Abstract: A Ziegler-Natta catalyzed ethylene/alpha-olefins copolymer is provided having sporadic long chain branches and reversed comonomer composition distribution or short chain branching distribution (SCBD) in the high molecular weight fractions. According to the invention, polyethylene film made with the inventive copolymer has a balance of improved physical, optical, mechanical properties as well as processability. In one aspect, the film includes a 1% secant modulus of greater than 25,000 psi, a film haze of less than 10, a film clarity of greater than 90, a dart impart resistance of greater than 500 g/mil, and a MD tear strength of greater than 500 g/mil.

Abstract: A cast film, for use in monolayer and multilayer applications, having an outstanding inherent cling property is disclosed. Additionally, a multilayer cast film utilizing a cast film component layer prepared from a Ziegler-Natta catalyzed ethylene and alpha-olefin copolymer is disclosed, wherein the cast film component layer has a cling force of at least 200 grams-force per inch width at 200% pre-stretch, a slow puncture resistance of greater than 50 J/mm, and a TD tear strength of greater than 450 g/mil, with no cling additives present in the cast film component layer.

Abstract: What is disclosed is a Ziegler-Natta catalyzed ethylene and alpha-olefin LLDPE copolymer having a unique composition distribution and long chain-branching. The polymers of the present invention inherently exhibit outstanding melt strength with great bubble stability, sufficient flexibility, excellent gel performance, as well as desirable mechanical properties such as balanced toughness and stiffness, which are desirable properties for thick gauge film applications. Specifically, the polymers of the present invention.

Abstract: A Ziegler-Natta catalyzed ethylene/alpha-olefins copolymer is provided having sporadic long chain branches and reversed comonomer composition distribution or short chain branching distribution (SCBD) in the high molecular weight fractions. According to the invention, polyethylene film made with the inventive copolymer has a balance of improved physical, optical, mechanical properties as well as processability. In one aspect, the film includes a 1% secant modulus of greater than 25,000 psi, a film haze of less than 10, a film clarity of greater than 90, a dart impart resistance of greater than 500 g/mil, and a MD tear strength of greater than 500 g/mil.

Abstract: What is disclosed is a Ziegler-Natta catalyzed ethylene and alpha-olefin LLDPE copolymer having a unique composition distribution and long chain-branching. The polymers of the present invention inherently exhibit outstanding melt strength with great bubble stability, sufficient flexibility, excellent gel performance, as well as desirable mechanical properties such as balanced toughness and stiffness, which are desirable properties for thick gauge film applications. Specifically, the polymers of the present invention.

Abstract: The present invention relates to a polypropylene composition comprising a long chain branched polymer having high melt strength. The process for preparing the corresponding polypropylene having composition is provided comprising blending a propylene base polymer with a unsaturated polyfunctional poly(alkylsiloxane), a polyfunctional acrylate coagent, an initiator, additives such as stabilizer, acid neutralizer and antioxidants, and reactive extruding the blend to form a branched polymer composition bridged by siloxane units.

Abstract: A multilayer blown film, designed for use in heavy duty sacks manufactured by a high-speed Form-Fill-Seal packaging process, having unique heat sealing characteristics and desirable mechanical properties is disclosed. Additionally, a multilayer blown film consists of skin layers prepared from a Ziegler-Natta catalyzed ethylene and alpha-olefin copolymer with novel composition distribution, and at least one core layer that includes both HPDE and LLDPE. The multilayer blown film, with no external sealing additives present in skin layers, exhibits outstanding processability, superior tear resistance, as well as balanced stiffness and toughness.

Abstract: The present invention relates to a polypropylene composition comprising a long chain branched polymer having high melt strength. The process for preparing the corresponding polypropylene having composition is provided comprising blending a propylene base polymer with a unsaturated polyfunctional poly(alkylsiloxane), a polyfunctional acrylate coagent, an initiator, additives such as stabilizer, acid neutralizer and antioxidants, and reactive extruding the blend to form a branched polymer composition bridged by siloxane units.

Abstract: A Ziegler-Natta catalyzed ethylene/alpha-olefins copolymer is provided having sporadic long chain branches and reversed comonomer composition distribution or short chain branching distribution (SCBD) in the high molecular weight fractions. According to the invention, polyethylene film made with the inventive copolymer has a balance of improved physical, optical, mechanical properties as well as processability. In one aspect, the film includes a 1% secant modulus of greater than 25,000 psi, a film haze of less than 10, a film clarity of greater than 90, a dart impart resistance of greater than 500 g/mil, and a MD tear strength of greater than 500 g/mil.

Abstract: A Ziegler-Natta catalyzed ethylene copolymer having a novel composition distribution in which comonomers are incorporated into the high molecular weight polymer molecules and distributed evenly among the entire polyethylene chains, and a method for making the same are provided. The resins having a novel composition distribution have controlled molecular weight distribution which is narrower than conventional ZN-ethylene copolymers but broader than single-site catalyzed ethylene copolymers. The resins having a novel composition distribution exhibit a superior tear strength and impact strength.

Abstract: A cast film, for use in monolayer and multilayer applications, having an outstanding inherent cling property is disclosed. Additionally, a multilayer cast film utilizing a cast film component layer prepared from a Ziegler-Natta catalyzed ethylene and alpha-olefin copolymer is disclosed, wherein the cast film component layer has a cling force of at least 200 grams-force per inch width at 200% pre-stretch, a slow puncture resistance of greater than 50 J/mm, and a TD tear strength of greater than 450 g/mil, with no cling additives present in the cast film component layer.

