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US 11,017,918 B2Granted
Semi-conductive composition for power cable
AssigneeDYM Solution Co., Ltd.
InventorsJong Seok Yang, Ki Joung Lee, Geun Bae Jeon, Dong Ha Park
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Abstract
Provided is a semi-conductive composition for a power cable, more particularly, a semi-conductive composition for a power cable having excellent mechanical properties and electrical properties, and more specifically, a semi-conductive composition for a power cable capable of having improved scorch stability, improved surface smoothness, improved space charge accumulation suppression characteristic to thereby be applicable to an ultra-high voltage direct current power cable.
Claims9
A semi-conductive composition for an ultra-high voltage direct current power cable comprising:
- (A) an ethylene-butyl acrylate copolymer as a base resin,
- (B) a cross-linking inhibitor which is any one selected from 2,4-diphenyl-4-methyl -1-pentene and 1,4-hydroquinone, or a mixture thereof,
- (C) a carbon black which has an ash content according to ASTM D1506-99 of 0.02 wt% or less and a specific surface area according to ASTM D3037-89 of 60 to 150 m2/g and is any one selected from acetylene black and furnace black, or a mixture thereof,
- (D) a fatty acid ester which is any one selected from glycerin fatty acid ester and decaglycerin fatty acid ester, or a mixture thereof,
- (E) an antioxidant, and
- (F) a cross-linking agent;
- wherein a scorch time of the semi-conductive composition is forty minutes or more at 145° C. and t5 according to ASTM D1646;
- and
- wherein the semi-conductive composition has a surface smoothness such that a number of protrusions having a size of 50 to 100 μm is 5/cm2 or less.
6 more elements
Dependencies are inferred from the claim text.