| abstract |
Polyethylene having from 1 to 60 methyl branches and from 1 to 60 hexyl or higher branches per 1000 carbon atoms, a g-value of from 0.5 to 0.9, a limiting viscosity [n] of from 0.005 to 20.0 dl/g as measured at 140°C in o-dichlorobenzene, and not more than 0.2 of terminal double bond in 1000 carbon atoms, and process for producing the same, comprising polymerising ethylene in the presence of a catalyst composed of a co-ordination nickel compound of bivalent nickel, an organoaluminum compound, and an amino-bis(imino)-phosphorane represented by the general formula (I) below:n n where R¹, R², R³ and R⁴ may be the same or different mutually and are respectively n-alkyl, isoalkyl, aryl, or trialkylsilyl. |