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US 8,067,511 B2Granted
Ethylene copolymer and a method of preparing the same
AssigneeSK Innovation Co., Ltd.
InventorsDaeho Shin, Choonsik Shim, Jisu Jeong, Sungseok Chae, Myungahn Ok, Seungbum Kwon, Dong-Cheol Shin, Ho-Seong Lee
Life of this patent
Estimating the term…
Abstract
Provided are ethylene copolymers and a process for preparing the same. More specifically, provided are ethylene copolymers exhibiting excellent processibility and physical properties due to its multimodal molecular weight distribution index, through a multi-stage process by using reactors connected in series or in parallel in the presence of catalyst composition containing transition metal catalyst, and a process for preparing the same.
Claims18
A process for preparing ethylene copolymer, which comprises
- (a) polymerizing ethylene and one or more C3-C18 α-olefin comonomer(s) in the presence of a catalyst composition containing a transition metal catalyst represented by Chemical Formula (1) in one or more adiabatic solution-phase reactor(s) equipped with feed cooler and feed heater to produce a first copolymer;
- and
- (b) passing the first copolymer prepared from stage (a) through at least one other adiabatic solution-phase reactor(s) equipped with feed cooler and feed heater and containing ethylene or ethylene and at least one C3-C18 α-olefin at a temperature higher than the reaction temperature of stage (a) in the presence of the same catalyst composition employed in stage (a) in order to prepare polymer of high temperature which contains ethylene and C3-C18 α-olefin copolymer composition,
- in the formula, M represents transition metal from Group 4 in the Periodic Table of Elements;
- Cp represents a cyclopentadienyl ring which is η5 bonded to the core metal M, or a ring system containing a fused cyclopentadienyl ring, in which the cyclopentadienyl ring or the ring system containing a fused cyclopentadienyl ring may be further substituted by one or more substituents selected from (C1-C20)alkyl, (C6-C30)aryl, (C2-C20)alkenyl and (C6-C30)ar(C1-C20)alkyl;
- R1 through R4 independently represent hydrogen atom, halogen atom, (C1-C20)alkyl, (C3-C20)cycloalkyl, (C6-C30)aryl, (C6-C30)ar(C1-C10)alkyl, (C1-C20)alkoxy, (C3-C20)alkylsiloxy, (C6-C30)arylsiloxy, (C1-C20)alkylamino, (C6-C30)arylamino, (C1-C20) alkylthio, (C6-C30)arylthio or nitro, or each of R1 through R4 may be linked to an adjacent substituent via (C3-C12)alkylene or (C3-C12) alkenylene with or without containing a fused ring to form an alicyclic ring, or a monocyclic or polycyclic aromatic ring;
- Ar1 represents (C6-C30)aryl or (C3-C30)heteroaryl containing one or more heteroatom(s) selected from N, O and S;
- X1 and X2 independently represent halogen atom, (C1-C20)alkyl, (C3-C20)cycloalkyl, (C6-C30)ar(C1-C20)alkyl, (C1-C20)alkoxy, (C3-C20)alkylsiloxy, (C6-C30) arylsiloxy, (C1-C20)alkylamino, (C6-C30)arylamino, (C1-C20)alkylthio, (C6-C30)arylthio, or
- wherein n is an integer of 1 or 2;
- R11 through R15 independently represent hydrogen atom, halogen atom, (C1-C20)alkyl, (C3-C20)cycloalkyl, (C6-C30)aryl, (C6-C30)ar(C1-C10)alkyl, (C1-C20)alkoxy, (C3-C20)alkylsiloxy, (C6-C30)arylsiloxy, (C1-C20)alkylamino, (C6-C30)arylamino, (C1-C20)alkylthio, (C6-C30)arylthio or nitro, or R11 through R15 may be linked to an adjacent substituent via (C3-C12)alkylene or (C3-C12) alkenylene with or without containing a fused ring to form an alicyclic ring, or a monocyclic or polycyclic aromatic ring;
- and
- the alkyl, aryl, cycloalkyl, aralkyl, alkoxy, alkylsiloxy, arylsiloxy, alkylamino, arylamino, alkylthio or arylthio of R1 through R4, R11 through R15, X1 and X2;
- the ring formed by linkage of each of R1 through R4 or R11 through R15 to an adjacent substituent via alkylene or alkenylene;
- or the aryl or heteroaryl of Ar1 and Ar11 may be further substituted by one or more substituent(s) selected from halogen atom, (C1-C20)alkyl, (C3-C20)cycloalkyl, (C6-C30)aryl, (C6-C30)ar(C1-C10)alkyl, (C1-C20)alkoxy, (C3-C20)alkylsiloxy, (C6-C30)arylsiloxy, (C1-C20)alkylamino, (C6-C30)arylamino, (C1-C20)alkylthio, (C6-C30)arylthio, nitro and hydroxyl.
