公开(公告)号：US20210147589A1

公开(公告)日：2021-05-20

申请号：US17091217

申请日：2020-11-06

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Porter C. Shannon ,  Handel D. Bennett ,  Nathaniel B. Guy ,  Daniel G. O'Neil ,  James L. Schulze ,  Michael G. Tribo

IPC: C08F210/02 ,  C08J5/18 ,  C09K3/10

Abstract: Polyethylene copolymers with a structure that provides improved film properties are provided. The copolymers can have a density of about 0.905 to about 0.911 g/cm3. The copolymers can also have a DRI/I2 ratio of about 0.0008 to about 0.060, an I2 value of about 0.6 to about 3.8 dg/min, and an I21 value of about 8 to about 57 dg/min. The copolymers having those properties can be produced by introducing ethylene and at least one other olefin comonomer to a single reactor at a comonomer/ethylene mole ratio of about 0.02 to about 0.03 and polymerizing at a temperature of about 76.7° C. to about 80.6° C. and a pressure of about 1,724 kPa to about 2,413 kPa. The copolymers can be used to make films having a 21 mol % O2 transmission rate of about 150 to about 200 cc/100 in2/24 hr. and hot tack seal initiation temperatures of about 65° C. to 80° C.

公开(公告)号：US11767384B2

公开(公告)日：2023-09-26

申请号：US17091217

申请日：2020-11-06

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Porter C. Shannon ,  Handel D. Bennett ,  Nathaniel B. Guy ,  Daniel G. O'Neil ,  James L. Schulze ,  Michael G. Tribo

IPC: C08F210/02 ,  C08J5/18 ,  C09K3/10 ,  C08F210/14

CPC classification number: C08F210/02 ,  C08F210/14 ,  C08J5/18 ,  C09K3/10 ,  C08F2800/10 ,  C08J2323/08 ,  C09K2200/062

Abstract: Polyethylene copolymers with a structure that provides improved film properties are provided. The copolymers can have a density of about 0.905 to about 0.911 g/cm3. The copolymers can also have a DRI/I2 ratio of about 0.0008 to about 0.060, an I2 value of about 0.6 to about 3.8 dg/min, and an I21 value of about 8 to about 57 dg/min. The copolymers having those properties can be produced by introducing ethylene and at least one other olefin comonomer to a single reactor at a comonomer/ethylene mole ratio of about 0.02 to about 0.03 and polymerizing at a temperature of about 76.7° C. to about 80.6° C. and a pressure of about 1,724 kPa to about 2,413 kPa. The copolymers can be used to make films having a 21 mol % O2 transmission rate of about 150 to about 200 cc/100 in2/24 hr. and hot tack seal initiation temperatures of about 65° C. to 80° C.