Abstract: The present invention provides a copolymer containing a structural unit derived from 1,3,7-octatriene and a structural unit derived from butadiene and a hydride thereof. Furthermore, the present invention provides a method of producing a copolymer containing a structural unit derived from 1,3,7-octatriene and a structural unit derived from butadiene.

Abstract: The present disclosure provides copolymers comprising from about 0.5 wt % to about 25 wt % cyclic olefin content and films comprising the copolymers. In one embodiment, a copolymer includes a C2-C40 monomer content of from about 75 wt % to about 99.5 wt %; and a C5-C40 cyclic olefin comonomer content of from about 0.5 wt % to about 25 wt %. The copolymer has a density of about 0.91 g/cm3 to about 0.933 g/cm3. Films of the present disclosure can have advantageous mechanical properties (such as melt strength) and optical properties (such as haze %).

Abstract: Artificial turf filaments formed from polyethylene are provided that can have desirable properties. In one aspect, an artificial turf filament comprises a composition comprising a first composition, wherein the first composition comprises at least one ethylene-based polymer and wherein the first composition comprises a MWCDI value greater than 0.9, and a melt index ratio (I10/I2) that meets the following equation: I10/I2?7.0?1.2×log (I2).

Abstract: The present invention provides a copolymer of 1,3,7-octatriene and isoprene having a narrow molecular weight distribution (Mw/Mn) and a hydride thereof. Furthermore, in a production method of a copolymer containing a structural unit derived from 1,3,7-octatriene and a structural unit derived from isoprene, high raw material conversions are achieved for a short polymerization time. Specifically, the copolymer is a copolymer containing a structural unit derived from 1,3,7-octatriene and a structural unit derived from isoprene and is a copolymer having a molecular weight distribution (Mw/Mn) of less than 1.44, or the like.

Abstract: A first ethylene-based interpolymer comprising, in polymerized form, monomer units derived from ethylene and from a benzocyclobutene (VBCB) structure of Structure 1; wherein n is from 3 to 10; and wherein the ethylene-based polymer comprises, in polymerized form, from 0.02 to 0.70 wt % of the Structure 1, based on the weight of the first ethylene-based interpolymer, as determined by 1H NMR is provided. Further provided is a composition which comprises a second ethylene-based inter-polymer formed by thermally treating a first ethylene-based interpolymer.

Abstract: This disclosure relates to a process for polymerization, and in particular to minimizing undesired polymerization reactions downstream of a polymerization reaction zone, for instance by use of a quenching agent that enables fast reaction rates with active polymerization catalyst in the polymerization effluent, so as to quench the catalyst quickly, thereby preventing uncontrolled polymerization reactions. A preferred quenching agent is methanol. Also provided are means for treating polymer recycle streams containing oxygenates, which may result from the use of such quench agents, particularly in polymerization processes including polyene (e.g., diene) monomers.

Abstract: Provided is an ethylene-?-olefin-nonconjugated polyene copolymer having ethylene units, ?-olefin units and nonconjugated polyene units, wherein the copolymer satisfies the following requirements: (A): the intrinsic viscosity [?] is 0.5 to 1.8 dl/g, (B): the content of ethylene units is 50 to 90 mol % and the content of ?-olefin units is 50 to 10 mol % where the sum total of the contents of ethylene units and ?-olefin units is taken as 100 mol %, (C): the iodine value is 1 to 50, (D): the ratio of tan ? taken at 100° C. and 2 cpm to tan ? taken at 100° C. and 1000 cpm is from 1.0 to 1.7, and (E): the ratio of the Z-average molecular weight to the number average molecular weight is from 15 to 25 and the weight average molecular weight to the number average molecular weight is from 3 to 5.

Abstract: A process for continuously making a terpolymer or a tetrapolymer utilizing ethylene, an alpha olefin, and at least one polyene. This process allows for the creation of products with high polyene contents and broad molecular weight distributions while utilizing a continuous flow reactor and a known catalyst. The process allows for these products to be made without gelling, or fouling of the reactor.

Abstract: A process and the resultant product from the process for continuously making an EPDM utilizing ethylene, propylene, and dienes. This process allows for the creation of products with high diene contents and broad molecular weight distributions while utilizing a continuous flow reactor and a known catalyst. The process allows for these products to be made without gelling, or fouling of the reactor, which are problems known in the art.

Abstract: The present invention discloses the use of rotoxane ligands to prepare catalyst systems suitable for the oligomerization or polymerization of ethylene and alpha-olefins.

Abstract: A complex compound comprising the skeletal unit of Formula A, wherein the ring represented by C(R1)-A1-A2-(A3)x-C(R2)—C— has delocalised unsaturation and is optionally substituted via one or more of A1, A2 and A3 with atoms or groups selected from hydrogen, alkyl, aryl, halogen, or heterocyclic groups containing at least one N, S or O in a carbon ring; A1, A2 and A3 are selected from carbon, nitrogen or oxygen, R1 and R2 are each selected from chlorine, bromine or iodine; x is zero or 1, O is oxygen, E is nitrogen, phosphorus or arsenic, Q represents a divalent bridging group comprising one or more Group 14 atoms; M is a metal selected from Groups 3 to 7; X represents a monovalent atom or group covalently or ionically bonded to M; L is a mono- or bidentate molecule datively bound to M, y satisfies the valency of M and z is from 0 to 5. The complex can be used to polymerise olefins optionally with organo-A1 or -B compounds as activator.

Abstract: A process for producing a vulcanized molded article of a rubber composition, which comprises the steps of (1) kneading, at least, 100 parts by weight of a defined ethylene-?-olefin-non-conjugated polyene copolymer rubber (A), 1 to 150 parts by weight of a reinforcement (B), and 1 to 150 parts by weight of a softener (C), (2) mixing the resultant kneaded product with 0.1 to 10 parts by weight of a vulcanizing agent (D), and (3) hot forming the resultant rubber composition; and a vibration-proof material comprising a vulcanized molded article of a rubber composition produced by the above process.

Abstract: This invention relates to the oligomerisation of olefinic compounds in the presence of an oligomerisation catalyst activated in two stages by two catalyst activators According to the invention there is provided a process for activating an oligomerisation catalyst by contacting the catalyst with i) a first activator component selected from the group consisting of the aluminoxanes and a mixture of at least one aluminoxane and at least one organylaluminium compound, and ii) a second activator component which is an organylaluminium compound, the process being characterised therein that the oligomerisation catalyst is first contacted with one of the first activator component or second activator component, and the resulting mixture is thereafter contacted with the other of the first activator component or second activator component

Abstract: Monocyclopentadienyl complexes in which the cyclopentadienyl system bears at least one bridged keto, thioketo, imino or phosphino group, a catalyst system comprising at least one of the monocyclopentadienyl complexes and a process for preparing polyolefins by polymerization or copolymerization of olefins in the presence of the catalyst system.

Abstract: Disclosed is a method of producing a polyolefin composition comprising contacting a metallocene pre-catalyst with a substoichiometric amount of a co-catalyst; adding a first olefin monomer; and polymerizing the first monomer for a time sufficient to form the polyolefin. The method allows for the use of a minimum amount of activating co-catalyst, and allows for the production of stereoregular and non-stereoregular polyolefins. The use of configurationally stable metallocene pre-catalysts allows for the production of monomodal isotactic polyolefins having narrow polydispersity. The use of configurationally unstable metallocene pre-catalysts allows for the production of monomodal atactic polyolefins having narrow polydispersity. The method of the present invention optionally further comprises contacting the polyolefin with a second amount of said co-catalyst; adding a second olefin monomer; polymerizing said second olefin monomer to form a block-polyolefin composition.

Abstract: Promoters are described for vanadium-based catalysts used in the (co)polymerization of olefins and, in particular, in the production of ethylene/propylene (EPR) or ethylene/propylene/diene (EPDM) elastomeric copolymers. The promoters of the present invention belong to the group of compounds having general formula I: wherein: “X” represents a (—CO—) carbonyl or (—SO2—) sulfonyl group; “n” is 0 or 1; R? is an alkyl or alkylaryl group having from 1 to 20 carbon atoms; R?=R?, H.

Abstract: There are provided (I) a process for producing a copolymer of ethylene, an ?-olefin having from 3 to 20 carbon atoms and optionally a polyene, which comprises the step of copolymerizing those monomers in a polymerization reactor by feeding the following components (A), (B), (C1) and (D) to the polymerization reactor: (A) a transition metal complex, (B) an organic aluminum compound, (C1) a halogen-containing compound, and (D) a Lewis base, wherein those components are fed to the polymerization reactor without a preliminary contact of (1) the component (A) with the component (B), (2) the component (A) with the component (C1), (3) the component (B) with the component (C1), and (4) the component (B) with the component (D); and (II) a process for producing said copolymer, which comprises the step of copolymerizing those monomers in a polymerization reactor (i) by feeding to the polymerization reactor the components (A), (B), (D), (C2) a halogen-containing compound, which is a derivative of an aryl group-contai

Abstract: A high-temperature solution process for polymerizing ethylene is disclosed. The polymerization is performed in the presence of a preassembled bimetallic Ziegler-Natta catalyst and an aluminum compound. Molecular modeling calculations predict that the bimetallic Ziegler-Natta catalyst will have good activity and improved stability versus traditional Ziegler-Natta catalysts. This makes the catalyst especially suitable for solution polymerization processes, which require a thermally robust catalyst.

Abstract: A description follows of random butadiene-isoprene copolymers with a trans-1,4 structure, having a butadiene/isoprene molar composition ranging from 98/2 to 32/68, the above copolymers being crystalline or amorphous depending on the isoprene content. The process for the preparation of the above copolymers is also described, in the present of a catalytic system which comprises: (a) a first component consisting of a vanadium compound selected from: (a1) compounds having general formula (Ia) VO(L)n(X)m wherein n is an integer from 1 to 3 and m ranges from zero to 2, n+m being equal to 2 or 3; (a2) compounds having general formula (Ib) V(L)p(X)q wherein p is an integer from 1 to 4, q ranges from zero to 3, the sum of p+q being equal to 3 or 4; wherein L is a bidentate ligand and X is a halogen, preferably Chlorine; (b) a second component selected from aluminoxanes and relative derivatives.

Abstract: Olefin polymers produced using components of catalysts obtained by contacting a Ti compound of formula Ti(OR)n-yXy, where n is the valence of titanium and y is a number between 1 and n, with a pre-polymer having a porosity higher than 0.3 cc/g and containing from 0.5 to 100 g of polymer per g of solid catalyst component, the pre-polymer being obtained by (co)polymerizing an olefin or a diolefin in the presence of a catalyst comprising a Ti, V, Zr or Hf compound supported on a Mg dihalide having a mean crystallite dimension lower than 30 nm.

Abstract: A catalyst obtained by contacting a transition metal compound (A) of the general formula [1]: [LpXoCpjM(N2)nM′XmLl]X′k  [1], wherein M and M′ independently represent a transition metal of Group 3 to 10; X independently represents a hydrogen atom, halogen atom, a specific hydrocarbon group or the like; Cp is a cyclopentadienyl group; L represents a group which bonds to M or M′ by lone pair of electrons or a &pgr; electron; X′ represents a counter anion; k, l, m, o and p each independently represent an integer of 0 to 5; j represents an integer of 0 to 2; n+o+p+j≦6; n represents an integer of 1 to 3; and n+l+m≦6, with an organoaluminum, and an aluminoxane and/or boron compound, or with an aluminoxane and/or boron compound, and a process for producing an addition polymerization with the catalyst.

Abstract: There are described a process for preparing catalyst components comprising vanadium, titanium, electron donor and magnesium chloride, supported or unsupported; catalyst systems incorporating the catalyst components; and the use of the catalyst systems in olefin polymerizations and interpolymerizations.

Abstract: Conjugated diolefins, optionally in combination with other unsaturated compounds which may be copolymerized with the diolefins, are polymerized by performing the polymerization of the diolefins in the presence of catalysts based on monocyclopentadienyl compounds of vanadium and alumoxanes in the presence of aromatic vinyl compounds as the solvent at temperatures of −30 C. to +80 C. By means of the process according to the invention, it is possible to straightforwardly produce solutions of polydiolefins, such as polybutadiene, having 1,2 unit contents of 10 to 30% in aromatic vinyl compounds, which solutions may then, for example, be further processed to yield ABS or HIPS.

Abstract: A catalyst precursor compound useful for the polymerization of olefins. The compound comprises a metal atom and two &pgr;-bonded aromatic ring systems which are bridged by being linked to adjacent members of a ring structure in cis fashion.

Abstract: Provided is a metallocene catalyst component for use if preparing isotactic polyolefins, which component has the general formula (I): R″ (CpR1R2R3)(Cp′R′n) MQ2 wherein Cp is a substituted cyclopentadienyl ring; Cp′ is substituted or unsubstituted fluorenyl ring; R″ is a structural bridge imparting stereorigidity to the component; R1 is a substituent on the cyclopentadienyl ring which is distal to the bridge, which distal substituent comprises a bulky group of the formula XR*3 in which X is chosen from Group IVA, and each R* is the same or different and chosen from hydrogen or hydrocarbyl of from 1 to 20 carbon atoms, R2 is substituent on the cyclopentadienyl ring which is proximal to the bridge and positioned non-vincinal to the distal substituent, and is of the formula YR#3, in which Y is chosen from Group IVA, and each R# is the same or different and chosen from hydrogen or hydrocarbyl of 1 to 7 carbon atoms, R3 is a substituent on the cyclopentadienyl ring which is pro

Abstract: Components of catalysts for the polymerization of olefins are obtained by contacting a Ti compound of formula Ti(OR)n−yXy, where n is the valence of titanium and y is a number between 1 and n, with a pre-polymer having a porosity higher than 0.3 cc/g and containing from 0.5 to 100 g of polymer per g of solid catalyst component, the pre-polymer being obtained by (co)polymerizing an olefin or a diolefin in the presence of a catalyst comprising a Ti, V, Zr of Hf compound supported on an Mg dihalide having a mean crystallite dimension lower than 30 nm.

