Abstract: The present disclosure provides cis-polycycloolefins and methods for forming cis-polycycloolefins typically having 50% or greater cis carbon-carbon double bonds comprising contacting a first cyclic hydrocarbyl monomer with a catalyst represented by Formula (I): wherein: M is a group 8 metal; Q1, Q2, and Q3 are independently oxygen or sulfur; each of R1 and R4 is a halogen; R9 is C1-C40 hydrocarbyl or C1-C40 substituted hydrocarbyl; and each of R2, R3, R5, R6, R7, R8, R10, R11, R12, R13, R14, R15, R16, R17, R18, and R19 is independently hydrogen, halogen, C1-C40 hydrocarbyl or C1-C40 substituted hydrocarbyl. In at least one embodiment, a polycyclopentene has 50% or greater cis carbon-carbon double bonds.

Abstract: Supported catalyst compositions, useful in olefin polymerization, and having improved flow properties are disclosed. The catalyst compositions may be characterized by low macro pore volume and high bulk density. Methods for preparing the catalyst compositions are also disclosed.

Abstract: A process for oligomerization of ethylene, comprising subjecting a catalyst composition to a gas phase of ethylene and conducting an oligomerization, wherein the catalyst composition comprises (a) a chromium compound, (b) a metalated ligand, and (c) an activator or cocatalyst; and catalyst composition as well as a metalated ligand.

Abstract: Pyridyldiamido transition metal complexes are disclosed for use in alkene polymerization to produce high melting point polyolefins.

Abstract: The present invention relates to preparing high 1,4-trans-polybutadiene by polymerizing 1,3-butadiene or a butadiene derivative in a non-polar solvent in the presence of a catalyst system comprising a novel bimetallic cobalt-aluminum adduct, which makes it possible to prevent gel formation, control the molecular weight of the trans-polybutadiene and increase the trans content of the trans-polybutadiene. The catalyst system comprising the novel cobalt-aluminum adduct has a high oxidation state and structural stability, and the reactivity of the catalyst is controlled using novel activation systems comprising various allyloxy aluminum compounds.

Abstract: The invention relates to catalyst compositions including at least one catalyst compound and at least one continuity additive such as poly-oxo-metal carboxylate compound and their use in the polymerization of olefins.

Abstract: Provided herein are methods for preparing vinylidene-terminated polyolefins. Further provided herein are sulfide-terminated polyolefins.

Abstract: The invention is directed to a catalyst precursor for an ethylene polymerization catalyst comprising a porous inogranic support material carrying a chromium salt and an aluminium chelate. The aluminium chelate is aluminium di(C1-C10 alkoxide)acetoacetic ester chelate for example is aluminium di(sec-butoxide)ethylacetoacetate. The chromium salt is a chromium carboxylate for example chromium (III) acetate hydroxide. The porous inorganic support material is a silica support.

Abstract: Catalyst compositions for the polymerization of olefins having improved flowability properties are provided.

Abstract: The present invention provides polymerization catalyst compositions employing half-metallocene compounds with a heteroatom-containing ligand bound to the transition metal. Methods for making these hybrid metallocene compounds and for using such compounds in catalyst compositions for the polymerization of olefins also are provided.

Abstract: Pyridyldiamido transition metal complexes are disclosed for use in alkene polymerization to produce polyolefins.

Abstract: Processes for the polymerization of olefins with extracted metal carboxylate salts are provided. The polymerization processes have increased productivity and/or increased resin bulk density.

Abstract: The present invention relates to an ethylene-alpha olefin copolymer comprising long chain branches (LCB), while having a narrow molecular weight distribution. The ethylene-alpha olefin copolymer can be prepared by a continuous solution polymerization process using an activated catalyst composition containing a Group 4 transition metal compound having a monocyclopentadienyl ligand, to which a quinoline amino group is introduced.

Abstract: Processes for the polymerization of olefins with extracted metal carboxylate salts are provided. The polymerization processes have increased productivity and/or increased resin bulk density.

