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US4170561A
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Lubricating compositions with lactam or thiolactam-containing copolymers
Assignee: Entreprise de Recherches et dActivites Petrolieres SA
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Filing: 1978-03-15
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Granted: 1979-10-09
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Expires: 1998-03-15
Abstract
Abstract There are disclosed novel lubricating compositions containing a major proportion of a lubricating oil and a minor proportion of an oil soluble polymer additive, and possibly other additives, wherein said polymer additive is a copolymer of ethylene, a monoolefin having 3 to 6 carbon atoms or a monoolefin having 3 to 6 carbon atoms and a non-conjugated diene with one or more specific nitrogenous monomers, said polymer having a reduced viscosity, measured in decalin at 135° C., comprised between 0.5 and 2 and a polydispersity lower than 5. Such a polymer additive improves the oil viscosity index while ensuring the dispersion of the slurry it may contain.
Inventors
- 👤 Gilbert Chapelet
- 👤 Hubert Knoche
- 👤 Gilbert Marie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:57
CPC Classifications
C; C10; C10M; C10M151/00; C10M151/02; C10M143/00; C10M143/02; C10M149/00; C10M149/02; C10M149/10; C10M2203/00; C10M2203/06; C10M2205/00; C10M2205/02; C10M2205/022; C10M2205/026; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/34; C10M2207/40; C10M2207/402; C10M2207/404; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/105; C10M2209/108; C10M2209/109; C10M2217/00; C10M2217/02; C10M2217/028; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/044; C10M2221/00; C10M2221/02; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2040/00; C10N2040/02; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046; C10N2040/20; C10N2040/22; C10N2040/25; C10N2040/255; C10N2040/26; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
173 words
A lubricating composition comprising a major proportion of a lubricating oil and from about 0.2 to 10% by weight based on the weight of said oil, of an oil-soluble polymer additive having a reduced viscosity, measured as a 0.1% solution in decalin at 135° C., between about 0.5 and 2, and a polydispersity less than 5 wherein said polymer additive is an olefinic copolymer containing, by weight, x% units of ethylene, y% units of a mono-olefin having 3 to 6 carbon atoms or of a mono-olefin having 3 to 6 carbon atoms and a non-conjugated diene, the proportion of units resulting from the diene being lower than or equal to 20%, and z% units of one or more monomers of a lactam or a thiolactam having from 4 to 15 nuclear carbon atoms, the values of x, y and z being such that 5<x<75, 5<y<85 and 0.1<z<20 with the proviso that x+ y+z=100, said copolymer thereby improving the viscosity index (VI E ) of said oil and dispersing the slurry it may contain.
Claim 2
Dependent Claim
173 words
A lubricating composition comprising a major proportion of a lubricating oil and from about 0.2 to 10% by weight based on the weight of said oil, of an oil-soluble polymer additive having a reduced viscosity, measured as a 0.1% solution in decalin at 135° C., between about 0.5 and 2, and a polydispersity less than 5 wherein said polymer additive is an olefinic copolymer containing, by weight, x% units of ethylene, y% units of a mono-olefin having 3 to 6 carbon atoms or of a mono-olefin having 3 to 6 carbon atoms and a non-conjugated diene, the proportion of units resulting from the diene being lower than or equal to 20%, and z% units of one or more monomers of a lactam or a thiolactam having from 4 to 15 nuclear carbon atoms, the values of x, y and z being such that 5<x<75, 5<y<85 and 0.1<z<20 with the proviso that x+ y+z=100, said copolymer thereby improving the viscosity index (VI E ) of said oil and dispersing the slurry it may contain.
Claim 3
Dependent Claim
35 words
A lubricating composition according to claim 1 wherein the lactam or thiolactam is an N-alkenyl lactam or N-alkenyl thiolactam having 4 to 12 carbon atoms and the alkenyl radical has 2 to 8 carbon atoms.
Claim 4
Dependent Claim
53 words
A lubricating composition according to claim 2 wherein unsaturation is in the ω position relative to the heteroatom to which it is linked and derivatives thereof obtained by substituting the hydrogen atoms linked to the nuclear carbon atoms by an alkyl radical having 1 to 6 carbon atoms or by a phenyl radical.
Claim 5
Dependent Claim
51 words
A lubricating composition according to claim 1 wherein the lactam or thiolactam comprises a member selected from the group consisting of N-vinyl pyrrolidone, N-vinyl methyl-5 pyrrolidone, N-vinylmethyl-3 pyrrolidone, N-vinylethyl-5 pyrrolidone, N-vinyldimethyl-5, 5-pyrrolidone, N-vinylphenyl-5 pyrrolidone, N-allylpyrrolidone, N-vinylthiopyrrolidone, N-vinylpiperidone, N-vinyldiethyl-6,6 piperidone, N-vinyl caprolactam, N-vinylmethyl-7 caprolactam, N-vinylethyl-7 caprolactam, N-vinyldimethyl-7,7 caprolactam, N-vinylthiocaprolactam, N-allylcaprolactam and N-vinylcapryllactam.
Claim 6
Dependent Claim
13 words
A lubricating composition according to claim 4 wherein the lactam compound is N-vinylpyrrolidone.
Claim 7
Dependent Claim
17 words
A lubricating composition according to claim 1 wherein the polymer additive comprises N-vinyl pyrrolidone, ethylene and propene.
Claim 8
Dependent Claim
20 words
A lubricating composition according to claim 1 wherein the reduced viscosity of the copolymer additive is between 0.7 and 1.7.
Claim 9
Dependent Claim
18 words
A lubricating composition according to claim 1 wherein the polydispersity of the copolymer additive is less than 4.
Claim 10
Dependent Claim
19 words
A lubricating composition according to claim 1 wherein the polydispersity of the copolymer additive is between 2 and 3.5.
Claim 11
Dependent Claim
28 words
A lubricating composition according to claim 1, wherein said values of x, y and z of the units constituting the copolymer are such that 20<x<75, 20<y<75, and 0.15<z<15.
Claim 12
Dependent Claim
28 words
A lubricating composition according to claim 1, wherein the copolymer is a random copolymer obtained by coordination catalysis with complexation of the lactam monomer by a Lewis acid.
Claim 13
Dependent Claim
50 words
A lubricating composition according to claim 1, wherein the copolymer is a graft copolymer resulting from the grafting of at least one lactam monomer onto an amorphous copolymer of ethylene with olefins having 3 to 6 carbon atoms, or with olefins having 3 to 6 carbon atoms and non-conjugated dienes.
Claim 14
Dependent Claim
26 words
A lubricating composition according to claim 12, wherein said amorphous copolymer has a reduced viscosity between about 0.5 and 2 and a polydispersity less than 5.
Claim 15
Dependent Claim
26 words
A lubricating composition according to claim 13, wherein said amorphous copolymer has a reduced viscosity between about 0.7 and 1.7 and a polydispersity less than 4.
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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) | 1982-10-08 | 1983-04-09 | 1983-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-08 | 1987-04-09 | 1987-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-08 | 1991-04-09 | 1991-10-09 | $7700.00 | Window Closed / Lapsed |