Process for manufacturing polyethylene with a functional end group in the presence of metallocene catalyst
OwnerDong Geun Shin, Doo Jin Byun +1inventors
InventorsDONG GEUN SHIN, DOO JIN BYUN, SANG YOUL KIM
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Abstract
The present invention relates to a process for manufacturing polyethylene with a functional end group in the presence of metallocene catalyst and more particularly, to the process for manufacturing polyethylene with a functional end group in such a manner that a highly reactive functional group of alkyl-aluminum is easily introduced to the end of polymer via a selective chain transfer reaction in the presence of (1) metallocene catalyst represented by the following formula 1 and (2) a cocatalyst containing alkyl-aluminum compound as active ingredient. 1
Claims8
A process for manufacturing polyethylene with functional end group represented by the following formula 2, wherein it comprises:
- polyethylene with terminal alkyl-aluminum group is prepared via selective chain transfer reaction in the catalytic system consisting of metallocene represented by the following formula 1 as a main catalyst and a cocatalyst containing an alkyl-aluminum compound represented by the following formula 3:
- a functional end group (X) is introduced to polyethylene using the polyethylene with terminal alkyl-aluminum group:
- 5
- Where, Ra, is a hydrogen atom or an alkyl group of 1 to 6 carbon atoms;
- Rb and Rc represent an alkyl-substituent structure of comonomer copolymerized with ethylene, wherein Rb is a substituent from comonomer structure consisting of an aliphatic group of 1 to 12 carbon atoms, an aromatic group, and an alicyclic group, while Rc represent a hydrogen atom or Rc is connected to Rb to generate a 5- or 6-membered ring;
- m is an integer of 10 to 1,000,000;
- and,
- n is 0 or an integer of 1 to 10,000;
- X, which represents a functional group attached to the end of polymer, is one of the following groups:
- an alkyl-aluminum group, a chloride group, a bromide group, an iodide group, a hydroxy group, and a carboxyl group.
- 6
- Where, M is a transition metal atom selected from Group IVB of the periodic table;
- R1, R2, R3, R4, R5, R6, R7, R8, R9 and R10, which are same or different, are a hydrogen atom or an alkyl group of 1 to 12 carbon atoms;
- at least two substituents should contain an alkyl group of 1 to 12 carbon atoms instead of a hydrogen atom;
- one or more substituents may be combined each other;
- X1 and X2, which are same or different, are a ligand except for a non-cyclopentadienyl ligand, representing such as an alkyl group of 1 to 12 carbon atoms, an alkoxy group of 1 to 6 carbon atoms, an amine group, a halogen atom, or a hydrogen atom.
- Al—(R)3 (3)
- Where, R is an alkyl group of 1 to 4 carbon atoms.
Dependencies are inferred from the claim text.