Patents by Inventor Ik Je CHOE
Ik Je CHOE has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10947327Abstract: The present invention relates to a catalyst composition including a transition metal compound represented by the following Formula 1; and one or more of a compound represented by the following Formula 2, a compound represented by the following Formula 3 and a compound represented by the following Formula 4. The catalyst composition according to the present invention has excellent copolymerization properties, and can be usefully used as a catalyst for a polymerization reaction for preparing an olefin-based polymer having a high molecular weight.Type: GrantFiled: December 23, 2016Date of Patent: March 16, 2021Inventors: Ik Je Choe, Seul Ki Kim, Ki Won Han, Eun Jung Lee, Choong Hoon Lee
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Patent number: 10723818Abstract: The present invention relates to a novel ligand compound represented by Formula 1 and a novel transition metal compound represented by Formula 2, and the novel ligand compound and transition metal compound according to the present invention has high comonomer incorporation effect in the preparation of an olefinic polymer having a low density and a high molecular weight, and thus can be usefully used as a catalyst for a polymerization reaction.Type: GrantFiled: November 27, 2019Date of Patent: July 28, 2020Assignee: LG Chem, Ltd.Inventors: Hyo Jung Han, Eun Jung Lee, Choong Hoon Lee, In Sung Park, Seul Ki Kim, Young Hoon Na, Ik Je Choe
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Publication number: 20200095347Abstract: The present invention relates to a novel ligand compound represented by Formula 1 and a novel transition metal compound represented by Formula 2, and the novel ligand compound and transition metal compound according to the present invention has high comonomer incorporation effect in the preparation of an olefinic polymer having a low density and a high molecular weight, and thus can be usefully used as a catalyst for a polymerization reaction.Type: ApplicationFiled: November 27, 2019Publication date: March 26, 2020Applicant: LG Chem, Ltd.Inventors: Hyo Jung Han, Eun Jung Lee, Choong Hoon Lee, In Sung Park, Seul Ki Kim, Young Hoon Na, Ik Je Choe
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Patent number: 10538603Abstract: The present invention relates to a novel ligand compound represented by Formula 1 and a novel transition metal compound represented by Formula 2, and the novel ligand compound and transition metal compound according to the present invention has high comonomer incorporation effect in the preparation of an olefinic polymer having a low density and a high molecular weight, and thus can be usefully used as a catalyst for a polymerization reaction.Type: GrantFiled: February 10, 2017Date of Patent: January 21, 2020Assignee: LG Chem, Ltd.Inventors: Hyo Jung Han, Eun Jung Lee, Choong Hoon Lee, In Sung Park, Seul Ki Kim, Young Hoon Na, Ik Je Choe
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Patent number: 10487158Abstract: The present invention provides a polypropylene-based composite material capable of exhibiting excellent strength properties and impact strength properties, particularly, markedly improved impact strength properties at a low temperature without using a separate additive by including (A) polypropylene, and (B) an olefin-based polymer which satisfies the conditions of the following (b1) to (b4): (b1) density (d): from 0.850 to 0.910 g/cc, (b2) melt index (MI, 190° C., 2.16 kg load conditions): from 0.1 g/10 min to 100 g/10 min, (b3) molecular weight distribution (MWD): from 1.5 to 3.0, and (b4) i) two peaks are shown in a temperature range of ?20° C. to 120° C. when taking measurements of temperature rising elution fractionation, and ii) a relation of T(90)?T(50)?60° C. is satisfied (where T(90) is a temperature at which 90 wt % of the olefin-based polymer is eluted, and T(50) is a temperature at which 50 wt % of the olefin-based polymer is eluted).Type: GrantFiled: December 8, 2016Date of Patent: November 26, 2019Assignee: LG Chem, Ltd.Inventors: Ji Yoon Woo, Hae Woong Park, Choong Hoon Lee, Hyo Ju Kim, Sang Eun Park, Young Woo Lee, Ik Je Choe
