Patent ID: 6080929
Filing Date: 2000-06-27
Classification: C08K,H01B

Abstract:
In a wire or cable system comprising a wire or cable portion, an insulation composition surrounding the wire or cable portion, a filler material surrounding the insulation composition and a jacket composition surrounding the filler material wherein either the insulation composition, the jacket composition, or both comprise at least one antioxidant, the improvement that comprises the inclusion in the filler material of from about 0.2 to about 1% by weight of a stabilizing mixture comprising at least two antioxidants, each of the two antioxidants being selected from different members of the three-membered group consisting of:(a) metal dithiocarbamate salts,(b) amine antioxidants selected from the group consisting of(1) hydrocarbon-substituted diarylamines of the general formulaAr--NH--Ar'where Ar and Ar' are independently selected aryl radicals,(2) reaction products of a diarylamine and an aliphatic ketone,(3) N,N' hydrocarbon substituted p-phenylenediamine, and(4) 1,2-dihydroquinoline compound, and(c) sterically hindered phenolic antioxidants, wherein the stabilizing mixture is present in the filler material in an amount that is effective for the reduction of the oxidation of the cable filling material and for producing an oxidative induction time, as measured by ASTM D 3895-94 at 190.degree. C., in excess of 100 minutes, whereby deterioration of the jacket and/or insulation is reduced.