Abstract: A rubber composition contains (A) a modified conjugated diene-based polymer, (B) modified silica, and (C) a polymer having crystalline character. A crosslinked product is produced through crosslinking of the rubber composition containing the modified conjugated diene-based polymer (A), the modified silica (B), and the polymer having crystalline character (C). The crosslinked product is used for producing a tire including a tread and a sidewall, wherein at least one of the tread and the sidewall is formed of the crosslinked product.

Abstract: A tire has a tread comprising a rubber composition based on at least an elastomer matrix comprising more than 50 phr and up to 100 phr of a first diene elastomer bearing at least one SiOR function, R being a hydrogen atom or a hydrocarbon radical, and optionally, 0 to less than 50 phr of a second diene elastomer which is different from the first diene elastomer; a reinforcing filler predominately comprising a reinforcing inorganic filler, wherein the content of reinforcing inorganic filler is 20 to 200 phr; and a plasticizing agent comprising 5 to 100 phr of a liquid phosphate plasticizer having a glass transition temperature of less than ?80° C.

Abstract: The present disclosure relates to a method for preparing a supported hybrid metallocene catalyst, and the catalyst is prepared by supporting a first metallocene compound, supporting a cocatalyst by a separate-input method in which primarily adding a part at 100° C. to 150° C. and secondarily adding the rest at ?5° C. to 40° C., and then supporting a second metallocene compound, thereby improving a supporting rate of the cocatalyst in the supported catalyst and maintaining high catalytic activity. Therefore, the present disclosure can effectively prepare a polyolefin with improved processability which exhibits increased molecular weight distribution while having high morphology (reduced fine powder), high bulk density and improved settling efficiency.

Abstract: The present invention relates to an olefin-based copolymer having novel crystalline properties and capable of providing a molded article with further improved strength and impact strength when compounded with other resins, and a method for preparing the same. The olefin-based copolymer is an olefin-based copolymer comprising an ethylene repeating unit and an ?-olefinic repeating unit. The olefin-based copolymer comprises polymer fractions defined by three different peaks at a predetermined temperature when analyzed by cross-fractionation chromatography.

Abstract: The present invention relates to a polypropylene resin composition for a microporous film which can reduce the product defect rate due to stabilization of porous formation by stabilizing film formation and also can obtain a film suitably usable for a separator, a filtration membrane, a separation membrane and a filter since the microporous film can be thinned due to high rigidity, and more specifically, relates to a polypropylene resin composition for a microporous film wherein the composition comprises 5 to 30% by weight of polypropylene resin (X) having specific MFR, molecular weight distribution Mw/Mn by GPC, melt tension (MT), branching index g? and mm fraction of the propylene unit triads by 13C-NMR, satisfying specific conditions concerning gels and having a long chain branched structure and 95 to 70% by weight of polypropylene resin (Y) having a specific MFR and excluding the polypropylene resin (X).

Abstract: The invention relates to: a hybrid supported metallocene catalyst includes at least one first metallocene compound among the compounds represented by chemical formula 1, at least one second metallocene compound among the compounds represented by chemical formula 2 and a cocatalyst compound; a method for preparing an ethylene-?-olefin copolymer, comprising polymerizing olefin monomers in the presence thereof; and an ethylene-?-olefin copolymer having improved melt strength.

Abstract: The present invention relates to a polypropylene having excellent stiffness and achieving energy reduction during foaming.

Abstract: Copper clad laminates and a resin composition and a pre-preg and a laminate using the composition. The resin composition contains: (A) a prepolymer of vinyl thermosetting polyphenylene ether and a bifunctional maleimide or a multifunctional maleimide; and, (B) a polyolefin resin. Employing the prepolymer of vinyl thermosetting polyphenylene ether and the bifunctional maleimide or the multifunctional maleimide, solves the problem of incompatibility of the bifunctional maleimide or the multifunctional maleimide with the vinyl thermosetting polyphenylene ether and the polyolefin resin. An aqueous glue solution so mixed is uniform and consistent, the prepreg has a uniform expression, and a substrate resin area is free of a phase-separation problem.

