Formosa Plastics Corporation, U.s.a.

Other

The Penn State Research Foundation

Formosa Plastics Corporation

Formosa Plastic Corporation, U.s.a.

Honglan Lu

Chih-Jian Chen

Guangxue Xu

Zhongyang Liu

Gapgoung Kong

Ming-Yung Lee

Yiqun Fang

Tze-Chiang Chung

Zhiming Wang

Tieqi Li

Raj Ranjan

Youliang Hu

Yingying Lu

Yucai Ke

Cunyue Guo

Chaowei Feng

Bing Lu

Peng Li

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.

Ethylene/alpha-olefin copolymers for better optical and mechanical properties and processability of film made therefrom

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.

Cast film component layer exhibiting an outstanding cling property

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.

Long-chain branched ethylene copolymer with novel composition distribution and films formed from the same

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.

Process for preparing high melt strength polypropylene

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.

Ethylene copolymers with a novel composition distribution and processes for making the same

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 Q, Q, Q, and Qmay be identical or different and are each hetero-atoms selected from the group consisting of N, O, S, Si, B, and P. R, R, R, and Rmay be identical or different and are each hydrocarbon-based substituents to Q, Q, Q, and Q, respectively. The subscripts i, j, m, and n are independently 0 to 3 Rand Rmay be identical or different and are each a bridging group with a backbone chain length between the two hetero-atoms Qand Q, and Qand Q, respectively, 1-8 atoms. The bridging group is selected from the group consisting of aliphatic, alicyclic, and aromatic bivalent radicals.

Bicyclic organosilicon compounds as electron donors for polyolefin catalysts

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 XAl(OY), 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 TiXwherein 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(OR), silicon halide represented by formula SiXand alkoxy silane represented by formula Si(OR), wherein Rand Rare an aromatic or aliphatic alkyl group and wherein X is halide. Alkyl metal (C) is synthesized by reacting alkyl aluminum compounds represented by formula AlRwith a secondary amine having formula HNRand then by reacting with alkyl magnesium compounds represented by formula RMgR, wherein R, R, Re and Rare an aromatic or aliphatic alkyl group. The catalyst component is suitable for producing ethylene polymer and co-polymer with narrow molecular weight distribution as well as improved branching compositional distribution.

Catalyst system for producing ethylene (co) polymer with improved branch distribution

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 Qand Qmay 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 Qand Qcannot both be N or both be O. Rand Rmay be identical or different and are each hydrocarbon-based substituents to Qand Q, respectively. The subscripts m and n are independently 0 to 3. Ris an aliphatic, alicyclic or aromatic group. Ris a hydrocarbon group with 1 to 6 carbon atoms. Ris a bridging group with a backbone chain length between the two hetero-atoms Qand Qbeing 1-8 atoms. The bridging group is selected from the group consisting of aliphatic, alicyclic, and aromatic bivalent radicals.

Cyclic organosilicon compounds as electron donors for polyolefin catalysts

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.

Highly active alpha-olefin copolymerization catalyst system

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.

Alpha-olefins polymerization catalyst

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.

Process for making exfoliated polyolefin/clay nanocomposites

A highly active alpha-olefin polymerization catalyst component is disclosed. In the presence of a co-catalyst, the catalyst component is useful for the production of LLDPE resins. The catalyst component is produced by a method whereby organic silicon compounds are reacted with a transition metal complex and active transition metal species is deposited on a silicon-containing MgClthat is prepared in situ in the presence of the organic silicon compounds.

Highly active alpha-olefin polymerization catalyst

A magnesium halide support material for a polyolefin catalysts is disclosed. The magnesium halide of present invention is prepared by reacting magnesium with an alkylhalide in a non-polar hydrocarbon solvent. Preparation of the support does not require the use electron donating solvents and therefore does not require extensive washing to remove the solvent from the support.

Preparation of a magnesium halide support for olefin polymerization and a catalyst composition using the same

A solid catalyst component useful for the (co)-polymerization of olefins is disclosed. The catalyst component is prepared by reacting an activated magnesium halide composite support with a halogenized transition metal compound and a chelating diamide compound in the presence of organo-magnesium as a promoting agent and halogenized silicon or boron compounds as an activator. The catalyst component can be used with an organo-aluminum compound to provide a solid catalyst system that is compatible with slurry and gas phase polymerization processes. Linear low density polyethylene (LLDPE) produced using the catalyst component of the present invention displays a low molecular weight distribution, improved co-monomer incorporation, low content of the low molecular weight component, and excellent morphological properties such as spherical shape and high bulk density.

Growing community of inventors

Port Lavaca, TX, United States of America

Honglan Lu