invention provides a low fouling, high particle density polymerization process and an olefin polymerization cocatalyst activator composition comprising a cross-linked polymer bead having a surface area of from about 1 to 20 m2/g to which are bound a plurality of non-coordinating anions, where the polymeric support comprises ligands covalently bound to the central metal or metalloid atoms of said anions, and an effective number of cationic species to achieve a balanced charge. The invention also provides an olefin polymerization catalyst compositions comprising the reaction product of a) the foregoing cocatalyst activator, and b) an organometallic transition metal compound having ancillary ligands, at least one labile ligand capable of abstraction by protonation and at least one labile ligand into which an olefinic monomer can insert for polymerization.

Abstract: Poly(cyclic conjugated diene) polymers are prepared by polymerizing a cyclic conjugated diene monomer or cyclic conjugated diene monomer and a double bond-containing monomer using a transition metal catalyst, preferably a Ni-based catalyst, in a non-polar solvent containing a basic compound or an aromatic halide solvent. The poly(cyclic conjugated diene) polymer may then be subsequently modified by reaction of at least one of the double bonds of the polymer with a modifying substance, for example hydrogen.

Abstract: Novel boron-substituted derivatives of cyclopentadiene and metal complexes thereof which are useful in the formulation of catalyst for the polymerization of olefins.

Abstract: This invention relates to a catalyst system containing bisiminopyridyl complexes of cobalt and/or iron with bulky substituents on the bisiminopyridyl ligand, to a method for the polymerization of &agr;-olefins, particularly ethylene, and to the use of the polyolefins which can be produced by said method for the production of moldings of all types.

Abstract: A process for producing a polymer of an &agr;-olefin. The process includes polymerizing one or more &agr;-olefins having at least 4 carbon atoms in the presence of a catalyst for producing polymers of olefins. The catalyst contains (A) a specific metal compound and (B) either or both of (b-1) an organoaluminum oxy compound and (b-2) an ionic compound. The polymer of an &agr;-olefin is useful as a lubricant component.

Abstract: The invention is polymerizable composition comprising

Abstract: Processes are provided that produce organo-aluminoxane compositions. Said processes comprise: desiccating a first mixture, where said first mixture comprises organo-aluminoxane molecules intermixed with a solvent, to produce a first composition, where said first composition comprises organo-aluminoxane molecules; mixing said first composition with a solvent to produce a second mixture, where said second mixture comprises organo-aluminoxane molecules and said solvent; contacting said second mixture with a insolublization agent to produce said organo-aluminoxane compositions. A polymerization process using a catalyst that comprises an organo-aluminoxane composition is also provided.

Abstract: A process for producing a polyolefin in the presence of a transition metal-containing metallocene catalyst that maintains stable operation for long periods of time without suffering from adhesion of the produced polymer to the wall of a reactor or formation of a sheet-like polymer or a massive polymer. The process utilizes a transition metal-containing metallocene catalyst and an organoaluminum compound represented by formula: R1nAl(OR2)3−n, wherein R1 represents a C1-20 alkyl group, an aryl group, hydrogen or halogen; R2 represents a C1-20 alkyl group or an aryl group; and n is a number selected from 0≦n<3, under conditions such that the temperature of the wall of a polymerization reactor, Tw (° C.), and the polymerization temperature, Tr (° C.), satisfy the relationship: 0.5<Tr−Tw<10.

Abstract: An ethylene-aromatic vinyl compound copolymer with an aromatic vinyl compound content of from 1 to less than 55% by molar fraction which contains an isotactic structure in a head-to-tail bond structure containing two aromatic vinyl compound units represented by the following formula (1): wherein Ph is an aromatic group.

Abstract: The described invention provides a low fouling, high particle density polymerization process and an olefin polymerization cocatalyst activator composition comprising a cross-linked polymer bead having a surface area of from about 1 to 20 m2/g to which are bound a plurality of non-coordinating anions, where the polymeric support comprises ligands covalently bound to the central metal or metalloid atoms of said anions, and an effective number of cationic species to achieve a balanced charge. The invention also provides an olefin polymerization catalyst compositions comprising the reaction product of a) the foregoing cocatalyst activator, and b) an organometallic transition metal compound having ancillary ligands, at least one labile ligand capable of abstraction by protonation and at least one labile ligand into which an olefinic monomer can insert for polymerization.

Abstract: A transition metal compound of the following formula (1) as catalyst component for the production of an aromatic vinyl compound polymer or an aromatic vinyl compound-olefin copolymer: 1

Abstract: A transition metal compound of the following formula (1) as catalyst component for the production of an aromatic vinyl compound polymer or an aromatic vinyl compound-olefin copolymer: wherein A is a specified unsubstituted or substituted benzindenyl group, and B, M, Y, and X are as specified.

