C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
C10M 135/28 (2006.01) C10M 105/18 (2006.01) C10M 105/32 (2006.01) C10M 107/50 (2006.01) C10M 169/04 (2006.01) C07C 319/14 (2006.01) C07C 319/28 (2006.01) C07C 321/30 (2006.01)
Patent
CA 2197686
There are provided a heat resistant lubricating oil composition comprising a lubricating base oil comprising an organic ester or a mixture of an organic ester and a polyphenyl ether or an organopolysiloxane, and incorporated with from 0.05% by weight to 10% by weight, based on the total weight of the lubricating oil composition, of a polyphenyl thioether represented by the following general formula (I): (see formula I) where R1, R2 and R3 which may be identical or different with each other each represent a hydrogen atom or a hydrocarbon group of 1 to 24 carbon atoms, x, y and z which may be identical or different with each other each represent an integer of 1 to 4 and m represent 0 or an integer of 1 to 3, a heat resistant lubricating oil composition containing, as a lubricating base oil, at least from 10% by weight to 90% by weight of a component selected from the group consisting of an organic ester, and a mixture of an organic ester and a polyphenyl ether or an organopolysiloxane and from 90% by weight to 10% by weight of the polyphenyl thioether represented by the general formula [I] described above, as well as a method of preventing oxidation of a heat resistant lubricating oil composition, further, a process for producing a polyphenyl thioether including a purification treatment for the improvement of the weather resistance of the polyphenyl thioether. The heat resistant lubricating oil composition obtained by the present invention has high heat resistance and oxidation resistance under a high temperature condition and can withstand severe working conditions such as in jet engines or gas turbines.
L'invention concerne une composition d'huile lubrifiante résistante à la chaleur que l'on prépare en mélangeant une base d'huile lubrifiante comprenant un ester d'acide organique ou un mélange d'un tel ester avec un polyphényle éther ou un organopolysiloxane, avec 0,05 à 10 % en poids d'un polyphényle thioéther ayant la formule générale (I) comme antioxydant. Dans cette formule, R<1>, R<2> et R<3> sont chacun un hydrogène ou un hydrocarbyle en C1-C24; x, y et z sont chacun un nombre entier compris entre 1 et 4; et m est égal à 0 ou à un nombre entier compris entre 1 et 3. Une autre composition d'huile lubrifiante résistante à la chaleur contient comme base d'huile, un mélange comprenant 10 à 90 % en poids de la base d'huile lubrifiante ci-dessus et 90 % à 10 % en poids du polyphényle thioéther ci-dessus. L'invention concerne également un procédé pour fabriquer le polyphényle thioéther en question. Les compositions de l'invention ont une très grande résistance à la chaleur et à l'oxydation à chaud et elles supportent donc des conditions dures comme celles qui prévalent dans les moteurs à réaction, les turbines à gaz ou similaire.
Kanbara Makoto
Kobori Atsuhisa
Nakamura Yoshinobu
Nakanishi Hiroshi
Onodera Ko
Borden Ladner Gervais Llp
Exxonmobil Research And Engineering Company
Tonen Corporation
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