Hanwha Chemical Corporation

Hyundai Mobis Co., Ltd.

Infac Elecs Co., Ltd.

Song Hee Yang

Dong Wook Jeong

Dong Ok Kim

Ui Gab Joung

In Jun Lee

Won Jun Kang

Sung Woo Lee

Ah Reum Kim

Lan Hua Piao

Jun Ho Seo

So Jung Lee

Seung Il Choi

Woo Jin Kim

Yu Jeong Lim

Won Jong Lee

Ah Ra Cho

Kyoung Sup Shin

The present invention relates to a high-density ethylene-based polymer comprising an ethylene homopolymer or a copolymer of ethylene and at least one comonomer selected from the group consisting of an &#x3b1;-olefin, a cyclic olefin, and a straight, branched and cyclic diene. According to the present invention, the high-density polyethylene resin has a wide molecular weight distribution and excellent comonomer distribution characteristics, has excellent melt flowability due to a long chain branched structure, and has excellent mechanical characteristics since the comonomer distribution is concentrated in a high-molecular-weight body. The high-density ethylene polymer of the present invention has excellent molding processability during processing such as extrusion, compression, injection and rotational molding by having excellent mechanical characteristics and melt flowability.

High-processability high-density ethylene-based polymer using hybrid supported metallocene catalyst, and preparation method therefor

A high-density ethylene-based polymer is provided. The high-density ethylene-based polymer contains an ethylene homopolymer or a copolymer of ethylene and at least one comonomer selected from the group consisting of an &#x3b1;-olefin, a cyclic olefin, and a straight, branched and cyclic diene. The high-density polyethylene resin has a wide molecular weight distribution and excellent comonomer distribution characteristics, has excellent melt flowability due to a long chain branched structure, and has excellent mechanical characteristics since the comonomer distribution is concentrated in a high-molecular-weight body. The high-density ethylene polymer has excellent molding processability during processing such as extrusion, compression, injection and rotational molding by having excellent mechanical characteristics and melt flowability.

High-density ethylene-based polymer using supported hybrid metallocene catalyst, and manufacturing method therefor

The present invention relates to a high-density ethylene-based polymer comprising: an ethylene homopolymer; or a copolymer of ethylene and at least one comonomer selected from the group consisting of &#x3b1;-olefins, cyclic olefins and linear, branched and cyclic dienes. According to the present invention, the high-density ethylene-based polymer has a wide molecular weight distribution and excellent comonomer distribution characteristics, has excellent melt flowability due to a long chain branched structure, and has excellent mechanical characteristics since the comonomer distribution is concentrated in a high-molecular-weight body. The high-density ethylene polymer of the present invention has excellent molding processability during processing such as extrusion, compression, injection and rotational molding by having excellent mechanical characteristics and melt flowability.

High-density ethylene-based polymer using hybrid supported metallocene catalyst, and preparation method

The invention relates to: a hybrid supported metallocene catalyst includes at least one first metallocene compound among the compounds represented by chemical formula 1, at least one second metallocene compound among the compounds represented by chemical formula 2 and a cocatalyst compound; a method for preparing an ethylene-&#x3b1;-olefin copolymer, comprising polymerizing olefin monomers in the presence thereof; and an ethylene-&#x3b1;-olefin copolymer having improved melt strength.

Hybrid supported metallogen catalyst, method for preparing olefin polymer by using same, and olefin polymer having improved melt strength

A antenna for vehicles may include: a main ground formed on a printed circuit board (PCB); a first LTE antenna ground connected to the main ground so as to ground a signal of a first LTE antenna; and a second LTE antenna ground connected to the main ground so as to ground a signal of a second LTE antenna. The first LTE antenna ground and the second LTE antenna ground may be left-right asymmetrically formed on the PCB.

Antenna for vehicles

Growing community of inventors

Incheon, South Korea

Song Hee Yang