# US 12,009,121 B2 · Coated conductor

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- Number: US 12,009,121 B2
- Document ID: US12009121B2
- Status: Granted
- Kind: B2
- Application number: 17/255,026
- Filed: 2019-06-27
- Published: 2023-05-11
- Granted: 2024-06-11
- Earliest claimed: 2018-07-25
- Assignees: Dow Global Technologies LLC
- Applicants: Dow Global Technologies LLC
- Inventors: Anny L. Flory; Karl M. Seven; Mohamed Esseghir; Chester J. Kmiec; Rajen M. Patel
- Web page: https://patentgrep.com/patent/US12009121B2

## CPC

- H01B 3/441: {from alkenes}
- C08L 23/0815: {with aliphatic 1-olefins containing one carbon-to-carbon double bond}
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

The present disclosure provides a coated conductor. The coated conductor includes a conductor and an outermost coating on the conductor. The coating includes (A) an ethylene-based polymer having an I21/I2 ratio from 20 to 50; and (B) a propylene/ethylene copolymer having a Mw/Mn from 2.0 to 3.5. The coating has a surface roughness from 20 μ-inch to 100 μ-inch.

## Claims

### Claim 1

A coated conductor comprising:
a conductor;
an outermost coating on the conductor, the coating comprising:
(A) from 60 wt % to 90 wt % of an ethylene-based polymer consisting of (i) ethylene and (ii) a C4-C8 α-olefin comonomer and having an I21/I2 ratio from 20 to 50;
(B) from 10 wt % to 30 wt % of a propylene/ethylene copolymer consisting of (i) propylene and (ii) from 1 wt% to 15 wt% units derived from ethylene, based on the total weight of the propylene/ethylene copolymer and having a Mw/Mn from 2.0 to 3.5; and
(C) optionally, from greater than 0 wt % to 15 wt % of an additive, and
the coating having
a surface roughness from 20 μ-inch to 100 μ-inch, and
an I2 from 2.0 g/10 min to 3.5 g/10 min.

### Claim 2 (depends on 1)

The coated conductor of claim 1, wherein the (A) ethylene-based polymer is an ethylene/α-olefin copolymer.

### Claim 3 (depends on 1)

The coated conductor of claim 1, wherein the (A) ethylene-based polymer is selected from the group consisting of linear low density polyethylene (LLDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), and combinations thereof.

### Claim 4 (depends on 1)

The coated conductor of claim 1, wherein the (B) propylene/ethylene copolymer has a melting temperature, Tm, from 25° C. to 120° C.

### Claim 5 (depends on 1)

The coated conductor of claim 1, wherein the (B) propylene/ethylene copolymer has a density from 0.880 g/cc to 0.905 g/cc.

### Claim 6 (depends on 1)

The coated conductor of claim 1, wherein the (B) propylene/ethylene copolymer has a Normalized Relaxation Spectrum Index (nRSI) from 15 to 35.

### Claim 7 (depends on 1)

The coated conductor of claim 1 comprising the additive, wherein the additive is selected from the group consisting of carbon black, antioxidant, stabilizer, processing aid, and combinations thereof.

### Claim 8 (depends on 1)

The coated conductor of claim 1, wherein the coating comprises:
(A) from 60 wt % to 90 wt % of the ethylene-based polymer that is an MDPE;
(B) from 10 wt % to 30 wt % of the propylene/ethylene copolymer;
(C) optionally, from greater than 0 wt % to 15 wt % of an additive; and
the coating having a surface roughness from 30 μ-inch to 100 μ-inch, and an I2 from 2.0 g/10 min to 3.5 g/10 min.

### Claim 9 (depends on 1)

The coated conductor of claim 1, wherein the coating comprises:
(A) from 60 wt % to 90 wt % of the ethylene-based polymer that is a LLDPE;
(B) from 10 wt % to 30 wt % of the propylene/ethylene copolymer;
(C) optionally, from greater than 0 wt% to 15 wt% of an additive; and
the coating having a surface roughness from 30 μ-inch to 80 μ-inch, and an I2 from 2.0 g/10 min to 3.5 g/10 min.

### Claim 10 (depends on 1)

The coated conductor of claim 1, wherein the coating consists of:
(A) the ethylene-based polymer;
(B) the propylene/ethylene copolymer; and
(C) optionally, an additive selected from the group consisting of carbon black, antioxidants, colorants, ultra violet (UV) absorbers or stabilizers, anti-blocking agents, flame retardants, compatibilizers, plasticizers, fillers, processing aids, and combinations thereof.

### Claim 11 (depends on 1)

The coated conductor of claim 1, wherein the coating is in direct contact with the conductor.

### Claim 12 (depends on 1)

The coated conductor of any of claim 1, wherein an insulation layer is in direct contact with the conductor, and the coating is in direct contact with the insulation layer.

### Claim 13 (depends on 1)

The coated conductor of claim 1 comprising from 1 wt % to 10 wt % of the additive selected from the group consisting of carbon black, antioxidant, stabilizer, processing aid, and combinations thereof.

### Claim 14 (depends on 13)

The coated conductor of claim 13 comprising carbon black.

### Claim 15 (depends on 8)

The coated conductor of claim 8 comprising from 1 wt % to 10 wt % of the additive selected from the group consisting of carbon black, antioxidant, stabilizer, processing aid, and combinations thereof.

### Claim 16 (depends on 15)

The coated conductor of claim 15 comprising carbon black.

### Claim 17 (depends on 9)

The coated conductor of claim 9 comprising from 1 wt % to 10 wt % of the additive selected from the group consisting of carbon black, antioxidant, stabilizer, processing aid, and combinations thereof.

### Claim 18 (depends on 17)

The coated conductor of claim 17 comprising carbon black.

### Claim 19 (depends on 10)

The coated conductor of claim 10 with from 1 wt % to 10 wt % of the additive selected from the group consisting of carbon black, antioxidant, stabilizer, processing aid, and combinations thereof.

### Claim 20 (depends on 19)

The coated conductor of claim 19 with carbon black.