US5385877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of alpha-olefin polymers
Assignee: Mitsubishi Chemical Corp
•
Filing: 1992-02-07
•
Granted: 1995-01-31
•
Expires: 2012-02-07
Abstract
Abstract A catalyst for alpha -olefin polymerization which comprises the following components (A) and (B): component (A), which is a transition metal compound represented by the formula Q(C5H4-mR1m)(C5H4-nR2n)MeXY wherein (C5H4-mR1m) and (C5H4-nR2n) respectively represent a conjugated five-membered ring ligand coordinating to a metal Me; R1 and R2 which may be the same or different and a plurality of each of which can be bonded together, respectively represent a hydrocarbyl group having 1 to 20 carbon atoms, a halogen atom, an alkoxy group, a silicon-containing hydrocarbyl group, a phosphorus-containing hydrocarbyl group, a nitrogen-containing hydrocarbyl group or a boron-containing hydrocarbyl group; Q represents a bonding group which crosslinks the two conjugated five-membered ring ligand; Me represents a transition metal of the IVB-VIB group in the Periodic Table; X and Y, which may be the same or different, respectively represent hydrogen, a halogen atoms, a hydrocarbyl group, an alkoxy group, an amino group, a phosphorus-containing hydrocarbyl group or a silicon-containing hydrocarbyl group; m denotes an integer of 0</=m</=4 and n denotes an integer of 0</=n</=4; component (B), which is a methylisobutylalumoxane which satisfies the following conditions (a), (b) and (c): (a) the molar ratio of a methyl group to an isobutyl group being in the range of 4:1 to 1:4, (b) the chemical shift of 27Al-NMR being in the range of 160 ppm to 250 ppm and the peak having a half-height width of no smaller than 3000 Hz, and (c) it has a repeating unit of Al-O in an amount of 2 to 100. The methylisobutylalumoxane is assumed to be novel.
Inventors
- 👤 Takashi Fujita
- 👤 Toshihiko Sugano
- 👤 Hideshi Uchino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:38
CPC Classifications
C; C08; C08F; C08F10/00; C07; C07F; C07F17/00; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/639; C08F4/63912; C08F4/6392; C08F4/63922; C08F4/63927
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
272 words
A catalyst for α-olefin polymerization which comprises the following components (A) and (B): component (A), which is a transition metal compound represented by the formula Q(C.sub.5 H.sub.4-m R.sup.1.sub.m)(C.sub.5 H.sub.4-n R.sup.2.sub.n)MeXY wherein (C 5 H 4-m R 1 m ) and (C 5 H 4-n R 2 n ) respectively represent a conjugated five-membered ring ligand coordinating to a metal Me; R 1 and R 2 , which may be the same or different and a plurality of each of which can be bonded together, respectively represent a hydrocarbyl group having 1 to 20 carbon atoms, a halogen atom, an alkoxy group, a silicon-containing hydrocarbyl group, a phosphorus-containing hydrocarbyl group, a nitrogen-containing hydrocarbyl group or a boron-containing hydrocarbyl group; Q represents a bonding group which crosslinks the two conjugated five-membered ring ligands; Me represents a transition metal of the IVB-VIB group in the Periodic Table; X and Y, which may be the same or different, respectively represent hydrogen, a halogen atoms, a hydrocarbyl group, an alkoxy group, an amino group, a phosphorus-containing hydrocarbyl group or a silicon-containing hydrocarbyl group; m denotes an integer of 0≦m≦4 and n denotes an integer of 0≦n≦4; component (B), which is a methylisobutylalumoxane which satisfies the following conditions (a), (b) and (c): (a) the molar ratio of a methyl group to an isobutyl group is in the range of 4:1 to 1:4, (b) the chemical shift of 27 Al-NMR is in the range of 160 ppm to 250 ppm and the peak has a half-height width of no smaller than 3000 Hz, and (c) it has a repeating unit of Al--O in an amount of 2 to 100.
Claim 2
Dependent Claim
272 words
A catalyst for α-olefin polymerization which comprises the following components (A) and (B): component (A), which is a transition metal compound represented by the formula Q(C.sub.5 H.sub.4-m R.sup.1.sub.m)(C.sub.5 H.sub.4-n R.sup.2.sub.n)MeXY wherein (C 5 H 4-m R 1 m ) and (C 5 H 4-n R 2 n ) respectively represent a conjugated five-membered ring ligand coordinating to a metal Me; R 1 and R 2 , which may be the same or different and a plurality of each of which can be bonded together, respectively represent a hydrocarbyl group having 1 to 20 carbon atoms, a halogen atom, an alkoxy group, a silicon-containing hydrocarbyl group, a phosphorus-containing hydrocarbyl group, a nitrogen-containing hydrocarbyl group or a boron-containing hydrocarbyl group; Q represents a bonding group which crosslinks the two conjugated five-membered ring ligands; Me represents a transition metal of the IVB-VIB group in the Periodic Table; X and Y, which may be the same or different, respectively represent hydrogen, a halogen atoms, a hydrocarbyl group, an alkoxy group, an amino group, a phosphorus-containing hydrocarbyl group or a silicon-containing hydrocarbyl group; m denotes an integer of 0≦m≦4 and n denotes an integer of 0≦n≦4; component (B), which is a methylisobutylalumoxane which satisfies the following conditions (a), (b) and (c): (a) the molar ratio of a methyl group to an isobutyl group is in the range of 4:1 to 1:4, (b) the chemical shift of 27 Al-NMR is in the range of 160 ppm to 250 ppm and the peak has a half-height width of no smaller than 3000 Hz, and (c) it has a repeating unit of Al--O in an amount of 2 to 100.