Abstract: Provided herein are methods for preparing vinylidene-terminated polyolefins. Further provided herein are sulfide-terminated polyolefins.

Abstract: The present invention relates to a propylene-butene-1 random copolymer which has a butene-1 content of 1-6 mol % and a relative dispersity of butene-1, as determined according to NMR method, of greater than 98.5%. The propylene-butene-1 random copolymer of the present invention has a high relative dispersity of butene-1, as well as better transparency and heat resistance, so that it is more suitable for packaging food that may be edible after heating. Moreover, the copolymer has a lower xylene solubles content at room temperature. In addition, the present invention further relates to a method for preparing the copolymer and to a composition and an article comprising the copolymer.

Abstract: A process for introducing a catalyst powder based on a titanium compound supported on magnesium halide into a gas-phase olefin polymerization reactor, characterized in that it comprises: (a) storing the catalyst powder under an atmosphere of a liquid C3-C12 alkane; (b) withdrawing from step (a) a measured amount of said catalyst powder by means of a rotary valve; (c) transferring said metered amount of catalyst powder to a catalyst activation section by a continuous pick-up flow of a liquid C3-C12 alkane; (d) contacting the catalyst powder with a liquid phase comprising an organo-aluminum compound and optionally an external donor compound, at a temperature ranging from ?20° C. to 60° C.; (e) introducing the activated catalyst powder in one or more gas-phase olefin polymerization reactors, where a gaseous mixture comprising at least one alpha-olefin is subjected to polymerization.

Abstract: A continuity additive according to one general approach includes a substance having an ability to reduce, prevent, or mitigate at least one of fouling, sheeting, and static level of a material present in a polymerization reactor system when added to the reactor system in an effective amount, with the proviso that the substance is not a polysulfone polymer, a polymeric polyamine, or an oil-soluble sulfonic acid; and a scavenger contacted with the substance, optionally, the scavenger neutralizing water coming in contact therewith. Additional continuity additives, methods of making continuity additives, and use of continuity additives are also presented.

Abstract: Catalyst compositions for the polymerization of olefins having improved flowability properties are provided.

Abstract: The present invention relates to a polymer composition, comprising (i) a polypropylene homopolymer, (ii) a polypropylene random copolymer, prepared by copolymerization of propylene with an olefin comonomer and having an amount of olefin comonomer units of 0.2 to 5 wt %, and (iii) an elastomeric copolymer of propylene and at least one olefin comonomer, the polymer composition having a tensile modulus, determined according to ISO 527-2/1B at 1 mm/min. and 23° C., of at least 1200 MPa.

Abstract: Provided herein are methods for preparing vinylidene-terminated polyolefins. Further, provided herein are novel sulfide-terminated polyolefins of the formula: wherein R1 is a polyolefin group and R2 is hydrocarbyl; and methods for producing the same.

Abstract: Provided are a supported metallocene catalyst, a method for preparing the same and a method for preparing polyolefin using the same. The supported metallocene catalyst prepared by incorporating a metallocene compound having a ligand substituted with alkoxide or aryloxide into a conventional supported metallocene catalyst and incorporating a borate compound as a second co-catalyst exhibits considerably superior catalyst activity and easily controls molecular weight distribution, as compared to the conventional metallocene-supported catalyst.

Abstract: The present invention discloses a catalyst system consisting of a mono- or di-fluorinated metallocene catalyst component of formula and a fluorinated activating support.

Abstract: A process for cationically polymerizing olefin monomers in a reaction mixture includes the step of contacting olefin monomers and a catalytically effective amount of an initiating composition containing (A) a heterogeneous perfluoroaryl substituted Lewis acid coinitiator selected from the group consisting of open chain and cyclic aluminoxane compounds or Group 13 perfluoroaryl Lewis acid compounds of formula (III) and (B) an initiator selected from the group consisting of (i) organic compounds, (ii) halogens, (iii) interhalogens; (iv) Brönsted acids, (v) boron halides; (vi) silicon compounds; and (vii) germanium compounds. A novel initiator system is further disclosed.

Abstract: Catalyst compositions for the polymerization of olefins having improved flowability properties are provided.

