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Lubricating composition

a technology of lubricating composition and additives, which is applied in the direction of liquid degasification, thickeners, separation processes, etc., can solve the problems of increasing the use of additives in lubricant compositions to achieve various functions, and increasing the cost of additives. , to achieve the effect of reducing high temperature shear viscosity, improving torque, and increasing fuel economy

Inactive Publication Date: 2008-10-30
AFTON CHEMICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]In another aspect, there is provided a method of improving torque in a machine comprising providing to the machine a composition comprising a base oil having reduced high temperature high shear viscosity as compared to another base oil.
[0011]In a further aspect, there is provided a method of increasing fuel economy in a vehicle comprising providing to the vehicle a composition comprising a base oil, wherein the ratio of isoparaffins to normal paraffins in the base oil ranges from about 30 to about 400.
[0012]In yet another aspect, there is provided a method of reducing thin-film friction of a fluid between surfaces comprising providing to the surfaces a composition comprising a base oil, wherein the ratio of isoparaffins to normal paraffins in the base oil ranges from about 30 to about 400.

Problems solved by technology

In recent years, compositional differences between lubricants has become an increasingly important issue as changing engine and industrial applications demand higher quality lubricants which can provide improved functions.
However, it is known that some additives are very expensive.
And, the use of additional amounts of an additive to a lubricant composition to achieve various functions, such as to reduce thin-film friction or to prolong the useful life of a lubricant, can be quite costly to the manufacturer.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0054]It is known in the industry that Group II or III base oils comprise more than 90% saturates, less than 0.03% sulfur, and have a viscosity index from about 80 to about 120 or greater. However, not all Group II or III base oils have the same power transmission properties. As shown in Table 1, fully finished lubricating compositions comprising various Group II and III base oils were analyzed according to the procedure in Analytical Chemistry, 64:2227 (1992), the disclosure of which is hereby incorporated by reference, in order to determine the type of paraffins, cycloparaffins, and aromatics in the compositions.

[0055]In this example, a 2003 Chevrolet Silverado pick-up truck was powered by a 5.3 L V8 engine that was lubricated by the lubricating compositions listed in Table 1. The truck was restrained on a Mustang Performance Dynamometer that was programmed with the appropriate inertia and horsepower absorbance factors for the vehicle. Horsepower was measured at the rear wheels wh...

example 2

[0058]In this example, fully formulated lubricating compositions were prepared by blending several different Group II and II+base oils with 11.5 wt. % of a DI package (HiTEC® 1136, provided by Afton Chemical Corp.), 8.6 wt. % of an ethylene-propylene olefin copolymer viscosity index improver (Paratone® 8021, provided by Chevron Oronite), and 0.5 wt. % of a polymethacrylate pour point depressant (Viscoplex® 1-440, provided by RohMax). The DI package included a calcium overbased detergent, zinc dialkyldithiophosphate, amine-free organic friction modifier, moldybenum-containing friction modifier, diphenylamine antioxidant, sulfurized olefin antioxidant, antifoam agent, and process oil.

[0059]Each lubricating composition was analyzed according to the procedure described above. The HTHSV of each lubricating composition was also measured according to ASTM D 4683 at 100° C., as described above. The results are shown in Table 2 below.

TABLE 2100° C. HTHSVAvg. ParaffinI / NExamples(mPa * s)Carbo...

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Abstract

There is disclosed a lubricant composition comprising a base oil, wherein the ratio of isoparaffins to normal paraffins in the base oil ranges from about 30 to about 400.

Description

DESCRIPTION OF THE DISCLOSURE[0001]1. Field of the Disclosure[0002]The present disclosure relates to a lubricating composition comprising a base oil, wherein the ratio of isoparaffins to normal paraffins in the base oil ranges from about 30 to about 400, and methods of use thereof.[0003]2. Background of the Disclosure[0004]In recent years, compositional differences between lubricants has become an increasingly important issue as changing engine and industrial applications demand higher quality lubricants which can provide improved functions. For example, there has been a growing concern to produce lubricants that can increase power transmission, such as by increasing torque, in a machine. Moreover, modern engine oil specifications require lubricants to demonstrate fuel efficiency in standardized engine tests.[0005]Historically, in order to meet new performance requirements, formulators enhanced lubricants by selecting and including more robust additive packages. However, it is known...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10M159/24C10M115/08
CPCC10M169/04C10M2205/0206C10M2205/022C10M2209/084C10M2215/064C10M2219/022C10M2223/045C10N2210/06C10N2220/027C10N2220/028C10N2230/54C10N2230/56C10N2240/04C10N2240/10C10M2205/024C10N2010/12C10N2020/069C10N2020/071C10N2030/54C10N2030/56C10N2040/04C10N2040/25C10M101/02C10M105/04
Inventor DEVLIN, MARK T.JAO, TZE-CHIANDERSON, GREGORY PAULGUINTHER, GREGORY H.
Owner AFTON CHEMICAL
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