Crosslinkable polymer compositions for flexible cross-linked cable insulators and methods for making flexible cross-linked cable insulators

摘要

(a) a polymer blend; And (b) from 0 to less than 40 weight percent of a filler, based on the total weight of the crosslinkable polymer composition, wherein the polymer blend comprises (1) the total weight of the crosslinkable polymer composition (I) a density of less than or equal to 0.93 g / cm 3, (ii) a density of less than 0.2 g / 10 min. , A melt index (I ₂ ) at 190 캜; And (iii) a shear discoloration ratio (V0.1 / V100) at 190 占 폚 and 10% strain of less than 8; And (2) from 5 to 90 weight percent of high-pressure polyethylene based on the total weight of the crosslinkable polymer composition; Wherein the ethylene based interpolymer of component (a) is not prepared in a high pressure reactor or process. In addition, the polymer blend has the following characteristics: (i) a shear thinning ratio (V0.1 / V100) of 190 at a temperature of 190 DEG C and 10% strain of at least 5, (ii) (iii) melt strength of at least 4 cent Newton at 190 DEG C, and (iv) flexural modulus of less than 25,000 psi, 2% secant. Such a crosslinkable polymer composition can be used as an insulating layer in a flexible power cable.