Processes for producing high propylene content PEDM having low glass transition temperatures using tetrahydroindacenyl catalyst systems

Patent metadata

Field	Value
Publication number	US-11466102-B2
Application number	US-202017121240-A
Country	US
Kind code	B2
Filing date	Dec 14, 2020
Priority date	Mar 19, 2018
Publication date	Oct 11, 2022
Grant date	Oct 11, 2022

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 30 to 55 mol % ethylene, from 69.09 to 45 mol % C3 to C40 comonomer, and from 0.01 to 7 mol % diene wherein the Tg of the terpolymer is −28° C. or less. 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 30 to 55 mol % of ethylene, from 69.09 to 45 mol % C 3 -C 40 olefin, and from 0.01 to 7 mol % diene, wherein the terpolymer has:
1) a z-average molecular weight value of from 150,000 g/mol to 800,000 g/mol;
2) a crystallinity of from 0% to 3%;
3) a melt flow rate at 230° C. from 0.2 g/10 min to 100 g/10 min;
4) a glass transition temperature of −28° C. or lower;
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; and
7) a weight average molecular weight value of from 50,000 g/mol to 500,000 g/mol.

2. A C 3 -C 40 -olefin-ethylene-diene terpolymer comprising from 30 to 55 mol % ethylene, from 70 to 55 mol % C 3 to C 40 olefin, and from 0.01 to 7 mol % diene, wherein Tg of the terpolymer is −28° C. or lower, the terpolymer has a Tg (° C.) greater than or equal to −6.886−(87.98*E)+(294*D) and less than or equal to −1.886−(87.98*E)+(294*D) and E is the mole fraction of ethylene in the terpolymer and D is the mole fraction of diene in the terpolymer.

3. The terpolymer of claim 2 wherein the polymer Tg (° C.) is greater than or equal to −6.886−(87.98*E)+(294*D) and less than or equal to −1.886−(87.98*E)+(294*D) wherein E is the mole fraction of ethylene in the polymer and D is the mole fraction of diene in the polymer.

4. The terpolymer of claim 2 wherein the terpolymer 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 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.

Assignees

• Exxonmobil Chemical Patents Inc

Inventors

• Canich Jo Ann M
• Hagadorn John R
• Shah Rhutesh K
• Barsan Florin
• Mattler Sarah J
• Eckert Chase A
• Bai Zhifeng

Classifications

• C08F4/65908

  in combination with an ionising compound other than alumoxane, e.g. (C6F5)4B-X+ · CPC title

• C09J123/16 Primary

  Elastomeric} ethylene-propylene or ethylene-propylene-diene copolymers {, e.g. EPR and EPDM rubbers · CPC title

• B60C1/0016

  Compositions of the tread · CPC title

• C08J3/24

  Crosslinking, e.g. vulcanising, of macromolecules (mechanical aspects B29C35/00; crosslinking agents C08K) · CPC title

• C08F2810/20

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