US4812246A
Expired / Lapsed
US
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Base oil for lubricating oil and lubricating oil composition containing said base oil
Assignee: Idemitsu Kosan Co Ltd
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Filing: 1988-02-25
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Granted: 1989-03-14
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Expires: 2008-02-25
Abstract
Abstract A base oil for lubricating oil, a lubricating oil composition containing the base oil and a phenol-based antioxidant and/or organomolybdenum compound, and also an additive for a base oil for lubricating oil, consisting of a phenol-based antioxidant and an organomolybdenum compound are disclosed. The base oil and the lubricating oil composition containing the base oil are stable against NO x gas and are useful for use in internal combustion engines. The additive, when added to a base oil, provides a lubricating oil which is stable against NO x gas and can be used effectively in a NO x gas atmosphere.
Inventors
- 👤 Takao Yabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:55
CPC Classifications
C; C10; C10M; C10M101/00; C10M101/02; C10M105/00; C10M105/02; C10M105/06; C10M107/00; C10M107/02; C10M107/04; C10M129/00; C10M129/02; C10M129/04; C10M129/10; C10M133/00; C10M133/02; C10M133/04; C10M133/06; C10M133/08; C10M135/00; C10M135/12; C10M135/14; C10M135/18; C10M135/20; C10M135/28; C10M135/30; C10M137/00; C10M137/02; C10M137/04; C10M137/10; C10M141/00; C10M141/08; C10M141/10; C10M169/00; C10M169/04; C10M2203/00; C10M2203/06; C10M2203/065; C10M2203/10; C10M2203/1006; C10M2203/102; C10M2203/1025; C10M2203/104; C10M2203/1045; C10M2203/106; C10M2203/1065; C10M2203/108; C10M2203/1085; C10M2205/00; C10M2205/02; C10M2205/0206; C10M2205/022; C10M2205/0225; C10M2205/026; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10M2207/026; C10M2207/027; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2219/00; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2219/08; C10M2219/082; C10M2219/083; C10M2219/087; C10M2219/088; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10N; C10N2010/00; C10N2010/12; C10N2040/00; C10N2040/25; C10N2040/251; C10N2040/255; C10N2040/28
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
53 words
A base oil for lubricating oil, having a kinematic viscosity as determined at 100° C. of 2 to 50 cSt, an aromatic content of not more than 2%, a viscosity index of at least 75, a pour point not more than -10° C., and a sulfur content of not more than 100 ppm.
Claim 2
Dependent Claim
53 words
A base oil for lubricating oil, having a kinematic viscosity as determined at 100° C. of 2 to 50 cSt, an aromatic content of not more than 2%, a viscosity index of at least 75, a pour point not more than -10° C., and a sulfur content of not more than 100 ppm.
Claim 3
Dependent Claim
58 words
A base oil for lubricating oil, which is a deep dewaxed oil having a kinematic viscosity of 100° C. of 2 to 50 cSt, an aromatic content of not more than 2%, a viscosity index of at least 75, a pour point of not more than -20° C. and a suflur content of not more than 100 ppm.
Claim 4
Dependent Claim
58 words
A base oil for lubricating oil, which is a deep dewaxed oil having a kinematic viscosity of 100° C. of 2 to 50 cSt, an aromatic content of not more than 2%, a viscosity index of at least 75, a pour point of not more than -20° C. and a suflur content of not more than 100 ppm.
Claim 5
Dependent Claim
35 words
A lubricating oil composition comprising a base oil having a kinematic viscosity as determined at 100° C. of 2 to 50 cSt and an aromatic content of not more than 2%, and a phenol-based antioxidant.
Claim 6
Dependent Claim
35 words
A lubricating oil composition comprising a base oil having a kinematic viscosity as determined at 100° C. of 2 to 50 cSt and an aromatic content of not more than 2%, and a phenol-based antioxidant.
