Accession Number : ADP002540

Title :   New Data on Long Term Stabilization of Polyethylene for Telecommunication Wire Insulation,

Corporate Author : CIBA-GEIGY AG BASEL (SWITZERLAND)

Personal Author(s) : Meyer,F. K. ; Linhart,H.

Report Date : 17 NOV 1983

Pagination or Media Count : 10

Abstract : Medium density polyethylene is widely used for the insulation of telecommunication wires. A lifetime of 40-50 years is generally desired. Thus the stabilization of the polyethylene in contact with copper is of prime importance. In this paper new data pertaining to the long term heat stabilization are presented. The loss of stabilizers as a function of time is examined and aging data on actual wires are shown. There is evidence that polyethylene stabilized with a combination of a sterically hinderd phenolic antioxidant (pentaerythrityl tetrakis (3.5-di-t-butyl-4-hydroxyphenyl propionate)) and a copper deactivator (N, N'-bis (beta-3.5-di-t-butyl-4-hydroxyphenyl-propiono) hydrazide) has good chances of reaching the expected lifetime. (Author)

Descriptors :   *Electric wire, *Insulation, *Polyethylene, Stabilization, Telecommunications

Distribution Statement : APPROVED FOR PUBLIC RELEASE