Abstract: An ethylene alpha-olefin copolymer having (a) a density of from about 0.910 g/cc to about 0.940 g/cc; (b) a weight average molecular weight of from about 150,000 g/mol to about 300,000 g/mol; and (c) a melt index at a load of 2.16 kg of from about 0.01 dg/10 min. to about 0.5 dg/min.; wherein a 1 mil blown film formed from the polymer composition is characterized by (i) a Dart Impact strength greater than about 175 g/mil; (ii) an Elmendorf machine direction tear strength greater than about 20 g/mil; and (iii) an Elmendorf transverse direction tear strength greater than about 475 g/mil.

Abstract: The present invention relates to polyethylene resin having excellent impact strength, and more specifically, to polyethylene resin exhibiting excellent impact strength and flexural strength, when prepared into a molded product.

Abstract: Catalyst systems and methods for making and using the same are described. A method includes selecting a catalyst blend using a blend polydispersity index (bPDI) map. The polydispersity map is generated by generating a number of polymers for at least two catalysts. Each polymer is generated at a different hydrogen to ethylene ratio. At least one catalyst generates a higher molecular weight polymer and another catalyst generates a lower molecular weight polymer. A molecular weight for each polymer is measured. The relationship between the molecular weight of the polymers generated by each of the catalysts and the ratio of hydrogen to ethylene is determined. A family of bPDI curves for polymers that would be made using a number of ratios of a blend of the at least two catalysts for each of a number of ratios of hydrogen to ethylene.

Abstract: The present invention provides a metallocene supported catalyst that can prepare a polyolefin having excellent transparency even when processed into a film, as well as excellent processibility and mechanical properties, with high catalytic activity, and a method for preparing a polyolefin using the same.

Abstract: A gas-phase process for the homopolymerization or copolymerization of olefins carried out in the presence of a catalyst system formed by a contacting, in a liquid hydrocarbon and in the presence of hydrogen, (a) a solid catalyst component comprising Ti, Mg, and Cl, and optionally an internal electron donor compound, (b) an aluminum alkyl compound and optionally (c) an external donor compound.

Abstract: Provided are a novel metallocene compound, a metallocene-supported catalyst, and a method of preparing a polyolefin using the same. The metallocene-supported catalyst according to the present disclosure exhibits a high polymerization activity even when the metallocene compound is supported on a support, thereby showing an excellent activity and preparing a polyolefin having a high molecular weight.

Abstract: A catalyst system including the reaction product of a fluorided support (such as a fluorided silica support) that preferably has not been calcined at a temperature of 400° C. or more, an activator and at least a first transition metal catalyst compound; methods of making such catalyst systems, polymerization processes using such catalyst systems and polymers made therefrom.

Abstract: A copolymer having a structural unit derived from a conjugated diene compound and a structural unit derived from an ?-olefin having 3 to 8 carbon atoms, wherein the copolymer has a melting point within a temperature range of 0 to 10° C. and has a fusion enthalpy of 5 J/g or more as measured on a differential scanning calorimeter under the following conditions. Conditions: (1) cooling from 200° C. to ?150° C. at a rate of 10° C./min; (2) retaining at ?150° C. for 1 minute; and (3) heating from ?150° C. to 200° C. at a rate of 20° C./min.

Abstract: A copolymer having a structural unit derived from a conjugated diene compound and a structural unit derived from an ?-olefin having 3 to 8 carbon atoms, wherein the copolymer has a melting point within a temperature range of 0 to 10° C. and has a fusion enthalpy of 5 J/g or more as measured on a differential scanning calorimeter under the following conditions. Conditions: (1) cooling from 200° C. to ?150° C. at a rate of 10° C./min; (2) retaining at ?150° C. for 1 minute; and (3) heating from ?150° C. to 200° C. at a rate of 20° C./min.

Abstract: A system and method of producing polyethylene, including: polymerizing ethylene in presence of a catalyst system in a reactor to form polyethylene, wherein the catalyst system includes a first catalyst and a second catalyst; and adjusting reactor conditions and an amount of the second catalyst fed to the reactor to control melt index (MI), density, and melt flow ratio (MFR) of the polyethylene.

Abstract: Provided are a hybrid supported catalyst system and a method of preparing a polyolefin using the same. The hybrid supported catalyst system according to the present invention may be used to perform oligomerization and copolymerization of olefin monomers in a single reactor at the same time with high efficiency without a separate process of preparing alpha-olefin. Therefore, costs for preparing or purchasing comonomers which are expensive raw materials may be reduced, thereby reducing the production cost of a final product.

