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. 1. A polyethylene having an alpha transition temperature of 120° C. or more , anda high-crystalline region ratio on a temperature rising elution fractionation (TREF) graph of 12.5% or less, wherein the high-crystalline region ratio is obtained by dividing a graph area of a high-crystalline region having an elution temperature or more by a total graph area in percentage, wherein the elution temperature is a splitting point corresponding to a smallest peak between two highest peaks.2. The polyethylene according to claim 1 , wherein the polyethylene is an ethylene homopolymer.3. The polyethylene according to claim 1 , wherein the polyethylene has the alpha transition temperature of 120° C. to 145° C.4. The polyethylene according to claim 1 , wherein the polyethylene has the high-crystalline region ratio on a temperature rising elution fractionation (TREF) graph of 5% to 12.5%.5. The polyethylene according to claim 1 , wherein the polyethylene has a melt index (MI5) of 0.1 g/10 min to 1.5 g/10 min.6. The polyethylene according to claim 1 , wherein the polyethylene has a melt flow rate ratio (MFRR21.6/5 claim 1 , a value obtained by dividing the melt index measured at 190° C. under a load of 21.6 kg by the melt index measured at 190° C. under a load of 5 kg in accordance with ASTM D 1238) of 10 to 20.7. The polyethylene according to claim 1 , wherein the polyethylene has a density of 0.947 g/cm3 to 0.957 g/cm3.10. The method for preparing the polyethylene according to claim 8 , wherein each of the R3 and R6 is independently unsubstituted C1-6 alkyl or C2-6 alkyl ...

Polyethylene and Its Chlorinated Polyethylene

The present disclosure relates to a polyethylene, which is reacted with chlorine to prepare a chlorinated polyethylene having excellent chlorination productivity and thermal stability by enabling an increase in chlorination temperature, and facilitating deoxidation, dehydration and drying processes during chlorination processing, by implementing an enlarged area of the middle and high molecular weight regions in the molecular structure of the polyethylene. 1. A polyethylene , having:{'sub': '5', 'a MI(a melt index measured at 190° C. under a load of 5 kg) of 0.55 g/10 min or less,'}{'sub': '21.6', 'a MI(a melt index measured at 190° C. under a load of 21.6 kg) of 6 g/10 min or less,'}a complex viscosity (η*(ω0.05)) of 68000 Pa·s or more, measured at a frequency (ω) of 0.05 rad/s, anda complex viscosity (η*(ω500)) of 900 Pa·s to 1600 Pa·s, measured at a frequency (ω) of 500 rad/s.2. The polyethylene of claim 1 , wherein the polyethylene is an ethylene homopolymer.3. The polyethylene of claim 1 , wherein the MI(a melt index measured at 190° C. under a load of 5 kg) is 0.1 g/10 min to 0.55 g/10 min.4. The polyethylene of claim 1 , wherein the MI(a melt index measured at 190° C. under a load of 21.6 kg) is 2.2 g/10 min to 6 g/10 min.5. The polyethylene of claim 1 , which has a melt flow rate ratio (MFRR claim 1 , a value obtained by dividing the melt index measured at 190° C. under a load of 21.6 kg by the melt index measured at 190° C. under a load of 5 kg in accordance with ASTM D 1238) of 10 to 18.6. The polyethylene of claim 1 , wherein the complex viscosity (η*(ω0.05)) is 68000 Pa·s to 180000 Pa·s claim 1 , measured at a frequency (ω) of 0.05 rad/s.7. The polyethylene of claim 1 , which has a density of 0.947 g/cmor more.11. The method for preparing the polyethylene according to claim 8 , wherein Rand Rare each independently Calkylsilyl claim 8 , or Csilylalkyl.12. The method for preparing the polyethylene according to claim 8 , wherein the polymerization is ...

Polyethylene and Chlorinated Polyethylene Thereof

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. 1. A polyethylene having a crystal relaxation temperature of 110° C. or more , and a relaxation time satisfying the following Equation 1:{'br': None, 'i': T<−', 'M+, '0.6622×2\u2003\u2003[Equation 1]'}in Equation 1,T is the relaxation time of the polyethylene in seconds, and{'sub': '5', 'M is a melt index (MI, g/10 min) of the polyethylene measured at a temperature of 190° C. under a load of 5 kg in accordance with ASTM D 1238.'}2. The polyethylene according to claim 1 , wherein the polyethylene is an ethylene homopolymer.3. The polyethylene according to claim 1 , wherein the crystal relaxation temperature is 110° C. to 145° C.4. The polyethylene according to claim 1 , wherein the relaxation time is 2.0 seconds or less.5. The polyethylene according to claim 1 , wherein the melt index (MI) is 0.55 g/10 min or less.6. The polyethylene according to claim 1 , wherein the polyethylene has a melt flow rate ratio (MFRR21.6/5 claim 1 , a value obtained by dividing the melt index measured at 190° C. under a load of 21.6 kg by the melt index measured at 190° C. under a load of 5 kg in accordance with ASTM D 1238) of 10 to 18.7. The polyethylene according to claim 1 , wherein the polyethylene has a density of 0.947 g/cmto 0.954 g/cm.8. The polyethylene according to claim 1 , wherein the polyethylene has a molecular weight distribution (Mw/Mn) of 2 to 10.11. The method for preparing the polyethylene according to claim 9 , wherein each of the Rto Rand R to R is independently hydrogen claim 9 , or Chaloalkyl claim 9 , provided that at least one of Rto Rand Rto Ris ...

Polyethylene and Chlorinated Polyethylene Thereof

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.

