Tree resistant insulation compositions
AssigneeGeneral Cable Technologies Corporation
InventorMark R. Easter
Life of this patent
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Abstract
Insulation compositions for electric power cables having a polyolefin base polymer and an additive comprising either low molecular weight wax or polyethylene glycol (PEG) and optionally further comprising one or more hindered amine light stabilizers, amine antioxidants and other antioxidant blends are disclosed. Also disclosed are insulation compositions comprising a C2 to C8 alpha olefin in combination with a polyethylene homopolymer together with, optionally, one or more hindered amine light stabilizer and a liquid cresol antioxidant.
Claims16
An insulation composition for an electric cable comprising:
- (a) a base polymer comprising polyolefin;
- and
- (b) an additive comprising a blend of:
- (i) at least one amine antioxidant, and
- (ii) at least one hindered amine light stabilizer, and
- (iii) polyethylene glycol.
An insulation composition for electric cable comprising:
- (a) a base polymer comprising from about 50% to about 70%, based upon the weight of the entire composition, of a C2 to C8 alpha olefin blended with a low density polyethylene homo polymer base polymer,
- (b) a non ionic surfactant, and
- (c) a (i) sulfur containing phenolic antioxidant and (ii) an organic peroxide or hydrolysable silane group;
- wherein said base polymer, said non ionic surfactant, said sulfur containing phenolic antioxidant and said peroxide or silane group are added at a cable making extruder.
Dependencies are inferred from the claim text.