Patent ID: 7037998
Filing Date: 2006-05-02
Classification: B01J,C08F,Y10S

Abstract:
1. An olefinic (co)polymer obtained by polymerizing at least one selected from the group consisting of ethylene and α-olefins having 3 to 20 carbon atoms in the presence of a metallocene type catalyst in the gas phase with allowing a saturated aliphatic hydrocarbon having 2 to 10 carbon atoms to exist in a concentration of 2 to 30 mol % in a fluidized-bed reactor, next bringing the resulting (co)polymer into contact with a ligand-remover and then heating said (co)polymer which had been brought into contact with the ligand-remover, wherein the n-decane-soluble content of the polymer is 1.9–10% by weight and the content of a ligand having a cyclopentadienyl structure is 5 ppb by weight or less.