Abstract: The present invention relates to novel complexes of (transition) metals containing ligands having phosphorus centers supporting a carbene structure or heteroalkane radical bonded to the (transition) metal.

Abstract: Supported heterometallocene catalysts wherein the support is a particulate polymeric material are provided. The catalysts have a transition metal complex containing at least one anionic, polymerization stable heteroatomic ligand associated with the transition metal and a boron activator compound deposited on the support. Polymeric supports used for the heterometallocene catalysts of the invention are homopolymers of ethylene and copolymers of ethylene and C3-8 &agr;-olefins.

Abstract: Unsaturated copolymer which is a copolymer of an &agr;olefin of 2 to 12 carbon atoms and a conjugated diene monomer represented by the following formula (I-a) and has the properties: (a) in said copolymer, 1,2-addition units (including 3,4-addition units) derived from the conjugated diene monomer (I-a) form double bonds in the side chain of the copolymer, 1,4-addition units derived from the conjugated diene monomer (I-a) form double bonds in the main chain of the copolymer, and the quantity ratio of the double bonds of the side chain derived from the 1,2-addition units to the double bonds of the main chain derived from the 1,4-addition units (side chain double bonds derived from 1,2-addition units/main chain double bonds derived from 1,4-addition units) is in the range of 10/90 to 99/1 (b) five-membered rings are present in the main chain of said copolymer; and (c) the quantity ratio of the double bonds from all of the addition units to the five-membered rings (total of double bonds from all addition units/fi

Abstract: Methods for preparing olefin polymers, and catalysts for preparing olefin polymers are disclosed. The polymers can be prepared by contacting the corresponding monomers with a Group 8-10 transition metal catalyst. The polymers are suitable for processing in conventional extrusion processes, and can be formed into high barrier sheets or films, or low molecular weight resins for use in synthetic waxes in wax coatings or as emulsions.

Abstract: An ethylene-&agr;-olefin-nonconjugated polyene random copolymer obtained by polymerizing the following components (a), (b) and (c) in the presence of a catalyst comprising a transition metal complex having at least one cyclopentadienyl skeleton and satisfying the conditions (1), (2), (3) and (4): (a) ethylene, (b) &agr;-olefin having 3 to 20 carbon atoms, and (c) one or more nonconjugated polyene at least containing a nonconjugated polyene in which at least one or more hydrogen atoms are respectively bound to all of carbon atoms having a double bond; (1) the molar ratio of a unit derived from ethylene to a unit derived from &agr;-olefin in the copolymer is 95/5 to 20/80, (2) the iodine value is 0 to 50 (g/100 g polymer), (3) the intrinsic viscosity [&eegr;] measured in xylene at 70° C. is 0.5 to 10 dl/g, and (4) the Q value (weight average molecular weight/number average molecular weight) measured by gel permeation chromatography (GPC) is 3.0 or more.

Abstract: The invention is directed to olefin polymerization processes using bridged hafnocene catalyst complexes that are surprisingly stable under high temperature olefin polymerization processes such that olefin copolymers can be prepared with high molecular weights and catalyst activities. More specifically, the invention is a polymerization process for ethylene copolymers having a melt index of about 0.850 to about 0.930 comprising contacting, under homogeneous polymerization conditions at a reaction temperature at or above 60° C. to 250° C.

Abstract: This invention relates to a novel class of polymeric resins which have a softening point ranging from about 50° C. to about 220° C. and a molecular weight ranging from about 500 to about 42,000. The resins consist essentially of the polymers which result from the polymerization reaction between dicyclopentadiene and limonene. The polymeric resins are particularly useful in improving traction of the rubber when used in tire treads.

Abstract: This invention relates to a novel class of polymeric resins which have a softening point ranging from about 50° C. to about 220° C. and a molecular weight ranging from about 500 to about 42,000. The resins consist essentially of the polymers which result from the polymerization reaction between dicyclopentadiene and limonene. The polymeric resins are particularly useful in improving traction of the rubber when used in tire treads.

Abstract: A compound useful as a catalyst activator corresponding to the formula:

Abstract: The olefin polymerization catalyst of the invention is formed from a Group IVB transition metal compound represented by the following formula (I) and an organoaluminum oxy-compound or a compound which reacts with the transition metal compound to form an ion pair.

Abstract: In a process for preparing polymers based on monomers having a C═C double bond by homopolymerization or copolymerization of these monomers in the presence of a catalyst system comprising a metallocene complex A) and a compound B) capable of forming metallocenium ions and, if desired, an organometallic compound of main group I, II or III of the Periodic Table of the Elements C), the metallocene complex A) used is a compound of the formula (I) where the substituents and indices have the following meanings: R1 to R11 are hydrogen, C1-C10-alkyl, 5- to 7-membered cycloalkyl which may in turn bear C1-C6-alkyl groups as substituents, C6-C15-aryl or arylalkyl, where two adjacent radicals R1 to R8 may together form a cyclic group having from 4 to 15 carbon atoms, or Si(R12)3, where R12 is C1-C10-alkyl, C6-C15-aryl or C3-C10-cycloalkyl, M is a metal of transition groups III to VI of the Periodic Table of the Elements or a metal of the lanthanide series, X are identical or different and are hy

Abstract: This invention relates to a novel class of polymeric resins which have a softening point ranging from about 50° C. to about 220° C. and a molecular weight ranging from about 500 to about 42,000. The resins comprise the polymers which result from the polymerization reaction between dimethyl dicyclopentadiene and limonene. The polymeric resins are particularly useful in improving traction of the rubber when used in tire treads.

Abstract: This invention relates to a polymerization process comprising combining an olefin in the gas or slurry phase with a spray dried catalyst comprising an activator, a particulate filler and a metal catalyst compound.

Abstract: In a process for preparing polymers of vinylaromatic compounds at from 0 to 150° C. in the presence of metallocene complexes as catalysts, the polymerization is carried out at a pressure of from 5 to 300 bar in the presence of aliphatic C1-C4-hydrocarbons using a coordination complex selected from the group consisting of strong, uncharged Lewis acids, ionic compounds having Lewis acid cations and ionic compounds having Bronsted acids as cations as cocatalyst.

Abstract: The present invention relates to transition metal organometallic compounds with an indenyl ligand attached in position 2 and fused in position 5,6, to a process for the production thereof and to the use thereof as catalysts for the (co)polymerization of olefinic and/or diolefinic monomers.

Abstract: A specified transition metal compound having two transition metals and two cyclopentadiene type anion skeletons in its molecule and said metals are linked through an atom of Group XVI of the Periodic Table of the Elements, an olefin polymerization catalyst component comprising said transition metal compound, an olefin polymerization catalyst comprising said transition metal compound, a specific organoaluminum compound, and a specific boron compound, and a process for producing an olefin polymer using said olefin polymerization catalyst.

Abstract: There are a number of recent developments relating to co- and homo-polymers of vinyl aromatic monomers. There are syndiotactic polymers of styrene, there are pseudo random polymers of styrene and ethylene. The present invention seeks to provide novel pseudoblock polymers of styrene and ethylene in which at least 10 weight % of the vinyl aromatic monomer is incorporated in the form of one or more atactic pseudoblocks.

Abstract: A transition metal compound of the following formula (1) as catalyst component for the production of an aromatic vinyl compound polymer or an aromatic vinyl compound-olefin copolymer: wherein A is a specified unsubstituted or substituted benzindenyl group, and B, M, Y, and X are as specified.

Abstract: It is known to polymerize olefins using transition metal complexes and/or compounds. There is an ongoing search for catalysts for olefin polymerization which do not rely on transition metals as the active center. The present invention provides novel aluminum phosphinimine complexes which are useful in the polymerization of olefins.

Abstract: This invention relates to a catalyst system comprising a substituted, bridged bisindenyl metallocene supported on a polymeric support wherein the metallocene is activated for polymerization by an ionizing reaction and stabilized in cationic form with a noncoordinating anion. A protonated ammonium salt of a noncoordinating amine is covalently bonded to the support. Propylene polymers produced by these supported catalyst systems have melting points and polymer microstructures similar to propylene polymers produced using analogous unsupported catalyst systems.

Abstract: A liquid phase polymerization process is provided for producing a polyolefin elastomer, e.g., one derived from ethylene, another &agr;-olefin such as propylene and optionally, a diene, employing a metallocene catalyst. The process comprises contacting monomer under liquid phase polymerization conditions with a catalyst composition obtained by combining (a) a metallocene procatalyst, preferably one containing a bridging group possessing at least two bulky groups, and (b) a cocatalyst such as aluminoxane, preferably a cation-generating cocatalyst, in partial or total replacement of aluminoxane.

Abstract: A supported olefin polymerization catalyst system and a method of making it are disclosed. The catalyst system comprises: (a) a support chemically treated with an organoaluminum, organosilicon, organomagnesium, or organoboron compound; (b) a single-site catalyst that contains a polymerization-stable, heteroatomic ligand; and (c) an activator. Chemical treatment is a key to making supported heterometallocenes that have high activity and long shelf-lives, and can effectively incorporate comonomers.

Abstract: A photocurable prepreg composition which is characterized by easy control of a B stage state of a thermosetting resin such as an unsaturated polyester resin or an epoxy acrylate resin, excellent storage stability, and remarkable curability after being shaped; as well as a production method therefor. A photocurable prepreg composition which contains an unsaturated polyester resin and/or an epoxy acrylate resin; at least two photopolymerization initiators with photosensitivity in different wavelength ranges; and an inorganic or an organic fiber-reinforcing material and/or filler, and which composition is treated with light of a specific wavelength such that at least one photopolymerization initiator and radical-polymerizable unsaturated groups remain partially in said resin; a production method therefor; and formed articles produced therefrom.

Abstract: Polymerization processes for ethylene and at least one mono-1-olefin comonomer having from about three to eight carbon atoms per molecule in the presence of a twice-aged catalyst system comprising chromium supported on a silica-titania support and a trialkylboron compound is provided. Novel ethylene copolymers also are produced.

Abstract: A process comprising polymerizing ethylene, or polymerizing ethylene and at least one other olefin, to produce a polymer is provided.

Abstract: Metallocene compounds of the formula where CpI and CpII are carbanions having a cyclopentadienyl-containing structure, D is a donor atom and A is an acceptor atom, where D and A are linked by a reversible coordinative bond in such a way that the donor group takes on a positive (partial) charge and the acceptor group takes on a negative (partial) charge, M represents a transition metal of transition group III, IV, V or VI of the Periodic Table of the Elements (Mendeleev), X is one anion equivalent and n is, depending on the charge of M, zero, one, two, three or four, are new and can be used as catalysts for the (co)polymerization of olefins, i-olefins, alkines and/or diolefins or for ring-opening polyaddition. A typical X-ray structure analysis is represented by formula 18a.

Abstract: Cycloolefin copolymers for industrial applications, with the exception of the use for optical data memories, can be prepared by copolymerization of monomers from the group consisting of cyclic olefins, .alpha.-olefins having 2 or more C atoms and optionally conjugated or non-conjugated diolefins, the catalysts employed being metallocene compounds or .pi. complex compounds of the formula ##STR1## in which CpI and CpII represent carbanions having a cyclopenadienyl-containing structure,.pi.I and .pi.II represent charged or electrically neutral .pi.

Abstract: Novel onium borates of an element of Groups 15 to 17 of the Periodic Table, or borates of an organometallic complex of an element of Groups 4 to 10 of the Periodic Table, well suited for the photochemical/electron beam cationic initiation of polymerization/crosslinking, the anionic borate moiety of which having the formula:[BX.sub.a R.sub.b ].sup.-in which a and b are integers ranging from 0 to 4 and a+b=4; the symbols X are each a halogen atom when a ranges up to 3 and an OH functional group when a ranges up to 2; and the symbols R, which may be identical or different, are each a phenyl radical substituted by at least one element or electron-withdrawing substituent or by at least two halogen atoms, or an aryl radical containing at least two aromatic ring members, or such aryl radical bearing at least one electron-withdrawing substituent.

Abstract: This invention relates to supported metallocene catalyst compositions useful for addition reactions of prochiral .alpha.-olefins. Polymers, specifically propylene polymers, produced with this catalyst possess higher stereoregularities and consequently higher melting points compared to propylene polymers produced using previously known supported metallocene catalysts. The microstructure of the polymers obtained using the supported catalyst systems of this invention is similar to that obtained using analogous unsupported catalysts. The catalyst compositions comprise transition metal (i.e., metallocene) cations and beam comprising anionic activators in prescribed ratios on metal or metalloid oxide supports. The transition metal compound is represented by the formula: ##STR1## wherein M is selected from the group consisting of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum and tungsten;R.sup.1 and R.sup.2 are identical or different, and are one of a hydrogen atom, a C.sub.1 -C.

Abstract: A catalyst system containing as active constituentsA) metal complexes of the formula I ##STR1## wherein the substituents have the meanings set forth in the specification andB) a compound capable of forming metallocenium ions.

Abstract: Complexes of lanthanides are described, which are effective in the polymerization of conjugated dienes, obtained by reacting LnX.sub.3 with at least one Lithium compound selected from:(i) Li(A), the molar ratio Li(A)/LnX.sub.3 being from 1.5 to 2.5;(ii) LiLn(A).sub.4, the molar ratio between LiLn(A).sub.4 and LnX.sub.3 being from 0.5 to 1.5;wherein Ln is selected from any of the Lanthanides; X is selected from halides, carboxylates, alcoholates, --N(R.sub.x) (R.sub.y) wherein R.sub.x and R.sub.y, the same or different, are C.sub.1 -C.sub.5 alkyl radicals;A is an allyl radical having the general formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5, the same or different, are selected from hydrogen and C.sub.1 -C.sub.10 alkyl radicals.