CATALYST SYSTEM FOR OLEFIN POLYMERIZATION

摘要

It is disclosed a new catalyst system for the polymerization of olefins comprising the product obtainable by contacting the following components: (A) one or more compounds of a late transition metal belonging to Group 8-11 of the Periodic Table; and (B) the reaction product of water with one or more organometallic aluminum compounds of formula (IV): Al(CH2-CR<3>R<4>R<5>)xR<6>yHz, wherein R<3> is a C1-C20 alkyl, C3-C20 cycloalkyl or C7-C20 alkylaryl radical; R<4> is different from a straight alkyl and is a C3-C20 alkyl, C3-C20 cycloalkyl, C6-C20 aryl, C7-C20 alkylaryl or C7-C20 arylalkyl radical; or R<3> and R<4> form together a C4-C6 ring; R<5> is hydrogen or a C1-C20 alkyl, C6-C20 aryl, C7-C20 alkylaryl or arylalkyl radical; R<6> is a C1-C20 alkyl, C3-C20 cycloalkyl, C6-C20 aryl, C7-C20 alkylaryl or C7-C20 arylalkyl radical; x is 1-3; z is 0-1; and y is 3-x-z; the molar ratio between said organometallic aluminum compound and water being comprised between 0.5:1 and 100:1.