EP0279586B1
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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: 1994-05-04
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Expires: 2008-02-11
Abstract
No abstract record available.
Inventors
- 👤 Mamoru Kioka
- 👤 Norio Kashiwa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 15:23
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: 12
Claim 1
Independent Claim
55 words
A finely divided aluminoxane comprising an aluminoxane represented by formula [I] or [II] wherein R denotes a hydrocarbon group having 1 to 10 carbon atoms and m denotes an integer of 2 to 50, and having an average particle size of 5 to 200 µm and a specific surface area of 20 to 1,000 m²/g.
Claim 2
Dependent Claim
46 words
An aluminoxane according to claim 1 wherein R denotes a hydrocarbon group having 1 to 4 carbon atoms and m denotes an integer of 6 to 40, the average particle size is 10 to 100 µm and the specific surface area is 50 to 500 m²/g.
Claim 3
Dependent Claim
16 words
An aluminoxane according to claim 1 or 2 wherein the density is 0.7 to 1.7 g/ml.
Claim 4
Dependent Claim
14 words
An aluminoxane according to claim 3 wherein the density is 0.9 to 1.5 g/ml.
Claim 5
Dependent Claim
38 words
An aluminoxane according to any one of the preceding claims wherein the aluminoxane of formula [I] or [II] is methylaluminoxane or an aluminoxane composed of mixed oxyaluminum units of formula containing at least an oxymethylaluminum units of formula
Claim 6
Dependent Claim
56 words
An aluminoxane according to any one of the preceding claims wherein in formula [I] or [II] R is a methyl group and m is an integer of 10 to 30, the average particle size is 20 to 60 µm, the specific surface area is 100 to 300 m²/g and the density is 0.9 to 1.5 g/ml.
Claim 7
Dependent Claim
52 words
A process for producing a finely divided aluminoxane as claimed in any one of the preceding claims which comprises contacting a solution of an aluminoxane represented by formula [I] or [II] as defined in claim 1 with an aluminoxane-insoluble or -sparingly soluble solvent to precipitate the finely divided solid aluminoxane in suspension.
Claim 8
Dependent Claim
17 words
A process according to claim 7 wherein an aliphatic or alicyclic hydrocarbon is used as said solvent.
Claim 9
Dependent Claim
33 words
A process according to claim 7 or 8 wherein said 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 10
Dependent Claim
45 words
A process for producing a finely divided aluminoxane as claimed in any one of claims 1 to 6 which comprises spray drying a solution of an aluminoxane represented by formula [I] or [II] as defined in claim 1 to form the finely divided solid aluminoxane.
Claim 11
Dependent Claim
54 words
A process according to claim 10 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 12
Dependent Claim
25 words
Use of a finely divided aluminoxane as claimed in any one of claims 1 to 6 as a catalyst component in the polymerization of olefins.
References Cited (Backward Citations)
No citation records indexed.
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