Patent US3896094A successfully refreshed from Google Patents.
US3896094A
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Preparation of alpha-olefin copolymers with vanadium phosphorodithioate catalyst
Assignee: Uniroyal Chemical Co Inc
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Filing: 1974-03-25
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Granted: 1975-07-22
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Expires: 1994-03-25
Abstract
Abstract Vandium phosphorodithioates represented by the formula: where R is an alkyl group with 1-10 carbon atoms are effective catalysts in the preparation of copolymers of alpha-olefins, e.g., ethylene/propylene rubber (EPR), and the terpolymers of the alpha-olefins with the nonconjugated dienes, e.g., ethylene/propylene/diene terpolymers (EPDM rubber), when an alkyl aluminum is used as a cocatalyst. These catalyst systems are very efficient and can be modified with a zinc compound to give liquid elastomers.
Inventors
- 👤 Harry D Visser
- 👤 Walter Nudenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:35
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/16
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
49 words
A METHOD OF COPOLYMERIZING ETHYLENE AND AN ALPHA-OLEFIN WITH OR WITHOUT A COPOLYMERIZABLE NONCONJUGATED DIENE TO FORM A COPOLYMER OF THE SAID MONOMERS COMPRISING CONTACTING THE SAID MONOMERS IN AN INERT ORGANIC SOLVENT WITH A CATALYST WHICH IS A VANADIUM PHOSPHORODITHIOATE OF ONE OF THE FORMULAS (1) OR (2)
Claim 2
Independent Claim
49 words
A METHOD OF COPOLYMERIZING ETHYLENE AND AN ALPHA-OLEFIN WITH OR WITHOUT A COPOLYMERIZABLE NONCONJUGATED DIENE TO FORM A COPOLYMER OF THE SAID MONOMERS COMPRISING CONTACTING THE SAID MONOMERS IN AN INERT ORGANIC SOLVENT WITH A CATALYST WHICH IS A VANADIUM PHOSPHORODITHIOATE OF ONE OF THE FORMULAS (1) OR (2)
Claim 3
Dependent Claim
16 words
A method as in claim 1 in which the said catalyst has the said formula (1).
Claim 4
Dependent Claim
16 words
A method as in claim 1 in which the said catalyst has the said formula (2).
Claim 5
Dependent Claim
17 words
A method as in claim 1 in which R and R'' have 1 to 5 carbon atoms.
Claim 6
Dependent Claim
13 words
A method as in claim 1 in which R and R'' are n-amyl.
Claim 7
Dependent Claim
18 words
A method as in claim 1 in which the said alkyl aluminum halide is an alkyl aluminum chloride.
Claim 8
Dependent Claim
18 words
A method as in claim 6 in which the said alkyl aluminum chloride is an alkyl aluminum sesquichloride.
Claim 9
Dependent Claim
17 words
A method as in claim 7 in which the said alkyl aluminum sesquichloride is ethyl aluminum sesquichloride.
Claim 10
Dependent Claim
13 words
A method as in claim 1 in which the said alpha-olefin is propylene.
Claim 11
Dependent Claim
14 words
A method as in claim 1 in which a copolymerizable non-conjugated diene is present.
Claim 12
Dependent Claim
14 words
A method as in claim 10 in which the said non-conjugated diene is 5-ethylidene-2-norbornene.
Claim 13
Dependent Claim
14 words
A method as in claim 10 in which the said non-conjugated diene is dicylopentadiene.
Claim 14
Dependent Claim
24 words
A method as in claim 1 in which the said monomers are ethylene and propylene and a binary copolymer of said monomers is formed.
Claim 15
Dependent Claim
16 words
A method as in claim 1 in which the said catalyst in vanadium (III) tris-(O,O-di-n-amyl phosphorodithioate).
Claim 16
Dependent Claim
15 words
A method as in claim 1 in which the said catalyst is vanadyl bis-(O,O-di-n-amyl phosphorodithioate).
Claim 17
Dependent Claim
40 words
A method as in claim 1 in which a zinc compound soluble in the polymerization mixture is also present, whereby thE molecular weight of the resulting copolymer is regulated so that the resulting copolymer is a liquid at ambient temperature.
Claim 18
Dependent Claim
15 words
A method as in claim 16 in which the said zinc compound is zinc stearate.
Claim 19
Dependent Claim
31 words
A method as in claim 1 in which the said alpha-olefin is propylene, R and R'' have 1 to 5 carbon atoms, and the said cocatalyst is an alkyl aluminum sesquichloride.
Claim 20
Dependent Claim
24 words
A method as in claim 18 in which a copolymerizable non-conjugated diene is present and the said alkyl aluminum sesquichloride is ethyl aluminum sesquichloride.
Claim 21
Dependent Claim
14 words
A method as claim 19 in which the said copolymerizable non-conjugated diene is 5-ethylidene-2-norbornene.
Claim 22
Dependent Claim
16 words
A method as in claim 20 in which the said catalyst is vanadium (III) tris-(O,O-di-n-amyl phosphorodithioate).
Claim 23
Dependent Claim
40 words
A method as in claim 21 in which a zinc compound soluble in the polymerization mixture is also present, whereby the molecular weight of the resulting copolymer is regulated so that the resulting copolymer is a liquid at ambient temperature.
Claim 24
Dependent Claim
15 words
A method as in claim 22 in which the said zinc compound is zinc stearate.
Claim 25
Dependent Claim
15 words
A method as in claim 20 in which the said catalyst is vanadyl bis-(O,O-di-n-amyl phosphorodithioate).
Claim 26
Dependent Claim
40 words
A method as in claim 24 in which a zinc compound soluble in the polymerization mixture is also present, whereby the molecular weight of the resulting copolymer is regulated so that the resulting copolymer is a liquid at ambient temperature.
Claim 27
Dependent Claim
15 words
A method as in claim 25 in which the said zinc compound is zinc stearate.
Claim 28
Dependent Claim
15 words
A method as in claim 19 in which the said copolymerizable non-conjugated diene is dicyclopentadiene.
Claim 29
Dependent Claim
16 words
A method as in claim 27 in which the said catalyst is vanadium (III) tris-(O,O-di-n-amyl phosphorodithioate).
Claim 30
Dependent Claim
40 words
A method as in claim 28 in which a zinc compound soluble in the polymerization mixture is also present, whereby the molecular weight of the resulting copolymer is regulated so that the resulting copolymer is a liquid at ambient temperature.
Claim 31
Dependent Claim
15 words
A method as in claim 29 in which the said zinc compound is zinc stearate.
Claim 32
Dependent Claim
15 words
A method as in claim 27 in which the said catalyst is vanadyl bis-(O,O-di-n-amyl phosphorodithioate).
Claim 33
Dependent Claim
40 words
A method as in claim 31 in which a zinc compound soluble in the polymerization mixture is also present, whereby the molecular weight of the resulting copolymer is regulated so that the resulting copolymer is a liquid at ambient temperature.
Claim 34
Dependent Claim
15 words
A method as in claim 32 in which the said zinc compound is zinc stearate.
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) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |