US 11,688,529 B2
Semi-conductive polymer composition
Muhammad Ali Malik, Stenungsund (SE); Christer Svanberg, Kallered (SE); Thomas Gkourmpis, Gothenburg (SE); Takashi Uematsu, Stenungsund (SE); Roger Carlsson, Save (SE); Niklas Thorn, Stenungsund (SE); and Jenny-Ann Ostlund, Torslanda (SE)
Assigned to BOREALIS AG, Vienna (AT)
Appl. No. 14/374,408
Filed by Muhammad Ali Malik, Stenungsund (SE); Christer Svanberg, Kallered (SE); Thomas Gkourmpis, Gothenburg (SE); Takashi Uematsu, Stenungsund (SE); Roger Carlsson, Save (SE); Niklas Thorn, Stenungsund (SE); and Jenny-Ann Ostlund, Torslanda (SE)
PCT Filed Jan. 31, 2013, PCT No. PCT/EP2013/000283
§ 371(c)(1), (2) Date Jul. 24, 2014,
PCT Pub. No. WO2013/120582, PCT Pub. Date Aug. 22, 2013.
Claims priority of application No. 12001032 (EP), filed on Feb. 16, 2012.
Prior Publication US 2015/0004411 A1, Jan. 1, 2015
Int. Cl. H01B 9/02 (2006.01); C08L 23/12 (2006.01); H01B 1/24 (2006.01); C08L 23/08 (2006.01); C08K 3/04 (2006.01); C08L 23/14 (2006.01); H01B 13/24 (2006.01); H01B 3/00 (2006.01)
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
OG exemplary drawing
 
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.