Abstract: The method for producing polyolefin nanocomposites uses an aluminum nitride (AlN) nano-filler as a promoter of olefin polymerization with a metallocene catalyst. The method of making the polyolefin nanocomposites begins by combining a metallocene catalyst, such as a zirconocene catalyst, with aluminum nitride in a reactor. The reactor is then charged with toluene and methylaluminoxane, methylaluminoxane acting as a co-catalyst. The reactor is then heated at a constant temperature, and ethylene is added to the reactor to initiate polymerization of a polyethylene nanocomposite. Polymerization is then quenched by the addition of acidic methanol to the reactor, and un-reacted monomer is vented from the reactor. The resultant polyethylene nanocomposite is then washed in methanol and dried. The aluminum nitride nano-filler promotes the conversion of the olefin monomer to the polyolefin.

Abstract: Cycloolefin copolymers which are distinguished by the presence of racemic diads of repeating polycyclic units and additionally by racemic triads of repeating polycyclic units are described. These copolymers can be prepared by copolymerization of polycyclic olefins with linear olefins in the presence of metallocene catalysts which have no Cs symmetry in relation to the centroid-M-centroid plane. The novel copolymers can be used for the production of shaped articles, in particular of films.

Abstract: The present invention provides polymerization catalyst compositions employing novel heterodinuclear metallocene compounds. Methods for making these new dinuclear metallocene compounds and for using such compounds in catalyst compositions for the polymerization of olefins are also provided.

Abstract: The present invention relates to an ultrahigh-molecular-weight ethylene copolymer powder having an intrinsic viscosity (?) of 10 dl/g to 34 dl/g, obtainable by copolymerizing ethylene and at least one olefin selected from the group consisting of ?-olefins having 3 to 20 carbon atoms, cyclic olefins having 3 to 20 carbon atoms, compounds represented by the formula CH2?CHR1 wherein R1 is an aryl group having 6 to 20 carbon atoms, and linear, branched or cyclic dienes having 4 to 20 carbon atoms, wherein (1) a molded article of the copolymer powder has a haze of from 30% to 80% and (2) the copolymer powder has a bulk density of from 0.35 g/cm3 to 0.6 g/cm3.

Abstract: The present invention provides polymerization catalyst compositions employing half-metallocene compounds with a heteroatom-containing ligand bound to the transition metal. Methods for making these hybrid metallocene compounds and for using such compounds in catalyst compositions for the polymerization and copolymerization of olefins are also provided.

Abstract: Supported catalyst systems and methods of forming the same are described herein. In one specific embodiment, the methods generally include providing an inorganic support material and contacting the inorganic support material with an aluminum fluoride compound represented by the formula AlFpX3-pBq to form an aluminum fluoride impregnated support, wherein X is selected from Cl, Br and OH?, B is H2O, p is selected from 1 to 3 and q is selected from 0 to 6. The method further includes contacting the aluminum fluoride impregnated support with a transition metal compound to form a supported catalyst system, wherein the transition metal compound is represented by the formula [L]mM[A]n; wherein L is a bulky ligand, A is a leaving group, M is a transition metal and m and n are such that a total ligand valency corresponds to the transition metal valency.

Abstract: Methods of forming supported catalyst systems, supported catalyst systems and polymerization processes utilizing the supported catalyst systems are described herein. The methods generally include providing an inorganic support material and contacting the inorganic support material with a support solvent to form a support solution. The methods further include contacting the support solution with a fluorine containing compound represented by the formula AlFpX3-pBq to impregnate the fluorine containing compound within the inorganic support material and form an intermediate, wherein X is selected from Cl, Br and OH?, B is H2O, p is selected from 1 to 3 and q is selected from 0 to 6. In addition, the methods include drying the intermediate to remove the solvent therefrom and heating the intermediate at a temperature of at least about 300° C.

