US4148756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel trialkyl aluminum cocatalyst
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1978-03-29
•
Granted: 1979-04-10
•
Expires: 1998-03-29
Abstract
Abstract A new improved catalyst system for polymeric polymerizations, includes at least one metal alkyl compound having the formula RnMR'3-n in combination with a Group IVB-VIII transition metal compound on a support and at least one Lewis base wherein R is selected from the group consisting of C3 to C20 secondary or tertiary alkyl, cycloalkyl, alkenyl or aralkyl groups, or <IMAGE> wherein R'' is a methyl or ethyl group and R''' is a C1 to C10 alkyl group; R' is selected from the group consisting of C1 to C20 primary alkyl, alkenyl or aralkyl groups, or a hydride, M is selected from the group consisting of aluminum, gallium, or indium; and n = 1-3. The improved catalyst system provides polymers having increased isotactic stereoregularity as well as lower catalyst residue.
Inventors
- 👤 Arthur W. Langer, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:50
CPC Classifications
C; C08; C08F; C08F10/00; C08F4/00; C08F4/02; C08F4/022; C08F110/00; C08F110/04; C08F110/06
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
121 words
An improved catalyst composition adaptable for use in polymeric polymerization which comprises a mixture of: (a) Group IVB to VIII transition metal halide on a support; and (b) an alkyl metal compound having the formula: ##STR10## wherein R' is selected from the group consisting of C 1 to C 20 primary alkyl, alkenyl and aralkyl groups and hydride; R" is a methyl or ethyl group and R''' is a C 1 to C 10 alkyl group, M is selected from the group consisting of aluminum, gallium and indium and n=1 or 2, wherein said composition includes at least one Lewis base, with the proviso that said Lewis base does not cause excessive cleavage of metal-carbon bonds or loss of active sites.
Claim 2
Dependent Claim
121 words
An improved catalyst composition adaptable for use in polymeric polymerization which comprises a mixture of: (a) Group IVB to VIII transition metal halide on a support; and (b) an alkyl metal compound having the formula: ##STR10## wherein R' is selected from the group consisting of C 1 to C 20 primary alkyl, alkenyl and aralkyl groups and hydride; R" is a methyl or ethyl group and R''' is a C 1 to C 10 alkyl group, M is selected from the group consisting of aluminum, gallium and indium and n=1 or 2, wherein said composition includes at least one Lewis base, with the proviso that said Lewis base does not cause excessive cleavage of metal-carbon bonds or loss of active sites.
Claim 3
Dependent Claim
27 words
The composition of claim 1, wherein the halide group of said transition metal halide is selected from the group consisting of chloride and bromide and mixtures thereof.
Claim 4
Dependent Claim
27 words
The composition of claim 2, wherein the metal of said transition metal halide is selected from the group consisting of trivalent titanium, trivalent vanadium and tetravalent titanium.
Claim 5
Dependent Claim
14 words
The composition of claim 1 wherein said transition metal compound is TiCl 4 .
Claim 6
Dependent Claim
12 words
The composition of claim 4, wherein said support contains MgCl 2 .
Claim 7
Dependent Claim
14 words
The composition of claim 1, wherein said transition metal compound is TiCl 3 .
Claim 8
Dependent Claim
29 words
The composition of claim 1, wherein said Lewis base is selected from the group of amines, esters, phosphines, phosphine oxides, phosphates, amides, ketones dimethyl sulfoxide, heterocyclics, epoxides and ethers.
Claim 9
Dependent Claim
30 words
The composition of claim 5, wherein said Lewis base is selected from the group consisting of amines, esters, phosphines, phosphine oxides, phosphates, amides, ketones dimethyl sulfoxide, heterocyclics, epoxides and ethers.
Claim 10
Dependent Claim
14 words
The composition of claim 1, wherein said Lewis base is a carboxylic acid ester.
Claim 11
Dependent Claim
9 words
The composition of claim 1, wherein n equals 1.
Claim 12
Dependent Claim
9 words
The composition of claim 1, wherein n equals 2.
Claim 13
Dependent Claim
26 words
The composition according to claim 1, wherein a molar ratio of said alkyl metal compound to said transition metal compound is about 0.5:1 to about 50:1.
Claim 14
Dependent Claim
10 words
The composition of claim 4, further including TiCl 3 .
Claim 15
Dependent Claim
10 words
The composition of claim 2, wherein n is 1. ##STR11##
Claim 16
Dependent Claim
60 words
The composition of claim 14, wherein said alkyl metal compound is formed from the reaction product of R' 2 MX and RMgX', wherein X is selected from the group consisting of chloride, bromide, and a monovalent anion which cannot initiate polymerization of olefinic monomers and X' is an anion which cannot initiate polymerization of olefinic monomers and R is ##STR12##
Claim 17
Dependent Claim
17 words
The composition of claim 15, wherein said transition metal compound is TiCl 4 containing MgCl 2 .
Claim 18
Dependent Claim
9 words
The composition of claim 2, wherein n is 2.
Claim 19
Dependent Claim
49 words
The composition of claim 17, wherein said alkyl metal compound is formed from the reaction product of R 2 Mg and R'MX 2 wherein X is selected from the group consisting of chloride, bromide, or a monovalent anion which cannot initiate polymerization of olefinic monomers and R is ##STR13##
Claim 20
Dependent Claim
17 words
The composition of claim 18, wherein said transition metal compound is TiCl 4 containing MgCl 2 .
Claim 21
Dependent Claim
35 words
An improved catalyst composition according to claim 1 further including a conventional alkyl metal cocatalyst mixed with said ##STR14## wherein said conventional alkyl metal cocatalyst can be a trialkyl metal or a dialkyl metal compound.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-09 | 1982-10-09 | 1983-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-09 | 1986-10-09 | 1987-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-09 | 1990-10-09 | 1991-04-10 | $7700.00 | Window Closed / Lapsed |