Ziegler-natta catalyst for ethylene polymerization and method for preparing same
AssigneeHanwha Solutions Corporation
InventorsHyun Je WOO, Ui Gab JOUNG, Hwae KU, II, Yea Rang KWON
Life of this patent
Estimating the term…
Abstract
A Ziegler-Natta catalyst for ethylene polymerization includes not only a Ziegler-Natta pro-catalyst for ethylene polymerization containing an internal electron donor satisfying a specific formula, but also at least one external electron donor satisfying a specific formula to increase the number of active sites of a titanium compound, whereby polyethylene prepared using the Ziegler-Natta catalyst for ethylene polymerization has a high MFR ratio and thus good processability, thereby securing improvement in productivity of a polyethylene resin.
Claims13
A Ziegler-Natta pro-catalyst for ethylene polymerization, comprising:
- a titanium compound represented by Formula 1;
- a magnesium compound represented by Formula 2;
- and
- an internal electron donor represented by Formula 3.
- (In Formula 1,
- R1 is a substituted or unsubstituted C1 to C20 alkyl group;
- a substituent in “substituted or unsubstituted” is independently at least one selected from the group consisting of a halogen group, a cyano group, a nitro group, and a C1 to C8 alkyl group;
- X is a halogen atom;
- and
- n is an integer of 0 to 4.)
- (In Formula 2, X is a halogen atom.)
- (In Formula 3,
- R2 and R5 are independently a substituted or unsubstituted C1 to C20 alkyl group;
- R3 and R4 are independently a substituted or unsubstituted C1 to C20 alkyl group, or are linked together to form a substituted or unsubstituted alicyclic ring;
- a substituent in “substituted or unsubstituted” is independently at least one selected from the group consisting of a halogen group, a cyano group, a nitro group, and a C1 to C8 alkyl group;
- and
- a is an integer of 0 to 5.)
A Ziegler-Natta catalyst for ethylene polymerization, comprising:
- a Ziegler-Natta pro-catalyst for ethylene polymerization comprising an internal electron donor represented by Formula 3;
- an organoaluminum compound represented by Formula 4;
- and
- an external electron donor represented by Formula 5.
- (In Formula 3,
- R2 and R5 are independently a substituted or unsubstituted C1 to C20 alkyl group;
- R3 and R4 are independently a substituted or unsubstituted C1 to C20 alkyl group, or are linked together to form a substituted or unsubstituted alicyclic ring;
- a substituent in “substituted or unsubstituted” is independently at least one selected from the group consisting of a halogen group, a cyano group, a nitro group, and a C1 to C8 alkyl group;
- and
- a is an integer of 0 to 5.)
- (In Formula 4,
- R10 is a substituted or unsubstituted C1 to C20 alkyl group;
- a substituent in “substituted or unsubstituted” is independently at least one selected from the group consisting of a halogen group, a cyano group, a nitro group, and a C1 to C8 alkyl group;
- x is a halogen atom;
- and
- n is an integer of 0 to 3.)
- (In Formula 5,
- R11 and R12 are independently a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C5 to C20 cycloalkyl group, or a substituted or unsubstituted amine group;
- a substituent in “substituted or unsubstituted” is independently at least one selected from the group consisting of a halogen group, a cyano group, a nitro group, and a C1 to C8 alkyl group;
- and
- m is an integer of 0 to 4.
Dependencies are inferred from the claim text.