US4055535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing stabilized olefin terpolymers and stabilized olefin terpolymers produced according to said process
Assignee: SnamProgetti SpA
•
Filing: 1975-04-11
•
Granted: 1977-10-25
•
Expires: 1995-04-11
Abstract
Abstract A method is described whereby olefin terpolymers, consisting of ethylene, an alpha olefin and a polyene having in the molecule, in addition to the double bond participating in the formation of the macromolecule, at least one conjugated double bond system, are stabilized against oxidative aging without destroying their characteristic high vulcanization rate by reacting them with a dienophilic agent represented by one of the following formulae: ##STR1##wherein R and R 6 may be an alkyl, alkenyl, cycloalkyl, aryl or aralkyl radical having up to 8 carbon atoms, R 1 , R 2 , R 3 , R 4 and R 5 may be hydrogen or alkyl, aryl, cycloalkyl or aralkyl radicals having up to 8 carbon atoms, the R 1 -R 2 and R -R pairs may be divalent radicals forming condensed rings.
Inventors
- 👤 Sergio Arrighetti
- 👤 Sebastiano Cesca
- 👤 Giuseppe Ghetti
- 👤 Eugenio Vajna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:58
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/34
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
119 words
A process for preparing an olefin terpolymer which is stabilized against oxidative aging, which comprises reacting in a hydrocarbon solvent and at a temperature between 0° and 150° C. a. a terpolymer of ethylene, another alpha olefin, and a polyene selected from the group consisting of dehydro-iso-dicyclopentadiene and 2-(2',4' -dimethyl-penta 1',3' dienyl-)-norborn-5-ene, having in addition to a double bond for participating in the terpolymer formation, conjugated double bonds in the cyclopentadienyl substituent, with b. a dienophilic agent of the general formula: ##STR14## wherein R 5 can be hydrogen or alkyl, aryl, cycloalkyl or arylalkyl radicals having up to 8 carbon atoms and R 6 can be alkyl, alkenyl, cycloalkyl, aryl, or arylalkyl radical having up to 8 carbon atoms.
Claim 2
Dependent Claim
119 words
A process for preparing an olefin terpolymer which is stabilized against oxidative aging, which comprises reacting in a hydrocarbon solvent and at a temperature between 0° and 150° C. a. a terpolymer of ethylene, another alpha olefin, and a polyene selected from the group consisting of dehydro-iso-dicyclopentadiene and 2-(2',4' -dimethyl-penta 1',3' dienyl-)-norborn-5-ene, having in addition to a double bond for participating in the terpolymer formation, conjugated double bonds in the cyclopentadienyl substituent, with b. a dienophilic agent of the general formula: ##STR14## wherein R 5 can be hydrogen or alkyl, aryl, cycloalkyl or arylalkyl radicals having up to 8 carbon atoms and R 6 can be alkyl, alkenyl, cycloalkyl, aryl, or arylalkyl radical having up to 8 carbon atoms.
Claim 3
Dependent Claim
17 words
Terpolymers stabilized against oxidative ageing consisting of the reaction product according to the process of claim 1.
Claim 4
Dependent Claim
12 words
The process according to claim 1 wherein the hydrocarbon solvent is toluene.
Claim 5
Dependent Claim
19 words
The process according to claim 1 wherein the reaction occurs at a temperature in the range from 15°-90° C.
Claim 6
Dependent Claim
76 words
The process of claim 1 including recovering the stabilized olefin terpolymer reaction product from the hydrocarbon solvent by the steps comprising i. contacting the product and solvent mixture with an excess of methanol to coagulate the polymer and separate the polymer; ii. redissolving the polymer in a solvent therefor; iii. contacting the product and a solvent mixture again in an excess of methanol to coagulate the polymer and separate the polymer; and iv. drying the polymer.
Claim 7
Dependent Claim
12 words
The process of claim 1 wherein the polyene is 2-(2',4'-dimethyl-penta 1',3' dienyl-)-norborn-5-ene.
Claim 8
Dependent Claim
13 words
The process according to claim 1 wherein said dienophilic agent is methyl-vinyl ketone.
Claim 9
Dependent Claim
10 words
The process of claim 1 wherein the polyene is dehydro-iso-dicyclopentadiene.
Claim 10
Dependent Claim
12 words
The process of claim 6 wherein said dienophilic agent is methyl-vinyl ketone.
Claim 11
Dependent Claim
12 words
The process of claim 8 wherein said dienophilic agent is methyl-vinyl ketone.
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) | 1980-10-24 | 1981-04-25 | 1981-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-24 | 1985-04-25 | 1985-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-24 | 1989-04-25 | 1989-10-25 | $7700.00 | Window Closed / Lapsed |