Patent ID: 7294680
Filing Date: 2007-11-13
Classification: C08C,C08F

Abstract:
1. A method of producing a conjugated diene polymer which comprises polymerizing a conjugated diene compound with a catalyst consisting essentially of the following components (a) to (d) in an organic hydrocarbon solvent; and then reacting with component (j) and, optionally, component (i): Component (a): a compound containing a rare earth element of atomic number 57-71 in the Periodic Table or a compound obtained by reacting the compound with a Lewis base; Component (b): a compound containing at least one halogen atom; Component (c): an aluminoxane; Component (d): an organoaluminum compound represented by the following general formula (1): wherein R Component (i): a carboxylic acid, an acid halide, an ester compound, a carboxylic ester compound or an acid anhydride represented by the following general formula (8), (9), (10), (11), (12) or (13): wherein R 7 to R 15 are the same or different and are a hydrocarbon group having a carbon number of 1-50, X is a halogen atom and m is an integer of 1-5; and Component (j): a component selected from the group consisting of dioctyltin dilaurate, dioctyltin bisoctylmaleate, dioctyltin bisbenzylmaleate, dioctyltin bisethylmaleate and bisoctyltin maleate, wherein the component (j) is used as a modifying agent.