Abstract: Provided is a production method for an olefin-based polymer, including polymerizing an olefin raw material using (A) a transition metal compound, (B) a boron compound capable of forming an ion pair with the component (A), (C) a specific organoaluminum compound, and (D) a specific aluminoxane in presence of at least one or more kinds of (N) a nonpolymerizable unsaturated hydrocarbon in the olefin raw material or a polymerization solvent.

Abstract: Continuity compositions are provided as are methods of their preparation. The compositions comprise metal carboxylate salts and fatty amines and find advantageous use in olefin polymerization processes.

Abstract: Continuity compositions are provided as are methods of their preparation. The compositions comprise at least one metal carboxylate salt which is modified with at least one molten fatty amine. These compositions find advantageous use in olefin polymerization processes.

Abstract: The present invention relates to a preparation method of a highly active supported metallocene catalyst which can prepare a polyolefin of high bulk density. More specifically, the present invention provides a method of preparing the supported metallocene catalyst in which one or more metallocene catalysts are loaded on the silica carrier of which the inside is penetrated by more cocatalyst than the prior art and the outside is attached with a substantial amount of the cocatalyst. The catalyst according to the present invention can prepare a polyolefin polymer with improved bulk density and efficiency while maintaining its highly active catalytic characteristic.

Abstract: A supported catalyst system may include a titanated silica-containing catalyst support having at least 0.1 wt % of Ti and a specific surface area of from 150 m2/g to 800 m2/g. The Ti may be of a titanium compound of the general formula selected from RnTi(OR?)m, and (RO)nTi(OR?)m, wherein R and R? are the same or different and are selected from hydrocarbyl groups containing from 1 to 12 carbons or halogens, wherein n is 0 to 4, wherein m is 0 to 4, and wherein m+n equals 4. The supported catalyst system may include a catalyst activating agent and a metallocene. The supported catalyst system may be obtained by a process including titanating a silica-containing catalyst support with at least one vaporized titanium compound, and treating the titanated silica-containing catalyst support with a catalyst activating agent and a metallocene.

Abstract: The present invention is related to adhesive compositions comprising a polymer blend of at least two different propylene-based polymers and one or more tackifiers. The polymer blend has a melt viscosity of about 900 cP to about 19,000 cP. When subjected to Temperature Rising Elution Fractionation, the polymer blend exhibits a first fraction that is soluble at ?15° C. in xylene, the first fraction having an isotactic (mm) triad tacticity of about 70 mol % to about 90 mol %; and a second fraction that is insoluble or less soluble than the first fraction at ?15° C. in xylene, the second fraction having an isotactic (mm) triad tacticity of about 85 mol % to about 98 mol %. The tackifier has a softening point, as determined by ASTM E-28, of about 85 to about 135° C. and an aromaticity of about 2 to about 12 mol % aromatic protons.

Abstract: Copolymer of ethylene and an alpha-olefin, having a density>0.930 g/cm3,melt index (g/10 min)>4, molecular weight distribution (MWD)>3.0, and FNCT>250 hours. The copolymer is suitable for use in rotomolding applications. The copolymer possesses improved impact strength, improved permeation resistance and improved environmental stress crack resistance and may suitably be prepared by use of metallocene catalysts.

Abstract: A process for preparing a supported catalyst system comprising the following steps: a. titanating a silica-containing catalyst support having a specific surface area of from 150 m2/g to 800 m2/g, preferably 280 to 600 m2/g, with at least one vaporized titanium compound of the general formula selected from RnTi(OR?)m and (RO)nTi(OR?)m, wherein R and R? are the same or different and are selected from hydrocarbyl groups containing from 1 to 12 carbon and halogens, and wherein n is 0 to 4, m is 0 to 4 and m+n equals 4, to form a titanated silica-containing catalyst support having at least 0.1 wt % of Ti based on the weight of the titanated silica-containing catalyst support, b. treating the support with a catalyst activating agent, preferably an alumoxane. c. treating the titanated support with at least one metallocene during or after step (b).

Abstract: A catalyst component for olefin polymerization comprising magnesium, titanium, halogen and electron donor, wherein the electron donor is selected from at least one of the diol diester compounds, when the diol diester comprised contains a certain amount of isomer with Fischer projection formula as shown in Formula (II), the activity and stereospecificity of the catalyst are greatly improved, especially in the production of polymers with high melt index, the isotactic index of the obtained polymers is improved substantially.

