US Patent:
20040097672, May 20, 2004
Inventors:
Jerome Claverie - Dover NH, US
Remi Soula - Saint-Priest, FR
Roger Spitz - Lyon, FR
International Classification:
B01J031/00
C07F015/00
C07F009/70
C07F009/90
US Classification:
526/172000, 526/317100, 526/319000, 502/150000, 556/016000, 556/064000
Abstract:
The invention concerns a catalyst for olefin polymerisation, of formula (I) wherein: E is an oxygen or sulphur atom; X is a phosphorus, arsenic or antimony atom; M is a nickel, palladium or platinum atom comprising a non-attributed valency; a is 1 or 2; R, R, R, identical or different can be selected among hydrogen, alkyl, cycloalkyl, aryl, alkylaryl, arylalkyl radicals, the hydroxyl radical, the alkoxide radicals (with 1 to 20 carbon atoms), the groups —C(O)OR′—, —SOY; and Z represents a hydrocarbon radical comprising 2 to 3 carbon atoms; R represents a hydrocarbon radical of valency a, provided that at least one of the radicals Z or R bears at least an electroattractive substituent.