Abstract: There are described solid procatalysts, catalyst systems incorporating the solid procatalysts, and the use of the catalyst systems in olefin polymerization and interpolymerization.

Abstract: An active non-metallocene pre-catalyst featuring a diamine diphenolate complex and a corresponding method for catalytic polymerization, in general, and, tactic catalytic polymerization, in particular, of alpha-olefin monomers using the disclosed pre-catalyst.

Abstract: Disclosed are polymerization catalyst activator complexes prepared from the reaction of a carbenium salt and Lewis base containing an aromatic group. Also disclosed are polymerization catalyst activator complexes prepared via the reaction of a Group 13 element containing salt including a Lewis base containing an aromatic group and a tritylhalide compound. Also disclosed are polymerization catalyst systems including the activator complex of the invention, and processes for polymerizing olefin(s) utilizing same.

Abstract: A process for the polymerization of one or more alpha-olefins having at least 3 carbon atoms, which comprises contacting the monomer or monomers in a polar or non-polar solvent under polymerization conditions with a homogeneous catalyst system including (a) a cationic form of a racemic mixture of a chiral octahedral transition metal complex or of a non chiral octahedral transition metal complex, comprising 1, 2 or 3 bidentate chelating ligands and no cyclopentadienyl ligands and having C1, C2, or C3 symmetry; and (b) an anion of a Lewis acid or a Brönsted acid; and adjusting the pressure so as to obtain either a highly stereoregular polymer or copolymer or an elastomer.

Abstract: An organometallic compound obtainable by contacting a) a compound having the following formula (I): wherein Ra, Rb, Rc and Rd equal to or different from each other are hydrocarbon groups b) a Lewis acid of formula (II) MtR13   (II) wherein Mt is a metal belonging to Group 13 of the Periodic Table of the Elements (IUPAC); R1, equal to or different from each other, are selected from the group consisting of halogen, halogenated C6-C20 aryl and halogenated C7-C20 alkylaryl groups; two R1 groups can also form with the metal Mt one condensed ring. These compounds are useful as cocatalysts for polymerizing olefins.

Abstract: The invention provides an amide compound as a processing aid to improve the dispersion of silica reinforcing filler in a rubber composition, while reducing or eliminating the use of expensive bifunctional silica coupling agents. The invention further provides a vulcanizable elastomeric composition and vulcanized elastomeric products, especially pneumatic tires that exhibit decreased rolling resistance, hysteresis, and improved snow, ice, and wet traction.

Abstract: Novel catalyst systems which comprise one or more diimine nickel (II) or palladium (II) complexes, one or more cocatalysts, and aluminophosphate are disclosed. Olefin polymerization processes using those catalyst systems are also disclosed. The inclusion of aluminophosphate can improve the activity or productivity of such catalyst systems, making such catalyst systems active or more active in olefin polymerization under conditions in which they had previously been inactive or insufficiently active.

Abstract: This invention relates to a process to polymerize olefins comprising reacting olefins with a catalyst system comprising an activator, a metallocene and a second metal compound based on bidentate ligands containing heterocycle moieties.

Abstract: A propylene homopolymer or a copolymer of propylene and an &agr;-olefin with at least 4 carbon atoms, which is produced through polymerization in the presence of a metallocene catalyst and which has an increased isotactic pentad fraction and a reduced molecular weight distribution; and also a propylene-based polymer composition as prepared by adding a nucleating agent to the homopolymer or the copolymer are superior to conventional polymers and polymer compositions, as they have well-balanced toughness and heat-sealability, and are not sticky, and, in addition, they have excellent anti-blocking properties. Their films especially those for wrapping and packaging edibles are tough and have excellent anti-blocking properties, and high film impact resistance. The polymer and the polymer composition have good moldability.

Abstract: A thermoplastic aromatic polysulfone resin which is advantageous as a material for use in coating, adhesion, composite material or the like and which has a reduced viscosity (RV) of 0.36 to 0.45 dl/g and a sum total A of the number of phenolic hydroxyl groups and the number of metallic salts thereof contained in 100 repeating units of the polymer of 1.6 or more.

