Multi-vehicle automatic transmission fluid

A transmission, fluid technology, applied in the field of lubricating compositions, additive packages and lubricating transmissions, which can solve the problems of unfavorable Brookfield viscosity, no longer meeting low temperature viscosity limits, and unfavorable fluid properties.

Active Publication Date: 2014-01-29
AFTON CHEMICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, an additive that improves one property of a fluid may adversely affect another
For example, increasing the amount of friction modifier in a transmission fluid to improve the friction durability of the fluid would adversely increase the Brookfield Viscosity (BV) of the fluid by an undesired amount such that the fluid would no longer meet the desired low temperature viscosity limit

Method used

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  • Multi-vehicle automatic transmission fluid
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Examples

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Embodiment

[0144] The following non-limiting examples are provided to further illustrate the features and advantages of one or more embodiments of the present invention. All fluids tested in the following table contained the components shown in Table 2 to provide a fully formulated lubricating fluid composition. In this table, the extreme pressure / antiwear agent (DMTD) is 2,5-bis-(hydrocarbyl disulfide)-1,3,4-thiadiazole and its monosubstituted equivalent 2-hydrocarbyl sulfide-5- A commercially available mixture of mercapto-1,3,4-thiadiazole, with approximately 85% dihydrocarbyl: 15% monohydrocarbyl, is called "thiadiazole" in the table. The friction modifier (FM1), the specific modifier of the embodiment of the present disclosure, is a mixture of the above-mentioned olefins (wherein at least 40% by weight of the olefin is C 10 -C 36 The friction modifier (FM2) is made of conventional linear α-olefins. The weight of all components in the table is the weight of the components in the final...

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Abstract

A lubricant composition, a multi-vehicle transmission fluid, and a method for making a transmission fluid. The lubricant composition includes a) a base oil; b) 2,5-dimercapto-1,3,4-thiadiazole (DMTD), a derivative of DMTD, or mixtures thereof; and c) a friction modifier. The friction modifier is made by reacting an olefin containing at least 40 % by weight C 10 -C 36 vinylidene olefin with maleic acid, anhydride, or ester to provide a first reaction product, and aminating the first reaction product with an effective amount of a compound containing basic nitrogen to provide the friction modifier. The C 10 -C 36 vinylidene olefin is represented by the following formula: wherein R c and R d are independently a (C 3 -C 15 ) alkyl, cycloalkyl or cycloalkenyl.

Description

technical field [0001] The present invention relates to lubricating compositions, additive packages and methods of lubricating transmissions, particularly lubricating fluids that meet or exceed vehicle transmission fluid specifications of various vehicle manufacturers. Background technique [0002] A vehicular transmission system is suitably configured to provide improved power transmission efficiency, and improved fuel efficiency. The transmission mechanism may include a manual transmission, a conventional step-by-step automatic transmission, a continuously variable transmission, a dual clutch transmission, or other types of vehicle transmissions. Such transmissions are typically used with conventional gasoline or diesel engine systems. [0003] With the development of newer, more fuel-efficient vehicles, there is an ever-changing need for more versatile lubrication and power transmission fluids. Additionally, different manufacturers have different standards or specificat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10N40/04C10N30/06C10N30/12C10N20/02
CPCC10N2230/02C10N2240/04C10N2230/06C10M141/08C10M2215/28C10M2219/106C10M2215/086C10N2030/02C10N2030/06C10N2040/04C10N2020/071C10M133/04C10M169/04
Inventor J.B.卡罗尔C.S.克利夫兰
Owner AFTON CHEMICAL
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