Gear and engine oils with reduced surface tension
US10323207B2 · kind B2 · utility
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17Claims
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Key dates
| Filing date | Nov 20, 2014 |
| Grant date | Jun 18, 2019 |
| Priority date | — |
| Expiry date | Jan 3, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A gear or engine oil or other type of lubricant, which effectively reduces churning losses in a dip lubrication system or any lubrication system where churning loss occur has a surface tension less than 28 mN/m and viscosity less than 400 mPa-sec at 25° C. (about 500 cSt at 25° C.). Formulations include Group I-IV base oil, in combination with an amount of silicone oil effective to decrease the surface tension of the oil, thereby reducing churning losses. When the base oil is prominently Group III, the coefficient of friction of the gear oil is also reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.