Process for making ethylene interpolymers and interpolymers made thereby; compositions and electrical devices containing such interpolymers

An electrical device comprising:

• A. an electrical conductor, and
• B. a polymeric insulating layer comprising:
• (i) from 50 to 100 wt %, by weight of the interpolymer and the terpolymer, of an ethylene interpolymer comprising:
• (a) at least 55 mol % of ethylene derived units;
• and
• (b) a balance of units derived from:
• (1) propylene,
• (2) from 0 to less than 5 mol % of a α-olefin comonomer other than propylene, and
• (3) from 0 to less than 0.1 mol % of a diene,
• the ethylene interpolymer having:
• (a) a density of from 0.85 to 0.9 g/cm3,
• (b) an MI of from 0.01 to 2 g/10 min, and
• (c) an MIR (I21/I2) of from 40 to 80, and
• wherein the ethylene interpolymer:
• (a) is obtained by solution polymerization using transition metal complex as a catalyst and a boron-containing non-coordinating anion,
• (b) has an undetectable level of NCA derived residue as determined by boron content, as determined by ICP, and
• (c) a level of single site catalyst residue, as measured by the content of transition metal, of less than 2 ppm as determined by ICP;
• (ii) from 0 to 50 wt %, by weight of the interpolymer and the terpolymer, of an ethylene propylene terpolymer elastomer with:
• (a) a Mooney range of from 20 to 50,
• (b) a content of ethylene derived units of from 68-75 wt %,
• (c) a molecular weight distribution Mw/Mn of at least 5, and
• (d) from 0.1 to 2.5 wt % of units derived from VNB;
• and
• (iii) a clay, flame retardant and/or an inorganic filler.

A polymeric composition comprising:

• (i) from 50 to 100 wt %, by weight of the interpolymer and the terpolymer, of an ethylene interpolymer containing as α-olefin comonomer propylene, said ethylene interpolymer having:
• (a) a density of from 0.85 to 0.9 g/cm3,
• (b) an MI of from 0.01 to 2 g/10 min, and
• (c) an I21/I2 of from 40 to 80,
• said ethylene interpolymer obtained by solution polymerization using a transition metal complex as a catalyst and a boron-containing non-coordinating anion to provide an undetectable level of NCA derived residue, as determined by boron content, as determined by ICP;
• (ii) from 0 to 50 wt %, by weight of the interpolymer and the terpolymer, of an ethylene-propylene-vinyl norbornene terpolymer;
• and
• (iii) a clay, flame retardant and/or an inorganic filler.

An electrical device comprising:

• (A) an electrical conductor, and
• (B) a polymeric insulating layer comprising a polymer or a polymeric composition, comprising:
• (i) from 50 to 100 wt %, by weight of the interpolymer and terpolymer, of an ethylene interpolymer containing as α-olefin comonomer propylene, said ethylene interpolymer having:
• (a) a density of from 0.85 to 0.9 g/cm3,
• (b) an MI of from 0.01 to 2 g/10 min, and
• (c) an I21/I2 of from 40 to 80,
• said ethylene interpolymer obtained by solution polymerization using a transition metal complex as a catalyst and a boron-containing non-coordinating anion to provide an undetectable level of NCA derived residue, as determined by boron content, as determined by ICP;
• (ii) from 0 to 50 wt %, by weight of the interpolymer and terpolymer, of an ethylene-propylene-vinyl norbornene terpolymer having:
• (a) a content of ethylene derived units of from 68-75 wt. %,
• (b) a molecular weight distribution Mw/Mn of at least 5, and
• (c) a content from 0.1 to 2.5 wt % of units derived from VNB;
• and
• (iii) a clay, flame retardant and/or an inorganic filler.