Crosslinked polyethylene resin composition

Patent metadata

Field	Value
Publication number	US-9920186-B2
Application number	US-201514786386-A
Country	US
Kind code	B2
Filing date	Mar 25, 2015
Priority date	Nov 19, 2014
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

Disclosed is a crosslinked polyethylene resin composition. According to the present disclosure, a crosslinked polyethylene resin composition having general allowance temperature due to excellent heat resistance characteristics, enhanced long-term workability due to superior long-term aging resistance, and water tree inhibition effects similar or better than those of conventional crosslinked polyethylene (XLPE)), and a power cable manufactured from the composition may be provided.

First claim

What is claimed is:

1. A crosslinked polyethylene resin composition consisting of:
a) 100 parts by weight of low-density polyethylene (LDPE),
b) 1 to 2.5 parts by weight of a crosslinking agent,
c) 0.4 parts by weight of a crosslinking facilitator,
d) 0 to 2 parts by weight of a treeing inhibitor, and
e) 0.4 to 0.6 parts by weight of an antioxidant, wherein the antioxidant is a mixture comprising 0.3 parts by weight of 4,4′-thiobis(2-tert-butyl-5-methyl-phenol) and 0.1 to 0.3 parts by weight of thiobis[2-tert-butyl-5-methyl-4,1-phenylene]bis[3-(dodecylthio)propionate];
wherein the crosslinked polyethylene resin composition has a water tree inhibition rate of 11.6 to 13.9,
wherein the crosslinked polyethylene resin composition has a hot elongation percentage (230° C., 15 mins 20 n/cm 2 ) of 101 to 110%,
wherein the crosslinked polyethylene resin composition has tensile strength after aging of 260 to 276 kg/cm 2 (IEC 811 dumbbell specimen, convection oven at 135° C., 30 days), and
wherein the crosslinked polyethylene resin composition has a scorch resistance (min:sec) of 10:30 to 11:35.

2. The crosslinked polyethylene resin composition according to claim 1 , wherein c) the crosslinking facilitator is one or more selected from the group consisting of 2,4-diphenyl-4-methyl-1-pentene, 1,4-hydroquinone and hydroquinone derivatives.

3. The crosslinked polyethylene resin composition according to claim 1 , wherein c) a weight ratio of the crosslinking facilitator to e) the antioxidant is 1:1 to 1:1.5.

4. The crosslinked polyethylene resin composition according to claim 1 , wherein the crosslinked polyethylene resin composition has a crosslinking degree of 80 to 90%.

5. The crosslinked polyethylene resin composition according to claim 1 , wherein the crosslinked polyethylene resin composition is a crosslinked polyethylene resin composition for power cable electric insulation.

6. The crosslinked polyethylene resin composition according to claim 1 , wherein the crosslinked polyethylene resin composition is a crosslinked polyethylene resin composition for power cable electric insulation.

Assignees

• Lg Chemical Ltd

Inventors

• Sun Ka Ram
• Park In Gyu
• Nam Youn Sun
• Song Young Il

Classifications

• C08K5/14 Primary

  Peroxides · CPC title

• C08K5/375 Primary

  containing six-membered aromatic rings {(C08K5/3725 takes precedence)} · CPC title

• C08K5/36

  Sulfur-, selenium-, or tellurium-containing compounds {(C08K5/0091 takes precedence)} · CPC title

• C08K5/03

  aromatic {, e.g. C6H5-CH2-Cl} · CPC title

• C08L2207/066

  LDPE (radical process) · CPC title