US4169063A
Expired / Lapsed
US
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EPR dispersant VI improver
Assignee: Shell USA Inc
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Filing: 1977-03-11
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Granted: 1979-09-25
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Expires: 1997-03-11
Abstract
Abstract Lubricating oil additives having both dispersant and viscosity-index improving properties are prepared by reacting an ethylene-propylene copolymer with chlorine and/or an alpha-beta unsaturated dicarboxylic acid or derivative, and then reacting the resulting intermediate with certain amines.
Inventors
- 👤 Thomas E. Kiovsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:07
CPC Classifications
C; C10; C10M; C10M143/00; C10M143/02; C08; C08F; C08F8/00; C08F8/14; C08F8/30; C08F8/32; C08F2810/00; C08F2810/20; C10M2203/00; C10M2203/10; C10M2205/00; C10M2205/02; C10M2205/022; C10M2205/026; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2207/023; C10M2207/024; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/287; C10M2207/288; C10M2207/289; C10M2207/32; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/086; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/12; C10M2211/00; C10M2211/02; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/08; C10M2215/082; C10M2215/12; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/28; C10M2215/30; C10M2217/00; C10M2217/02; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/046; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/045; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2010/00; C10N2010/04; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
107 words
The oil-soluble product prepared by the process comprising: (a) reacting a high molecular weight amorphous copolymer of essentially ethylene and propylene, said copolymer having a number average molecular weight of between about 70,000 and about 300,000, with an alpha-beta unsaturated dicarboxylic acid, anhydride or ester in the absence of oxygen and chlorine at a temperature of between about 150° C. and about 250° C. for between about 6 hours and about 24 hours; and (b) reacting the product of step (a) with a C 1 to C 18 amine containing 1 to 8 nitrogen atoms at a temperature of between about 150° C. and about 250° C.
Claim 2
Dependent Claim
107 words
The oil-soluble product prepared by the process comprising: (a) reacting a high molecular weight amorphous copolymer of essentially ethylene and propylene, said copolymer having a number average molecular weight of between about 70,000 and about 300,000, with an alpha-beta unsaturated dicarboxylic acid, anhydride or ester in the absence of oxygen and chlorine at a temperature of between about 150° C. and about 250° C. for between about 6 hours and about 24 hours; and (b) reacting the product of step (a) with a C 1 to C 18 amine containing 1 to 8 nitrogen atoms at a temperature of between about 150° C. and about 250° C.
Claim 3
Dependent Claim
53 words
The composition of claim 1 wherein said amorphous copolymer comprises essentially ethylene, from 30 to about 65 mole percent propylene, and less than about 10 mole percent of an alpha-olefin of the general formula RCH═CH 2 , where R is an aliphatic or cycloaliphatic radical of from 2 to about 20 carbon atoms.
Claim 4
Dependent Claim
17 words
The composition of claim 1 wherein said alpha-beta unsaturated dicarboxylic acid, anhydride or ester is maleic anhydride.
Claim 5
Dependent Claim
40 words
The composition of claim 3 wherein said amine has the formula: ##STR1## where n is 2 to 4 and m is 0 to 6, and the molar ratio of amine to maleic anhydride is between about 0.5:1 and about 2:1.
Claim 6
Dependent Claim
11 words
The composition of claim 4 wherein the amine is tetraethylene pentamine.
Claim 7
Dependent Claim
55 words
The composition of claim 1 wherein said amorphous copolymer and said alpha-beta unsaturated dicarboxylic acid, anhydride or ester are reacted in the presence of a solvent, and wherein the amount of said alpha-beta unsaturated dicarboxylic compound is between about 5 weight percent and about 25 weight percent, based on the weight of the amorphous copolymer.
Claim 8
Dependent Claim
159 words
The oil-soluble product prepared by the process comprising: (f) reacting a high molecular weight amorphous copolymer of essentially ethylene and propylene, said copolymer having a number average molecular weight of between about 300,000 and about 1,000,000, with an alpha-beta unsaturated dicarboxylic acid, anhydride or ester in the absence of oxygen and chlorine at a temperature of between about 150° C. and about 250° C. for between about 150° C. and about 250° C. for between about 6 hours and about 24 hours; (g) reacting the product of step (f) with a C 1 to C 18 amine containing 1 to 8 nitrogen atoms at a temperature of between about 150° C. and about 250° C.; and (h) subjecting the product of step (g) to a repeated shearing action so as to reduce the molecular weight of the oil-soluble product to between about 80,000 and about 300,000, and the ratio of M w /M n to between 1 and 4.
Claim 9
Dependent Claim
159 words
The oil-soluble product prepared by the process comprising: (f) reacting a high molecular weight amorphous copolymer of essentially ethylene and propylene, said copolymer having a number average molecular weight of between about 300,000 and about 1,000,000, with an alpha-beta unsaturated dicarboxylic acid, anhydride or ester in the absence of oxygen and chlorine at a temperature of between about 150° C. and about 250° C. for between about 150° C. and about 250° C. for between about 6 hours and about 24 hours; (g) reacting the product of step (f) with a C 1 to C 18 amine containing 1 to 8 nitrogen atoms at a temperature of between about 150° C. and about 250° C.; and (h) subjecting the product of step (g) to a repeated shearing action so as to reduce the molecular weight of the oil-soluble product to between about 80,000 and about 300,000, and the ratio of M w /M n to between 1 and 4.
Claim 10
Dependent Claim
26 words
A lubricating composition comprising a major amount of a lubricating oil and from 0.1 to about 15.0 weight percent of the oil-soluble product of claim 1.
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) | 1982-09-24 | 1983-03-26 | 1983-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-24 | 1987-03-26 | 1987-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-24 | 1991-03-26 | 1991-09-25 | $7700.00 | Window Closed / Lapsed |