Abstract: An insulating resin composition for a DC power cable improves DC electrical properties and extrusion stability, and includes (A) a low-density polyethylene having a complex viscosity ?*100, which is measured at 130° C. and a frequency of 100 rad/s, of 600 to 1,300 Pa·s, wherein a ratio (?*0.1/?*100) of a complex viscosity ?*0.1, which is measured at 130° C. and a frequency of 0.1 rad/s, to the complex viscosity ?*100 is 4 or more; (B) a modified polyethylene; and (C) a stabilizer including a mixture of a hindered phenol antioxidant and a thioether antioxidant. The amount of carbonyl groups introduced into the resin composition through the component (B) is 7×10?6 to 1.3×10?5 mol/g relative to the total mass of the component (A), the component (B), and the component (C).

Abstract: Provided is an insulating resin composition for a DC power cable, which insulating resin composition has excellent extrudability, is unlikely to experience sagging, has good scorch resistance, generates a smaller amount of secondary decomposition water, can form an insulating layer that stably exhibits good DC electrical properties, and has high extrusion stability. The insulating resin composition for a DC power cable according to the present invention includes (A) a low-density polyethylene having a complex viscosity ?*100, which is measured at 130° C. and a frequency of 100 rad/s, of 600 to 1,300 Pa·s, wherein a ratio (?*0.1/?*100) of a complex viscosity ?*0.1, which is measured at 130° C. and a frequency of 0.1 rad/s, to the complex viscosity ?*100 is 4 or more; (B) a modified polyethylene; and (C) a stabilizer including a mixture of a hindered phenol antioxidant and a thioether antioxidant. The amount of carbonyl groups introduced into the resin composition through the component (B) is 7×10?6 to 1.

Abstract: A composition comprising: (a) polyethylene; (b) as a first antioxidant, a thiobisphenol; (c) as a second antioxidant, a compound containing 3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate in the molecule; (d) as a third antioxidant, distearyl thiodipropionate; and (e) an organic peroxide, with the proviso that each antioxidant is present in an amount of about 0.01 to the about 0.2 part by weight and the organic peroxide is present in an amount of about 0.5 to about 3 parts by weight, all per 100 parts by weight of polyethylene.

Abstract: A coated wire comprising:(i) an electrical conductor coated with(ii) a mixture of (a) two linear copolymers of ethylene and one alpha-olefin having 3 to 8 carbon atoms, the first ethylene copolymer having a density of about 0.900 to 0.930 gram per cubic centimeter and a melt index of about 0.1 to about 5 grams per 10 minutes and the second ethylene copolymer having a density of 0.931 to about 0.950 gram per cubic centimeter and a melt index of about 0.1 to about 5 grams per 10 minutes, and for each 100 parts by weight of the first ethylene copolymer, there are about 15 to about 100 parts by weight of the second ethylene copolymer, and (b) for each 100 parts by weight of component (a), there are about 65 to about 150 parts by weight of a mixture comprising huntite and hydromagnesite in a weight ratio of about 2:1 to about 1:1.