Catalica composition and process for the copolymerization of olefins / co.

摘要

NEW COMPOSITIONS CATALYSTS CHARACTERIZED BY BE BASED ON: A) a palladium compound, b) an anion of an acid with a pKa of at least 2 but less than 6, and c) a bidentate ligand of the general formula R1R2M-R-MR3R4 WHERE M represents phosphorus, arsenic or antimony. R1, R2, R3 and R4 are hydrocarbyl groups which may, or may not be substituted with polar groups, with the proviso that at least one of R1-R4 represents an aryl group polar substituted alkyl containing at least one polar substituent ortho- RESPECT AM, YR REPRESENTS A ORGANICO bivalent bridging group containing at least two carbon atoms in the bridge.