Liquid Additives for the Stabilization of Lubricant Compositions

a technology of lubricant composition and additives, which is applied in the direction of liquid degasification, separation processes, organic chemistry, etc., can solve the problems of oxidative deterioration, loss of designated physical and tribological properties of lubricants, and formation of harmful deposits on critical engine parts

Inactive Publication Date: 2010-01-14
CHEMTURA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Lubricants, such as those used in a variety of machinery, are susceptible to oxidative deterioration during storage, transportation, and usage, particularly when such lubricants are exposed to high temperatures and iron catalytic environments, which greatly promote the oxidation of the lubricant.
This oxidation, if not controlled, contributes to the formation of corrosive acidic products, sludge, varnishes, resins, and other oil-insoluble products and may lead to a loss of designated physical and tribological properties of the lubricants.
These oxidation products may lead to the formation of harmful deposits on critical engine parts, such as the

Method used

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  • Liquid Additives for the Stabilization of Lubricant Compositions
  • Liquid Additives for the Stabilization of Lubricant Compositions
  • Liquid Additives for the Stabilization of Lubricant Compositions

Examples

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examples

[0127]Additive package blends 1-6 and A-C were prepared according to the proportions shown in TABLE 7.

TABLE 7Sulfur-ExpectedADPA-PNA-containingExpectedTEOSTTEOSTNaugalubeNaugardphenol-OIT,OIT,MHT,MHT,438LPNANaugalube-15minutesminutesmgmgExamples 1-610.70.150.153934.337.457.620.80.10.139.835.244.956.730.750.20.0545.538.343.057.240.70.10.234.931.939.157.550.90.050.0539.636.143.356.960.750.050.240.331.147.357.1Comparative Examples A-CA1.00037—55—B01052.0—63.7—C0013.8—63.0—

[0128]Each of additive packages 1-6 and A-C was blended with base stock at a weight ratio of about 99:1, base stock to additive package, to produce lubricant oil compositions. Example blends 1-6 are representative embodiments of the invention. Example blends A-C are comparative. The lubricant oil compositions were tested for OIT and TEOST MHT. The results are shown in TABLE 7.

[0129]As shown above, Comparative Examples A, B, and C represent pure ADPA, PNA and sulfur-containing phenol, respectively. These blends demonst...

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Abstract

A lubricating oil composition comprising: (A) a base stock; and (B) a liquid additive package. The liquid additive package comprises: (i) an alkylated diphenylamine; (ii) at least 5 weight % of a phenyl naphthylamine, based on the weight of the additive package; and (iii) a sulfur-containing phenol.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application claims priority to U.S. Provisional Application No. 61 / 080,547, filed on Jul. 14, 2008, the entirety of which is incorporated herein by reference.FIELD OF THE INVENTION[0002]The present invention relates to lubricating oil compositions. More specifically to lubricating oil compositions comprising additive packages for reducing oxidative deterioration.BACKGROUND OF THE INVENTION[0003]Lubricants, such as those used in a variety of machinery, are susceptible to oxidative deterioration during storage, transportation, and usage, particularly when such lubricants are exposed to high temperatures and iron catalytic environments, which greatly promote the oxidation of the lubricant. This oxidation, if not controlled, contributes to the formation of corrosive acidic products, sludge, varnishes, resins, and other oil-insoluble products and may lead to a loss of designated physical and tribological properties of the lubricant...

Claims

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Application Information

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IPC IPC(8): C10M105/76C10M133/12C10M107/30C10M105/32C10M133/14
CPCC10M141/08C10M2203/1006C10N2270/02C10M2215/064C10M2215/065C10M2215/28C10M2219/00C10M2219/022C10M2219/046C10M2219/06C10M2219/085C10M2219/087C10N2230/10C10N2230/62C10N2240/04C10N2240/042C10N2240/044C10N2240/08C10N2240/12C10N2240/30C10N2210/02C10N2030/10C10N2040/04C10N2040/08C10N2040/12C10N2040/30C10N2030/62C10N2040/042C10N2040/044C10N2070/02C10N2010/04
Inventor DONG, JUN
Owner CHEMTURA CORP
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