Abstract: Olefins are homopolymerized or copolymerized in the presence of a catalyst containing a reaction product obtained from vanadium oxytrichloride and 2,2′-thiobis(6-t-butyl-4-methylphenyl), an organic aluminum compound, such as trimethylaluminum, and an ionized ionic compound, such as N,N-dimethylanilinium tetrakis(pentafluorophenyl)borate, and the like. By using this catalyst to polymerize ethylene with an &agr;-olefin, such as propylene, 1-heptene, 1-octene, and the like, or a non-conjugated diene, such as 5-ethylidene-2-norbomene, and the like, a polymer having a high degree of copolymerization is obtained.

Abstract: In a process for polymerizing dienes in a solvent comprising vinylaromatic monomers, the polymerization is carried out in the presence of a metal compound of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo or W as catalyst and a Lewis acid as cocatalyst and, if desired, an alkylating agent and, if desired, a regulator. This process can be used for preparing high-impact polystyrene, acrylonitrile-butadiene-styrene copolymers or methyl methacrylate-butadiene-styrene copolymers.

Abstract: Vanadium complex having general formula (I) (RCOO)nVXpLm  (I) wherein R is a monofunctional hydrocarbon radical having from 1 to 20 carbon atoms and from 1 to 6 halogen atoms, selected from chlorine and bromine, preferably chlorine; X is chlorine or bromine, preferably chlorine; L is an electron donor; p+n=3, 4 or 5, preferably=3; n is greater than or equal to 1; m is between 0 and 3. The preparation of the above complex is also described together with its use in the (co)polymerization of &agr;-olefins.

Abstract: Catalyst compositions include a reduced transition metal complex of structure (I) and a cocatalyst. where, L1 and L2, may be the same or different, are anionic ligands, other than cyclopentadienyl group, amido group or phosphidino group. At least L1 is able to non-covalently interact with reduced transition metal M via one or more functional groups; for example, L1 can be a phenyl group in which at least one of the ortho-positions is substituted with a functional group capable of donating electron density to the transition metal M. L1 can also be a methyl group in which one or more or the alpha-positions is substituted with a functional group capable of donating electron density to the transition metal M. X, K, and m are defined in the specification. These catalysts may be easily formed as solids and provide improved catalytic performance.

Abstract: Disclosed is a catalyst composition and a method of polymerizing vinyl chloride using it. The catalyst composition is a mixture of a vanadyl (V) catalyst having the formula and about 0.5 to about 15 moles of an alkyl aluminum cocatalyst having the formula (R′)mAl(X′)3−m per mole of said catalyst, where R is a group containing 1 to 14 carbon atoms, each X is independently selected from halogen or OR, each R′ is independently selected from alkyl from C1 to C10, each X′ is independently selected from halogen, R1 is alkyl from C1 to C10, haloalkyl from C1 to C10, alkoxyalkyl where each alkyl group is independently selected from C1 to C10, or aryl from C6 to C14, m is 1 or 2, and n is 1 to 100. Also disclosed is a method of polymerizing vinyl chloride comonomer using this catalyst.

Abstract: A catalyst comprising an organoaluminum compound and a vanadium chelate compound having the lability to cause olefins to undergo living coordination polymerization is contacted with a terminal diolefin to obtain a catalyst for living polymer production. When the above contact is:conducted in the presence of a cycloolefin or an internal olefin, the yield of a living polymer can be improved. By modifying all ends of the living polymer obtained, a telechelic olefin polymer is obtained in which all the polymer chains are modified with functional groups.

Abstract: Components of catalysts for the polymerization of olefins are obtained by contacting a Ti compound of formula Ti(OR)n−yXy, where n is the valence of titanium and y is a number between 1 and n, with a pre-polymer having a porosity higher than 0.3 cc/g and containing from 0.5 to 100 g of polymer per g of solid catalyst component, the pre-polymer being obtained by (co)polymerizing an olefin or a diolefin in the presence of a catalyst comprising a Ti, V, Zr of Hf compound supported on an Mg dihalide having a mean crystallite dimension lower than 30 nm.

