发明公开
EP0572273A1 Lubricating oil compositions containing dispersants for two-cycle engines
失效
Dispergatoren enthaltendeSchmierölzusammensetzungenfürZweitaktmotoren。
- 专利标题： Lubricating oil compositions containing dispersants for two-cycle engines
- 专利标题（中）： Dispergatoren enthaltendeSchmierölzusammensetzungenfürZweitaktmotoren。
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申请号： EP93304180.8申请日： 1993-05-28
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公开(公告)号： EP0572273A1公开(公告)日： 1993-12-01
- 发明人: Koganei, Katsuya, c/o Tonen Corporation Corp. , Nomura, Takeshi, c/o Tonen Corporation Corp. , Kuribayashi, Toshiaki, c/o Tonen Corporation Corp. , Umemoto, Noboru, c/o Tonen Corporation Corp.
- 申请人： Tonen Corporation
- 申请人地址： 1-1 Hitotsubashi, 1-Chome Chiyoda-Ku Tokyo 100 JP
- 专利权人： Tonen Corporation
- 当前专利权人： Tonen Corporation
- 当前专利权人地址： 1-1 Hitotsubashi, 1-Chome Chiyoda-Ku Tokyo 100 JP
- 代理机构： Dixon, Donald Cossar
- 优先权： JP139405/92 19920529
- 主分类号： C10M169/04
- IPC分类号： C10M169/04 ; C10M105/32
摘要：
Lubricating oil compositions for two-cycle (two-stroke) engines are described, of three types, comprising by weight (viscosity being kinetic at 100°C) :
1. (a) 30 to 70% of a polyol ester having a viscosity of 9 to 15 cSt, (b) 30 to 70% of a diester having a viscosity of 2 to 5 cSt, (c) 1 to 5% of a polybutene having a molecular weight of 500 to 2,500 and/or 1 to 5% of a polymethacrylate having a molecular weight of 5,000 to 40,000, and (d) 5 to 25% of a dispersant.
2. (a) 30 to 70% of a polyol ester having a viscosity of 4 to 15 cSt, (b) 0 to 35% of a complex ester having a viscosity of 10 to 14 cSt, (c) 10 to 70% of a diester having a viscosity of 2 to 5 cSt, and (d) 5 to 25% of a dispersant.
The dispersant (d) is preferably a polyamide; it prevents formation of deposits on the engine.
3. A lubricating base oil contains 5 to 25% of a polyamide type of dispersant and also a neutral calcium sulfonate and a neutral calcium salicylate which together amount to 0.1 to 5% by weight of the composition. The base oil can be a mixture of components (a) to (c) of composition 1 or 2, a mineral oil or a poly-α-olefin.
The compositions can have other additives, and can be used as a low-oil, e.g. 100:1, mixture with gasoline, and they have good biodegradibility.
1. (a) 30 to 70% of a polyol ester having a viscosity of 9 to 15 cSt, (b) 30 to 70% of a diester having a viscosity of 2 to 5 cSt, (c) 1 to 5% of a polybutene having a molecular weight of 500 to 2,500 and/or 1 to 5% of a polymethacrylate having a molecular weight of 5,000 to 40,000, and (d) 5 to 25% of a dispersant.
2. (a) 30 to 70% of a polyol ester having a viscosity of 4 to 15 cSt, (b) 0 to 35% of a complex ester having a viscosity of 10 to 14 cSt, (c) 10 to 70% of a diester having a viscosity of 2 to 5 cSt, and (d) 5 to 25% of a dispersant.
The dispersant (d) is preferably a polyamide; it prevents formation of deposits on the engine.
3. A lubricating base oil contains 5 to 25% of a polyamide type of dispersant and also a neutral calcium sulfonate and a neutral calcium salicylate which together amount to 0.1 to 5% by weight of the composition. The base oil can be a mixture of components (a) to (c) of composition 1 or 2, a mineral oil or a poly-α-olefin.
The compositions can have other additives, and can be used as a low-oil, e.g. 100:1, mixture with gasoline, and they have good biodegradibility.
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