Processes for Producing High Propylene Content PEDM using Tetrahydroindacenyl Catalyst Systems

Patent metadata

Field	Value
Publication number	US-2021122842-A1
Application number	US-202017121220-A
Country	US
Kind code	A1
Filing date	Dec 14, 2020
Priority date	Mar 19, 2018
Publication date	Apr 29, 2021
Grant date	—

Abstract

The present disclosure provides methods for producing an olefin polymer by contacting a C3-C40 olefin, ethylene and a diene with a catalyst system including an activator and a metallocene catalyst compound comprising a substituted or unsubstituted indacenyl group and obtaining a C3-C40 olefin-ethylene-diene terpolymer typically comprising from 1 to 35 mol % of ethylene, from 98.9 to 65 mol % C3-C40 olefin, and, optionally, from 0.1 to 10 mol % diene. Preferably, a propylene-ethylene-ethylidene norbornene is obtained.

First claim

What is claimed is:

1 . A C 3 -C 40 olefin-ethylene-diene terpolymer comprising from 1 to 35 mol % of ethylene, from 98.9 to 65 mol % C 3 -C 40 olefin, and from 0.1 to 10 mol % diene, wherein the terpolymer has:
1) a propylene tacticity index ratio [m/r] of greater than 0.4 and less than 1.2; 2) a crystallinity of from 0% to 3%; 3) a melt flow rate at 230° C. from 0.5 g/10 min to 100 g/10 min; 4) a glass transition temperature of from −2° C. to −25° C.; 5) an Mw/Mn of from 1.5 to 3; 6) a number average molecular weight value of from 40,000 g/mol to 250,000 g/mol; 7) a weight average molecular weight value of from 50,000 g/mol to 500,000 g/mol; and 8) a z-average molecular weight value of from 150,000 g/mol to 800,000 g/mol.

2 . A C 3 -C 40 -olefin-ethylene-diene terpolymer comprising from 1 to 35 mol % ethylene, from 98.9 to 65 mol % C 3 to C 40 olefin, and from 0.1 to 10 mol % diene, and having a polymer crystallinity of from 0% to 3%; a melt flow rate (at 230° C.) of from 0.2 g/10 min to 100 g/10 min; a glass transition temperature of from −2° C. to −25° C.; and a propylene tacticity index ratio [m/r] of greater than 0.4 and less than 1.2.

3 . The terpolymer of claim 2 , wherein the propylene tacticity index is greater than 0.50 to less than 0.9.

4 . The terpolymer of claim 2 , wherein the polymer has a g′ value of 0.90 or greater.

5 . The terpolymer of claim 2 , wherein the C 3 -C 40 olefin is propylene or 1-butene.

6 . The terpolymer of claim 2 , wherein the C 3 -C 40 olefin is propylene.

7 . The terpolymer of claim 2 , wherein the diene is one or more of 5-ethylidene-2-norbornene; 1,4-hexadiene; 5-methylene-2-norbornene; 1,6-octadiene; 5-methyl-1,4-hexadiene; 3,7-dimethyl-1,6-octadiene; dicyclopentadiene; and combinations thereof.

8 . The terpolymer of claim 2 , wherein the diene is one or more of 5-ethylidene-2-norbornene.

9 . The terpolymer of claim 2 , wherein the polymer has a number average molecular weight value of from 40,000 g/mol to 250,000 g/mol.

10 . The terpolymer of claim 2 , wherein the polymer has a weight average molecular weight value of from 50,000 g/mol to 500,000 g/mol.

11 . The terpolymer of claim 2 , wherein the polymer has a z-average molecular weight value of from 150,000 g/mol to 800,000 g/mol.

Assignees

• Exxonmobil Chemical Patents Inc

Inventors

• Canich Jo Ann M
• Hagadorn John R
• Shah Rhutesh
• Barsan Florin
• Mattler Sarah J

Classifications

• B60C1/00

  Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition · CPC title

• C08F2810/20

  leading to a crosslinking, either explicitly or inherently · CPC title

• C08F2420/02

  Cp or analog bridged to a non-Cp X anionic donor · CPC title

• B60C1/0016

  Compositions of the tread · CPC title

• C08F2800/10

  as molar percentages · CPC title