CPC H01B 9/027 (2013.01) [C08K 3/04 (2013.01); C08L 23/0853 (2013.01); C08L 23/0869 (2013.01); C08L 23/12 (2013.01); C08L 23/14 (2013.01); H01B 1/24 (2013.01); H01B 13/24 (2013.01); C08L 2205/02 (2013.01); H01B 3/004 (2013.01); Y10T 428/2933 (2015.01)] | 18 Claims |
1. A semi-conductive polymer composition consisting of:
(A) an ethylene-methyl acrylate (EMA) copolymer, present in an amount from 45 to 65 wt % of the total polymer composition;
(B) an atactic polypropylene homopolymer, present in an amount from 1 to 10 wt % of the total polymer composition;
(C) carbon black, present in an amount from 20 to 37 wt % of the total polymer composition;
(D) optionally a cross-linking agent; and
(E) optionally at least one further additive selected from the group consisting of antioxidants, scorch retarders, cross-linking boosters, stabilizers, processing aids, flame retardant additives, acid scavengers, inorganic fillers, voltage stabilizers, and additives for improving water tree resistance;
wherein the atactic polypropylene homopolymer (B) has a degree of crystallinity below 20%; and
wherein the atactic polypropylene homopolymer (B) has a Mw below 50,000.
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