US RE39,156 E1Granted

Process for the preparation of polyolefins

AssigneeBasell Polyolefine GmbH

InventorsAndreas Winter, Martin Antberg, Bernd Bachmann, Volker Dolle, Frank Küber, Jürgen Rohrmann, Walter Spaleck

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Abstract

A process for the preparation of an olefin polymer by polymerization or copolymerization of an olefin of the formula Ra—CH═CH—Rb, in which Ra and Rb are identical or different and are a hydrogen atom or a hydrocarbon radical having 1 to 14 carbon atoms or Ra and Rb, together with the atoms connecting them, can form a ring, at a temperature of from −60° to 200° C., at a pressure of from 0.5 to 100 bar, in solution, in suspension or in the gas phase, in the presence of a catalyst formed from a metallocene in the meso-form or a meso:rac mixture, with meso:rac>1:99, as transition-metal compound and a cocatalyst, wherein the metallocene is a compound of the formula I, in which M1 is Zr or Hf, R1 and R2 are identical or different and are methyl or chlorine, R3 and R6 are identical or different and are methyl, isopropyl, phenyl, ethyl or trifluoromethyl, R4 and R5 are hydrogen or as defined for R3 and R6, or R4 forms an aliphatic or aromatic ring with R6, or adjacent radicals R4 form a ring of this type, and R7 is a radical, and m plus n is zero or 1.

A compound of the formula I in its pure meso-form or as a meso:rac>1:99 mixture,

in which
M1 is a metal from group IVb, Vb or VIb of the Periodic Table,
R1 and R2 are identical or different and are a hydrogen atom, a C1-C10-alkyl group, a C1-C10-alkoxy group, a C6-C10-aryl group, a C6-C10-aryloxy group, a C2-C10-alkenyl group, a C7-C40-arylalkyl group, a C7-C40-alkylaryl group, a C8-C40-arylalkenyl group, or a halogen atom,
the radicals R4 and R5 are identical or different and are a hydrogen atom, a halogen atom, a C1-C10-alkyl group, which may be halogenated, a C6-C10-aryl group, which may be halogenated, or an —NR102, —SR10, —OSiR103, —SiR103 or —PR102 radical in which R10 is a halogen atom, a C1-C10-alkyl group or a C6-C10-aryl group,
R3 and R6 are identical or different and are as defined as for R4, with the proviso that R3 and R6 are not hydrogen,
or two or more of the radicals R3 to R6, together with the atoms connecting them, form a ring system,
>BR11, >AlR11, —Ge—, —Sn—, —O—, —S—, >SO, >SO2, >NR11, >CO, >PR11 or >P(O)R11,
where
R11 , R12 and R13 are identical or and R12 are different and are a hydrogen atom, a halogen atom, a C1-C10-alkyl group, a C1-C10-fluoroalkyl group, a C6-C10-aryl group, a C6-C10-fluoroaryl group, a C1-C10-alkoxy group, a C2-C10-alkenyl group, a C7-C40-arylalkyl group, a C8-C40-arylalkenyl group or a C7-C40-alkylaryl group,
R13 is a hydrogen atom, a halogen atom, a C1-C10-alkyl group, a C1-C10-fluoroalkyl group, a C6-C10-aryl group, a C6-C10-fluoroaryl group, a C1-C10-alkoxy group, a C2-C10-alkenyl group, a C7-C40-arylalkyl group, a C8-C40-arylalkenyl group or a C7-C40-alkylaryl group,
or R11 and R12 or R11 and R13, in each case together with the atoms connecting them, form a ring,
M2 is silicon, germanium or tin,
R8 and R9 are identical or different and are as defined for R11, and
m and n are identical or different and are zero, 1 or 2, where m plus n is zero, 1 or 2.

11 more elements

Abstract

Claims3