Polyethylene crosslinkable composition
AssigneeUnion Carbide Chemicals & Plastics Technology Corporation
InventorsMichael John Keogh, Jinder Jow
Life of this patent
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Abstract
A masterbatch composition comprising: (a) a copolymer of ethylene and 1-octene prepared with a metallocene catalyst; (b) as a scorch inhibitor, a substituted hydroquinone; 4,4′-thiobis(2-methyl-6-t-butylphenol); 4,4′-thiobis(2-t-butyl-5-methylphenol); or mixtures thereof; (c) as a cure booster, triallyl trimellitate; 3,9-divinyl-2,4,8,10-tetra-oxaspiro[5.5]undecane; triallylcyanurate; triallyl isocyanurate; or mixtures thereof; and (d) an organic peroxide.
Claims10
A masterbatch composition comprising:
- (a) a copolymer of ethylene and 1-octene prepared with a metallocene catalyst;
- (b) as a scorch inhibitor, a substituted hydroquinone;
- 4,4′-thiobis(2-methyl-6-t-butylphenol);
- 4, 4′-thiobis(2-t-butyl-5-methylphenol);
- or mixtures thereof;
- (c) as a cure booster, triallyl trimellitate;
- 3,9-divinyl-2,4,8,10-tetra-oxaspiro[5.5]undecane;
- triallylcyanurate;
- triallyl isocyanurate;
- or mixtures thereof;
- and
- (d) an organic peroxide.
A cable comprising one or more electrical conductors or a core of electrical conductors, each conductor or core being surrounded by a composition comprising:
- (a) a crosslinked very low density polyethylene having a density in the range of 0.860 to 0.915 gram per cubic centimeter;
- (b) a crosslinked copolymer of ethylene and 1-octene prepared with a metallocene catalyst;
- (c) as a scorch inhibitor, a substituted hydroquinone;
- 4,4′-thiobis(2-methyl-6-t-butylphenol);
- 4,4′-thiobis(2-t-butyl-5-methylphenol);
- or mixtures thereof;
- and
- (d) as a cure booster, triallyl trimellitate;
- 3,9-divinyl-2,4,8,10-tetra-oxaspiro[5.5]undecane;
- triallylcyanurate;
- triallyl isocyanurate;
- or mixtures thereof.
A process for extrusion comprising extruding around one or more electrical conductors or a core of electrical conductors, at a temperature below the decomposition temperature of the organic peroxide, a composition comprising
- (a) a very low density polyethylene having a density in the range of 0.860 to 0.915 gram per cubic centimeter;
- (b) a copolymer of ethylene and 1-octene prepared with a metallocene catalyst;
- (c) as a scorch inhibitor, a substituted hydroquinone;
- 4,4′-thiobis(2-methyl-6-t-butylphenol);
- 4,4′-thiobis(2-t-butyl-5-methylphenol);
- or mixtures thereof, and
- (d ) as a cure booster, triallyl trimellitate;
- 3,9-divinyl-2,4,8,10-tetra-oxaspiro[5.5]undecane;
- triallylcyanurate;
- triallyl isocyanurate;
- or mixtures thereof;
- and
- (e) an organic peroxide;
- and curing the extrudate.
Dependencies are inferred from the claim text.