US5599761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ionic metallocene catalyst compositions
Assignee: Exxon Mobil Corp
•
Filing: 1995-05-25
•
Granted: 1997-02-04
•
Expires: 2015-05-25
Abstract
Abstract An ionic catalyst system component comprising a water-stable anion having a plurality of lipophilic radicals covalently coordinated to and shielding a central, formal charge bearing metal or metalloid atom, in which the lipophilic radicals of the anion include substituted aromatic radicals useful for polymerizing olefins, diolefins, or acetylenically unsaturated monomers, either alone or in combination with each other or with other polymerizable monomers is disclosed. A method of using the anion to stabilize ionic catalyst systems during polymerization is also disclosed.
Inventors
- 👤 Howard W. Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:37
CPC Classifications
C; C08; C08F; C08F10/00; C07; C07F; C07F17/00; C08F110/00; C08F110/02; C08F110/04; C08F110/06; C08F210/00; C08F210/04; C08F210/06; C08F210/16; C08F210/18; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F4/659; C08F4/6592; C08F4/65922; C08F4/65925; C08F4/65927; Y; Y10; Y10S; Y10S526/00; Y10S526/943
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
88 words
A method of stabilizing an active ionic polymerization catalyst species comprising stabilizing said species with an anion represented by the general formula: ]BAr.sub.1 Ar.sub.2 X.sub.3 X.sub.4 ].sup.- wherein: B is boron in a valence state of 3; Ar 1 and Ar 2 are the same or different substituted-aromatic hydrocarbon radicals which radicals may be linked to each other through a stable bridging group; and X 3 and X 4 are, independently, selected from the group consisting of hydride radicals, halide radicals, hydrocarbyl radicals, substituted-hydrocarbyl radicals, and organometalloid radicals.
Claim 2
Independent Claim
88 words
A method of stabilizing an active ionic polymerization catalyst species comprising stabilizing said species with an anion represented by the general formula: ]BAr.sub.1 Ar.sub.2 X.sub.3 X.sub.4 ].sup.- wherein: B is boron in a valence state of 3; Ar 1 and Ar 2 are the same or different substituted-aromatic hydrocarbon radicals which radicals may be linked to each other through a stable bridging group; and X 3 and X 4 are, independently, selected from the group consisting of hydride radicals, halide radicals, hydrocarbyl radicals, substituted-hydrocarbyl radicals, and organometalloid radicals.
Claim 3
Dependent Claim
20 words
The method of claim 1, wherein at least one of An 1 or Ar 2 is substituted with fluoro radicals.
Claim 4
Dependent Claim
24 words
The method of claim 1 wherein at least one of Ar 1 , Ar 2 , X 3 or X 4 orthosubstituted aromatic ring.
Claim 5
Dependent Claim
10 words
The method of claim 1 wherein said anion is tetra-(pentafluorophenyl)boron.
Claim 6
Dependent Claim
14 words
The method of claim 1 wherein Ar 1 and Ar 2 are perfluorophenyl radicals.
Claim 7
Dependent Claim
13 words
The method of claim 5 wherein X 3 is also a perfluorophenyl radical.
Claim 8
Dependent Claim
15 words
The method of claim 6 wherein X 4 is a straight or branched alkyl radical.
Claim 9
Independent Claim
53 words
A method of stabilizing an active ionic polymerization catalyst species comprising stabilizing said species with a water-stable anion containing a plurality of lipophilic radicals covalently coordinated to and shielding a central, formal charge bearing metal or metalloid atom, in which the lipophilic radicals of the anion include at least one substituted aromatic radical.
Claim 10
Independent Claim
53 words
A method of stabilizing an active ionic polymerization catalyst species comprising stabilizing said species with a water-stable anion containing a plurality of lipophilic radicals covalently coordinated to and shielding a central, formal charge bearing metal or metalloid atom, in which the lipophilic radicals of the anion include at least one substituted aromatic radical.
Claim 11
Dependent Claim
15 words
The method of claim 8 wherein said metal or metalloid atom is boron or aluminum.
Claim 12
Dependent Claim
16 words
The method of claim 8 wherein the lipophilic radicals include at least one orthosubstituted aromatic ring.
Claim 13
Dependent Claim
11 words
The method of claim 8 wherein said aromatic radical is perfluoro-substituted.
Claim 14
Dependent Claim
10 words
The method of claim 11 wherein said anion is tetra(pentafluorophenyl)boron.
References Cited (Backward Citations)
US3860501A
Cited
US4139681A
Cited
EP0129368A1
Cited
EP0200351A2
Cited
US4752597A
Cited
EP0323454A1
Cited
US5241025A
Cited
EP0277004A1
Cited
EP0277003A1
Cited
US5384299A
Cited
US5198401A
Cited
US5278119A
Cited
US5153157A
Cited
EP0478913A1
Cited
US5084534A
Cited
US5017714A
Cited
US5162278A
Cited
US5155080A
Cited
US5223467A
Cited
US5223468A
Cited
WO1991002012A1
Cited
US5064802A
Cited
EP0427697B1
Cited
EP0427696A2
Cited
EP0423100A2
Cited
EP0426637B1
Cited
EP0426638A2
Cited
WO1992000333A2
Cited
EP0468651A1
Cited
EP0495375A2
Cited
WO1993005082A1
Cited
WO1993008221A2
Cited
US5427991A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-02-04 | 2000-08-05 | 2001-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-02-04 | 2004-08-05 | 2005-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-02-04 | 2008-08-05 | 2009-02-04 | $7700.00 | Window Closed / Lapsed |