# US 2020/0399456 A1 · Ethylene/alpha-olefin interpolymer compositions with improved long term heat aging performance

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- Number: US 2020/0399456 A1
- Document ID: US20200399456A1
- Status: Published application
- Kind: A1
- Application number: 16/969,972
- Filed: 2018-02-14
- Published: 2020-12-24
- Earliest claimed: 2018-02-14
- Assignees: Dow Global Technologies LLC
- Applicants: Dow Global Technologies LLC
- Inventors: Xiaosong Wu; Guang Ming Li; Bo Lyu; Tao Han; Colin LiPiShan
- Web page: https://patentgrep.com/patent/US20200399456A1

## CPC

- C08L 23/16: Ethylene-propylene or ethylene-propylene-diene copolymers
- C08F 210/18: with non-conjugated dienes, e.g. EPT rubbers
- C08L 2205/025: containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
- C08L 2312/00: Crosslinking
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS

## Abstract

A first composition comprising a first ethylene/α-olefin/diene interpolymer and a second ethylene/α-olefin interpolymer, and wherein the first composition comprises from 0.1 to 1.0 wt % diene, based on the weight of the first composition, and wherein the first composition comprises from 40 to 70 wt % ethylene, based on the weight of the first composition.

## Claims

### Claim 1

A first composition comprising a first ethylene/α-olefin/diene interpolymer and a second ethylene/α-olefin interpolymer, and
wherein the first composition comprises from 0.1 to 1.0 wt % diene, based on the weight of the first composition, and
wherein the first composition comprises from 40 to 70 wt % ethylene, based on the weight of the first composition.

### Claim 2 (depends on 1)

The first composition of claim 1, wherein the first ethylene/α-olefin/diene interpolymer has an Mw from 250,000 to 500,000 g/mole, and a diene content from 0.01 to 0.80 wt %, based on the weight of the first ethylene/α-olefin/diene interpolymer.

### Claim 3 (depends on 1)

The first composition of a claim 1, wherein the first ethylene/α-olefin/diene interpolymer and the second ethylene/α-olefin interpolymer are each, independently, an EPDM.

### Claim 4 (depends on 1)

The first composition of claim 1, wherein the first composition has an Mw from 150,000 to 400,000 g/mole, and a diene content from 0.01 to 0.50 wt %, based on the weight of the first composition.

### Claim 5 (depends on 1)

The first composition of claim 1, wherein first composition has a molecular weight distribution (Mw/Mn) from 2.10 to 3.20.

### Claim 6 (depends on 1)

The first composition of a claim 1, wherein the first composition has a % crystallinity ≤15%.

### Claim 7 (depends on 1)

The first composition of claim 1, wherein the first interpolymer and the second interpolymer comprise ≥95 wt % of the total weight of the first composition.

### Claim 8 (depends on 1)

The first composition of claim 1, wherein the first composition has a “% Peak Area (21.3 to 22.0 ppm)” ≥5.0%, as determined by 13C NMR.

### Claim 9 (depends on 1)

A crosslinked composition comprising the composition of claim 1.

### Claim 10 (depends on 1)

An article comprising at least one component formed from the composition of claim 1.