Flexible Power Cable Insulation

Patent metadata

Field	Value
Publication number	US-2016152807-A1
Application number	US-201414904326-A
Country	US
Kind code	A1
Filing date	Jul 11, 2014
Priority date	Jul 16, 2013
Publication date	Jun 2, 2016
Grant date	—

Abstract

Flexible cable comprises a crosslinked insulation sheath made from a composition comprising in weight percent based on the weight of the composition; (A) 60-95% of an ethylene polymer of crystallinity of less than 40%; (B) 4 to less than 40% of a propylene polymer with an upper melting point of greater than or equal to (>)130° C.; and (C) >0.5% peroxide; with the proviso that the ethylene polymer either comprises a continuous matrix within which the propylene polymer is dispersed or is co-continuous with the propylene polymer. Compatibilizers are optional to the composition.

First claim

1 . A composition comprising in weight percent based on the weight of the composition:
(A) 60-95% of an ethylene polymer of crystallinity of less than 40%; (B) 4 to less than 40% of a propylene polymer with an upper melting point of greater than or equal to (≧)130° C.; and (C) ≧0.5% peroxide;
with the proviso that the ethylene polymer comprises either a continuous phase within which the propylene polymer is dispersed or is co-continuous with the propylene polymer, wherein the composition has a gel content of greater than or equal to (≧)60% after crosslinking.

2 . The composition of claim 1 in which the ethylene polymer is an ethylene polymer made with a constrained geometry or metallocene catalyst.

3 . The composition of claim 2 in which the propylene polymer is an impact copolymer polypropylene.

4 . The composition of claim 2 in which the propylene polymer is an isotactic polypropylene homopolymer.

5 . The composition of claim 1 further comprising a compatibilizer.

6 . The composition of claim 1 free of a compatibilizer.

7 . A crosslinked insulation sheath for a cable, the crosslinked insulation sheath made from a composition comprising in weight percent based on the weight of the composition;
(A) 60-95% of an ethylene polymer of crystallinity of less than 40%; (B) 4 to less than 40% of a propylene polymer with an upper melting point of greater than or equal to (≧)130° C.; and (C) ≧0.5% peroxide;
with the proviso that the ethylene polymer either comprises a continuous matrix within which the propylene polymer is dispersed or is co-continuous with the propylene polymer, wherein the composition has a gel content of greater than or equal to (≧)60% after crosslinking.

8 . A cable comprising an insulation sheath of claim 7 .

9 . The composition of claim 1 in which the ethylene polymer is an ethylene/α-olefin interpolymer comprising ethylene and from 5 wt % to less than 50 wt % α-olefin, based on the weight of the interpolymer.

10 . The composition of claim 1 in which the composition comprises from 0.5 wt % to 10 wt % of the peroxide.

Assignees

• Dow Global Technologies Llc

Inventors

• Chaudhary Bharat I
• Brigandi Paul J
• Maurer Brian R
• Cogen Jeffrey M
• Marchand Gary R
• De Graaf Michael A
• Totte-Van T Westeinde Marlies C

Classifications

• C08K5/14

  Peroxides · CPC title

• C08L23/16

  Ethylene-propylene or ethylene-propylene-diene copolymers · CPC title

• C08L2207/02

  Heterophasic composition · CPC title

• C08L23/12

  Polypropene · CPC title

• H01B7/02

  Disposition of insulation · CPC title