A process or apparatus for producing polyethylene with improved film thinning and handleability involves polymerizing high-pressure ethylene using an autoclave-type reactor in the presence of a polymerization initiator. The reaction zone of the reactor has at least two different temperature sections; the polymerization initiator and the ethylene are supplied to the upstream temperature section in the reaction zone and the ethylene is polymerized to generate polyethylene; unreacted ethylene and the polyethylene generated at the upstream temperature section in the reactor flow into the downstream temperature section in communication with the upstream temperature section, so that additional polyethylene is generated at the downstream temperature section. A difference (ΔT [° C.]) between a temperature (T1 [° C.]) of the temperature section positioned upstream and a temperature (T2 [° C.]) of the temperature section positioned downstream in the reaction zone that receives the polymerization initiator and is in the autoclave-type reactor is 2.1° C. to 8.4° C.

A process or apparatus for producing polyethylene with improved film thinning and handleability involves polymerizing high-pressure ethylene using an autoclave-type reactor in the presence of a polymerization initiator. The reaction zone of the reactor has at least two different temperature sections; the polymerization initiator and the ethylene are supplied to the upstream temperature section in the reaction zone and the ethylene is polymerized to generate polyethylene; unreacted ethylene and the polyethylene generated at the upstream temperature section in the reactor flow into the downstream temperature section in communication with the upstream temperature section, so that additional polyethylene is generated at the downstream temperature section. A difference (ΔT [° C.]) between a temperature (T1 [° C.]) of the temperature section positioned upstream and a temperature (T2 [° C.]) of the temperature section positioned downstream in the reaction zone that receives the polymerization initiator and is in the autoclave-type reactor is 2.1° C. to 8.4° C.

Catalyst systems and methods for making and using the same. A method of methylating a catalyst composition while substantially normalizing the entiomeric distribution is provided. The method includes slurrying the organometallic compound in dimethoxyethane (DME), and adding a solution of RMgBr in DME, wherein R is a methyl group or a benzyl group, and wherein the RMgBr is greater than about 2.3 equivalents relative to the organometallic compound. After the addition of the RMgBr, the slurry is mixed for at least about four hours. An alkylated organometallic is isolated, wherein the methylated species has a meso/rac ratio that is between about 0.9 and about 1.2.

Catalyst systems and methods for making and using the same. A method of methylating a catalyst composition while substantially normalizing the entiomeric distribution is provided. The method includes slurrying the organometallic compound in dimethoxyethane (DME), and adding a solution of RMgBr in DME, wherein R is a methyl group or a benzyl group, and wherein the RMgBr is greater than about 2.3 equivalents relative to the organometallic compound. After the addition of the RMgBr, the slurry is mixed for at least about four hours. An alkylated organometallic is isolated, wherein the methylated species has a meso/rac ratio that is between about 0.9 and about 1.2.

Embodiments of a polyethylene composition are provided, which may include a first polyethylene fraction comprising at least one peak in a temperature range of from 35° C. to 70° C. in an elution profile via improved comonomer composition distribution (iCCD) analysis method, where a first polyethylene area fraction is an area in the elution profile from 35° C. to 70° C., and where the first polyethylene fraction area comprises from 25% to 65% of the total area of the elution profile; and a second polyethylene fraction comprising at least one peak in a temperature range of from 85° C. to 120° C. in the elution profile, where a second polyethylene area fraction is an area in the elution profile from 85° C. to 120° C., and where the second polyethylene fraction area comprises at least 20% of the total area of the elution profile.

Embodiments of a polyethylene composition are provided, which may include a first polyethylene fraction comprising at least one peak in a temperature range of from 35° C. to 70° C. in an elution profile via improved comonomer composition distribution (iCCD) analysis method, where a first polyethylene area fraction is an area in the elution profile from 35° C. to 70° C., and where the first polyethylene fraction area comprises from 25% to 65% of the total area of the elution profile; and a second polyethylene fraction comprising at least one peak in a temperature range of from 85° C. to 120° C. in the elution profile, where a second polyethylene area fraction is an area in the elution profile from 85° C. to 120° C., and where the second polyethylene fraction area comprises at least 20% of the total area of the elution profile.

The invention relates to a film comprising at least one first layer consisting of a heterophasic propylene copolymer composition comprising a heterophasic propylene copolymer, wherein the heterophasic propylene copolymer is present in an amount of at least 95 wt % based on the heterophasic propylene copolymer composition, wherein the heterophasic propylene copolymer consists of a) a propylene-based matrix wherein the propylene-based matrix consists of a propylene homopolymer and b) a dispersed ethylene α-olefin copolymer, wherein the sum of the weight of the propylene-based matrix and the weight of the dispersed ethylene-α-olefin copolymer is 100 wt % based on the heterophasic propylene copolymer, wherein the amount of xylene-soluble matter (CXS) in the heterophasic propylene copolymer composition is in the range from 20.0 to 35.0 wt % based on the heterophasic propylene copolymer composition, wherein the CXS is measured according to ISO 16152:2005 in p-xylene at 25° C.

The invention relates to a film comprising at least one first layer consisting of a heterophasic propylene copolymer composition comprising a heterophasic propylene copolymer, wherein the heterophasic propylene copolymer is present in an amount of at least 95 wt % based on the heterophasic propylene copolymer composition, wherein the heterophasic propylene copolymer consists of a) a propylene-based matrix wherein the propylene-based matrix consists of a propylene homopolymer and b) a dispersed ethylene α-olefin copolymer, wherein the sum of the weight of the propylene-based matrix and the weight of the dispersed ethylene-α-olefin copolymer is 100 wt % based on the heterophasic propylene copolymer, wherein the amount of xylene-soluble matter (CXS) in the heterophasic propylene copolymer composition is in the range from 20.0 to 35.0 wt % based on the heterophasic propylene copolymer composition, wherein the CXS is measured according to ISO 16152:2005 in p-xylene at 25° C.

A heterophasic propylene polymeric material comprising a propylene-based polymer A, a propylene-based polymer B, and a propylene copolymer C, wherein the polymer A contains 80 mass % or more of monomer units derived from propylene and has a limiting viscosity of 2.0 dL/g or less, the polymer B contains 80 mass % or more of monomer units derived from propylene and has a limiting viscosity of 2.1-4.9 dL/g, the copolymer C contains monomer units derived from propylene and 30-55 mass % of monomer units derived from ethylene or the like and has a limiting viscosity of 1.5-4.5 dL/g, and the polymer A, the polymer B, and the copolymer C are respectively contained in ratios of 50-75 mass %, 5-20 mass %, and 5-40 mass %.

A heterophasic propylene polymeric material comprising a propylene-based polymer A, a propylene-based polymer B, and a propylene copolymer C, wherein the polymer A contains 80 mass % or more of monomer units derived from propylene and has a limiting viscosity of 2.0 dL/g or less, the polymer B contains 80 mass % or more of monomer units derived from propylene and has a limiting viscosity of 2.1-4.9 dL/g, the copolymer C contains monomer units derived from propylene and 30-55 mass % of monomer units derived from ethylene or the like and has a limiting viscosity of 1.5-4.5 dL/g, and the polymer A, the polymer B, and the copolymer C are respectively contained in ratios of 50-75 mass %, 5-20 mass %, and 5-40 mass %.