US 2020/0270382 A1 · CATALYST COMPOSITION FOR PREPARING ELASTIC COPOLYMER, AND METHOD FOR PREPARING ELASTIC COPOLYMER, WHICH COMPRISES ETHYLENE AND ALPHA-OLEFIN OR ETHYLENE, ALPHA-OLEFIN AND UNCONJUGATED DIENE, BY USING SAME

Abstract

The present invention relates to a method for preparing an ethylene-based elastic copolymer, and more particularly, to a method for preparing an ethylene-based elastic copolymer by using a catalyst composition for preparing an ethylene-based elastic copolymer, the catalyst composition comprising a binuclear constrained geometry transition metal compound, as a main catalyst, having a structural advantage to obtain a high-molecular-weight ethylene-based elastic copolymer due to a high polymerization activity and comonomer reactivity because the binuclear constrained geometry transition metal compound has a structure in which cyclopentadiene ligands of two constrained geometry catalysts are linked by 1,4-phenylene, and one or more cocatalyst compounds selected from the group consisting of an organoaluminum compound, an organoaluminoxane compound, and a boron compound.

Claims5

Dependent claims

A method for preparing an ethylene-based elastic copolymer by using a binuclear constrained geometry transition metal catalyst composition for preparing an ethylene-based elastic copolymer, the binuclear constrained geometry transition metal catalyst composition comprising a binuclear constrained geometry transition metal compound represented by the following Formula 1;

and one or more cocatalyst compounds selected from the group consisting of an organoaluminum compound, an organoaluminoxane compound, and a boron compound,
wherein the ethylene-based elastic copolymer is a copolymer of ethylene, α-olefin and C4-C30 diene,
the α-olefin is propylene,
a polymerization temperature is in a range of 100 to 200° C.,
an ethylene conversion is 60 to 80%,
a propylene conversion is 40 to 50%, and
a content of the propylene in the ethylene-based elastic copolymer is 40 to 70 wt %.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/635,522Filed 15 Nov 2018

Priority

KR 10-2017-015225915 Nov 2017

Published

27 Aug 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

C08F 210/16
Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond: copolymers of ethene with alpha-alkenes, e.g. EP…
C08F 210/18
Copolymers of ethene with alpha-alkenes, e.g. EP rubbers: with non-conjugated dienes, e.g. EPT rubbers
C07F 17/00
Metallocenes
C08F 4/65908
Component covered by group C08F4/64 containing a transition metal-carbon bond: in combination with an ionising compound other than alumoxane, e.g.…

Catalyst composition for preparing elastic copolymer, and method for preparing elastic copolymer, which comprises ethylene and alpha-olefin or ethylene, alpha-olefin and unconjugated diene, by using same

Life of this patent

Catalyst composition for preparing elastic copolymer, and method for preparing elastic copolymer, which comprises ethylene and alpha-olefin or ethylene, alpha-olefin and unconjugated diene, by using same

Life of this patent

Abstract

Claims5