Abstract: This invention relates to a method to support one or more catalyst compounds comprising contacting the catalyst compounds with a pretreatment agent comprising an aluminum alkyl and or an alumoxane in solution and thereafter contacting the combination with a supported activator.

Abstract: This invention relates to preparation of a rubber composition by pre-mixing at least one rubber compounding ingredient with an organic solvent solution of at least one elastomer. The invention also contemplates the use of such rubber composition, or blend of such rubber composition with at least one additional elastomer and/or rubber compounding ingredient, as a component of an article of manufacture. Such article of manufacture may be, for example, a tire. Such article may also be an industrial product such as, for example, a hose or belt such as a conveyor belt or power transmission belt.

Abstract: This invention relates to a conjugated diene-based rubber composition reinforced with silica-based reinforcement together with a non-silane coupling agent as a combination of 1-thioglycerol(3-mercapto-1,2-propanediol) and 2,2′-benzothiazyl disulfide. Said coupling agent materials may be provided for mixing with said diene-based rubber(s), for example, as individual materials, as at least one of said materials being supported on a carbon black carrier or as being pre-reacted, or otherwise pre-treated, with synthetic silica aggregates. The invention includes an article of manufacture, including a tire, having at least one component comprised of such rubber composition.

Abstract: A rubber composition for a tire tread, or a pneumatic tire using the same in a tire tread portion, wherein the tread portion contains a diene rubber; and carbon black and/or silica; and a gas-encapsulated thermoplastic resin and, further, a short fiber, a hard particle and/or a liquid polymer, and wherein the gas-encapsulated thermoplastic resin particle is obtained by expanding, upon heating. at a temperature of an expansion starting temperature thereof or more, prior to vulcanization of a rubber, a thermally expansible thermoplastic resin particle, which comprises a thermoplastic resin having an expansion starting temperature of from 70° C. to less than 120° C. and having a heat resistance to withstand vulcanization of rubber, followed by vulcanization to uniformly disperse the gas-encapsulated thermoplastic resin in the rubber, or a short fiber, a hard particle and/or a liquid polymer is further compounded to give a high frictional force on ice.

Abstract: An olefin polymerization catalyst prepared by contacting a specified transition metal compound(A) having a cyclopentadiene type anion skeletons in its molecule with a modified aluminum oxy compound (B) obtained by reacting an aluminum oxy compound(B1) with a compound having a hydroxyl group(B2), and a process for producing an olefin polymer using the olefin polymerization catalyst.

Abstract: Polymers are produced using transition metal complexes that have sites capable of binding a Lewis acid in close proximity to the metal center.

Abstract: A method of preparing a multivalent array that includes: polymerizing at least one monomer comprising at least one polymerizable group and at least one latent reactive group in the presence of a metal carbene catalyst to form a polymer template comprising at least one latent reactive group; and combining the polymer template with at least one functionalizing reagent comprising at least one reactive group under conditions effective to react the latent reactive group of the polymer template with the reactive group of the functionalizing reagent to form a multivalent array.

Abstract: The invention relates to a catalyst system composed of metallocenes comprising substituents containing fluorine, a method for producing said system and its use for the polymerization of olefins.

Abstract: The present invention is directed to copolymers of norbornene and functional group containing norbornene comonomers and processes for the preparation thereof. These polymers may be random, alternating or block copolymers or terpolymers, etc. In general, the present invention describes a polymer composition of the formula: [A]S— and —[B]T wherein A is monomer repeat unit derived from one or more norbornene or substituted norbornene monomers and B is a monomer repeat unit derived from one or more functionalized norbornene compounds.

Abstract: A resin composition is a transparent, low-water-absorption polyolefin-based resin composition containing a sorbitol-based derivative of a particular structure, whose polyolefin-based resin having crystallinity of 0% to 20% shows haze of not more than 10%, total light transmittance of not less than 80%, when measured in accordance with ASTM D1003 using an article 3 mm thick molded therefrom as the test specimen, and shows water absorption of not more than 0.1% after 100-hour immersion in water at 23° C., or whose polyolefin-based resin comprises a cyclic olefin-based polymer comprising a cyclic olefin of a particular structure. Preferable examples of the polyolefin-based resin include the aforesaid cyclic olefin-based polymer and a polycyclohexane-based resin.