Catalyst systems and their use in metathesis reactions

Catalyst system (I), comprising a metathesis catalyst, which comprises a complex catalyst on basis of a metal from 6th or 8th subgroup and at least one carbene at the metal bonded ligand, and at least one boron compound (Z), is new. Catalyst system (I), comprising a metathesis catalyst, which comprises a complex catalyst on basis of a metal from 6th or 8th subgroup and at least one carbene at the metal bonded ligand, and at least one boron compound of formula (B(OR1a) 3) (Z), is new. R1a : alkyl, cycloalkyl, alkenyl, allyl, alkynyl, aryl, heteroaryl having at least one heteroatom of O or N, or (-CHZ 1>-CHZ 1>-A 2>) p-CH 2CH 3, where two or three residues of R1a are bridged; p : 1-10; Z 1>H or CH 3, where the non-adjacent carbon atoms of Z 1>are not equal; and A 2>O, S or NH. An independent claim is included for the molecular weight decomposition of nitrile rubber, where the nitrile rubber is a co- or terpolymer with at least one diene repetition units, at least one alpha , beta -conjugated-unsaturated nitrile and optionally one or more further copolymerizable monomer comprising reacting the nitrile rubber with (I) optionally in the presence of a co-olefin.

Patents:
EP 2,143,489

Inventor(s): MUELLER JULIA MARIA [DE]; NUYKEN OSKAR PROF DR [DE]; OBRECHT WERNER PROF DR [DE]

Type of Offer: Sale



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