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US4952540A
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Finely divided aluminoxane, process for producing same and its use
Assignee: Mitsui Chemicals Inc
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Filing: 1988-02-11
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Granted: 1990-08-28
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Expires: 2008-02-11
Abstract
Abstract A finely divided aluminoxane comprising an aluminoxane represented by formula [I] or [II] ##STR1## wherein R denotes a hydrocarbon group having 1 to 10 carbon atoms and m denotes an integer of 2 to 50, an average particle size being 5 to 200 μm and a specific an average particle size being 5 to 200 μm and a specific surface area being 20 to 1000 m 2 /g, a process for producing same, and a catalyst component for polymerization of olefins being said finely divided aluminoxane.
Inventors
- 👤 Mamoru Kioka
- 👤 Norio Kashiwa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:44
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/42; C08F4/44; C08F4/52; C08G; C08G79/00; C08G79/10; C07; C07F; C07F5/00; C07F5/06; C07F5/061; C07F5/066; C07F5/068; C08F10/00; C08F4/60; C08F4/62; C08F4/64; C08F4/659; C08F4/65912; C08F4/6592; Y; Y10; Y10S; Y10S526/00; Y10S526/904; Y10S526/908; Y10S526/943
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
56 words
A finely divided aluminoxane comprising an aluminoxane represented by formula [I] or [II] ##STR15## wherein R denotes a hydrocarbon group having 1 to 10 carbon atoms and m denotes an integer of 2 to 50, an average particle size being 5 to 200 μm and a specific surface area being 20 to 1,000 m 2 /g.
Claim 2
Dependent Claim
56 words
A finely divided aluminoxane comprising an aluminoxane represented by formula [I] or [II] ##STR15## wherein R denotes a hydrocarbon group having 1 to 10 carbon atoms and m denotes an integer of 2 to 50, an average particle size being 5 to 200 μm and a specific surface area being 20 to 1,000 m 2 /g.
Claim 3
Dependent Claim
59 words
The finely divided aluminoxane of claim 1 comprising an aluminoxane represented by formula [I] or [II] ##STR16## wherein R denotes a hydrocarbon group having 1 to 4 carbon atoms and m denotes an integer of 6 to 40, an average particle size being 10 to 100 μm and a specific surface area being 50 to 500 m 2 /g.
Claim 4
Dependent Claim
20 words
The finely divided aluminoxane of claim 2 wherein a density of the finely divided aluminoxane is 0.7 to 1.7 g/ml.
Claim 5
Dependent Claim
20 words
The finely divided aluminoxane of claim 2 wherein a density of the finely divided aluminoxane is 0.9 to 1.5 g/ml.
Claim 6
Dependent Claim
37 words
The finely divided aluminoxane of claim 2 wherein the aluminoxane of formula [I] or [II] is methylaluminoxane or an aluminoxane composed of mixed oxyaluminum units of formula ##STR17## containing at least an oxymethylaluminum unit of formula ##STR18##
Claim 7
Dependent Claim
37 words
The finely divided aluminoxane of claim 3 wherein the aluminoxane of formula [I] or [II] is methylaluminoxane or an aluminoxane composed of mixed oxyaluminum units of formula ##STR19## containing at least an oxymethylaluminum unit of formula ##STR20##
Claim 8
Dependent Claim
37 words
The finely divided aluminoxane of claim 4 wherein the aluminoxane of formula [I] or [II] is methylaluminoxane or an aluminoxane composed of mixed oxyaluminum units of formula ##STR21## containing at least an oxymethylaluminum unit of formula ##STR22##
Claim 9
Dependent Claim
55 words
The finely divided aluminoxane of claim 1 wherein in formula [I] or [II] R is a methyl group and m is an integer of 10 to 30, an average particle size is 20 to 60 μm, a specific surface area is 100 to 300 m 2 /g and a density is 0.9 to 1.5 g/ml.
Claim 10
Dependent Claim
60 words
A process for producing a finely divided aluminoxane which comprises contacting a solution of an aluminoxane represented by formula [I] or [II] ##STR23## wherein R denotes a hydrocarbon group having 1 to 10 carbon atoms and m denotes an integer of 2 to 50, with an aluminoxane-insoluble or -sparingly soluble solvent to precipitate a finely divided solid aluminoxane in suspension.
Claim 11
Dependent Claim
60 words
A process for producing a finely divided aluminoxane which comprises contacting a solution of an aluminoxane represented by formula [I] or [II] ##STR23## wherein R denotes a hydrocarbon group having 1 to 10 carbon atoms and m denotes an integer of 2 to 50, with an aluminoxane-insoluble or -sparingly soluble solvent to precipitate a finely divided solid aluminoxane in suspension.
Claim 12
Dependent Claim
57 words
The process of claim 9 which comprises contacting a solution of an aluminoxane represented by formula [I] or [II] ##STR24## wherein R denotes a hydrocarbon group having 1 to 4 carbon atoms and m denotes an integer of 6 to 40, with an aluminoxane-insoluble or -sparingly soluble solvent to precipitate a finely divided solid aluminoxane in suspension.
Claim 13
Dependent Claim
34 words
The process of claim 9 wherein the resulting finely divided solid aluminoxane has an average particle size of 10 to 100 μm and a specific surface area of 50 to 500 m 2 /g.
Claim 14
Dependent Claim
34 words
The process of claim 10 wherein the resulting finely divided solid aluminoxane has an average particle size of 10 to 100 μm and a specific surface area of 50 to 500 m 2 /g.
Claim 15
Dependent Claim
20 words
The process of claim 11 wherein the resulting finely divided solid aluminoxane has a density of 0.7 to 1.7 g/ml.
