A transition metal compound represented by Chemical Formula 1 and a method for preparing the same, catalyst compositions including the same, and olefin-based polymers prepared from the same are disclosed herein. The transition metal catalyst has excellent structural stability together with excellent catalytic activity and can exhibit excellent copolymerizability even at a high temperature. In an embodiment, an olefin-based polymer prepared using a catalyst composition including the transition metal compound has a density of 0.91 g/cc or less.

The invention relates to a process for production of copolymers, in particular for the polymerization of propylene, and another monomer chosen from a group comprising ethylene and a C4-C12 α-olefin in a horizontal stirred reactor comprising an agitated bed and several reaction zones for forming polymer particles.

The invention relates to a process for production of copolymers, in particular for the polymerization of propylene, and another monomer chosen from a group comprising ethylene and a C4-C12 α-olefin in a horizontal stirred reactor comprising an agitated bed and several reaction zones for forming polymer particles.

The invention relates to a process for production of copolymers, in particular for the polymerization of propylene, and another monomer chosen from a group comprising ethylene and a C4-C12 α-olefin in a horizontal stirred reactor comprising an agitated bed and several reaction zones for forming polymer particles.

Disclosed are a universal alpha-olefin polymerization industrial catalyst, and an application thereof, specifically an industrial production catalyst which consists of (A) a solid catalyst component, (B) a cocatalyst organoaluminium compound and (C) an external electron donor compound, and is used for various alpha-olefin polymerization or copolymerization processes. The solid catalyst component (A) is prepared from a dibutyl phthalate or diisobutyl phthalate and 9,9-bis(methoxymethyl)fluorene composite internal electron donor. A hydrocarbyl alkoxy silicon, an organic acid ester or a hydrocarbyl alkoxy silicon and organic acid ester composite acts as the external electron donor component (C). The solid catalyst component (A), the cocatalyst organoaluminium compound (B) and the external electron donor compound (C) are used together in industrial devices for various alpha-olefin polymerization or copolymerization processes to produce new grades of poly-alpha-olefins.

Disclosed are a universal alpha-olefin polymerization industrial catalyst, and an application thereof, specifically an industrial production catalyst which consists of (A) a solid catalyst component, (B) a cocatalyst organoaluminium compound and (C) an external electron donor compound, and is used for various alpha-olefin polymerization or copolymerization processes. The solid catalyst component (A) is prepared from a dibutyl phthalate or diisobutyl phthalate and 9,9-bis(methoxymethyl)fluorene composite internal electron donor. A hydrocarbyl alkoxy silicon, an organic acid ester or a hydrocarbyl alkoxy silicon and organic acid ester composite acts as the external electron donor component (C). The solid catalyst component (A), the cocatalyst organoaluminium compound (B) and the external electron donor compound (C) are used together in industrial devices for various alpha-olefin polymerization or copolymerization processes to produce new grades of poly-alpha-olefins.

A solid precatalyst component for use in olefinic polymerization, includes titanium, magnesium, and an electron donor compound; wherein: the electron donor compound is at least one compound represented by Formula (I).

A solid precatalyst component for use in olefinic polymerization, includes titanium, magnesium, and an electron donor compound; wherein: the electron donor compound is at least one compound represented by Formula (I).

Ziegler-Natta (pro)catalyst systems made with an external electron donor compound, methods of synthesis of same, methods of olefin polymerization using same, and polyolefin polymers made thereby. The external electron donor compound is a (multi-alkoxy)silane.

A process comprising polymerizing propylene and an olefin comonomer selected from C.sub.2 or C.sub.4-C.sub.8 with a Ziegler Natta catalyst system and hydrogen in a single gas-phase reactor, to form a propylene polymer, at a temperature range of from 78 to 92° C. with a H.sub.2/C.sub.3 molar ratio of 0.005 to 0.25, the catalyst system comprising: a solid catalyst component comprising a transition metal compound, a Group 2 metal compound, an internal electron donor comprising a substituted phenylene aromatic di ester; an activity limiting agent; an organo-aluminum compound; and an external electron donor composition comprising at least one silane, wherein if the olefin comonomer is ethylene it is present in the propylene polymer in an amount from 1.0-7.0 wt % based on the total weight of the propylene polymer, and if the olefin comonomer is C.sub.4-C.sub.8, it is present in an amount from 1.0-15.0 mol % based on the total amount of the propylene polymer.