Abstract: Olefin polymerization is carried out with a supported phosphinimine catalyst which has been treated with a long chain substituted amine compound.

Abstract: A polyethylene composition, in particular suitable for the preparation of films, and a process for preparing the same are described. The polyethylene composition of the invention comprises from 50 to 89% by weight of a first polyethylene component comprising at least one multimodal polyethylene including a plurality of ethylene polymer fractions having distinct molecular weights and comonomer contents, at least one of said plurality of ethylene polymer fractions being prepared by the use of a single site catalyst, and from 50 to 11% by weight of a second polyethylene component comprising a low or medium density polyethylene.

Abstract: Methods for controlling properties of an olefin polymer using an alcohol compound are disclosed. The MI and the HLMI of the polymer can be decreased, and the Mw and the Mz of the polymer can be increased, via the addition of the alcohol compound.

Abstract: The invention refers to a process for preparing a supported catalyst system for the polymerization of olefins comprising at least one active catalyst component on a support, the process comprising A) impregnating a dry porous support component with a mixture comprising at least one precatalyst, at least one cocatalyst, and a first solvent, such that the total volume of the mixture is from 0.8 to 2.0 times the total pore volume of the support component, and B) thereafter, adding a second solvent in an amount of more than 1.5 times the total pore volume of the support component. The invention refers further to a catalyst system made by this process and the use of this catalyst system for polymerization or copolymerization of olefins.

Abstract: Methods for controlling properties of an olefin polymer using an alcohol compound are disclosed. The MI and the HLMI of the polymer can be decreased, and the Mw and the Mz of the polymer can be increased, via the addition of the alcohol compound.

Abstract: Methods for controlling the weight ratio of a higher molecular weight component to a lower molecular weight component of an olefin polymer are disclosed. This weight ratio can be increased as polymerization reaction temperature and/or catalyst system residence time are increased.

Abstract: A catalyst composition comprising (a) a first metallocene complex represented by the general formula: where M1 is Ti, Zr or Hf, X1 and X2 are each independently F, Cl, Br, I, methyl, benzyl, phenyl, H, BH4, a hydrocarbyloxide group having up to 20 carbon atoms, a hydrocarbylamino group having up to 20 carbon atoms, a trihydrocarbylsilyl group having up to 20 carbon atoms, OBR?2 wherein R? may be an alkyl group having up to 12 carbon atoms or an aryl group having up to 12 carbon atoms, and SO3R? wherein R? may be an alkyl group having up to 12 carbon atoms or an aryl group having up to 12 carbon atoms, and Cp1 and Cp2 are each independently a substituted or unsubstituted cyclopentadienyl group, or a substituted or unsubstituted indenyl group, where any substituent on Cp1 and Cp2 is H, a hydrocarbyl group having up to 18 carbon atoms or a hydrocarbylsilyl group having up to 18 carbon atoms, (b) a second metallocene complex, (c) a non-group 4 metallocene transition-metal complex, (d) an activator or activato

Abstract: An ethylene oligomerization catalyst that oligmerizes ethylene to a series of ?-olefins and that has a Schulz-Flory constant of about 0.75 to 0.995 produces a stream of ?-olefins. This stream is then added to a vessel containing ethylene and a copolymerization catalyst that copolymerizes ethylene and ?-olefins. The resulting branched polyethylene often has good processing properties. The good processing is presumably due to the presence of “long chain branching”. Such polymers are useful for films and other packaging materials, and for molding resins for molding parts such as industrial, automotive or electrical parts.

Abstract: Disclosed herein are polymerization processes for the production of olefin polymers. These polymerization processes use a catalyst system containing three metallocene components, often resulting in polymers having a reverse comonomer distribution and a broad and non-bimodal molecular weight distribution.

Abstract: The present invention relates to a catalyst composition comprising a novel transition metal compound and a preparation method for polyolefin using the same. The catalyst composition of the present invention has high catalytic activity for polymerization of olefin-based monomers and enables it to control the fine-structure characteristics of the polyolefin, such as molecular weight distribution, in a wide range, thereby easily providing a polyolefin with desired properties.

Abstract: A catalyst composition comprising (i) a metal salt complex prepared from an imine phenol compound characterized by Structure 1: wherein O and N represent oxygen and nitrogen respectively; R comprises a halogen, a hydrocarbyl group, or a substituted hydrocarbyl group; R2 and R3 are each independently hydrogen, a halogen, a hydrocarbyl group, or a substituted hydrocarbyl group; and Q is a donor group; and (ii) a metallocene complex.

