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US4479883A
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Lubricant composition with improved friction reducing properties containing a mixture of dithiocarbamates
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1984-02-21
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Granted: 1984-10-30
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Expires: 2004-02-21
Abstract
Abstract A lubricating oil composition having particularly improved friction reducing properties which comprises an ester of a polycarboxylic acid with a glycol or glycercol and a selected metal dithiocarbamate and contains a relatively low level of phosphorus.
Inventors
- 👤 Harold Shaub
- 👤 Barbara J. Schaeffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:53
CPC Classifications
C; C10; C10M; C10M161/00; C10M129/00; C10M129/02; C10M129/68; C10M129/76; C10M135/00; C10M135/12; C10M135/14; C10M135/18; C10M137/00; C10M137/02; C10M137/04; C10M137/10; C10M141/00; C10M141/08; C10M145/00; C10M145/18; C10M145/24; C10M145/26; C10M145/38; C10M2207/00; C10M2207/28; C10M2207/287; C10M2207/288; C10M2207/289; C10M2209/00; C10M2209/10; C10M2209/102; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/106; C10M2209/109; C10M2219/00; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
164 words
A lubricating oil composition with friction reducing properties comprising a major amount of lubricating oil, from about 0.05 to about 2 parts by weight of an ester of a dicarboxylic acid having from about 9 to about 42 carbon atoms between carboxylic acid groups and a glycol which is selected from the group consisting of alkane diols having from about 2 to about 12 carbon atoms or an oxa-alkane diol having from about 4 to about 200 carbon atoms, and from about 0.1 to about 2 parts by weight of a mixture of molybdenum dithiocarbamate and 1,2 dicarboethoxyethyl dithiocarbamate said dithiocarbamates having the formula: A [SCSNR.sub.2 ].sub.x (I) where A is molybdenum or 1,2 dicarboethoxyethyl, each R is an alkyl of 1 to 22 carbon atoms and x is an integer of 1 to 3; with at least about 25 percent by weight of said mixture being said molydenum dithiocarbamate; all other weights are based on 100 parts by weight of lubricating oil composition.
Claim 2
Dependent Claim
164 words
A lubricating oil composition with friction reducing properties comprising a major amount of lubricating oil, from about 0.05 to about 2 parts by weight of an ester of a dicarboxylic acid having from about 9 to about 42 carbon atoms between carboxylic acid groups and a glycol which is selected from the group consisting of alkane diols having from about 2 to about 12 carbon atoms or an oxa-alkane diol having from about 4 to about 200 carbon atoms, and from about 0.1 to about 2 parts by weight of a mixture of molybdenum dithiocarbamate and 1,2 dicarboethoxyethyl dithiocarbamate said dithiocarbamates having the formula: A [SCSNR.sub.2 ].sub.x (I) where A is molybdenum or 1,2 dicarboethoxyethyl, each R is an alkyl of 1 to 22 carbon atoms and x is an integer of 1 to 3; with at least about 25 percent by weight of said mixture being said molydenum dithiocarbamate; all other weights are based on 100 parts by weight of lubricating oil composition.
Claim 3
Dependent Claim
26 words
The composition of claim 1 further comprising phosphorus containing additives wherein the total phosphorus content of the composition is less than about 0.15 parts by weight.
Claim 4
Dependent Claim
14 words
The composition of claim 2 wherein said phosphorus containing additive is zinc dialkyl dithiophosphate.
Claim 5
Dependent Claim
36 words
The composition of claim 2 wherein from about 0.1 to about 0.5 parts by weight of said ester component are used and from about 0.15 to about 1.5 parts by weight of said dithiocarbamate are used.
Claim 6
Dependent Claim
18 words
The composition of claim 4 wherein the R groups in said carbamate contain 1 to 15 carbon atoms.
Claim 7
Dependent Claim
32 words
The composition of claim 5 wherein said ester is formed from a dimer acid of a conjugated fatty acid having from about 16 to about 22 carbon atoms between carboxylic acid groups.
Claim 8
Dependent Claim
23 words
The composition of claim 6 wherein said ester is formed by the esterification of a dimer acid of linoleic acid and diethylene glycol.
Claim 9
Dependent Claim
21 words
The composition of claim 7 wherein the total phosphorus content of the composition is less than about 0.1 parts by weight.
Claim 10
Dependent Claim
14 words
The composition of claim 8 wherein said phosphorus containing additive is zinc dialkyl dithiophosphate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1987-10-30 | 1988-04-30 | 1988-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-30 | 1992-04-30 | 1992-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-30 | 1996-04-30 | 1996-10-30 | $7700.00 | Window Closed / Lapsed |