Claim 7
Dependent Claim
32 words
The composition as claimed in claim 3 wherein the amount of the phenol-based antioxidant compounded is from 0.05 to 3.0 parts by weight per 100 parts by weight of the base oil.
Claim 8
Dependent Claim
32 words
The composition as claimed in claim 3 wherein the amount of the phenol-based antioxidant compounded is from 0.05 to 2.0 parts by weight per 100 parts by weight of the base oil.
Claim 9
Dependent Claim
34 words
A lubricating oil composition comprising a base oil having a viscosity as determined at 100° C. of 2 to 50 cSt and an aromatic content of not more than 2%, and an organomolybdenum compound.
Claim 10
Dependent Claim
34 words
A lubricating oil composition comprising a base oil having a viscosity as determined at 100° C. of 2 to 50 cSt and an aromatic content of not more than 2%, and an organomolybdenum compound.
Claim 11
Dependent Claim
31 words
The composition as claimed in claim 6 wherein the amount of the organomolybdenum compound is from 0.05 to 3.0 parts by weight per 100 parts by weight of the base oil.
Claim 12
Dependent Claim
31 words
The composition as claimed in claim 6 wherein the amount of the organomolybdenum compound is from 0.05 to 2.0 parts by weight per 100 parts by weight of the base oil.
Claim 13
Dependent Claim
37 words
A lubricating oil composition comprising a base oil having a viscosity as determined at 100° C. of 2 to 50 cSt and an aromatic content of not more than 2%, a phenol-based antioxidant and an organomolybdenum compound.
Claim 14
Dependent Claim
37 words
A lubricating oil composition comprising a base oil having a viscosity as determined at 100° C. of 2 to 50 cSt and an aromatic content of not more than 2%, a phenol-based antioxidant and an organomolybdenum compound.
Claim 15
Dependent Claim
37 words
The composition as claimed in claim 9 wherein the amount of each of the phenol-based antioxidant and the organomolybdenum compound is from 0.05 to 3.0 parts by weight per 100 parts by weight of the base oil.
Claim 16
Dependent Claim
37 words
The composition as claimed in claim 9 wherein the amount of each of the phenol-based antioxidant and the organomolybdenum compound is from 0.05 to 2.0 parts by weight per 100 parts by weight of the base oil.
Claim 17
Dependent Claim
25 words
The composition as claimed in claim 3 or 9 wherein the phenol-based antioxidant is at least one compound selected from 4,4'-methylenebis(2,6-di-tert-butylphenol); 4,4'-bis(2,6-di-tert-butylphenol); 4,4'-bis(2-methyl-6-tert-butylphenol); 2,2'-methylenebis(4-ethyl-6-tert-butylphenol); 2,2'-methylenebis(4-methyl-6-tert-butylphenol);
Claim 18
Dependent Claim
16 words
4'-butylidenebis(3-methyl-6-tert-butylphenol); 4'-isopropylidenebis(2,6-di-tert-butylphenol); 2,2'-methylenebis(4-methyl-6-nonylphenol); 2,2'-isobutylidenebis(4,6-dimethylphenol); 2,2'-methylenebis(4-methyl-6-cyclohexylphenol); 2,6-di-tert-butyl-4-methylphenol; 2,6.di-tert-butyl-4-ethylphenol; 2,4-dimethyl-6-tert-butylphenol; 2,6-di-tert-α-dimethylamino-p-cresol; 2,6-di-tert-butyl-4(N,N'-dimethylaminomethylphenol); 4,4'-thiobis(2-methyl-6-tert-butylphenol); 4,4'-thiobis(3-methyl-6-tert-butylphenol); 2,2'-thiobis(4-methyl-6-tert-butylphenol); bis(3-methyl-4-hydroxy-5-tert-butylbenzyl)sulfide and bis(3,5-di-tert-butyl-4-hydroxybenzyl)sulfide.
