Lg Chem, Ltd

Sunghyun Park

Bog Ki Hong

Si Jung Lee

Yi Young Choi

Sun Mi Kim

Cheolhwan Jeong

Jinseok Lee

Jin Young Park

Chang Woan Han

Myunghan Lee

Hyo Min Kim

Yehoon Im

Soung Hun Yoo

Kyounghoon Min

Naeun Lee

The present disclosure relates to a polyethylene, which is reacted with chlorine to prepare a chlorinated polyethylene having improved tensile strength and excellent processability during extrusion by optimizing a low molecular region in a molecular structure, and a CPE compound including the same.

Polyethylene and chlorinated polyethylene thereof

A polyethylene according to the present disclosure maintains a stable crystal structure at a high temperature and ensures excellent uniformity in chlorine distribution, thereby preparing a chlorinated polyethylene having excellent chlorination productivity and thermal stability by reacting with chlorine, and may also prepare a PVC compound with improved impact strength by including the chlorinated polyethylene.

The polyethylene according to the present disclosure has a short relaxation time and a uniform particle size, thereby preparing a chlorinated polyethylene excellent in chlorination productivity and glass transition temperature by reacting with chlorine. And, a PVC composition with improved impact strength may also be prepared by including the same.

The polyethylene according to the present disclosure reacts with chlorine to prepare a chlorinated polyethylene having excellent processability during extrusion with a high tensile strength by implementing a molecular structure having a high content of medium molecular weight, and may also prepare a CPE compound including the chlorinated polyethylene.

The polyethylene according to the present invention has narrow particle size distribution, and can minimize a change in the crystal structure, and thus, it can be reacted with chlorine to prepare chlorinated polyethylene having excellent chlorination productivity and thermal stability.

The polyethylene according to the present disclosure has a molecular structure having a narrow particle distribution and a low content of ultra-high molecular weight, so that a chlorinated polyethylene having excellent chlorination productivity and thermal stability may be prepared by reacting the polyethylene with chlorine. And, a PVC composition including the same with improved impact strength may also be prepared.

The present disclosure relates to a method for preparing a polyolefin using a supported hybrid metallocene catalyst. According to the present disclosure, a polyolefin having a narrow molecular weight distribution can be prepared very effectively by introducing a cocatalyst in an optimum content in the presence of a supported hybrid metallocene catalyst containing two or more metallocene compounds having a specific chemical structure. The polyolefin prepared according to the present disclosure exhibits excellent uniformity in chlorine distribution in polyolefin during chlorination, thereby significantly improving elongation of the chlorinated polyolefin, compatibility with PVC and impact reinforcing performance. Thus, it exhibits excellent chemical resistance, weather resistance, flame retardancy, processability and impact strength reinforcing effect, and can be suitably applied as an impact reinforcing agent for PVC pipes and window profiles.

Method for preparing polyolefin using supported hybrid metallocene catalyst

The present invention relates to a viscosity measurement device. According to one aspect of the present invention, provided is a viscosity measurement device comprising: a housing which has an inlet port, an outlet port and a measurement space positioned between the inlet port and the outlet port; a magnetic body arranged in the measurement space; an electromagnet for moving the magnetic body; a position measurement part for measuring the position of the magnetic body; a flow rate measurement part for measuring the flow rate of fluid which flows in the measurement space; and a control part for measuring the viscosity of the fluid on the basis of the strength of a magnetic field generated by the electromagnet and the shear strain rate of the fluid which passes through the measurement space.

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Daejeon, South Korea

Sunghyun Park