Abstract:
The invention relates to a process for the preparation of a polymer comprising monomeric units of ethylene, an α-olefin and a vinyl norbornene applying as a catalyst system: a. a bridged or an unbridged group 4 metal containing an unbridged catalyst having a single cyclopentadienyl ligand and a mono substituted nitrogen ligand, wherein said catalyst is defined by the formula I: b. an aluminoxane activating compound, c. 0 - 0.20 mol per mol of the catalyst of a further activating compound,
wherein Y is a substituted carbon or nitrogen atom. The invention further relates to a polymer obtainable with the process of the invention.
Abstract:
A rubber composition containing based upon parts by weight per 100 parts by weight rubber (phr): (A) 20-50 phr of a copolymer of ethylene, at least one C3 to C23 α-olefin and a least one polyene monomer, whereby the copolymer unit derived from the polyene is 1 to 5 wt. %, by weight of the copolymer (A) and has a Mooney viscosity ML (1+4) at 100° C. from 51 or greater, in particular from 55 to 90 at 100° C., (B) 50-80 phr of butyl-type rubber and (C) a resin-based curative, containing a phenol formaldehyde resin cross-linker as only curing agent and an activator package comprising of metal oxide and a halogen donor where a halogenated component (B) or halogenated cross-linker as part of component (C) not already present.
Abstract:
A metal complex of the formula (1 ) CyLMZp(A)n (1 ), wherein M is a group 4 metal Z is an anionic ligand, p is number of 1 to 2, preferably 2, Cy is a cyclopentadienyl-type ligand substituted with at least one aliphatic C3-C20 hydrocarbyl group, which is bonded to the cyclopentadienyl-type ligand, in particular to its cyclopentadienyl ring, via a secondary, a tertiary or quaternary carbon atom and, L is an amidinate ligand of the formula (2), wherein the amidine-containing ligand is covalently bonded to the metal M via the imine nitrogen atom, and Sub1 is a substituent comprising a group 14 atom through which Sub1 is bonded to the imine carbon atom and Sub2 is a substituent comprising a heteroatom of group 15, through which Sub2 is bonded to the imine carbon atom and A is a neutral Lewis base ligand selected from the list consisting of ether, thioether, amine, tertiary phosphane, imine, nitrile and isonitrile,wherein the number of said metal ligands "n" is in the range of 0 to the amount that specifies the 18-electron rule.