Claim 16
Dependent Claim
20 words
The process of claim 12 wherein the resulting finely divided solid aluminoxane has a density of 0.7 to 1.7 g/ml.
Claim 17
Dependent Claim
20 words
The process of claim 9 wherein an aliphatic or alicyclic hydrocarbon is used as the aluminoxane-insoluble or -sparingly soluble solvent.
Claim 18
Dependent Claim
20 words
The process of claim 10 wherein an aliphatic or alicyclic hydrocarbon is used as the aluminoxane-insoluble or -sparingly soluble solvent.
Claim 19
Dependent Claim
35 words
The process of claim 9 wherein the aluminoxane of formula [I] or [II] is methylaluminoxane or an aluminoxane composed of mixed oxyaluminum units of formula ##STR25## containing at least an oxymethylaluminum unit of formula ##STR26##
Claim 20
Dependent Claim
35 words
The process of claim 10 wherein the aluminoxane of formula [I] or [II] is methylaluminoxane or an aluminoxane composed of mixed oxyaluminum units of formula ##STR27## containing at least an oxymethylaluminum unit of formula ##STR28##
Claim 21
Dependent Claim
34 words
The process of claim 9 wherein the aluminoxane-insoluble or -sparingly soluble solvent is used in an amount of 10 to 10,000 parts by weight per 100 parts by weight of the solution of aluminoxane.
Claim 22
Dependent Claim
34 words
The process of claim 10 wherein the aluminoxane-insoluble or -sparingly soluble solvent is used in an amount of 10 to 10,000 parts by weight per 100 parts by weight of the solution of aluminoxane.
Claim 23
Dependent Claim
49 words
The process of claim 9 which comprises contacting a solution of an aluminoxane of formula [I] or [II] wherein R is a methyl group and m is an integer of 10 to 30 with an aluminoxane-insoluble or -sparingly soluble solvent to precipitate a finely divided solid aluminoxane in suspension.
Claim 24
Dependent Claim
52 words
A process for producing a finely divided aluminoxane which comprises spray drying a solution of an aluminoxane represented by formula [I] or [II] ##STR29## wherein R denotes a hydrocarbon group having 1 to 10 carbon atoms and m denotes an integer of 6 to 50, to form a finely divided solid aluminoxane.
Claim 25
Dependent Claim
52 words
A process for producing a finely divided aluminoxane which comprises spray drying a solution of an aluminoxane represented by formula [I] or [II] ##STR29## wherein R denotes a hydrocarbon group having 1 to 10 carbon atoms and m denotes an integer of 6 to 50, to form a finely divided solid aluminoxane.
Claim 26
Dependent Claim
47 words
The process of claim 22 which comprises spray drying a solution of an aluminoxane represented by formula [I] or [II] ##STR30## wherein R denotes a hydrocarbon group to 4 carbon atoms and m denotes an integer of 6 to 40, to form a finely divided solid aluminoxane.
Claim 27
Dependent Claim
34 words
The process of claim 22 wherein the resulting finely divided solid aluminoxane has an average particle size of 10 to 100 μm and a specific surface area of 50 to 500 m 2 /g.
Claim 28
Dependent Claim
34 words
The process of claim 23 wherein the resulting finely divided solid aluminoxane has an average particle size of 10 to 100 μm and a specific surface area of 50 to 500 m 2 /g.
Claim 29
Dependent Claim
20 words
The process of claim 24 wherein the resulting finely divided solid aluminoxane has a density of 0.7 to 1.7 g/ml.
Claim 30
Dependent Claim
20 words
The process of claim 25 wherein the resulting finely divided solid aluminoxane has a density of 0.7 to 1.7 g/ml.
Claim 31
Dependent Claim
55 words
The process of claim 22 wherein the solution of the aluminoxane is sprayed using an inert gas heated at a temperature 10° to 500° C. higher than the boiling point of the solvent by means of a two-fluid nozzle maintained at a temperature 5° to 50° C. lower than the boiling point of the solvent.
Claim 32
Dependent Claim
55 words
The process of claim 23 wherein the solution of the aluminoxane is sprayed using an inert gas heated at a temperature 10° to 500° C. higher than the boiling point of the solvent by means of a two-fluid nozzle maintained at a temperature 5° to 50° C. lower than the boiling point of the solvent.
Claim 33
Dependent Claim
35 words
The process of claim 22 wherein the aluminoxane of formula [I] or [II] is methylaluminoxane or an aluminoxane composed of mixed oxyaluminum units of formula ##STR31## containing at least an oxymethylaluminum unit of formula ##STR32##
Claim 34
Dependent Claim
35 words
The process of claim 23 wherein the aluminoxane of formula [I] or [II] is methylaluminoxane or an aluminoxane composed of mixed oxyaluminum units of formula ##STR33## containing at least an oxymethylaluminum unit of formula ##STR34##
Claim 35
Dependent Claim
43 words
The process of claim 22 which comprises spray drying a solution of an aluminoxane represented by formula [I] or [II] ##STR35## wherein R denotes a methyl group and m denotes an integer of 10 to 30, to form a finely divided solid aluminoxane.
References Cited (Backward Citations)
US3231550A
Cited
US4055510A
Cited
US4311817A
Cited
US4293673A
Cited
US4404344A
Cited
US4424138A
Cited
US4410672A
Cited
US4530914A
Cited
EP0206794A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-27 | 1994-02-26 | 1994-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-27 | 1998-02-26 | 1998-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-27 | 2002-02-26 | 2002-08-28 | $7700.00 | Window Closed / Lapsed |