Claim 3
Dependent Claim
37 words
The catalyst for α-olefin polymerization according to claim 1, wherein the groups (C 5 H 4-m R 1 m ) and (C 5 H 4-n R 2 n ) of said transition metal compound are the same.
Claim 4
Dependent Claim
45 words
The catalyst for α-olefin polymerization according to claim 1, wherein the groups (C 5 H 4-m R 1 m ) and (C 5 H 4-n R 2 n ) are selected from the group consisting of substituted or non-substituted cyclopentadienyl, indenyl and fluorenyl groups, respectively.
Claim 5
Dependent Claim
94 words
The catalyst for α-olefin polymerization according to claim 1, wherein Q is (a) a lower alkylene group or a cycloalkylene group which may or may not have a substituent that is an alkyl, alicyclic and/or aromatic group and has 1 to 15 carbon atoms, (b) a silylene or oligosilylene group which may or may not have a substituent that is an alkyl, alicyclic and/or aromatic group and has 1 to 12 carbon atoms, and (c) a hydrocarbyl group containing therein an element selected from the group consisting of germanium, phosphorus, nitrogen, boron and aluminum.
Claim 6
Dependent Claim
68 words
The catalyst for α-olefin polymerization according to claim 4, wherein Q is a lower alkylene group which may or may not have a substituent that is an alkyl, alicyclic and/or aromatic group and has 1 to 15 carbon atoms or a silylene or oligosilylene group which may or may not have a substituent that is an alkyl, alicyclic and/or aromatic group and has 1 to 12 carbon atoms.
Claim 7
Dependent Claim
16 words
The catalyst for α-olefin polymerization according to claim 1, wherein Me is titanium, zirconium or hafnium.
Claim 8
Dependent Claim
26 words
The catalyst for α-olefin polymerization according to claim 1, wherein X and Y contain 1 to 20 carbon atoms when they have a hydrocarbyl moiety, respectively.
Claim 9
Dependent Claim
92 words
The catalyst for α-olefin polymerization according to claim 1, wherein the methylisobutylalumoxane is represented by the following formula (I) or (II): ##STR3## wherein R 3 and R 4 represent a methyl group or an isobutyl group, respectively, the methyl group and the isobutyl group being arranged in block or at random in the molecule; p and q denote an integer of at least 1, respectively, the sum of p+q being in the range of 2 to 100; and the ratio of p to q is in the range of 4:1 to 1:4.
Claim 10
Dependent Claim
22 words
The catalyst for α-olefin polymerization according to claim 8, wherein the sum of p+q is in the range of 4 to 50.
Claim 11
Dependent Claim
22 words
The catalyst for α-olefin polymerization according to claim 8, wherein the sum of p+q is in the range of 8 to 20.
Claim 12
Dependent Claim
45 words
The catalyst of claim 1, wherein said 27 Al-NMR of said methylisobutylalumoxane is obtained when 2.5 mL of a toluene solution of said methylisobutylalumoxane compound, in a concentration of 6 to 7% by weight based on aluminum atoms, and 0.5 mL of deutero-benzene are admixed.
Claim 13
Dependent Claim
104 words
A methylisobutylalumoxane which satisfies the following conditions: (a) the molar ratio of a methyl group to an isobutyl group is in the range of 4:1 to 1:4, (b) the chemical shift of 27 AL-NMR is in the range of 160 ppm to 250 ppm and the peak has a half-height width of no smaller than 3000 Hz, and (c) it has a repeating unit of Al--O in an amount of 2 to 100 as combined with a compound of the group IVB to VIB of the Periodic Table having at least one π electron conjugated ligand to form a catalyst for polymerization of α-olefins.
Claim 14
Dependent Claim
104 words
A methylisobutylalumoxane which satisfies the following conditions: (a) the molar ratio of a methyl group to an isobutyl group is in the range of 4:1 to 1:4, (b) the chemical shift of 27 AL-NMR is in the range of 160 ppm to 250 ppm and the peak has a half-height width of no smaller than 3000 Hz, and (c) it has a repeating unit of Al--O in an amount of 2 to 100 as combined with a compound of the group IVB to VIB of the Periodic Table having at least one π electron conjugated ligand to form a catalyst for polymerization of α-olefins.
References Cited (Backward Citations)
US5003019A
Cited
EP0285443B1
Cited
US4978730A
Cited
US5006500A
Cited
EP0372617A2
Cited
US5086024A
Cited
WO1991005810A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-01-30 | 1998-08-01 | 1999-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-30 | 2002-08-01 | 2003-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-30 | 2006-08-01 | 2007-01-31 | $7700.00 | Window Closed / Lapsed |