Abstract: A two-stage cascade polymerization process for the production of multimodal polyethylene film resins with improved bubble stability is provided. The process comprises polymerizing ethylene or a mixture of ethylene and a C4-8 ?-olefin in two reactors arranged in series using a mixed single-site catalyst comprised of a bridged and a non-bridged indenoindolyl transition metal complex to form a multimodal polyethylene resin comprised of a lower molecular weight, higher density component and a higher molecular weight, lower density component.

Abstract: A thick film and process to prepare polyethylene useful for the film are disclosed. Ethylene is polymerized in two reaction zones with a C6-C10 ?-olefin in the presence of a catalyst system comprising an activator, a supported bridged zirconium complex, and a supported non-bridged zirconium complex. The process yields medium density to linear low density polyethylene having a melt index from 0.20 to 1.0 dg/min. Thick films from the polyethylene have a superior combination of high impact strength and high modulus.

Abstract: A slurry process for polymerizing ethylene is disclosed. The process comprises polymerizing ethylene in the presence of an ?-olefin, hydrogen, and a catalyst comprising an activator and a supported, dimethylsilyl-bridged bis(indenoindolyl)zirconium complex. The process has high catalyst activity and produces polyethylene having a broad molecular weight distribution.

Abstract: A thick film and process to prepare polyethylene useful for the film are disclosed. Ethylene is polymerized in two reaction zones with a C6-C10 ?-olefin in the presence of a catalyst system comprising an activator, a supported bridged zirconium complex, and a supported non-bridged zirconium complex. The process yields medium density to linear low density polyethylene having a melt index from 0.20 to 1.0 dg/min. Thick films from the polyethylene have a superior combination of high impact strength and high modulus.

Abstract: A two-stage cascade polymerization process for the production of multimodal polyethylene film resins with improved bubble stability is provided. The process comprises polymerizing ethylene or a mixture of ethylene and a C4-8 ?-olefin in two reactors arranged in series using a mixed single-site catalyst comprised of a bridged and a non-bridged indenoindolyl transition metal complex to form a multimodal polyethylene resin comprised of a lower molecular weight, higher density component and a higher molecular weight, lower density component.

Abstract: A process to remove metal contaminants from a hydrocarbon solution of polyethylene is disclosed. The process comprises adding a primary alcohol and a ?-diketone to a solution of polyethylene at a temperature within the range of 120° C. to 300° C. and contacting the solution with basic alumina. The process removes metal contaminants and minimizes degradation and condensation products, which can have a detrimental effect on polyethylene properties. The process provides polyethylene with low metal residues and good properties.

Abstract: A process to remove metal contaminants from a hydrocarbon solution of polyethylene is disclosed. The process comprises adding a primary alcohol and a ?-diketone to a solution of polyethylene at a temperature within the range of 120° C. to 300° C. and contacting the solution with basic alumina. The process removes metal contaminants and minimizes degradation and condensation products, which can have a detrimental effect on polyethylene properties. The process provides polyethylene with low metal residues and good properties.

Abstract: A slurry process for polymerizing ethylene is disclosed. The process comprises polymerizing ethylene in the presence of an ?-olefin, hydrogen, and a catalyst comprising an activator and a supported, dimethylsilyl-bridged bis(indenoindolyl)zirconium complex. The process has high catalyst activity and produces polyethylene having a broad molecular weight distribution.

Abstract: An ethylene polymerization process is disclosed. Ethylene is polymerized in two slurry reaction zones with a C6-C10 alpha-olefin in the presence of a single-site catalyst capable of making a high molecular weight polyolefin. The process yields medium density and linear low density polyethylene having a bimodal molecular weight distribution and a melt index from about 0.10 to about 0.80. Films from the polyethylene have superior impact properties.

Abstract: The present invention discloses a method of dispersing cyclodextrins into a base polymer. The method of the invention comprises reacting grafted microfine polymer powder with a cyclodextrin to form a cyclodextrin-attached grafted polymer, and mixing the cyclodextrin-attached grafted polymer and the base polymer for a sufficient time that the cyclodextrin-attached grafted polymer is dispersed within the base polymer. The present invention also provides several cyclodextrin-inclusion complex products formed by the method of the invention. This products include an antimicrobial polymer blend, a fragrant polymer blend, and a dyed polymer blend.

Abstract: A process for producing acid functionalized polyolefins by hydrolyzing maleic anhydride grafts using a dispersion technique is provided. Acid functionalized polyolefin powders produced by the process as well as adhesive blends formulated therewith are also disclosed.

