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US4068057A
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US
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Aminated polymeric additives for fuel and lubricants
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1975-03-05
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Granted: 1978-01-10
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Expires: 1995-03-05
Abstract
Abstract Hydrocarbon polymers, preferably polymers having a degree of crystallinity of less than about 25 weight percent and comprising about 2 to 98 weight percent ethylene, and one or more C 3 to C 28 alpha-olefins, are mechanically grafted under an inert atmosphere and at elevated temperatures, in the presence of an amine compound, to form an amino-grafted polymer. The resulting aminated polymers are useful as sludge dispersants for fuels and lubricants. When the aminated polymers have a higher molecular weight, they are also useful as viscosity-index improvers with dispersant and/or pour point depressant activity.
Inventors
- 👤 Lawrence J. Engel
- 👤 John B. Gardiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:35
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/221; C10M; C10M143/00; C10M143/02; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/32; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/109; C10M2209/11; C10M2209/111; C10M2209/112; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/044; C10M2215/22; C10M2215/221; C10M2215/223; C10M2215/224; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/30; C10M2217/00; C10M2217/02; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/08; C10M2219/082; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10N; C10N2040/00; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046; C10N2040/06; C10N2040/08; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
155 words
In a process for aminating an olefin copolymer to form an oil-soluble aminated copolymer useful as a sludge dispersing-viscosity index improving, additive for lubricating oil, the improvement which comprises carrying out said amination without substantial molecular weight degradation of said copolymer by mechanically working a mixture consisting essentially of amine and said copolymer, at a temperature of about 130° to 260° C., under an inert gas atmosphere, for about 0.5 to 12 hours to thereby incorporate about 0.01 to 0.5 weight percent nitrogen into said copolymer, wherein said copolymer is a copolymer having a number average molecular weight in the range of about 10,000 to 500,000 and consists essentially of ethylene in an amount in the range of 2 to 98 wt. %, and one or more C 3 to C 28 alpha-olefins, and wherein said amine is a saturated, aliphatic hydrocarbyl polyamine of 3 to 20 carbon atoms and 2 to 6 nitrogen atoms.
Claim 2
Dependent Claim
155 words
In a process for aminating an olefin copolymer to form an oil-soluble aminated copolymer useful as a sludge dispersing-viscosity index improving, additive for lubricating oil, the improvement which comprises carrying out said amination without substantial molecular weight degradation of said copolymer by mechanically working a mixture consisting essentially of amine and said copolymer, at a temperature of about 130° to 260° C., under an inert gas atmosphere, for about 0.5 to 12 hours to thereby incorporate about 0.01 to 0.5 weight percent nitrogen into said copolymer, wherein said copolymer is a copolymer having a number average molecular weight in the range of about 10,000 to 500,000 and consists essentially of ethylene in an amount in the range of 2 to 98 wt. %, and one or more C 3 to C 28 alpha-olefins, and wherein said amine is a saturated, aliphatic hydrocarbyl polyamine of 3 to 20 carbon atoms and 2 to 6 nitrogen atoms.
Claim 3
Dependent Claim
25 words
A process according to claim 1, wherein said amine has the general formulae: ##STR3##wherein s is 2 to 6 and t is 0 to 10.
Claim 4
Dependent Claim
35 words
A process according to claim 2, wherein said temperature is about 150° to 200° C., said time is about 4 to 5 hours, said amine is tetraethylene pentamine, and said copolymer is an ethylene-propylene copolymer.
Claim 5
Dependent Claim
20 words
A process according to claim 1, wherein said polymer consists essentially of ethylene and propylene and said polyamine is polyethyleneamine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |