Process for the production of a polymer comprising monomeric units of ethylene, an A-olefin and a vinyl norbornene
View Patent ↗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 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.
1. A polymer comprising monomeric units of ethylene, an α-olefin and a vinyl norbornene, wherein
5≧[VNB]>1 and
Δδ>30−15*[VNB], provided that Δδ is not negative,
[VNB] is the content of vinyl norbornene in the polymer in weight % and
Δδ is, expressed in degrees, the difference between the phase angle δ at an angular frequency of 0.1 rad/s and the phase angle δ at an angular frequency of 100 rad/s, as measured by dynamic mechanical spectroscopy, at a temperature of 125° C.
2. Polymer according to claim 1 ,
wherein Δδ>35−15*[VNB].
3. The polymer of claim 1 , wherein 5≧[VNB]≧1.12.
4. Polymer according to claim 1 , wherein Δδ>25−12.5*(Q−2), wherein Q=Mw/Mn; Mw is the weight average molecular weight; and Mn is the number average molecular weight.
5. Polymer according to claim 2 , wherein Δδ>25−12.5*(Q−2), wherein Q=Mw/Mn; Mw is the weight average molecular weight; and Mn is the number average molecular weight.
6. Polymer according to claim 3 , wherein Δδ>25−12.5*(Q−2), wherein Q=Mw/Mn; Mw is the weight average molecular weight; and Mn is the number average molecular weight.