Claim 19
Dependent Claim
16 words
4'-butylidenebis(3-methyl-6-tert-butylphenol); 4'-isopropylidenebis(2,6-di-tert-butylphenol); 2,2'-methylenebis(4-methyl-6-nonylphenol); 2,2'-isobutylidenebis(4,6-dimethylphenol); 2,2'-methylenebis(4-methyl-6-cyclohexylphenol); 2,6-di-tert-butyl-4-methylphenol; 2,6.di-tert-butyl-4-ethylphenol; 2,4-dimethyl-6-tert-butylphenol; 2,6-di-tert-α-dimethylamino-p-cresol; 2,6-di-tert-butyl-4(N,N'-dimethylaminomethylphenol); 4,4'-thiobis(2-methyl-6-tert-butylphenol); 4,4'-thiobis(3-methyl-6-tert-butylphenol); 2,2'-thiobis(4-methyl-6-tert-butylphenol); bis(3-methyl-4-hydroxy-5-tert-butylbenzyl)sulfide and bis(3,5-di-tert-butyl-4-hydroxybenzyl)sulfide.
Claim 20
Dependent Claim
25 words
The composition as claimed in claim 6 or 9 wherein the organomolybdenum compound is at least one compound selected from molybdenum dithiocarbamate and molybdenum dithiophosphate.
Claim 21
Dependent Claim
58 words
The composition as claimed in claim 3, 6 or 9 wherein the base oil is a deep dewaxed oil having a kinematic viscosity at 100° C. of 2 to 50 cSt, an aromatic content of not more than 2%, a pour point of not more than -20° C. and a sulfur content of not more than 100 ppm.
Claim 22
Dependent Claim
18 words
An additive for a base oil for lubricating oil, consisting of a phenol-based antioxidant and an organomolybdenum compound.
Claim 23
Dependent Claim
18 words
An additive for a base oil for lubricating oil, consisting of a phenol-based antioxidant and an organomolybdenum compound.
Claim 24
Dependent Claim
39 words
The additive as claimed in claim 15 wherein the phenol-based antioxidant is at least one compound selected from 4,4'-methylenebis(2,6-di-tert-butylphenol); 4,4'-bis(2,6-di-tert-butylphenol); 4,4'-bis(2-methyl-6-tert-butylphenol); 2,2'-methylenebis(4-ethyl-6-tert-butylphenol); 2,2'-methylenebis(4-methyl-6-tert-butylphenol); 4'-butylidenebis(3-methyl-6-tert-butylphenol); 4,4'-isopropylidenebis(2,6-di-tert-butylphenol); 2,2'-methylenebis(4-methyl-6-nonylphenol); 2,2'-isobutylidenebis(4,6-dimethylphenol); 2,2'-methylenebis(4-methyl-6-cyclohexylphenol); 2,6-di-tert-butyl-4-methylphenol; 2,6-di-tert-butyl-4-ethylphenol; 2,4-dimethyl-6-tert-butylphenol; 2,6-di-tert-α-dimethylamino-p-cresol; 2,6-di-tert-butyl-4(N,N'-dimethylaminomethylphenol); 4,4'-thiobis(2-methyl-6-tert-butylphenol); 4,4'-thiobis(3-methyl-6-tert-butylphenol); 2,2'-thiobis(4-methyl-6-tert-butylphenol); bis(3-methyl-4-hydroxy-5-tert-butylbenzyl)sulfide and bis(3,5-di-tert-butyl-4-hydroxybenzyl)sulfide.
Claim 25
Dependent Claim
23 words
The additive as claimed in claim 15 wherein the organomolybdenum compound is at least one compound selected from molybdenum dithiocarbamate and molybdenum dithiophosphate.
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) | 1992-03-13 | 1992-09-12 | 1993-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-13 | 1996-09-12 | 1997-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-13 | 2000-09-12 | 2001-03-14 | $7700.00 | Window Closed / Lapsed |