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Publication number: 20180223014Abstract: The present invention provides a polypropylene-based composite material capable of exhibiting excellent strength properties and impact strength properties, particularly, markedly improved impact strength properties at a low temperature without using a separate additive by including (A) polypropylene, and (B) an olefin-based polymer which satisfies the conditions of the following (b1) to (b4): (b1) density (d): from 0.850 to 0.910 g/cc, (b2) melt index (MI, 190° C., 2.16 kg load conditions): from 0.1 g/10 min to 100 g/10 min, (b3) molecular weight distribution (MWD): from 1.5 to 3.0, and (b4) i) two peaks are shown in a temperature range of ?20° C. to 120° C. when taking measurements of temperature rising elution fractionation, and ii) a relation of T(90)?T(50)?60° C. is satisfied (where T(90) is a temperature at which 90 wt % of the olefin-based polymer is eluted, and T(50) is a temperature at which 50 wt % of the olefin-based polymer is eluted).Type: ApplicationFiled: December 8, 2016Publication date: August 9, 2018Applicant: LG Chem, Ltd.Inventors: Ji Yoon Woo, Hae Woong Park, Choong Hoon Lee, Hyo Ju Kim, Sang Eun Park, Young Woo Lee, Ik Je Choe
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Publication number: 20180223010Abstract: The present invention relates to a novel ligand compound represented by Formula 1 and a novel transition metal compound represented by Formula 2, and the novel ligand compound and transition metal compound according to the present invention has high comonomer incorporation effect in the preparation of an olefinic polymer having a low density and a high molecular weight, and thus can be usefully used as a catalyst for a polymerization reaction.Type: ApplicationFiled: February 10, 2017Publication date: August 9, 2018Applicant: LG Chem, Ltd.Inventors: Hyo Jung Han, Eun Jung Lee, Choong Hoon Lee, In Sung Park, Seul Ki Kim, Young Hoon Na, Ik Je Choe
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Publication number: 20180201697Abstract: The present invention relates to a catalyst composition including a transition metal compound represented by the following Formula 1; and one or more of a compound represented by the following Formula 2, a compound represented by the following Formula 3 and a compound represented by the following Formula 4. The catalyst composition according to the present invention has excellent copolymerization properties, and can be usefully used as a catalyst for a polymerization reaction for preparing an olefin-based polymer having a high molecular weight.Type: ApplicationFiled: December 23, 2016Publication date: July 19, 2018Applicant: LG Chem, Ltd.Inventors: Ik Je Choe, Seul Ki Kim, Ki Won Han, Eun Jung Lee, Choong Hoon Lee
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Patent number: 10023669Abstract: The present invention relates to an olefin-based polymer exhibiting a single peak when analyzed by gel permeation chromatography (GPC), and having three elution temperatures Te1, Te2 and Te3 when measuring temperature rising elution fractionation (TREF) at a temperature ranging from ?20° C. to 120° C. Accordingly, the olefin-based polymer having excellent mechanical strength, and in particular, significantly improved impact strength is provided.Type: GrantFiled: March 23, 2016Date of Patent: July 17, 2018Assignee: LG CHEM, LTD.Inventors: Hyo Ju Kim, Ji Yoon Woo, Sang Eun Park, Young Woo Lee, Choong Hoon Lee, Hae Woong Park, Ik Je Choe
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Publication number: 20170218105Abstract: The present invention relates to an olefin-based polymer exhibiting a single peak when analyzed by gel permeation chromatography (GPC), and having three elution temperatures Te1, Te2 and Te3 when measuring temperature rising elution fractionation (TREF) at a temperature ranging from ?20° C. to 120° C. Accordingly, the olefin-based polymer having excellent mechanical strength, and in particular, significantly improved impact strength is provided.Type: ApplicationFiled: March 23, 2016Publication date: August 3, 2017Applicant: LG Chem, Ltd.Inventors: Hyo Ju KIM, Ji Yoon WOO, Sang Eun PARK, Young Woo LEE, Choong Hoon LEE, Hae Woong PARK, Ik Je CHOE