Formosa Plastics Corporation, U.s.a.

Other

Formosa Plastics Corporation

Chih-Jian Chen

Guangxue Xu

Honglan Lu

Gapgoung Kong

Lei Zhang

Wei-Chun Shih

Yiqun Fang

Demin Xu

Michael D Jensen

Kevin Chung

Daoyong Wang

Charles R Johnson, Ii

Mary Lou Cowen

Zhongyang Liu

Zhiming Wang

Ming-Yung Lee

Youliang Hu

Yingying Lu

Yucai Ke

Cunyue Guo

Bing Lu

Raj Ranjan

Cyrus C Y Lee

Min-Chi Hsieh

Sun Chueh Kao

The present invention provides phthalate free impact resistant polypropylene copolymer and methods of preparation, which are produced directly from the polymerization reactor system without further compounding of components which significantly alters the physical properties of the resulting polymer. The copolymer according to the present invention possesses both low temperature ductility and high flexural modulus, wherein said polymer is produced in the presence of a phthalate free ZN catalyst comprising urea component.

High ductility, high modulus and phthalate free impact resistant propylene copolymer

Disclosed are support-activators and catalyst compositions comprising the support-activators for polymerizing olefins in which the support-activator includes clay heteroadduct, prepare from a colloidal phyllosilicate such as a colloidal smectite clay, which is chemically-modified with a heterocoagulation agent. By limiting the amount of heterocoagulation reagent relative to the colloidal smectite clay as described herein, the smectite heteroadduct support-activator is a porous and amorphous solid which can be readily isolated from the resulting slurry by a conventional filtration process, and which can activate metallocenes and related catalysts toward olefin polymerization. Related compositions and processes are disclosed.

Process for preparing catalysts and catalyst compositions

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

Disclosed are a catalyst component for olefin polymerization comprising titanium, magnesium, a halogen, internal donors, in combination with a silane and oxalic acid diamides of the following formula: An olefin polymerization catalyst system consisting of the solid catalyst component, an organoaluminum compound, and an optional external electron donor compound is also disclosed. Employment of both oxalic acid diamides and silane component in the presence of internal electron donors as an elements of solid Ziegler-Natta type catalyst composition enhances stereo-specificity while maintaining excellent catalyst activity and hydrogen response, in which the modified catalyst composition produces polypropylene with good productivity and higher stereo-specificity than catalyst composition without such modification.

Catalyst system for enhanced stereo-specificity of olefin polymerization and method for producing olefin polymer

The present invention relates to a process for the (co)polymerization of olefins to make polyethylene (co)polymers having sporadic long chain branches in high molecular weight fractions and a high molecular weight tail along with reversed comonomer composition distribution for improving processability, melt strength and optical properties. Such polyethylene (co)polymers have been prepared with a process comprising the reaction of at least the following components: (a) an advanced Ziegler-Natta catalyst precursor comprising titanium; (b) an activator comprising organohalogenous aluminum compounds; (c) ethylene; and (d) one or more alpha-olefins.

Process for making polyethylene copolymers with a reversed comonomer distribution

The present invention relates to a Ziegler-Natta catalyst component for olefin polymerization containing an amide element in combination with one or more internal electron donors. The catalyst components, according to the present invention, are able to produce polypropylene polymers with higher stereo-regularity. The present invention also provides a phthalate-free catalyst system capable of producing polypropylene with an isotacticity that is equal to or higher than catalyst systems containing phthalate derivatives.

Olefin polymerization catalyst components and process for the production of olefin polymers therewith

The present invention relates to a Ziegler-Natta catalyst component for olefin polymerization containing a urea element in combination with one or more internal electron donors. The catalyst components are able to produce polypropylene polymers with higher stereo-regularity. The present invention also provides phthalate-free catalyst system capable of producing polypropylene with an isotacticity that is equal to or higher than catalyst systems containing phthalate derivatives.

A phthalate-free catalyst component for olefin polymerization comprising titanium, magnesium, a halogen, diether, and oxalic acid diamides represented by the following formula (I): and an olefin polymerization catalyst system consisting of the solid catalyst component, an organoaluminum compound, and an optional external electron donor compound. The present catalyst compositions improve diether-based catalyst selectivity while maintaining excellent catalyst activity and hydrogen response. An olefin polymer that has a moderate molecular weight distribution while maintaining higher stereoregularity (isotacticity) over diether-based catalyst, and better than or equal to phthalate-based catalyst can be produced by utilizing the inventive catalyst component.

Catalyst system for olefin polymerization and method for producing olefin polymer

The present invention relates to the use of oxalic acid diamides as modifiers in conjunction with solid Ziegler-Natta type catalyst in processes in which polyolefins such as polypropylene are produced. The modified catalyst compositions produce polypropylene with good productivity and higher sterospecificity than systems without such modification.

Oxalic acid diamides as modifiers 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

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.

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Port Lavaca, TX, United States of America

Chih-Jian Chen