# US 9,040,828 B2 · Coated conductor with voltage stabilized inner layer

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- Number: US 9,040,828 B2
- Document ID: US9040828B2
- Status: Granted
- Kind: B2
- Application number: 13/822,236
- Filed: 2011-09-23
- Published: 2013-07-11
- Granted: 2015-05-26
- Earliest claimed: 2010-09-30
- Assignees: Union Carbide Chemicals & Plastics Technology Corporation
- Applicants: Timothy J. Person; Jeffrey M. Cogen
- Inventors: Timothy J. Person; Jeffrey M. Cogen
- Web page: https://patentgrep.com/patent/US9040828B2

## CPC

- H01B 3/441: {from alkenes}
- C08K 5/3492: Triazines
- H01B 7/2813: {Protection against damage caused by electrical, chemical or water tree deterioration}
- 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})
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

Disclosed are polymeric compositions with improved breakdown strength. The polymeric compositions contain a polyolefin and a voltage stabilizing agent. The voltage stabilizing agent contains a triazine. The triazine may include a substituent that enables keto-enol tautomerism, which provides the voltage stabilizing agent with additional energy dissipation capacity. The present polymeric compositions exhibit improved breakdown strength when applied as an insulating layer for power cable.

## Claims

### Claim 1

A coated conductor comprising:
a conductor;
an outermost opaque layer;
an inner layer on the conductor and located between the conductor and the outermost layer, the inner layer comprising a polymeric composition comprising
a polyolefin; and
a triazine of the structure (I)
wherein R1-R7 are the same or different, and each of R1-R7 is selected from the group consisting of hydrogen, a C1-C30 hydrocarbyl group, a substituted C1-C30 hydrocarbyl group, a hydroxyl group, and combinations thereof.

### Claim 2 (depends on 1)

The coated conductor of claim 1 wherein the polyolefin is a polyethylene.

### Claim 3 (depends on 1)

The coated conductor of claim 1 wherein the polyolefin is a crosslinked polyethylene.

### Claim 4 (depends on 1)

The polymeric composition of claim 1 wherein at least one of R1-R2 is a C1-C30 hydrocarbyl group.

### Claim 5 (depends on 1)

The polymeric composition of claim 1 wherein at least one of R1-R2 is a substituted C1-C30 hydrocarbyl group.

### Claim 6 (depends on 1)

The coated conductor of claim 1 wherein at least one of R1-R2 comprises an aryl group.

### Claim 7 (depends on 1)

The coated conductor of claim 1 wherein each of R1-R2 comprises an aryl group.

### Claim 8 (depends on 1)

The polymeric composition of claim 1 comprising from about 0.1 wt % to about 3 wt % of the triazine.

### Claim 9 (depends on 1)

The coated conductor of claim 1 wherein the coated conductor is selected from the group consisting of a medium voltage power cable, a high voltage power cable, and an extra high voltage power cable.

### Claim 10 (depends on 1)

The coated conductor of claim 1 wherein the inner layer is an insulating layer.

### Claim 11 (depends on 1)

The coated conductor of claim 1 wherein the inner layer is a shielding layer.

### Claim 12 (depends on 1)

The coated conductor of claim 1 wherein the triazine has the structure (II)