Abstract: Adhesives useful for adhering fluoropolymers are provided. The adhesives are a blend of linear low density polyethylene, ethylene polymer plastomer, polyolefin elastomer and modified polyolefin having acid or acid derivative functionality. Composite fluoropolymer/adhesive structures are also provided.

Abstract: Adhesives useful for adhering fluoropolymers are provided. The adhesives are a blend of linear low density polyethylene, ethylene polymer plastomer, polyolefin elastomer and modified polyolefin having acid or acid derivative functionality. Composite fluoropolymer/adhesive structures are also provided.

Abstract: Disclosed is a novel bidentate pyridine transition metal catalyst having the general formula each R is independently selected from hydrogen or C1 to C6 alkyl, or C6 to C14 aryl, each R′ is independently selected from R, C1 to C6 alkoxy, C6 to C14 aryl, C7 to C20 alkaryl, C7 to C20 aralkyl, halogen, or CF3, M is a Group 3 to 10 metal, each X is independently selected from halogen, C1 to C6 alkyl, C6 to C14 aryl, C7 to C20 alkaryl, C7 to C20aralkyl, C1 to C6 alkoxy, or L is X, cyclopentadienyl, C1 to C6 alkyl substituted cyclopentadienyl, indenyl, fluorenyl, or “n” is 1 to 4; “a” is 1 to 3; “b” is 0 to 2; a+b≦3; “c” is 1 to 6; and a+b+c equals the oxidation state of M.

Abstract: Disclosed is a novel bidentate pyridine transition metal catalyst having the general formula where each R is independently hydrogen, C1-6 alkyl, or C6-14 aryl; where each R′ is independently R, C1-6 alkoxy, C7-20 alkaryl, C7-20 aralkyl, halogen, or CF3; where M is a Group 3 to 10 metal; where each X is independently halogen, C1-6 alkyl, C6-14 aryl, C7-20 alkaryl, C7-20 aralkyl, C1-6 alkoxy, or  L is X, cyclopentadienyl, C1-16 alkyl-substituted cyclopentadienyl, fluorenyl, indenyl, or  where n is an integer from 1 to 4; a is an integer from 1 to 3; b is an integer from 0 to 2; the sum of a+b≦3; c is an integer from 1 to 6; and the sum a+b+c equals the oxidation state of M.

Abstract: A process for producing acid functionalized polyolefins by hydrolyzing maleic anhydride grafts using a dispersion technique is provided. Acid functionalized polyolefin powders produced by the process as well as adhesive blends formulated therewith are also disclosed.

Abstract: Disclosed is a novel bidentate pyridine transition metal catalyst having the general formula 1

Abstract: A process for preparing boratabenzene derivatives is provided. The process includes the hydrogenation of a compound containing a boranaphthalene functional group to form a boratabenzene-containing compound. Depending on the compound containing a boranaphthalene functional group, the resulting boratabenzene compound may be converted into a catalyst suitable for olefin polymerization. A process for forming a boratabenzene derivative from a halo-dioxaborolane is also provided. In this process, a halo-dioxaborolane is reacted with a piperylide salt for form a pentadienyl dioxaborolane. The pentadienyl-dioxaborolane is reacted with a strong base to form an intermediate boratacyclohexanediene salt. The intermediate boratacyclohexanediene salt is then reacted with a trialkylaluminum compound to form an alkylboratabenzene salt.

Abstract: A process for preparing boratabenzene derivatives is provided. The process includes the hydrogenation of a compound containing a boranaphthalene functional group to form a boratabenzene-containing compound. Depending on the compound containing a boranaphthalene functional group, the resulting boratabenzene compound may be converted into a catalyst suitable for olefin polymerization. A process for forming a boratabenzene derivative from a halo-dioxaborolane is also provided. In this process, a halo-dioxaborolane is reacted with a piperylide salt for form a pentadienyl dioxaborolane. The pentadienyl-dioxaborolane is reacted with a strong base to form an intermediate boratacyclohexanediene salt. The intermediate boratacyclohexanediene salt is then reacted with a trialkylaluminum compound to form an alkylboratabenzene salt.

Abstract: A single-site olefin polymerization catalyst and method of making it are disclosed. The catalyst comprises an activator and an organometallic complex. The complex comprises a Group 3 to 10 transition or lanthanide metal, M, and at least one indenoindolyl ligand that is &pgr;-bonded to M. The key ligand is made in two steps from readily available indanones and aryl hydrazines. Reaction of its anion with a source of the metal completes a remarkably simple synthetic route to a new family of single-site olefin polymerization catalysts.