US5276115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mono-1-olefin polymerization in the presence of hydrogen and a cyclopentadienyl compound
Assignee: Phillips Petroleum Co
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Filing: 1992-12-14
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Granted: 1994-01-04
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Expires: 2012-12-14
Abstract
Abstract A process for the polymerization of olefins in the presence of hydrogen comprising contacting the olefin, a cyclopentadienyl compound and a catalyst comprising a transition metal compound at polymerization conditions.
Inventors
- 👤 Robert W. Bohmer
- 👤 M. Bruce Welch
- 👤 Kenneth L. Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:24
CPC Classifications
C; C08; C08F; C08F297/00; C08F297/06; C08F297/08; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/903; Y10S526/905; Y10S526/943
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
118 words
A process comprising contacting at least one mono-1-olefin, a catalyst, and hydrogen in a first step to produce a first polymer; wherein said catalyst comprises a transition metal compound and wherein the transition metal of said transition metal compound is selected from the group consisting of titanium, zirconium, and vanadium; and contacting said at least one mono-1-olefin, said catalyst, and a cyclopentadienyl compound in a second step to produce a second polymer; wherein said cyclopentadienyl compound is selected from the group consisting of cyclopentadiene, dicyclopentadiene and cyclopentadienyl compounds substituted with hydrocarbyl or hydrocarbyl silyl radicals having from 1 to 10 carbon atoms; and wherein said contacting in said first step and said second step is under polymerization conditions.
Claim 2
Dependent Claim
118 words
A process comprising contacting at least one mono-1-olefin, a catalyst, and hydrogen in a first step to produce a first polymer; wherein said catalyst comprises a transition metal compound and wherein the transition metal of said transition metal compound is selected from the group consisting of titanium, zirconium, and vanadium; and contacting said at least one mono-1-olefin, said catalyst, and a cyclopentadienyl compound in a second step to produce a second polymer; wherein said cyclopentadienyl compound is selected from the group consisting of cyclopentadiene, dicyclopentadiene and cyclopentadienyl compounds substituted with hydrocarbyl or hydrocarbyl silyl radicals having from 1 to 10 carbon atoms; and wherein said contacting in said first step and said second step is under polymerization conditions.
Claim 3
Dependent Claim
18 words
A process according to claim 1 further comprising contacting at least one mono-1-olefin comonomer in said second step.
Claim 4
Dependent Claim
11 words
A process according to claim 2 wherein said comonomer is 1-hexene.
Claim 5
Dependent Claim
33 words
A process according to claim 1 wherein said first step is conducted in a first reactor and said second step is conducted in a second reactor connected in series with said first reactor.
Claim 6
Dependent Claim
12 words
A process according to claim 1 wherein said cyclopentadienyl compound is cyclopentadiene.
Claim 7
Dependent Claim
33 words
A process according to claim 1 wherein said cyclopentadienyl compound is present in an amount in the range of from about 0.01 moles to about 100 moles cyclopentadienyl compound per mole of catalyst.
Claim 8
Dependent Claim
14 words
A process according to claim 1 wherein said at least one mono-1-olefin is ethylene.
Claim 9
Dependent Claim
35 words
A process according to claim 1 wherein said polymerization conditions include a temperature in the range of about 20° C. to about 200° C. and a pressure of about 0.5 MPa to about 5.0 MPa.
Claim 10
Dependent Claim
43 words
A polymerization process comprising: (1) contacting ethylene monomer, a catalyst comprising a titanium compound, and hydrogen under polymerization conditions to produce a first ethylene polymer; and (2) contacting ethylene monomer, said catalyst, and cyclopentadiene under polymerization conditions to produce a second ethylene polymer.
Claim 11
Dependent Claim
43 words
A polymerization process comprising: (1) contacting ethylene monomer, a catalyst comprising a titanium compound, and hydrogen under polymerization conditions to produce a first ethylene polymer; and (2) contacting ethylene monomer, said catalyst, and cyclopentadiene under polymerization conditions to produce a second ethylene polymer.
Claim 12
Dependent Claim
32 words
A process according to claim 9 wherein said cyclopentadiene is present in said second step in an amount within the range of from 0.1 moles to 50 moles per mole of catalyst.
Claim 13
Dependent Claim
14 words
A process according to claim 9 further comprising contacting 1-hexene in said second step.
Claim 14
Dependent Claim
28 words
A process according to claim 9 wherein said polymerization conditions in step (1) and step (2) include a temperature in the range of 50° C. to 150° C.
Claim 15
Dependent Claim
31 words
A process according to claim 9 wherein step (1) is conducted in a first reactor and step (2) is conducted in a second reactor connected in series with said first reactor.
References Cited (Backward Citations)
US3294766A
Cited
US4015059A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 7.5 Years (Year 8) | 2001-01-03 | 2001-07-05 | 2002-01-04 | $3760.00 | Window Closed / Lapsed |
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