POLYMERIZATION CATALYSTS FOR PRODUCING POLYMERS WITH LOW MELT ELASTICITY
申请人:CHEVRON PHILLIPS CHEMICAL COMPANY LP
公开号:US20130245302A1
公开(公告)日:2013-09-19
The present techniques relate to catalyst compositions, methods, and polymers encompassing a Group 4 metallocene compound comprising bridging η
5
-cyclopentadienyl-type ligands, typically in combination with a cocatalyst, and a activator. The compositions and methods presented herein include ethylene polymers with low melt elasticity.
Synthesis of bis (alkyl cyclopentadienyl) metallocenes
申请人:Boulder Scientific Company
公开号:US06175027B1
公开(公告)日:2001-01-16
A method for producing an alkyl cyclopentadiene by reacting cyclopentadienyl Grignard with an alkyl halide and for converting the alkyl cyclopentadiene to a bis(n-alkyl cyclopentadienyl) Group IV metal dihalide is described.
Process for the preparation of transition metal complexes having
申请人:Witco GmbH
公开号:US05336795A1
公开(公告)日:1994-08-09
Disclosed is a process for the preparation of transition metal complexes having monosubstituted cyclopentadienyl ligands of the general formula: ##STR1## in which monomeric cyclopentadiene is reacted with organic halides or pseudohalides, using a mixture of an alkali metal oxide or hydroxide and an alkaline earth metal oxide or hydroxide as metallating agent in glycol diether as solvent, to form the intermediate monosubstituted cyclopentadiene, which in situ is metallated and reacted with a transition metal halide to give the final product.