Patent ID: 6864326
Filing Date: 2005-03-08
Classification: C01B,C08C,C08F

Abstract:
1. A process for hydrogenation of a conjugated diene polymer, the process comprising: (a) polymerizing or copolymerizing at least one conjugated diene in a hydrocarbon solvent using an organic alkali metal polymerization initiator to prepare a living polymer; (b) adding a terminating agent selected from amines, esters, ketones or halogen compounds to deactivate an active terminal of the living polymer; and (c) selectively hydrogenating the conjugated diene polymer using at least one organotitanium compound and a highly active lithium hydride having a z-average particle diameter less than 2,000 nanometers, which is prepared by reacting an alkyl lithium solution with gaseous hydrogen in a loop-type reactor equipped with an injection nozzle, a circulating pump and a heat exchanger, the organotitanium compound being represented by where R