Insulating resin composition for dc power cable, crosslinked resin body, dc power cable, member for forming reinforcing insulating layer of dc power joint, and dc power cable joint

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 η*100, which is measured at 130° C. and a frequency of 100 rad/s, of 600 to 1,300 Pa·s, wherein a ratio (η*0.1/η*100) of a complex viscosity η*0.1, which is measured at 130° C. and a frequency of 0.1 rad/s, to the complex viscosity η*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).

Dependencies are inferred from the claim text.