Ethylene/1-hexene copolymers
AssigneeDow Global Technologies LLC
InventorsBo Liu, Nitin K. Borse, Lalit Darunte, David M. Pearson, Mridula Kapur, Linfeng Chen, Yongchao Zheng, Andrew T. Heitsch
Life of this patent
Estimating the term…
Abstract
Embodiments are directed towards ethylene/1-hexene copolymers made from ethylene and hexene, wherein the ethyl-CA ene/1-hexene copolymer has a density from 0.850 to 0.940 g/cm3, a melt index (I21) from 0.1 to 50 dg/min, a melt index (I21/I2) ratio less than or equal to 18.5, a Mw(Abs)/Mn(Abs) from 2.0 to 3.5, a Mz(Abs)/Mw(Abs) from 1.7 to 4.5, and a cumulative detector fraction (CDFLS) at a molecular weight of ≥1,000,000 g/mol of greater than 100*(0.0536−I21*0.00224)%.
Claims12
An ethylene/1-hexene copolymer, wherein the ethylene/1-hexene copolymer has a density from 0.850 to 0.940 g/cm3, a melt index (I21) from 0.1 to 50 dg/min, a melt index (I21/I2) ratio less than or equal to 18.5, a Mw(Abs)/Mn(Abs) from 2.0 to 3.5, a Mz(Abs)/Mw(Abs) from 1.7 to 4.5, and a cumulative detector fraction (CDFLS) at a molecular weight of ≥1,000,000 g/mol of greater than 100*(0.0536−I21*0.00224)%.
An ethylene/1-hexene copolymer, wherein the ethylene/1-hexene copolymer has a density from 0.850 to 0.940 g/cm3, a melt index (I21) from 0.1 to 10 dg/min, an Instrumented Dart Impact (IDI) Peak Force greater than 315 Newtons, and a cumulative detector fraction (CDFLS) at a molecular weight of ≥1,000,000 g/mol of greater than 4%.
A method for increasing Instrumented Dart Impact (IDI) Peak Force, the method comprising:
- contacting a zirconocene catalyst and a hydrogenation catalyst with ethylene and 1-hexene in a gas-phase reactor under polymerizable conditions, wherein the zirconocene catalyst and the hydrogenation catalyst have a titanium to zirconium molar ratio from 0.100 to 0.700;
- and
- making an ethylene/1-hexene copolymer having a density from 0.850 to 0.940 g/cm3 and an Instrumented Dart Impact (IDI) Peak Force greater than 315 Newtons and a cumulative detector fraction (CDFLS) at a molecular weight of ≥1,000,000 g/mol of greater than 4%.
Dependencies are inferred from the claim text.