US3764588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curable amorphous olefinic terpolymers obtained from alpha-olefins and polyenes containing two conjugated double bonds and process for obtaining same
Assignee: SnamProgetti SpA
•
Filing: 1971-01-22
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Granted: 1973-10-09
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Expires: 1991-01-22
Abstract
Abstract New, readily curable, amorphous terpolymers are disclosed which are prepared from ethylene, propylene and a polyene hydrocarbon which contains two double bonds and is represented by the formula:
Inventors
- 👤 S Arrighetti
- 👤 S Cesca
- 👤 A Roggero
- 👤 E Vajna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:19
CPC Classifications
C; C08; C08F; C08F210/00; C08F10/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
20 words
Terpolymers as claimed in claim 1 characterized in that the termonomer consists of a mixture of the aforesaid polyene compounds.
Claim 2
Dependent Claim
21 words
Terpolymers as claimed in claim 1 characterized in that the alpha-olefin is preferably selected from propylene, butenes, pentenes, methylpentenes and hexenes.
Claim 3
Dependent Claim
12 words
Terpolymers as claimed in claim 1 in that the alpha-olefin is propylene.
Claim 4
Dependent Claim
26 words
Curable amorphous olefinic terpolymers as claimed in claim 1 characterized in that the polyene amount in the elastomer ranges from 1 percent to 25 percent b.w.
Claim 5
Dependent Claim
24 words
Terpolymers as claimed in claim 1 characterized in that the ratio between ethylene and propylene is from 1.5 : 1 to 1 : 3.
Claim 6
Dependent Claim
11 words
Elastomers obtained by curing the terpolymers as claimed in claim 1.
Claim 7
Dependent Claim
108 words
A process for preparing a terpolymer as claimed in claim 1 which comprises polymerizing a mixture of the two different alpha-olefins and the polyene in the presence of a catalyst system comprising: A. A compound of vanadium; B. A reducing aluminum compound having the formula: AlYX1X2 . n1Z wherein Y is selected from hydrogen or hydrocarbon radicals having 1 to 10 carbon atoms; each of X1 and X2, which may be the same or different, is a hydrogen atom, a hydrocarbon radical having 1 to 10 carbon atoms, a halogen atom or a secondary amine radical; Z is a Lewis base and n1 is 0, 1 or 2.
Claim 8
Dependent Claim
17 words
A process as claimed in claim 8 characterized in that the reducing aluminum compound is a polyiminoalane.
Claim 9
Dependent Claim
34 words
A process as claimed in claim 8 characterized in that the polymerization reaction is carried out at a tEmperature of from -60 to +100* C and a pressure of from 1 to 80 atmospheres.
Claim 10
Dependent Claim
24 words
A process as claimed in claim 8 characterized in that the polymerization reaction is carried out in the presence of an inert hydrocarbon solvent.
Claim 11
Dependent Claim
15 words
A process as claimed in claim 11 characterized in that the inert solvent is n-heptane.
Claim 12
Dependent Claim
27 words
A process as claimed in claim 8 characterized in that the polymerization reaction is carried out in the absence of solvents, the monomer being the reaction medium.
References Cited (Backward Citations)
US3453247A
Cited
US3527739A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |