# US 11,898,026 B2 · Air-curable ethylene/alpha-olefin/diene interpolymer composition

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- Number: US 11,898,026 B2
- Document ID: US11898026B2
- Status: Granted
- Kind: B2
- Application number: 16/652,123
- Filed: 2017-11-08
- Published: 2020-08-20
- Granted: 2024-02-13
- Earliest claimed: 2017-11-08
- Assignees: Dow Global Technologies LLC
- Applicants: Dow Global Technologies LLC
- Inventors: Bo Lyu; Yabin Sun; Tao Han; Jozef Van Dun; Colin LiPiShan
- Web page: https://patentgrep.com/patent/US11898026B2

## CPC

- C08L 23/16: Ethylene-propylene or ethylene-propylene-diene copolymers
- C08K 5/14: Peroxides
- C08K 5/3435: Piperidines
- C08L 2312/02: with dienes
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

A composition comprises (A) an ethylene/alpha-olefin/diene interpolymer; (B) a peroxide comprising at least one peroxide bond; and (C) a bis-TEMPO compound having the Structure (I), wherein R1-4 are each independently H or a C1-C6 alkyl group; X is S, O, N, P, Se, a carbonyl group, a carboxyl group, an amide group, an azo group, an imino group, a carbamate group, a peroxy group, a phosphono group, a phosphate group, a sulfonyl group, a sulfinyl group, a sulfonate ester group, a sulfonate ester group, or combinations thereof; Y is a substitute or unsubstituted aliphatic alkyl group or aromatic alkyl group, a heterocyclic group, a siloxane group, an ethylene glycol group, an imide group, or combinations thereof; and n is greater than 1. The ratio of the molar amount of nitroxide groups of component (C) to the molar amount of the peroxide bonds of component (B) is from 0.100:1.000 to 2.000:1.000.

## Claims

### Claim 1

A composition comprising:
a reaction product of
(A) from 96 wt % to 98 wt % of a crosslinkable polymer consisting of an ethylene/propylene/5-ethylidene-2-norbornene interpolymer, the ethylene/propylene/5-ethylidene-2-norbornene interpolymer with from 60 wt % to 80 wt % of ethylene, based on the total weight of the ethylene/propylene/5-ethylidene-2-norbornene interpolymer, 10 wt % to 35 wt % of propylene, based on the total weight of the ethylene/propylene/5-ethylidene-2-norbornene interpolymer, and from greater than 3 wt % to 7 wt % of 5 ethylidene-2-norbornene, based on the total weight of the ethylene/propylene/5-ethylidene-2-norbornene interpolymer, wherein the ethylene, the propylene, and the 5-ethylidene-2-norbornene amount to 100 wt % of the crosslinkable polymer;
(B) from 1.25 wt % to 1.48 wt % of a peroxide comprising at least one —O—O— peroxide bond, based on the total weight of the composition;
(C) from 0.25 wt % to 2.0 wt % of piperidinoxy,4-hydroxy-2,2,6,6-tetramethyl sebacate compound having Structure I, based on the total weight of the composition:
wherein the ratio of the molar amount of nitroxide (NO·) groups of the component (C) to the molar amount of the peroxide bonds of the component (B) is from 0.180:1.000 to 0.900:1.000;
wherein the (A), the (B), and the (C) amount to 100 wt % of the composition, the reaction product is crosslinked and has a degradation degree from greater than 0.000 to 0.200, a difference between maximum torque MH and minimum torque (MH-ML) of from 15.50 dNm to 17.00 dNm, an FTIR-ATR degradation H1460 from 190 to 205, and a FTIR-ATR degradation H1714 value from less than or equal to 20 to greater than 0.

### Claim 2 (depends on 1)

The composition of claim 1, wherein the ethylene/propylene/5-ethylidene-2-norbornene interpolymer has a Mooney Viscosity from 15 to 40 (ML 1+4, 125° C.).

### Claim 3 (depends on 1)

A crosslinked reaction product formed by thermally treating the composition of claim 1 at a temperature from 50° C. to 150° C.

### Claim 4 (depends on 1)

An article comprising at least one component formed from the crosslinked reaction product of claim 1.

### Claim 5 (depends on 4)

The article of claim 4, wherein the article is selected from the group consisting of a profile, injection molded part, gasket, automotive part, building material, construction material, shoe component, and tube.

### Claim 6 (depends on 4)

The article of claim 4, wherein the article has a finger test rating of 3.

### Claim 7 (depends on 4)

The article of claim 4, wherein the article has a relative degradation of less than or equal to 10%).