Abstract: Cycloolefin copolymers which are distinguished by the presence of racemic diads of repeating polycyclic units and additionally by racemic triads of repeating polycyclic units are described. These copolymers can be prepared by copolymerization of polycyclic olefins with linear olefins in the presence of metallocene catalysts which have no Cs symmetry in relation to the centroid-M-centroid plane. The novel copolymers can be used for the production of shaped articles, in particular of films.

Abstract: Provided herein are methods for preparing vinylidene-terminated polyolefins. Further, provided herein are novel sulfide-terminated polyolefins of the formula: wherein R1 is a polyolefin group and R2 is hydrocarbyl; and methods for producing the same.

Abstract: A method for treating at least one interior surface (for example, a bed wall) of a fluidized bed polymerization reactor system, including by applying a solution catalyst (preferably at least substantially uniformly and in liquid form) to each surface, and optionally (where a catalyst component of the solution catalyst comprises at least one chromium containing compound) oxidizing at least some of the applied chromium containing compound in a controlled manner.

Abstract: The present invention provides a polymerization process which is conducted by contacting an olefin monomer and at least one olefin comonomer in the presence of hydrogen and a metallocene-based catalyst composition. Polymers produced from the polymerization process are also provided, and these polymers have a reverse comonomer distribution, low levels of long chain branches, and a ratio of Mw/Mn from about 3 to about 6.

Abstract: Supported catalyst systems and methods of forming the same are described herein. In one specific embodiment, the methods generally include providing an inorganic support material and contacting the inorganic support material with an aluminum fluoride compound represented by the formula AlFpX3-pBq to form an aluminum fluoride impregnated support, wherein X is selected from Cl, Br and OH?, B is H2O, p is selected from 1 to 3 and q is selected from 0 to 6. The method further includes contacting the aluminum fluoride impregnated support with a transition metal compound to form a supported catalyst system, wherein the transition metal compound is represented by the formula [L]mM[A]n; wherein L is a bulky ligand, A is a leaving group, M is a transition metal and m and n are such that a total ligand valency corresponds to the transition metal valency.

Abstract: A method for treating at least one interior surface (for example, a bed wall) of a fluidized bed polymerization reactor system, including by applying a solution catalyst (preferably at least substantially uniformly and in liquid form) to each surface, and optionally (where a catalyst component of the solution catalyst comprises at least one chromium containing compound) oxidizing at least some of the applied chromium containing compound in a controlled manner.

Abstract: Methods of forming supported catalyst systems, supported catalyst systems and polymerization processes utilizing the supported catalyst systems are described herein. The methods generally include providing an inorganic support material and contacting the inorganic support material with a support solvent to form a support solution. The methods further include contacting the support solution with a fluorine containing compound represented by the formula AlFpX3?pBq to impregnate the fluorine containing compound within the inorganic support material and form an intermediate, wherein X is selected from Cl, Br and OH?, B is H2O, p is selected from 1 to 3 and q is selected from 0 to 6. In addition, the methods include drying the intermediate to remove the solvent therefrom and heating the intermediate at a temperature of at least about 300° C.

Abstract: Catalyst compositions for the polymerization of olefins having improved flowability properties are provided.

Abstract: The present invention provides polymerization catalyst compositions employing half-metallocene compounds with a heteroatom-containing ligand bound to the transition metal. Methods for making these hybrid metallocene compounds and for using such compounds in catalyst compositions for the polymerization and copolymerization of olefins are also provided.

Abstract: The invention relates to an aluminum phenoxide compound produced without using aromatic solvent and represented by general formula (I) below. A stabilized polymer can be produced by adding the aluminum phenoxide compound to a catalyst system or a polymerization system before or during polymerization. In the formula, A represents an alkyl group having 2 to 6 carbon atoms, a halogen atom, or methylaminoxane; B represents a hexadecyl group, a heptadecyl group, or an octadecyl group; l, m, and n represent numbers that satisfy expressions m?1, l?1, m+n=3, and l+n=3; when m or l exceeds 1, then A may be different from each other; and when the number of moles of aluminum is expressed as “t”, then t/n?1.3.