Polyethylene and Chlorinated Polyethylene Thereof

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. 1. A polyethylene satisfying the following conditions 1) to 4):1) a relaxation time is 2 seconds or less,{'sub': '5', '2) a melt index MI(a melt index of the polyethylene measured at a temperature of 190° C. under a load of 5 kg in accordance with ASTM D 1238) is 0.75 g/10 min to 1.2 g/10 min,'}{'sub': '21.6/5', '3) a melt flow rate ratio (MFRR, a value obtained by dividing the melt index measured at 190° C. under a load of 21.6 kg by the melt index measured at 190° C. under a load of 5 kg in accordance with ASTM D 1238) is 9.5 to 12.5, and'}{'sup': 3', '3, '4) a density is 0.947 g/cmto 0.954 g/cm.'}2. The polyethylene according to claim 1 , wherein the relaxation time is 0.5 seconds to 2 seconds.3. The polyethylene according to claim 1 , wherein the polyethylene has a molecular weight distribution (Mw/Mn) of 4.4 or less.4. The polyethylene according to claim 1 , wherein the polyethylene has a weight average molecular weight of 140000 g/mol to 200000 g/mol.5. The polyethylene according to claim 1 , wherein an integral value in the region where log Mw is 4 or less in a GPC curve graph having an x-axis of log Mw and a y-axis of dw/dlogMw is 3% or less of the total integral value.6. The polyethylene according to claim 1 , wherein an integral value in the region where log Mw is 5.5 or more in a GPC curve graph having an x-axis of log Mw and a y-axis of dw/dlogMw is 12% or more of the total integral value.7. The polyethylene according to claim 1 , wherein the polyethylene has a particle size distribution (span) according to the following Equation 1 of 1.1 or less:{'br': None, 'i': D', '−D', 'D, 'sub': 90', '10', '50, 'Span ...

Supported hybrid catalyst and method for preparing polyolefin by using same

Hybrid Supported Catalyst and Method of Preparing Polyolefin Using the Same

Provided are a hybrid supported catalyst which includes two or more kinds of transition metal compounds having the following Chemical Formulas 1 and 2, thereby preparing a polyolefin, particularly, a high-density polyethylene having a molecular structure which is optimized to improve tensile strength of a chlorinated polyolefin compound, and a method of preparing a polyolefin using the same:wherein all the variables are described herein.

Supported hybrid catalyst and method for preparing polyolefin by using same

Provided are a hybrid supported catalyst which includes two or more kinds of transition metal compounds having specific chemical structures, thereby preparing a polyolefin, particularly, a high-density polyethylene having a molecular structure which is optimized to improve tensile strength of a chlorinated polyolefin compound, and a method of preparing a polyolefin using the same.

Polyethylene and chlorinated polyethylene thereof

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.

Polyethylene and its chlorinated polyethylene

The present disclosure relates to a polyethylene, which is reacted with chlorine to prepare a chlorinated polyethylene having excellent processability and size stability during high-speed extrusion by optimizing a high-crystalline region in a molecular structure, and a CPE compound including the same.

Polyethylene, and chlorinated polyethylene thereof

Polyethylene and chlorinated polyethylene thereof

Polyethylene and Its Chlorinated Polyethylene

There are provided a polyethylene capable of improving tensile strength while maintaining excellent processability and Mooney viscosity characteristics when preparing a chlorinated polyethylene compound by implementing a molecular structure having a low content of low molecular weight and a high content of high molecular weight, and a chlorinated polyethylene prepared using the same.

Polyethylene, and chlorinated polyethylene thereof

There are provided a polyethylene capable of improving tensile strength while maintaining excellent processability and Mooney viscosity characteristics when preparing a chlorinated polyethylene compound by implementing a molecular structure having a low content of low molecular weight and a high content of high molecular weight, and a chlorinated polyethylene prepared using the same.

Polyethylene and chlorinated polyethylene thereof

Polyethylene and chlorinated polyethylene thereof

Method for preparing supported metallocene catalyst, supported metallocene catalyst, and method for preparing polyolefin using the same

This invention relates to a method for preparing a supported metallocene catalyst, a supported metallocene catalyst and a method for preparing polyolefin using the same. According to this invention, a method for preparing a supported metallocene catalyst that not only has excellent olefin polymerization activity, but also enables preparation of polyolefin having a uniform powder morphology, a supported metallocene catalyst prepared by the method, and a method for preparing polyolefin using the supported metallocene catalyst are provided.

Method for preparing supported metallocene catalyst, supported metallocene catalyst, and method for preparing polyolefin by using same

Polyethylene and chlorinated polyethylene thereof

Polyethylene and chlorinated polyethylene thereof

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.

Method for preparing supported metallocene catalyst

Polyethylene and chlorinated polyethylene thereof

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.

Polyethylene and chlorinated polyethylene thereof

Hybrid supported catalyst and method of preparing polyolefin using the same

Provided are a hybrid supported catalyst which includes two or more kinds of transition metal compounds having the following Chemical Formulas 1 and 2, thereby preparing a polyolefin, particularly, a high-density polyethylene having a molecular structure which is optimized to improve tensile strength of a chlorinated polyolefin compound, and a method of preparing a polyolefin using the same:wherein all the variables are described herein.

Polyethylene and its chlorinated polyethylene

There are provided a polyethylene capable of improving tensile strength while maintaining excellent processability and Mooney viscosity characteristics when preparing a chlorinated polyethylene compound by implementing a molecular structure having a low content of low molecular weight and a high content of high molecular weight, and a chlorinated polyethylene prepared using the same.

Polyethylene and chlorinated polyethylene thereof

Polyethylene and Its Chlorinated Polyethylene

Provided are a polyethylene capable of improving tensile strength while maintaining excellent processability and Mooney viscosity characteristics when preparing a chlorinated polyethylene compound by implementing a molecular structure having a low content of low molecular weight and a high content of high molecular weight, and a chlorinated polyethylene prepared using the same.