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US 2003/0228975 A1Published application
Olefinic polymer and process for producing the same
AssigneeMitsui Chemicals, Inc.
InventorsSatoru Ohtani, Shinji Abe, Hiroto Nishida
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AssigneeMitsui Chemicals, Inc.
InventorsSatoru Ohtani, Shinji Abe, Hiroto Nishida
Estimating the term…
The olefinic polymer characterised in that the n-decane-soluble content thereof is 10% by weight or less and the content of a ligand having a cyclopentadienyl structure is 5 ppb by weight or less. The process for producing an olefinic polymer is a process of producing an olefinic polymer by (co)polymerizing olefins in a gas phase using a fluidized-bed reactor, the process comprising: a polymerization step of (co)polymerizing the olefins with allowing a saturated aliphatic hydrocarbon to exist in a concentration of 2 to 30 mol % in the fluidized-bed reactor and a ligand removing step involving a step of bringing the resulting (co)polymer into contact with a ligand-remover and a step of heating said (co)polymer which has been brought into contact with the ligand-remover.
An olefinic (co)polymer obtained by polymerizing at least one selected from ethylene and α-olefins having 3 to 20 carbon atoms in the presence of a metallocene type catalyst, wherein the n-decane-soluble content of the polymer is 10% by weight or less and the content of a ligand having a cyclopentadienyl structure is 5 ppb by weight or less.
A process for producing an olefinic polymer by (co)polymerizing one or two or more olefins selected from ethylene and α-olefins having 3 to 20 carbon atoms in the presence of a metallocene type catalyst in a gas phase using a fluidized-bed reactor, the process comprising:
Dependencies are inferred from the claim text.