Insulated power cable
First Claim
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1. In a rubber or plastic insulated power cable comprising a conductor and having formed thereon in the following order:
- at least an inner semiconductor layer and an insulation layer wherein at least one layer selected from the group consisting of said inner semiconductor layer and said insulation layer, is formed of a crosslinked structure of an olefin resin composition comprising an olefin resin and at least one crosslinking agent selected from the group consisting of m-(tert-butylperoxyisopropyl)-isopropylbenzene and p-(tert-butylperoxyisopropyl)-isopropylbenzene.
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Abstract
There is provided an olefin resin composition for power cables which contains an olefin resin and m-(tert-butylperoxyisopropyl)-isopropylbenzene and/or p-(tert-butylperoxyisopropyl)-isopropylbenzene. A crosslinking agent of this resin composition is suitably used for at least one of layers including semiconductor layers and an insulation layer in the power cables or around conductors at a joint between the power cables, whereby the high-temperature properties of the power cables can be improved.
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Citations
20 Claims
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1. In a rubber or plastic insulated power cable comprising a conductor and having formed thereon in the following order:
- at least an inner semiconductor layer and an insulation layer wherein at least one layer selected from the group consisting of said inner semiconductor layer and said insulation layer, is formed of a crosslinked structure of an olefin resin composition comprising an olefin resin and at least one crosslinking agent selected from the group consisting of m-(tert-butylperoxyisopropyl)-isopropylbenzene and p-(tert-butylperoxyisopropyl)-isopropylbenzene.
- View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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2. In a rubber or plastic insulated power cable comprising a conductor and having formed thereon in the following order:
- at least an inner semiconductor layer, an insulation layer, and an outer semiconductor layer formed thereon wherein at least one layer selected from the group consisting of said inner semiconductor layer, said insulation layer, and said outer semiconductor layer, is formed of a crosslinked structure of an olefin resin composition comprising an olefin resin and at least one crosslinking agent selected from the group consisting of m-(tert-butylperoxyisopropyl)-isopropylbenzene and p-(tert-butylperoxyisopropyl)-isopropylbenzene.
- View Dependent Claims (10, 11, 12, 13, 14)
- 15. In a joint system for power cables, which comprises a conductor joint between two rubber or plastic insulated power cables, said power cables having a conductor core, an inner semiconductor layer, an insulation layer and an outer semiconductor layer, said conductor joint having an inner semiconductor layer, an insulation layer, and an outer semiconductor layer, successively formed thereon or around the vicinities thereof, wherein at least one layer selected from the group consisting of said inner semiconductor layer, said insulation layer, and said outer semiconductor layer, is formed of a crosslinked structure of an olefin resin composition comprising an olefin resin and at least one crosslinking agent selected from the group consisting of m-(tert-butylperoxyisopropyl)-isopropylbenzene and p-(tert-butylperoxyisopropyl)-isopropylbenzene.
Specification