Abstract: Catalytic component for the polymerization of ethylene with propylene prepared by: a) impregnation of an inert support with a solution of a compound of Vanadium having an oxidation state of between 3 and 5; b) subsequent treatment with a solution of a compound having general formula (I) RnAlXm wherein R is a C1-C20 alkyl radical, X is a halogen, n+m=3, and m is an integer between 0 and 2, the molar ratio between Aluminium in step (b) and Vanadium in step (a) being from 1/1 to 6/1.

Abstract: A cyclic olefin polymer having a small content of a catalyst residue, a production process for the same and use of the same as an optical material. Catalysts used for polymerization and/or hydrogenation reaction for forming the cyclic olefin polymer are decomposed efficiently by adding at least one compound selected from the group consisting of an &agr;-oxyacid and &bgr;-oxyacid having one hydroxyl group and one carboxyl group in the molecule and derivatives obtained by substituting hydroxyl group thereof by an alkoxyl group, and the decomposition products are removed by rendering them insoluble in a reaction solvent used for the polymerization and/or hydrogenation reaction and precipitating them efficiently.

Abstract: A process for production of an ethylene-propylene-diene-methylene (EPDM) tetrapolymer having long chain branching is described. The process comprises the step of polymerizing a monomer mixture comprising ethylene, propylene, a first diolefin monomer containing one polymerizable double bond (preferably ENB) and a second diolefin containing two polymerizable double bonds (preferably VNB) in the presence of a catalyst system. The catalyst system comprises: a catalyst comprising a compound containing vanadium +3 with the proviso that the compound does not comprise a halogen directly bound to the vanadium; a halogenated organoaluminum cocatalyst having a halogen to aluminum molar ratio in the range of from about 1 to about 2; and an activator. The branched polymer product of the present process exhibits a molecular weight distribution of less than about 3.5 and improved rheological properties and enhanced processability characteristics.

Abstract: This invention is directed to reduced oxidation state Group 4-6 metal compounds, preferably the first row metals in those groups, suitable for activation as polymerization catalysts and characterized by comprising a substituted hydrotris(pyrazolyl)borate ancillary ligand and a plurality of single or multidentate uninegative ligands, excluding cyclopentadienyl ligands. The invention includes a polymerization process characterized by comprising contacting one or more monomers polymerizable by coordination or insertion polymerization under suitable polymerization conditions with these catalyst compositions.

Abstract: The invention addresses Group 5 metal compounds suitable as polymerization catalysts characterized by comprising one Group 15 element polyanionic ancillary ligand and three single or multidentate univalent ligands comprising Group 14-16 elements bound to the Group 5 metal, but excluding cyclopentadienyl ligands. The invention Group 5 metal compounds can be generically represented by the chemical symbols [RJ]MR′3,   (1) and [(RJ)Yn(X)]MR′2  (2) where M is a Group 5 transition metal, preferably vanadium; J is a Group 15 heteroatom ligand covalently bound to M, preferably nitrogen; R is a substituted or unsubstituted aryl, hydrocarbyl or organometalloid group covalently bound to J; each R′ is, independently, a uninegative ligand, e.g.

Abstract: Process for the preparation of EP(D)M elastomeric copolymers in liquid phase, preferably in suspension of a liquid monomer, in the presence of a catalyst essentially consisting of a Vanadium compound, a cocatalyst essentially consisting of an Aluminium trialkyl, and optionally an activator, characterized in that the Aluminium trialkyl is essentially Aluminium trimethyl and the Vanadium compound, as such or prepolymerized, is selected from: (a) compounds having general formula (I) VO(L)n(X)m wherein n is an integer from 1 to 3 and m is from zero to 2, n+m being equal to 2 or 3; (b) compounds having general formula (II) V(L)p(X)q wherein p is an integer from 1 to 4, q is from 0 to 3, the sum of p+q being equal to 3 or 4; wherein L is a bidentate ligand deriving from a 1,3-diketone and X is a halogen, preferably Chlorine.

Abstract: The present invention is a process of preparing copolymers of vinyl aromatic and olefinic monomers wherein the polymerization is carried out in a dispersion in the presence of a metallocene catalyst and a dispersion aid. The dispersion aid is a styrene-diene two-block copolymer or a styrene-diene three-block copolymer. The resultant polymer is useful as a fiber, film or molding.

Abstract: Thermoplastic cycloolefin copolymers (COCs) having high tear strength and low optical attenuation, a process for their preparation, and their use as optical waveguides (optical fibers).