Process for reducing peroxide migration in crosslinkable ethylene-based polymer compositions

Patent metadata

Field	Value
Publication number	US-9758638-B2
Application number	US-201314428708-A
Country	US
Kind code	B2
Filing date	Sep 5, 2013
Priority date	Sep 27, 2012
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

A composition comprising: A. 91.5 to 97.9% of a crosslinkable ethylene-based polymer, e.g., LDPE; B. 1 to 3% of an organic peroxide, e.g., dicumyl peroxide; C. 1 to 5% of a dielectric fluid, e.g., an alkylated naphthalene; and D. 0.1 to 0.5% of a coagent such as AMSD. The compositions exhibit high cure rates without any significant reduction in scorch resistance, heat ageing and electrical performance, and are particularly useful as insulation sheaths for medium and high voltage power cables.

First claim

I claim:

1. A medium or high voltage power cable comprising an insulation layer made from a pellet comprising, in weight percent based on the weight of the pellet:
A. 91.5 to 97.5% LDPE;
B. 1 to 3% of an organic peroxide;
C. 1 to 2% of an alkylated naphthalene; and
D. 0.1 to 0.5% of alpha methyl styrene dimer.

2. The cable of claim 1 in which the organic peroxide is dicumyl peroxide.

Assignees

• Dow Global Technologies Llc

Inventors

• Cree Stephen H

Classifications

• C08L23/04

  Homopolymers or copolymers of ethene · CPC title

• H01B3/441

  from alkenes · CPC title

• C08K5/14 Primary

  Peroxides · CPC title

• C08K5/01

  Hydrocarbons {(C08K5/0091 takes precedence)} · CPC title

• C08K2201/014

  Additives containing two or more different additives of the same subgroup in C08K · CPC title