EP0286996A2
Expired / Lapsed
EP
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Lubricating oil composition
Assignee: Idemitsu Kosan Co Ltd
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Filing: 1988-04-09
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Granted: —
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Expires: 2008-04-09
Abstract
Abstract A lubricating oil composition comprising: (A) a base oil having a naphthene content of at least 30%, an aromatic content of not more than 2%, and a kinematic viscosity at 100°C of 1.5 to 30 cSt; and (B) 0.01 to 5% by weight based on the total weight of the composition of a friction modifier. This composition is very useful as a lubricating oil for use in an automatic transmission or a continuously variable transmission, or as a lubricating oil for use in parts including a wet clutch or a wet brake of an agricultural tractor, etc.
Inventors
- 👤 Dasai Masashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 14:56
CPC Classifications
C; C10; C10M; C10M105/00; C10M105/02; C10M105/04; C10M169/00; C10M169/04; C10M169/045; C10M101/00; C10M101/02; C10M105/06; C10M107/00; C10M107/02; C10M107/08; C10M129/00; C10M129/02; C10M129/04; C10M129/06; C10M129/26; C10M129/28; C10M129/38; C10M129/40; C10M129/42; C10M129/48; C10M129/54; C10M129/68; C10M129/76; C10M133/00; C10M133/02; C10M133/16; C10M137/00; C10M137/02; C10M137/04; C10M137/08; C10M159/00; C10M159/02; C10M159/08; C10M159/12; C10M159/20; C10M159/22; C10M159/24; C10M2203/00; C10M2203/02; C10M2203/022; C10M2203/024; C10M2203/04; C10M2203/045; 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; C10M2205/026; C10M2205/0265; C10M2205/04; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/023; C10M2207/024; C10M2207/026; C10M2207/028; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/125; C10M2207/126; C10M2207/127; C10M2207/129; C10M2207/14; C10M2207/142; C10M2207/144; C10M2207/146; C10M2207/22; C10M2207/26; C10M2207/262; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/287; C10M2207/288; C10M2207/289; C10M2207/34; C10M2207/40; C10M2207/402; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/08; C10M2215/082; C10M2215/086; C10M2215/12; C10M2215/122; C10M2215/24; C10M2215/26; C10M2215/28; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/024; C10M2219/04; C10M2219/046; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/089; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/043; C10M2223/045; C10M2223/049; C10M2223/10; C10M2223/12; C10M2223/121; C10M2225/00; C10M2225/04; C10N; C10N2010/00; C10N2010/04; C10N2010/06; C10N2040/00; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046; C10N2040/08; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
55 words
A lubricating oil composition comprising: (A) a base oil having a naphthene content of at least 30%, an aromatic content of not more than 2%, and a kinematic viscosity at 100°C of 1.5 to 30 cSt; and (B) 0.01 to 5% by weight based on the total weight of the composition of a friction modifier.
Claim 2
Dependent Claim
55 words
A lubricating oil composition comprising: (A) a base oil having a naphthene content of at least 30%, an aromatic content of not more than 2%, and a kinematic viscosity at 100°C of 1.5 to 30 cSt; and (B) 0.01 to 5% by weight based on the total weight of the composition of a friction modifier.
Claim 3
Dependent Claim
82 words
The composition as claimed in Claim 1 wherein the friction modifier (B) is at least one compound selected fro the group consisting of phosphoric acid esters, phosphorous acid esters, amine salts of phosphoric acid esters, amine salts of phosphorous acid esters, sorbitan fatty acid esters, pentaerythritol fatty acid esters, glycerine fatty acid esters, trimethylolpropane fatty acid esters, glycol fatty acid esters, carboxylic acids, carboxylic acid amides, carboxylic acid esters, metal salts of carboxylic acids, fats and oils, higher alcohols and sulfur-containing compounds.
Claim 4
Dependent Claim
16 words
The composition as claimed in Claim 1 wherein the base oil (A) is a mineral oil.
Claim 5
Dependent Claim
26 words
The composition as claimed in Claim 3 wherein the mineral oil is a deep dewaxed oil obtained by subjecting a purified oil to deep dewaxing treatment.
References Cited (Backward Citations)
No citation records indexed.
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