Catalyst system and process for the polymerization of olefins

Details Catalyst system and process for the polymerization of olefins Catalyst system and process for the polymerization of olefins

2006-11-28

2006-11-28

Lu, Caixia (Department: 1713)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Organic compound containing

C502S103000, C502S152000, C502S414000, C526S165000, C526S160000, C526S348000, C526S352000, C526S943000, C556S170000, C556S179000

Reexamination Certificate

active

07141527

ABSTRACT:
A catalyst system for the polymerization of olefins comprising the product obtained by contacting:(A) a metallocene complex;(B) an organometallic aluminium compound of formula (II):in-line-formulae description="In-line Formulae" end="lead"?Al[CH2—C(Ar)R4R5]xHy  (II)in-line-formulae description="In-line Formulae" end="tail"?wherein Ar is a substituted or unsubstituted aryl group having from 6 to 20 carbon atoms; R4is a linear or branched, saturated or unsaturated, C1–C10alkyl, C6–C20aryl, C7–C20arylalkyl or C7–C20alkylaryl; R5is hydrogen or a linear or branched, saturated or unsaturated, C1–C10alkyl, C6–C20aryl, C7–C20arylalkyl or C7–C13alkylaryl group;x=2 or 3; y=3-x; andwater;the molar ratio (B)/(C) being between 1:1 and 100:1. These catalysts show an improved activity with respect to known catalysts, wherein different aluminium compounds are used.

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