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Cold Cranking Simulator Viscosity Reducing Base Stocks and Lubricating Oil Formulations Containing the Same

a cranking simulator and viscosity reduction technology, which is applied in the field of cold cranking simulator viscosity, can solve the problems of difficult to achieve the maximum allowable kv100 in engine oil, negatively affecting wear protection in automotive engines, and affecting wear performance, so as to reduce the ccsv of an oil composition

Inactive Publication Date: 2018-10-04
EXXONMOBIL CHEM PAT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes using a specific type of chemical called mono-ester to reduce the carbon dioxide and sulfur dioxide (CCSV) in oil. This chemical does not significantly affect the oil's viscosity or other important properties, making it ideal for use in formulating engine oils. The technical effect is to create a more efficient base stock for reducing emissions in oil, which can help improve engine performance.

Problems solved by technology

Lower viscosity engine oils promise to maximize fuel economy, but the thinner oils can negatively impact wear protection in automotive engines.
In practice, it is difficult to achieve the maximum allowable KV100 in an engine oil, especially those of a 0 W or 5 W grade, and still meet the demanding CCSV requirements.
This can negatively impact wear performance.

Method used

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  • Cold Cranking Simulator Viscosity Reducing Base Stocks and Lubricating Oil Formulations Containing the Same
  • Cold Cranking Simulator Viscosity Reducing Base Stocks and Lubricating Oil Formulations Containing the Same
  • Cold Cranking Simulator Viscosity Reducing Base Stocks and Lubricating Oil Formulations Containing the Same

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0102]2-Octyldodecyl dodecanoate derived from a Guerbet alcohol (i.e., 2-octyl-1-dodecanol) and a linear acid (i.e., decanoic acid, a linear C12 carboxylic acid) demonstrated excellent CCSV-reducing efficacy when blended at low treat rate with PAO-4 as the reference oil. As shown in FIG. 2, 2-octyldodecyl dodecanoate demonstrated a negative D(ccsv)3 is quite high, making it a highly effective CCSV-reducing base stock without significantly impacting the KV100 of the mixture oil.

example 2

[0103]2-Octyldodecyl nonanoate derived from a Guerbet alcohol (i.e., 2-octyl-1-dodecanol) and a linear acid (i.e., nonanoic acid, a linear C9 carboxylic acid) demonstrated excellent CCSV-reducing efficacy when blended at low treat rate with PAO-4 as the reference oil. As shown in FIG. 2, 2-octyldodecyl nonanoate demonstrated a negative D(ccsv)3 is quite high, making it a highly effective CCSV-reducing base stock without significantly impacting the KV100 of the mixture oil.

example 3

Comparative

[0104]Di-iso-octyl adipate derived from iso-octyl alcohol and adipic acid (Esterex™ A32, a commercial Group V ester-type base stock available from ExxonMobil Chemical Company having an address at 4500 Bayway Drive, Baytown, Tex. 77450, United States) demonstrated CCSV-reducing efficacy as shown in FIG. 3. However, the high Noack volatility (>30%) of this di-ester precludes this ester from being an inventive example of a CCSV-reducing base stock. As shown by this example, it is possible to reduce the CCSV of a formulation simply by including an ester of low molecular weight such as Esterex™ A32. However, the high NV value of such an ester renders it unsuitable for an engine oil formulation. On the contrary, the CCSV-reducing mono-esters of this disclosure have a NV value of no higher than 20%, preferably no higher than15%, still more preferably no higher than 10%.

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Abstract

This disclosure relates to cold cranking simulator viscosity (“CCSV”) reducing base stocks that allow flexibility for low viscosity SAE engine oil grades (e.g., 5 W and 0 W) to meet demanding low temperature viscosity requirements while maintaining a higher base oil viscosity for improved wear protection. The CCSV-reducing base stocks include mono-esters derivable from a Guerbet alcohol and a monocarboxylic acid. The disclosure also relates to lubricating oil formulations containing the CCSV-reducing base stocks, and a method for determining the CCSV-reducing efficacy of a base stock.

Description

CROSS-REFERENCE OF RELATED APPLICATIONS[0001]This application claims the benefit of Provisional Application No. 62 / 477,759, filed Mar. 28, 2017, the disclosures of which is incorporated herein by reference.FIELD OF THE INVENTION[0002]This disclosure relates to cold cranking simulator viscosity (“CCSV”) reducing base stocks that allow flexibility for low viscosity SAE engine oil grades (e.g., 5 W and 0 W) to meet demanding low temperature viscosity and high temperature viscosity requirements, lubricating oil formulations containing the CCSV-reducing base stocks, and a method for improving fuel efficiency and / or wear protection in an engine by using as the engine oil a lubricating oil formulation containing one or more of the CCSV-reducing base stocks.BACKGROUND OF THE INVENTION[0003]Increased regulatory pressure to improve fuel efficiency and reduce carbon emissions is shifting the automotive industry toward use of lower viscosity grade engine oils. Lower viscosity engine oils promis...

Claims

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Application Information

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IPC IPC(8): C10M105/34C10M169/04
CPCC10M105/34C10M169/042C10N2230/02C10N2230/08C10N2020/02C10N2040/25C10N2220/022C10M171/02C10M2203/1025C10M2205/0285C10M2207/2815C10M2207/2825C10M2207/2835C10M2207/2855C10N2030/02C10N2030/08C10N2070/00
Inventor LEWIS, KYLE G.
Owner EXXONMOBIL CHEM PAT INC
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