C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
337/82, 400/9459
C08K 5/05 (2006.01) C08L 23/06 (2006.01) H01B 3/30 (2006.01) H01B 3/44 (2006.01)
Patent
CA 1114979
ABSTRACT OF THE DISCLOSURE Insulation particularly suitable for high voltage power cable consists essentially of low density polyethylene (or cross- linked polyethylene) and an effective amount of an alcohol of 6 to 24 carbon atoms which is a tree growth inhibitor capable of imparting at least a thousand-fold increase in electrical endurance as measured by an accelerated test procedure. Electri- cal trees can be initiated in the polyethylene in the presence of the alcohol. However, increased electrical endurance is obtained through inhibition of continued tree growth at that site. A precursor composition for a preferred insulation con- tains (1) low density polyethylene, (ii) a peroxide cross- linking agent, and (iii) an alcohol of 8 to 12 carbon atoms.
283549
E. I. Du Pont de Nemours And Company
Mccallum Brooks & Co.
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