US 12,112,864 B2
Electrical insulation composition and power cable
Satoshi Yamasaki, Osaka (JP); and Takanori Yamazaki, Osaka (JP)
Assigned to SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
Appl. No. 17/428,135
Filed by SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
PCT Filed Jan. 10, 2020, PCT No. PCT/JP2020/000707
§ 371(c)(1), (2) Date Aug. 3, 2021,
PCT Pub. No. WO2020/202689, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 2019-071786 (JP), filed on Apr. 4, 2019.
Prior Publication US 2022/0130571 A1, Apr. 28, 2022
Int. Cl. H01B 3/44 (2006.01); C08K 5/14 (2006.01); C08K 5/20 (2006.01); C08L 25/06 (2006.01); H01B 9/02 (2006.01)
CPC H01B 3/44 (2013.01) [C08K 5/14 (2013.01); C08K 5/20 (2013.01); C08L 25/06 (2013.01); H01B 9/027 (2013.01)] 22 Claims
OG exemplary drawing
 
1. An electrical insulation composition included in an insulation layer of a power cable, the electrical insulation composition comprising:
a base resin containing 65 parts by mass or more and 98 parts by mass or less of a polyethylene and 2 parts by mass or more and 35 parts by mass or less of styrene-based thermoplastic elastomer, the polyethylene and the styrene-based thermoplastic elastomer totaling 100 parts by mass; and
0.05 parts by mass or more and 1.0 parts by mass or less of a fatty acid amide,
wherein
no constitutional unit containing an oxygen atom is bonded to the polyethylene,
a density of the polyethylene is 0.91 g/cm3 or more and 0.945 g/cm3 or less,
the base resin is crosslinked with an organic peroxide, and
a gel fraction of the electrical insulation composition is more than 68%.