A process may include contacting ethylene monomer with Ziegler-Natta catalyst to form polyethylene. The Ziegler-Natta catalyst may be formed by contacting an alkyl magnesium compound with an alcohol and a metal reagent to form a blend, and contacting the blend with a first agent to form a solution of reaction product A. The solution of reaction product A may be contacted with a second agent to form a solid reaction product B, and the solid reaction product B may be contacted with a third agent to form a solid reaction product C. The solid reaction product C may be contacted with a fourth agent to form a solid reaction product D, and the solid reaction product D may be contacted with a fifth agent to form a catalyst component.

This invention relates homogeneous (solution) polymerization of propylene at higher temperatures (80 C. or more) using bisindenyl metallocene catalyst compounds having long (at least 4 carbon atoms) linear alkyl groups substituted at the 2-position and substituted or unsubstituted aryl groups at the 4-position.

This invention relates homogeneous (solution) polymerization of propylene at higher temperatures (80 C. or more) using bisindenyl metallocene catalyst compounds having long (at least 4 carbon atoms) linear alkyl groups substituted at the 2-position and substituted or unsubstituted aryl groups at the 4-position.

A resin dispersion having, dispersed in water with a 50% particle diamter of at most 0.5 m, a polymer (C) having a hydrophilic polymer (B) or an acidic group bonded to a propylene/-olefin copolymer (A) as a copolymer of propylene with an -olefin other than propylene, where the copolymer (A) has a propylene content of at least 50 mol% and less than 100 mol% and the copolymer (A) has a weight average molecular weight Mw of at least 10,000 and a molecular weight distribution Mw/Mn of at most 3.5, and the resin dispersion has a surfactant content of at most 15 parts by weight per 100 parts by weight of the polymer (C).

A resin dispersion having, dispersed in water with a 50% particle diamter of at most 0.5 m, a polymer (C) having a hydrophilic polymer (B) or an acidic group bonded to a propylene/-olefin copolymer (A) as a copolymer of propylene with an -olefin other than propylene, where the copolymer (A) has a propylene content of at least 50 mol% and less than 100 mol% and the copolymer (A) has a weight average molecular weight Mw of at least 10,000 and a molecular weight distribution Mw/Mn of at most 3.5, and the resin dispersion has a surfactant content of at most 15 parts by weight per 100 parts by weight of the polymer (C).

An ultra-high molecular weight ethylene-based copolymer powder comprising: an ethylene unit and an -olefin unit having 3 or more and 8 or less carbon atoms as structural units, wherein the ultra-high molecular weight ethylene-based copolymer powder has a viscosity-average molecular weight of 100,000 or more and 10,000,000 or less, a content of the -olefin unit is 0.01 mol % or more and 0.10 mol % or less based on a total amount of the ethylene unit and the -olefin unit, and in measurement with a differential scanning calorimeter under following conditions,an isothermal crystallization time is determined as a time from reaching 126 C. of Step A3 as a starting point (0 min) to giving an exothermic peak top due to crystallization and the isothermal crystallization time is 5 minutes or more. (Conditions for measurement of isothermal crystallization time) Step A1: holding at 50 C. for 1 minute and then an increase up to 180 C. at a temperature rise rate of 10 C./min, Step A2: holding at 180 C. for 30 minutes and then a decrease down to 126 C. at a temperature drop rate of 80 C./min, and Step A3: holding at 126 C.

An ultra-high molecular weight ethylene-based copolymer powder comprising: an ethylene unit and an -olefin unit having 3 or more and 8 or less carbon atoms as structural units, wherein the ultra-high molecular weight ethylene-based copolymer powder has a viscosity-average molecular weight of 100,000 or more and 10,000,000 or less, a content of the -olefin unit is 0.01 mol % or more and 0.10 mol % or less based on a total amount of the ethylene unit and the -olefin unit, and in measurement with a differential scanning calorimeter under following conditions,an isothermal crystallization time is determined as a time from reaching 126 C. of Step A3 as a starting point (0 min) to giving an exothermic peak top due to crystallization and the isothermal crystallization time is 5 minutes or more. (Conditions for measurement of isothermal crystallization time) Step A1: holding at 50 C. for 1 minute and then an increase up to 180 C. at a temperature rise rate of 10 C./min, Step A2: holding at 180 C. for 30 minutes and then a decrease down to 126 C. at a temperature drop rate of 80 C./min, and Step A3: holding at 126 C.

The present disclosure relates to a process for preparation of disentangled ultra-high molecular weight isotactic polypropylene. The disentangled ultra-high molecular weight isotactic polypropylene of the present disclosure has a low entanglement density, a low bulk density and a sphere like morphology. Further, the disentangled ultra-high molecular weight isotactic polypropylene of the present disclosure does not need costly and energy consuming post-production treatment for reducing the entanglement density.

The present disclosure relates to a process for preparation of disentangled ultra-high molecular weight isotactic polypropylene. The disentangled ultra-high molecular weight isotactic polypropylene of the present disclosure has a low entanglement density, a low bulk density and a sphere like morphology. Further, the disentangled ultra-high molecular weight isotactic polypropylene of the present disclosure does not need costly and energy consuming post-production treatment for reducing the entanglement density.

The present disclosure provides the use of quinolinyldiamido transition metal complexes, an activator and a metal hydrocarbenyl chain transfer agent, such as an aluminum vinyl-transfer agent, to produce long chain branched propylene polymers.