KR900015183A - Crosslinked polyolefin composition for high voltage power cable insulation - Google Patents

Abstract

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Description

Crosslinked polyolefin composition for high voltage power cable insulation

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Claims (10)

In the polyolefin composition crosslinkable using an extruder, the base resin of the polyolefin is a primary antioxidant thiodiethylene bis- (3,5-di-tert, butyl-4-hydroxy) hydrocinnamate as a secondary antioxidant, distearyl thiodipropionate and dicumylperoxide as a crosslinking agent. Cross-linked polyolefin composition for high-voltage power cable insulation, characterized in that it contains an organic peroxide of t-butylcumylperoxide, t-butylhydroperoxide, di-isopropylbenzene hydroperoxide, di-t-butyl peroxide. The crosslinked polyolefin composition for high-voltage power cable insulation according to claim 1, wherein the base resin of the polyolefin is 94.9 to 98.8% by weight based on the total composition. The low-density polyethylene or linear low-density polyethylene polymerized from ethylene and an α-olefin having 4 or more carbon atoms as a base resin of the polyolefin composition, wherein a melt index of 0.915 to 0.940 g / cm 3 and 0.2 to 3.0 is used. Crosslinked polyolefin composition for high-voltage power cable insulation characterized in that it has. The crosslinked polyolefin composition for high voltage evening cable insulation according to claim 1, wherein the primary antioxidant contains 0.1 to 0.5% by weight relative to the polyolefin. The crosslinked polyolefin composition for high-voltage power cable insulation according to claim 4, wherein the primary antioxidant contains 0.15 to 0.3 wt% based on the polyolefin. The crosslinked polyolefin composition for high voltage power cable insulation according to claim 1, wherein the secondary antioxidant contains 0.1 to 0.6% by weight based on the polyolefin. The crosslinked polyolefin composition for high voltage power cable insulation according to claim 6, wherein the secondary antioxidant contains 0.2 to 0.5% by weight relative to the polyolefin. The crosslinked polyolefin composition for high-voltage power cable insulation according to claim 1, wherein the organic peroxide contains 1.0 to 4.0 wt% based on the polyolefin. The crosslinked polyolefin composition for high-voltage power cable insulation according to claim 8, wherein the organic peroxide contains 1.0 to 3.0% by weight relative to the polyolefin. In preparing a crosslinkable polyolefin composition using an extruder, a base resin of polyolefin, thiodiethylene bis- (3,5-di-tert-butyl-4-hydroxy) hydrocinnamate as a primary antioxidant, and distearyl as a secondary antioxidant Simultaneously inject thiodipropionate into the hopper at the inlet of the extruder, and extrude and granulate it. A method for producing a crosslinked polyolefin composition for high voltage power cable insulation, which is kneaded in a mixer. ※ Note: The disclosure is based on the initial application.