Abstract: A Ziegler-Natta catalyzed ethylene copolymer having a novel composition distribution in which comonomers are incorporated into the high molecular weight polymer molecules and distributed evenly among the entire polyethylene chains, and a method for making the same are provided. The resins having a novel composition distribution have controlled molecular weight distribution which is narrower than conventional ZN-ethylene copolymers but broader than single-site catalyzed ethylene copolymers. The resins having a novel composition distribution exhibit a superior tear strength and impact strength.

Abstract: A Ziegler-Natta catalyzed ethylene copolymer having a novel composition distribution in which comonomers are incorporated into the high molecular weight polymer molecules and distributed evenly among the entire polyethylene chains, and a method for making the same are provided. The resins having a novel composition distribution have controlled molecular weight distribution which is narrower than conventional ZN-ethylene copolymers but broader than single-site catalyzed ethylene copolymers. The resins having a novel composition distribution exhibit a superior tear strength and impact strength.

Abstract: A Ziegler-Natta catalyzed ethylene copolymer having a novel composition distribution in which comonomers are incorporated into the high molecular weight polymer molecules and distributed evenly among the entire polyethylene chains, and a method for making the same are provided. The resins having a novel composition distribution have controlled molecular weight distribution which is narrower than conventional ZN-ethylene copolymers but broader than single-site catalyzed ethylene copolymers. The resins having a novel composition distribution exhibit a superior tear strength and impact strength.

Abstract: Cyclic organosilicon compounds that may be employed as an electron donor for polymerization catalyst systems, polymerization catalyst systems employing the cyclic organosilicon compounds as an electron donor, methods of making the polymerization catalyst systems, and polymerization processes to produce polyolefin are disclosed. The organosilicon compounds, which are useful as electron donors in polymerization catalyst systems for the production of polyolefins, are represented by the formula: where Q1, Q2, Q3, and Q4 may be identical or different and are each hetero-atoms selected from the group consisting of N, O, S, Si, B, and P. R1, R2, R3, and R4 may be identical or different and are each hydrocarbon-based substituents to Q1, Q2, Q3, and Q4, respectively. The subscripts i, j, m, and n are independently 0 to 3 R5 and R6 may be identical or different and are each a bridging group with a backbone chain length between the two hetero-atoms Q1 and Q3, and Q2 and Q4, respectively, 1-8 atoms.

Abstract: A process for synthesizing a catalyst component for manufacturing ethylene polymer and co-polymer. The present invention provides a process for synthesizing catalyst component (A), comprising forming a complex by contacting the solid intermediate (B) with an aluminum compound represented by formula X3-nAl(OY)n, and alkyl metal (C), wherein X is halide, Y is a hydrocarbon group or chelating carbonyl group, and wherein 1 is less than or equal to n which is less than or equal to 3, and then contacting the complex with titanium halide having formula TiX4 wherein X is halide. Solid intermediate (B) is formed by reacting magnesium metal with alkyl halide in the presence of alkoxy aluminum represented by formula Al(ORa)3, silicon halide represented by formula SiX4 and alkoxy silane represented by formula Si(ORb)4, wherein Ra and Rb are an aromatic or aliphatic alkyl group and wherein X is halide.

Abstract: Cyclic organosilicon compounds that may be employed as an electron donor for polymerization catalyst systems, polymerization catalyst systems employing the cyclic organosilicon compounds as an electron donor, methods of making the polymerization catalyst systems, and polymerization processes to produce polyolefin are disclosed. The organosilicon compounds, which are useful as electron donors in polymerization catalyst systems for the production of polyolefins, are represented by the following formula: wherein Q1 and Q2 may be identical or different and are each hetero-atoms selected from the group consisting of N, O, S, Si, B, and P, with the proviso that Q1 and Q2 cannot both be N or both be O. R1 and R2 may be identical or different and are each hydrocarbon-based substituents to Q1 and Q2, respectively. The subscripts m and n are independently 0 to 3. R3 is an aliphatic, alicyclic or aromatic group. R4 is a hydrocarbon group with 1 to 6 carbon atoms.

Abstract: A high activity magnesium-based supported catalyst component useful in a catalyst system for the compolymerization of ethylene and alpha-olefin and a process for preparing the catalyst component is described. In the process, alkoxysilane ester is contacted with a halogen-substituted silane to form an organic silicon complex. Optionally, the organic silicon complex is contacted with an aminosilane compound to form an organic silicon complex containing nitrogen. The organic silicon complex containing nitrogen or the organic silicon complex is contacted with a transition metal compound to form an organic silicon complex containing transition metal. The organic silicon complex containing transition metal is then contacted with a substituted aromatic ring nitrogen compound to form a fourth reaction complex, which is then contacted with a magnesium-based composite support that has been prepared in situ by reacting metallic magnesium with an alkyl or aromatic halide to form the catalyst component.

Abstract: Methods and apparatus to form a catalyst precursor, comprising combining in a reactor magnesium, an alkoxysilane compound, a halogenized silicon compound, a halogenized transition metal compound, a substituted aromatic furan compound having a structural formula, and an alkyl halide or aromatic halide compound to obtain a solid catalyst precursor, wherein the alkoxysilane compound and halogenized silicon compound are combined prior to either being exposed to the halogenized transition metal compound, and wherein the alkyl halide or aromatic halide compound is introduced to the reactor as the final step.

Abstract: Processes are disclosed relating to modifying clays with an olefinic functionalized surfactant containing a chain end polymerizable double bond, and to treating the thus modified organoclay with an olefin polymerization catalyst precursor, and polymerizing an olefin in the presence of the thus treated organoclay and an organoaluminum cocatalyst.