Classifications

• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M1/00—Liquid compositions essentially based on mineral lubricating oils or fatty oils; Their use as lubricants
  • C10M1/08—Liquid compositions essentially based on mineral lubricating oils or fatty oils; Their use as lubricants with additives
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
  • C10M2207/28—Esters
  • C10M2207/283—Esters of polyhydroxy compounds
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
  • C10N2030/08—Resistance to extreme temperature
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2040/00—Specified use or application for which the lubricating composition is intended
  • C10N2040/12—Gas-turbines
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2040/00—Specified use or application for which the lubricating composition is intended
  • C10N2040/12—Gas-turbines
  • C10N2040/13—Aircraft turbines

Definitions

• the two alkyl groups in position 2 on the propanediols contain a maximum of 4 carbon atoms in these prior-art lubricating oils.
• the esterbase lubricating oils made from propanediols substituted in this manner are not suitable, however, for use in aircraft engines and gas turbines. The reason is that, if shortchain monocarboxylic acids are used for the esterification of these propanediols, the lubricating oils made from them have a low viscosity. This means that they have a high evaporation loss at high temperatures.
• the invention relates to lubricating oils, especially for aircraft engines and gas turbines, on the basis of esters made of 2,2-dialkylpropanedi0l-1,3 and monocarboxylic acids.
• Lubricating oils for aircraft engines and gas turbines must be stable and permit lubrication over a broad range oils must have a high viscosity index, so as to have a sufficiently high viscosity at operating temperature and a low viscosity at starting temperature.
• Viscosity indexes are determined from the viscosities at 100 F. and 200 F. in accordance with AS'IM, SIP N o. 168, June 1955 (American Society for Testing Materials, Special Technical Publication No. 168, Viscosity Index). The viseositics reported are in centistokes.
• the subject of the invention is lubricating oils on the basis of diesters formed of 2,2-dialkylpropanediol-l,3 and monocarboxylic acids, which are characterized in that at least one of the two alkyl groups of the propanediol has more than 4 carbon atoms.
• Esters in which the side chains of the 2,2-dialkylpropanediol-l,3 compounds contain between 6 and 14 carbon atoms are preferentially suitable as lubricating 35 bricflting Oil additive of different Composition in an Oils, according to a l f improvement of the invention. amount effective to improve the lubricating properties of The P and can be the as those used the oil, characterized in that one of the alkyl groups of in the prior art in the known esters of 2,2-d1alkylpropaneth 1 h 4 t 10 b t d th th diol'l,3.
• Monocarboxylic acids having 6 to 20 carbon C Propane 10 as 0 car on a Oms an e er atoms in the molecule are preferred as acid components 40 0f 531d alkyl groups has to carbon atoms, Sald dlestel of the ester lubricant oils according to the invention. being at least about 80 wt. percent of said lubricating oil.
• Lubricating oil according to claim 1, both of said or examp e, compose a eas a on 0 y weig o the lubricating oil composition.
• they can be alalkyl gmuPs to 10 C arbon loyed with lubricating oils on a mineral oil basis and/or 45 Lubncatmg 011 accordmg to 0131111 the acld groups mixed with 0.1 to and preferably 2 to 8%, by weight, of additives such as oxidation inhibitors, corrosion having 6 to 20 carbon atoms.
• the lubricating oil characteristics of a number of esters are r listed in Table 2 below.
• oil comprises a mineral oil.
• Lubricating oil according to claim 2 the acid groups having 6 to 20 carbon atoms.
• esters can be produced by conventional esterifica- References Cited 2 PFOCeSSCS- d d b h UNITED STATES PATENTS n important a vantage ac leve y t e invention consists of the fact that the new ester lubricant oils have a 2499984 3/1950 et a1 25256X 2,950,250 8/1960 Fainman 25256X significantly lower evaporation loss and better stability 2 991 297 7/1961 Cool: et al 260 410 6 to oxidation than the prior-art esters of 2,2-dialkyl- 3,048,608 8/1962 Girard et al 25256X propanediol-1,3 compounds.

Landscapes

• Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Lubricants (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=7054115

Family Applications (1)

Country Status (8)

Cited By (9)

• 1967
  • 1967-02-23 DE DE19671594413 patent/DE1594413A1/de active Pending
• 1968
  • 1968-01-09 CH CH29468A patent/CH494813A/de not_active IP Right Cessation
  • 1968-02-01 NL NL6801495A patent/NL6801495A/xx unknown
  • 1968-02-09 AT AT123168A patent/AT277426B/de not_active IP Right Cessation
  • 1968-02-16 GB GB7735/68A patent/GB1209501A/en not_active Expired
  • 1968-02-19 US US706633A patent/US3560387A/en not_active Expired - Lifetime
  • 1968-02-23 BE BE711228A patent/BE711228A/xx unknown
  • 1968-02-23 FR FR1577319D patent/FR1577319A/fr not_active Expired

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