申请人:Tonen Corporation
公开号:EP0778334A1
公开(公告)日:1997-06-11
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]:
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.
提供了一种耐热润滑油组合物,该组合物包含由有机酯或有机酯与聚苯醚或有机聚硅氧烷的混合物组成的润滑基础油,并掺入了以润滑油组合物总重量为基准,按重量计0.05%至10%的由下式通式[I]表示的聚苯硫醚:
其中,R1、R2 和 R3 可相互相同或不同,各自代表氢原子或 1 至 24 个碳原子的烃基;x、y 和 z 可相互相同或不同,各自代表 1 至 4 的整数;m 代表 0 或 1 至 3 的整数; 一种耐热润滑油组合物,作为润滑基础油,至少含有 10%(重量)至 90%(重量)选自有机酯组的组分、和有机酯与聚苯醚或有机聚硅氧烷的混合物,以及由上述通式[I]表示的聚苯硫醚的重量百分比从90%到10%,以及防止耐热润滑油组合物氧化的方法。
本发明获得的耐热润滑油组合物在高温条件下具有很高的耐热性和抗氧化性,可承受喷气发动机或燃气轮机等恶劣的工作条件。