Abstract: Disclosed herein are polymerization processes for the production of olefin polymers. These polymerization processes can use a dual catalyst system containing a zirconium or hafnium based metallocene compound and a titanium based half-metallocene compound containing an indenyl group.

Abstract: A scavenger is used to indirectly control the ratio of polymer components in a polyethylene composition made using a combination catalyst comprising an inorganic chromium catalyst, and a group 4 single site catalyst.

Abstract: A polymerization catalyst system and polymerization processes using the catalyst systems are disclosed. The polymerization catalyst systems may include a) a first catalyst compound, and b) a second catalyst compound, wherein the first catalyst compound comprises a biphenyl phenol compound having essentially no hydrogen response.

Abstract: The present invention provides dual catalyst systems and polymerization processes employing these dual catalyst systems. The disclosed polymerization processes can produce olefin polymers at higher production rates, and these olefin polymers may have a higher molecular weight and/or a lower melt index.

Abstract: An ethylene-?-olefin copolymer comprising monomer units derived from ethylene and monomer units derived from an ?-olefin having 3 to 20 carbon atoms, having a density (d) of 860 to 950 kg/m3, having a melt flow rate (MFR) of 0.01 to 100 g/10 min, having a bimodal molecular weight distribution, and having a single melting peak measured by a differential scanning calorimeter (DSC).

Abstract: A supported catalyst system comprising a phosphinimine ligand containing catalyst on a porous inorganic support treated with a metal salt has improved reactor continuity in a dispersed phase reaction in terms of initial activation and subsequent deactivation. The resulting catalyst has a lower consumption of ethylene during initiation and a lower rate of deactivation. Preferably the catalyst is used with an antistatic agent.

Abstract: According to the invention, a single or plural kinds of bridged metallocene compounds having differing cyclopentadienyl-derived groups afford macromonomers that are a source of long-chain branches and simultaneously catalyze the repolymerization of the macromonomers into olefin polymers having a large number of long-chain branches, small neck-in in the T-die extrusion, small take-up surge and superior mechanical strength. The olefin polymerization catalysts and the polymerization processes can efficiently produce the olefin polymers.

Abstract: The invention generally relates to chain shuttling agents (CSAs), a process of preparing the CSAs, a composition comprising a CSA and a catalyst, a process of preparing the composition, a processes of preparing polyolefins, end functional polyolefins, and telechelic polyolefins with the composition, and the polyolefins, end functional polyolefins, and telechelic polyolefins prepared by the processes.

Abstract: Embodiments of the invention generally include multi-component catalyst systems, polymerization processes and heterophasic copolymers formed by the processes. The multi-component catalyst system generally includes a first catalyst component selected from Ziegler-Natta catalyst systems including a diether internal electron donor and a metallocene catalyst represented by the general formula XCpACpBMAn, wherein X is a structural bridge, CpA and CpB each denote a cyclopentadienyl group or derivatives thereof, each being the same or different and which may be either substituted or unsubstituted, M is a transition metal and A is an alkyl, hydrocarbyl or halogen group and n is an integer between 0 and 4.

Abstract: The invention relates to a polymerization process, the polymerization process includes contacting a cyclic bridged metallocene catalyst represented by the following formula: LA(A)LBMQn wherein A is a divalent group bound to each of LA and LB; each of LA and LB are bound to M, and each Q is bound to M; LA and LB are independently selected from the group consisting of cyclopentadienyl ligands and substituted cyclopentadienyl ligands; A is a divalent bridging group comprising a heterocyclic ring comprising from 3 to 6 carbon atoms and one silyl, thus forming a 4 to 7 member divalent ring; M is a Group 4, 5, or 6 transition metal; Q is independently a halogen, a hydride, or a hydrocarbyl radical having from 1 to 20 carbon atoms; wherein n is 1 or 2; with an activator, and optionally a support, to form an activated catalyst and, subsequently, contacting the activated catalyst with ethylene and optionally, at least one C3-C8 alpha olefin comonomer.

Abstract: The present invention provides dual catalyst systems and polymerization processes employing these dual catalyst systems. The disclosed polymerization processes can produce olefin polymers at higher production rates, and these olefin polymers may have a higher molecular weight and/or a lower melt index.