US5122491A
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Catalyst for polymerizing an olefin and process for polymerizing an olefin
Assignee: Mitsui Chemicals Inc
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Filing: 1988-04-19
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Granted: 1992-06-16
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Expires: 2008-04-19
Abstract
Abstract PCT No. PCT/JP88/00384 Sec. 371 Date Dec. 16, 1988 Sec. 102(e) Date Dec. 16, 1988 PCT Filed Apr. 19, 1988 PCT Pub. No. WO88/08432 PCT Pub. Date Nov. 3, 1988.An olefin is polymerized or copolymerized under the presence of an olefin-polymerizing catalyst prepared from (A) a transition-metal compound or (A') a transition-metal compound loaded on a fine-particle carrier, said transition metal being selected from group IVB in the periodic table; (B) an aluminoxane; and (C) an organoaluminum compound represented by the general formula [I] or [II]: R1mAl(OR2)3-m [I] R3nAl(OSiR43)3-n [II] wherein R1, R2, and R3 are selected from hydrocarbon radicals, R4 is selected from the group consisting of hydrocarbon, alkoxy, and aryloxy radicals, and m and n are positive numbers of 0<m<3 and 0<n<3. This catalyst has a significantly high polymerization activity, and the thus produced olefin polymer or copolymer has a narrow composition distribution, a high bulk density, and uniform grain size with little powdery product.
Inventors
- 👤 Mamoru Kioka
- 👤 Norio Kashiwa
- 👤 Toshiyuki Tsutsui
- 👤 Akinori Toyota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:06
CPC Classifications
C; C08; C08F; C08F10/00; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F4/659; C08F4/65912; C08F4/65916; C08F4/6592; Y; Y10; Y10S; Y10S526/00; Y10S526/904; Y10S526/943
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
95 words
A catalyst useful for the polymerization of an olefin prepared from (A) a compound selected from the group consisting of zirconium and hafnium compounds having a ligand including conjugated π electron, (B) an aluminoxane, and (C) an organoaluminum compound represented by the general formula (I) or (II): R.sup.1.sub.m Al(OR.sup.2).sub.3-m (I) R.sup.3.sub.n Al(OSiR.sup.4.sub.3).sub.3-n (II) wherein R 1 , R 2 and R 3 , independently of each other, are hydrocarbon radicals, R 4 is selected from the group consisting of hydrocarbon, alkoxy and aryloxy radicals, and m and n are positive numbers of 0<m<3 and 0<n<3.
Claim 2
Dependent Claim
95 words
A catalyst useful for the polymerization of an olefin prepared from (A) a compound selected from the group consisting of zirconium and hafnium compounds having a ligand including conjugated π electron, (B) an aluminoxane, and (C) an organoaluminum compound represented by the general formula (I) or (II): R.sup.1.sub.m Al(OR.sup.2).sub.3-m (I) R.sup.3.sub.n Al(OSiR.sup.4.sub.3).sub.3-n (II) wherein R 1 , R 2 and R 3 , independently of each other, are hydrocarbon radicals, R 4 is selected from the group consisting of hydrocarbon, alkoxy and aryloxy radicals, and m and n are positive numbers of 0<m<3 and 0<n<3.
Claim 3
Dependent Claim
138 words
The catalyst of claim 1 wherein said compound (A) is a compound represented by the general formula (III): R.sup.1'.sub.k,R.sup.2'.sub.1,R.sup.3'.sub.m,R.sup.4'.sub.n,Zr(III) wherein R 1' is unsubstituted or substituted cycloalkadienyl radical; R 2' , R 3' and R 4' are independently selected from the group consisting of cycloalkadienyl, aryl, alkyl, cycloalkyl aralkyl radicals, halogen atom, hydrogen, OR a , SR b , NR c 2 and PR d 2 , wherein R a , R b , R c and R d are hydrocarbon radicals independently selected from the group consisting of alkyl, cycloalkyl, aryl and aralkyl radicals and silyl radical, with the proviso that R c and R d may, taken together, form a ring; k'≧1; and k'+l'+m'+n'=4; and R 1' and R 2' may be bonded by an intervening lower alkylene radical when R 2' is a cycloalkadienyl radical.
Claim 4
Dependent Claim
61 words
The catalyst of claim 1 wherein, in formula (I) or (II), R 1 , R 2 and R 3 are independently selected from the group consisting of linear or branched, saturated or unsaturated, aliphatic hydrocarbon radical having 1 to 10 carbon atoms, alicyclic hydrocarbon radical having 4 to 10 carbon atoms; and aromatic hydrocarbon radical having 6 to 16 carbon atoms.
Claim 5
Dependent Claim
15 words
The catalyst of claim 3 wherein, in formula (I), R 1 is branched alkyl radical.
Claim 6
Dependent Claim
15 words
The catalyst of claim 3 wherein, in formula (II), R 3 is branched alkyl radical.
Claim 7
Dependent Claim
14 words
The catalyst of claim 3 wherein, in formula (I), R 2 is methyl radical.
Claim 8
Dependent Claim
56 words
The catalyst of claim 1 wherein, in formula (II), R 4 is selected from the group consisting of aliphatic hydrocarbon radical having 1 to 10 carbon atoms, alicyclic hydrocarbon radical having 4 to 10 carbon atoms, aromatic hydrocarbon radical having 6 to 16 carbon atoms, alkoxy radical having 4 to 10 carbon atoms, and aryloxy radical.
Claim 9
Dependent Claim
18 words
The catalyst of claim 1 wherein the organoaluminum compound (C) is a compound represented by the formula (I).
Claim 10
Dependent Claim
18 words
The catalyst of claim 1 wherein the organoaluminum compound (C) is a compound represented by the formula (II).
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-06-16 | 1995-12-16 | 1996-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-16 | 1999-12-16 | 2000-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-16 | 2003-12-16 | 2004-06-16 | $7700.00 | Window Closed / Lapsed |