11 more elements
A process for preparing ethylene copolymer, which comprises
- (a) polymerizing ethylene and one or more C3-C18 α-olefin comonomer(s) in the presence of a catalyst composition containing a transition metal catalyst represented by Chemical Formula (1) in one or more adiabatic solution-phase reactor(s) equipped with feed cooler and feed heater to produce a first copolymer;
- (b) reacting the ethylene or ethylene and one or more C3-C18 α-olefin at a temperature higher than the reaction temperature of stage (a) in the presence of the same catalyst composition employed in stage (a) in at least one other adiabatic solution-phase reactor(s) equipped with feed cooler and feed heater, in order to prepare a second copolymer;
- and
- (c) mixing the first copolymer with the second copolymer;
- in the formula, M represents transition metal from Group 4 in the Periodic Table of Elements;
- Cp represents a cyclopentadienyl ring which is η5 bonded to the core metal M, or a ring system containing a fused cyclopentadienyl ring, in which the cyclopentadienyl ring or the ring system containing a fused cyclopentadienyl ring may be further substituted by one or more substituents selected from (C1-C20) alkyl, (C6-C30)aryl, (C2-C20)alkenyl and (C6-C30)ar(C1-C20)alkyl;
- R1 through R4 independently represent hydrogen atom, halogen atom, (C1-C20)alkyl, (C3-C20)cycloalkyl, (C6-C30)aryl, (C6-C30)ar(C1-C10)alkyl, (C1-C20)alkoxy, (C3-C20)alkylsiloxy, (C6-C30)arylsiloxy, (C1-C20)alkylamino, (C6-C30)arylamino, (C1-C20)alkylthio, (C6-C30)arylthio or nitro, or each of R1 through R4 may be linked to an adjacent substituent via (C3-C12)alkylene or (C3-C12) alkenylene with or without containing a fused ring to form an alicyclic ring, or a monocyclic or polycyclic aromatic ring;
- Ar1 represents (C6-C30)aryl or (C3-C30)heteroaryl containing one or more heteroatom(s) selected from N, O and S;
- X1 and X2 independently represent halogen atom, (C1-C20)alkyl, (C3-C20)cycloalkyl, (C6-C30)ar(C1-C20)alkyl, (C1-C20)alkoxy, (C3-C20)alkylsiloxy, (C6-C30)arylsiloxy, (C1-C20)alkylamino, (C6-C30)arylamino, (C1-C20)alkylthio, (C6-C30)arylthio, or
- wherein n is an integer of 1 or 2;
- R11 through R15 independently represent hydrogen atom, halogen atom, (C1-C20)alkyl, (C3-C20)cycloalkyl, (C6-C30)aryl, (C6-C30)ar(C1-C10)alkyl, (C1-C20)alkoxy, (C3-C20)alkylsiloxy, (C6-C30)arylsiloxy, (C1-C20)alkylamino, (C6-C30)arylamino, (C1-C20)alkylthio, (C6-C30)arylthio or nitro, or R11 through R15 may be linked to an adjacent substituent via (C3-C12)alkylene or (C3-C12) alkenylene with or without containing a fused ring to form an alicyclic ring, or a monocyclic or polycyclic aromatic ring;
- and the alkyl, aryl, cycloalkyl, aralkyl, alkoxy, alkylsiloxy, arylsiloxy, alkylamino, arylamino, alkylthio or arylthio of R1 through R4, R11 through R15, X1 and X2;
- the ring formed by linkage of each of R1 through R4 or R11 through R15 to an adjacent substituent via alkylene or alkenylene;
- or the aryl or heteroaryl of Ar1 and Ar11 may be further substituted by one or more substituent(s) selected from halogen atom, (C1-C20)alkyl, (C3-C20)cycloalkyl, (C6-C30)aryl, (C6-C30)ar(C1-C10)alkyl, (C1-C20)alkoxy, (C3-C20)alkylsiloxy, (C6-C30)arylsiloxy, (C1-C20)alkylamino, (C6-C30)arylamino, (C1-C20)alkylthio, (C6-C30)arylthio, nitro and hydroxyl.
11 more elements
Dependencies are inferred from the claim text.