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US 4,305,849 AGranted
Polyolefin composition containing high molecular weight polyethylene glycol useful for electrical insulation
AssigneeNippon Unicar Company Limited
InventorsYouichi Kawasaki, Kenji Igarashi, Seiho Taniguchi
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Abstract
A polyolefin composition for electrical insulation which comprises polyolefin or crosslinked polyolefin and a small quantity of high-molecular weight polyethylene glycol. This composition is far less vulnerable to the deterioration that occurs as dendroid voids when employed as an electrical insulation of high-tension power cables which are operated under water. The polyethylene glycol has more than 44 carbon atoms and is used in an amount from 0.3 to 10 wt % based on polyolefin.
Claims5
An electrical insulation composition, comprising:
- an organic polymeric electrical insulating material selected from the group consisting of polyolefin and crosslinked polyolefin, said insulating material containing blended therein from 0.3 to 10% by weight, based on the weight of said insulating material, of high molecular weight polyethylene glycol having more than 44 carbon atoms in the molecule.
Dependencies are inferred from the claim text.