Abstract: Film formed from a polyethylene resin composition which obeys a dynamic rheological relationship at 190° C. between melt storage modulus G?, measured in Pa and at a dynamic frequency where the loss modulus G?=3000 Pa, and dynamic complex viscosity ?*100, measured in Pa·s at 100 rad/s, such that (a) G?(G?=3000)>?0.86?*100+z where z=3800, and at the same time (b) G?(G?=3000)>0.875?*100?y where y=650, and having an impact strength (DDT) of at least 250 g, measured on 15 ?m thick film (blown under conditions with BUR=5:1 and Neck Height=8×D) conditioned for 48 hours at 20°-25° C., according to ASTM D1709.

Abstract: The invention relates to a process for forming a polyalphaolefin, the process comprising the step of polymerizing at least one C8-C12 monomer, preferably a decene such as 1-decene, in the presence of an aluminoxane, an activator and a metallocene to form the polyalphaolefin, wherein the molar ratio of the aluminoxane to the metallocene is less than 250:1. The invention also relates to a process for forming a polyalphaolefin having a desired kinematic viscosity from at least one monomer in the presence of an aluminoxane, an organoboron compound and a metallocene. The process comprises the steps of, inter alia, providing a correlation between (i) the molar ratio of the aluminoxane to at least one of the organoboron compound and the metallocene, and (ii) the kinematic viscosity of the polyalphaolefin to form polyalphaolefins having predictable viscosities.

Abstract: An oxygen-bridged bimetallic complex of the general formula (I) Cp2R1M1-O-M2R22Cp??(I), wherein Cp is independently a cyclopentadienyl, indenyl or fluorenyl ligand which can be substituted, or a ligand isolobal to cyclopentadienyl, R1, R2 independently are halide, linear or branched or cyclic alkyl, aryl, amido, phosphido, alkoxy or aryloxy groups, which can be substituted, M1 is Zr, Ti or Hf, and M2 is Ti, Zn, Zr or a rare earth metal. The complex can be useful as a polymerization catalyst.

Abstract: The present invention is directed to PE-100 ethylene copolymers and pipe made thereof having a Tabor abrasion between about 0.01 and about 0.001 grams lost/1000 revolutions. These copolymers are formed by contacting ethylene with at least one mono-1-olefin comonomer having from 2 to about 10 carbon atoms per molecule in a reaction zone under polymerization conditions in the presence of a hydrocarbon diluent, a catalyst system, and a cocatalyst. Additionally, the comonomers may be selected from mono-1-olefins having 4 to 10 carbon atoms, such as, 1-hexene, 1-butene, 4-methyl-1-pentene, 1-octene, and 1-decene. Further, these ethylene copolymers may be employed to produce PE-100 pipe having both small diameters and diameters in excess of 42 inches substantially without sagging or other gravitational deformation. Copolymers of ethylene and 1-hexene are disclosed which are used to produce PE-100 pipe.

Abstract: The present invention relates to a supported catalyst composition and a method for making the supported catalyst composition and its use in a process for polymerizing olefin(s). In particular, the invention is directed to a method for making a supported catalyst composition by contacting a supported activator with a bulky ligand and a metal compound.

Abstract: Disclosed herein is a method of forming a polymer, wherein the polymer is formed by a radical polymerisation reaction initiated by a solid oxide compound.

Abstract: Polyalkenyl ether is produced by polymerizing alkenyl ether represented by the following general formula (I): CHR1?CH(OR2)??(I) wherein R1 represents a hydrogen atom or a methyl group, R2 represents a monovalent organic group, and R2 contains a silicon atom or at least one atom selected from the group consisting of elements from group 15 to group 17, in the presence of a halide of an element other than Al, or an organometallic compound of an element other than Al, and a nonionic oxygen-containing or nonionic nitrogen-containing organic compound.

Abstract: The present invention provides a polymerization process which is conducted by contacting an olefin monomer and at least one olefin comonomer in the presence of hydrogen and a metallocene-based catalyst composition. Polymers produced from the polymerization process are also provided, and these polymers have a reverse comonomer distribution, low levels of long chain branches, and a ratio of Mw/Mn from about 3 to about 6.