US4250104A
Expired / Lapsed
US
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Catalyst-forming components for preparing catalysts useful in the polymerization of olefins
Assignee: Montedison SpA
•
Filing: 1978-06-19
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Granted: 1981-02-10
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Expires: 1998-06-19
Abstract
Abstract There are disclosed new starting components for use in preparing catalysts for the polymerization and copolymerization of olefins. The new starting components are compounds having the general formulae R 2 AlOR" and/or RAl(OR") 2 , in which R represents alkyl radicals containing 1 to 12 carbon atoms and R" has one of the following structures: ##STR1##
Inventors
- 👤 Umberto Giannini
- 👤 Enrico Albizzati
- 👤 Sandro Parodi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:07
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/906
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
98 words
As catalyst-forming components for preparing catalysts for the polymerization of olefins, compounds having a structure defined by one of the following formulas: R 2 AlOR" and RAl(OR") 2 in which R represents alkyl radicals containing from 1 to 12 carbon atoms inclusive, and R" corresponds to one of the following structures (I) or (II): ##STR9## wherein in positions 2 and 6 in structure (I) and position 2, optionally also position 8, in structure (II) there are present radicals at least one of which exerts a steric hindrance higher than that of the group --C 2 H 5 .
Claim 2
Dependent Claim
98 words
As catalyst-forming components for preparing catalysts for the polymerization of olefins, compounds having a structure defined by one of the following formulas: R 2 AlOR" and RAl(OR") 2 in which R represents alkyl radicals containing from 1 to 12 carbon atoms inclusive, and R" corresponds to one of the following structures (I) or (II): ##STR9## wherein in positions 2 and 6 in structure (I) and position 2, optionally also position 8, in structure (II) there are present radicals at least one of which exerts a steric hindrance higher than that of the group --C 2 H 5 .
Claim 3
Dependent Claim
68 words
As catalyst-forming components according to claim 1, in which if only one of the radicals in positions 2 and 6 in structure (I), or in positions 2 and 8 in structure (II) is a radical which exerts a steric hindrance higher than that of the group --C 2 H 5 , the other radical in said positions is selected from the group consisting of alkyl and aryl radicals.
Claim 4
Dependent Claim
43 words
As catalyst-forming components according to claim 2, in which the radical different from the radical which exerts a steric hindrance higher than that of the group --C 2 H 5 is selected from the group consisting of methyl, ethyl, propyl and phenyl radicals.
Claim 5
Dependent Claim
34 words
As catalyst-forming components according to claim 1, characterized in that the radicals having a steric hindrance higher than that of group C 2 H 5 are alkyl radicals containing at least 3 carbon atoms.
Claim 6
Dependent Claim
30 words
As catalyst-forming components according to claim 4, in which the radicals which exert a steric hindrance higher than that of the group --C 2 H 5 are branched alkyl radicals.
Claim 7
Dependent Claim
53 words
As catalyst-forming components according to claim 4, further characterized in that the radicals which exert a steric hindrance higher than that of the group --C 2 H 5 are selected from the group consisting of i--C 3 H 7 , t--C 4 H 9 , i--C 4 H 9 , isoamyl and neopentyl.
Claim 8
Dependent Claim
45 words
Catalyst-forming components according to claim 1, further characterized in that the substituents in positions 3, 4 and 5 in structure (I), and in positions 3, 4, 5, 6 and 7 in structure (II) are atoms or groups which are not reactive with alkyl aluminum compounds.
Claim 9
Dependent Claim
30 words
Catalyst-forming components according to claim 7, further characterized in that said substituents which are not reactive with alkyl aluminum compounds are halogen atoms or alkyl, aryl, alkaryl or aralkyl groups.
Claim 10
Dependent Claim
36 words
Catalyst-forming components according to claim 1, characterized in that the substituent at position 4 in structure (I) has the formula: ##STR10## in which formula R is an alkyl radical containing from 1 to 12 carbon atoms.
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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) | 1984-02-10 | 1984-08-11 | 1985-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $7700.00 | Window Closed / Lapsed |