Tree resistant compositions

C - Chemistry – Metallurgy – 08 – L

Patent

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117/185, 117/199

C08L 23/08 (2006.01) C08F 210/16 (2006.01) C08L 43/04 (2006.01) C08L 51/06 (2006.01) H01B 3/44 (2006.01)

Patent

CA 1335217

A water tree resistant composition comprising: (a) a copolymer of at least the two comonomers, ethylene and 1-butene, said copolymer having a density no greater than about 0.905 gram per cubic centimeter; or (b) a copolymer of at least the two comonomers, ethylene and 1-hexene, said copolymer having a density no greater than about 0.920 gram per cubic centimeter; or (c) the copolymer of (a) or (b) grafted with a hydrolyzable vinyl silane, the copolymers of (a) and (b) being produced by contacting the relevant comonomers, under polymerization conditions, with (i) a catalyst system containing a catalyst precursor comprising magnesium, titanium, a halogen, and an electron donor, and a hydrocarbyl aluminum cocatalyst or (ii) a catalyst system containing a catalyst precursor comprising vanadium, an electron donor, and a hydrocarbyl aluminum halide; a hydrocarbyl aluminum cocatalyst; and a halogen substituted lower alkane promoter.

599115

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