US4567155A
Expired / Lapsed
US
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Olefin polymerization catalyst system producing polymer with low active chloride
Assignee: BP Corp North America Inc
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Filing: 1984-09-24
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Granted: 1986-01-28
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Expires: 2004-09-24
Abstract
Abstract A catalyst system especially suited for polymerizing alpha-olefins in the gas-phase to polymers containing essentially no active chloride comprises (A) a titanium-containing component supported on a hydrocarbon-insoluble magnesium-containing compound in combination with an electron donor compound and (B) a co-catalyst comprising (a) at least one trialkylaluminum compound (b) an aromatic acid ester and (c) an unhindered secondary amine, optionally reacted with a dialkylaluminum hydride, in substantial absence of compounds containing an Al-Cl bond.
Inventors
- 👤 Benjamin S. Tovrog
- 👤 Charles R. Hoppin
- 👤 Bryce V. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:48
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
91 words
A catalyst system suitable for gas-phase polymerization of alpha-olefins to polymers containing essentially no active chloride comprising: A. a titanium-containing component supported on a hydrocarbon-insoluble magnesium-containing compound in combination with an electron donor compound; and B. a co-catalyst comprising (a) at least one trialkyl aluminum compound, (b) an aromatic acid ester, and (c) an unhindered secondary amine, such secondary amine having no more than one methyl group on a carbon atom adjacent to a nitrogen atom, optionally reacted with a dialkylaluminum hydride, in substantial absence of compounds containing an Al--Cl bond.
Claim 2
Dependent Claim
91 words
A catalyst system suitable for gas-phase polymerization of alpha-olefins to polymers containing essentially no active chloride comprising: A. a titanium-containing component supported on a hydrocarbon-insoluble magnesium-containing compound in combination with an electron donor compound; and B. a co-catalyst comprising (a) at least one trialkyl aluminum compound, (b) an aromatic acid ester, and (c) an unhindered secondary amine, such secondary amine having no more than one methyl group on a carbon atom adjacent to a nitrogen atom, optionally reacted with a dialkylaluminum hydride, in substantial absence of compounds containing an Al--Cl bond.
Claim 3
Dependent Claim
36 words
The catalyst of claim 1 wherein the unhindered secondary amine contains alkyl groups having from two to about eight carbon atoms or is a cyclic aliphatic secondary amine containing from four to about ten carbon atoms.
Claim 4
Dependent Claim
18 words
The catalyst of claim 1 wherein the unhindered amine is piperidine, 2-methylpiperidine, pyrrolidine, homopiperidine, piperazine, dicyclohexylamine or di-n-propylamine.
Claim 5
Dependent Claim
15 words
The catalyst of claim 1 wherein the unhindered amine is piperidine, pyrrolidine, homopiperidine or piperazine.
Claim 6
Dependent Claim
11 words
The catalyst of claim 1 wherein the unhindered amine is piperidine.
Claim 7
Dependent Claim
16 words
The catalyst of claim 1 wherein the trialkyl aluminum is triethylaluminum, triisobutylaluminum or a combination thereof.
Claim 8
Dependent Claim
11 words
The catalyst of claim 1 wherein the trialkyl aluminum is triisobutylaluminum.
Claim 9
Dependent Claim
30 words
The catalyst of claim 1 wherein the unhindered secondary amine is complexed with a dialkylaluminum hydride in which the alkyl groups contain from about four to about six carbon atoms.
Claim 10
Dependent Claim
23 words
The catalyst of claim 1 wherein the aromatic acid ester contained in the cocatalyst is ethylbenzoate, ethyl anisate, methyl p-toluate or methyl p-anisate.
Claim 11
Dependent Claim
13 words
The catalyst of claim 9 wherein the aromatic acid ester is methyl p-toluate.
Claim 12
Dependent Claim
20 words
The catalyst of claim 1 wherein the titanium-containing component is formed by reacting a titanium tetrahalide with a magnesium alcoholate.
Claim 13
Dependent Claim
20 words
The catalyst of claim 1 wherein the titanium-containing componenet is formed by reacting a titanium tetrahalide with a magnesium halide.
Claim 14
Dependent Claim
16 words
The catalyst of claim 1 wherein the electron donor is at least one aromatic acid ester.
Claim 15
Dependent Claim
113 words
A catalyst system suitable for gas-phase polymerization of alpha-olefins to polymers containing essentially no active chloride comprising. A. a titanium-containing component supported on a hydrocarbon-insoluble magnesium-containing compound in combination with an aromatic acid ester; and B. a co-catalyst comprising (a) triethylaluminum, triisobutylaluminum or a combination thereof, (b) an aromatic acid ester selected from the group consisting of ethylbenzoate, ethylanisate, methyl p-anisate and methyl p-toluate, and (c) a cyclic unhindered secondary amine, such secondary amine having no more than one methyl group on a carbon atom adjacent to a nitrogen atom, containing from four to about 10 carbon atoms, optionally reacted with a dialkylaluminum hydride, in substantial absence of compounds containing an Al--Cl bond.
Claim 16
Dependent Claim
113 words
A catalyst system suitable for gas-phase polymerization of alpha-olefins to polymers containing essentially no active chloride comprising. A. a titanium-containing component supported on a hydrocarbon-insoluble magnesium-containing compound in combination with an aromatic acid ester; and B. a co-catalyst comprising (a) triethylaluminum, triisobutylaluminum or a combination thereof, (b) an aromatic acid ester selected from the group consisting of ethylbenzoate, ethylanisate, methyl p-anisate and methyl p-toluate, and (c) a cyclic unhindered secondary amine, such secondary amine having no more than one methyl group on a carbon atom adjacent to a nitrogen atom, containing from four to about 10 carbon atoms, optionally reacted with a dialkylaluminum hydride, in substantial absence of compounds containing an Al--Cl bond.
Claim 17
Dependent Claim
10 words
The catalyst of claim 14 wherein the trialkylaluminum is triisobutylaluminum.
Claim 18
Dependent Claim
13 words
The catalyst of claim 15 wherein the aromatic acid ester is methyl p-toluate.
Claim 19
Dependent Claim
12 words
The catalyst of claim 15 wherein the cyclic secondary amine is piperidine.
Claim 20
Dependent Claim
9 words
The catalyst of claim 16 wherein amine is piperidine.
Claim 21
Dependent Claim
20 words
The catalyst of claim 17 wherein the cyclic secondary amine is complexed with an approximately equivalent amount of diisobutylaluminum hydride.
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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) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |