公开(公告)号：WO2023064917A1

公开(公告)日：2023-04-20

申请号：PCT/US2022/078139

申请日：2022-10-14

Applicant: UNIVATION TECHNOLOGIES, LLC

Inventor： LUGO, Elva L. ,  LIU, Bo ,  LI, Mengmeng ,  MURE, Cliff R. ,  CRAMMER, Taylor L. ,  ALEXANDRE, Francois

IPC: C08F210/16

Abstract: According to one embodiment, a process for producing a unimodal ethylene/α-olefin copolymer, the process comprising contacting ethylene and one or more (C3−C12) α-olefin comonomers with a chromium-based catalyst system in a gas-phase polymerization reactor to produce the unimodal ethylene/α-olefin copolymer; wherein the unimodal ethylene/α-olefin copolymer comprises: a density from 0.952 g/cm3 to 0.957 g/cm3; a flow index (I21) from 4.0 to 6.2 dg/min; a melt viscosity ratio (V0.1/V100) at 190 °C of 55 to 75; a molecular weight distribution (MWD) as calculated by the weight average molecular weight (Mw) divided by the number-average molecular weight (Mn) (Mw/Mn); and a peak molecular weight (Mp), all as measured by gel permeation chromatography.

公开(公告)号：WO2023069407A1

公开(公告)日：2023-04-27

申请号：PCT/US2022/046982

申请日：2022-10-18

Applicant: UNIVATION TECHNOLOGIES, LLC

Inventor： LUGO, Elva L. ,  HE, Chuan C. ,  KIM, Hyunwoo ,  KABABIK, David W. ,  SZUL, John F. ,  KAPUR, Mridula

IPC: C08F210/16 ,  C08F4/659

Abstract: A bimodal poly(ethylene-co-1-alkene) copolymer comprising a higher molecular weight poly(ethylene-co-1-alkene) copolymer component and a lower molecular weight poly(ethylene-co-1-alkene) copolymer component. The copolymer is characterized by a unique combination of features comprising, or reflected in, its component weight fraction amount, density, high load melt index, molecular weight distributions, viscoelastic properties, environmental stress-cracking resistance, and impact strength. Additional inventive embodiments include a method of making the copolymer, a formulation comprising the copolymer and at least one additive that is different than the copolymer, a method of making a manufactured article from the copolymer or formulation; the manufactured article made thereby, and use of the manufactured article.

公开(公告)号：WO2023064921A1

公开(公告)日：2023-04-20

申请号：PCT/US2022/078144

申请日：2022-10-14

Applicant: UNIVATION TECHNOLOGIES, LLC

Inventor： LUGO, Elva L. ,  LI, Mengmeng ,  MURE, Cliff R. ,  CRAMMER, Taylor L. ,  ALEXANDRE, Francois

IPC: C08F210/16

Abstract: According to one embodiment, a process for producing unimodal ethylene/α-olefin copolymer, the process comprising contacting ethylene and, optionally, one or more (C3−C12)α-olefin comonomers with a catalyst system in a gas-phase polymerization reactor, wherein the catalyst system comprises a chromium-based catalyst; wherein the unimodal ethylene copolymer comprises: a density from 0.942 g/cm3 to 0.950 g/cm3 according to ASTM D792-13; a flow index (I21) from 5.5 to 7.5 dg/min, when measured according to ASTM D1238 at 190 °C and a 21.6 kg load; a strain hardening modulus of 40 to 50 MPa; and a molecular weight distribution (MWD) as determined by a conventional gel permeation chromatography method or absolute gel permeation chromatography.