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Lubricant Composition

a technology of lubricant composition and composition, applied in the field of lubricant composition, can solve the problems of reducing lubricating capacity, oxidative degradation, radical chain formation,

Inactive Publication Date: 2018-09-20
BASF AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a lubricant composition that includes a base oil and an antioxidant. The antioxidant has a specific structure and can help protect the lubricant from oxidation. The technical effect of this composition is to improve the antioxidant performance of the lubricant and enhance its ability to resist damage caused by oxidation.

Problems solved by technology

Combustion engine lubricants oxidize readily at the high operating temperatures of an engine, and in turn, have diminished lubricating capacity as the viscosity of the lubricant increases.
Oxidation products also tend to accumulate to form deposits, which in turn leads to greater wear on engine parts.
For example, peroxyl radicals can lead to formation of radical chains and ultimately oxidative degradation.
Unfortunately, many antioxidants do not react as fast as would be desired.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples

[0101]An example of the antioxidant of this disclosure is formed as set forth in the reaction schematic below.

example

[0102]

Additional Examples

[0103]Various antioxidants are evaluated to determine how they affect oxidation of various compounds. For example, in a first series of experiments, Styrene / PBD-BODIPY Autoxidation is evaluated at 37° C. The results of this evaluation is set forth in FIG. 1 which shows co-autoxidation of 4.3 M styrene and 10 μM PBD-BODIPY in PhCl at 37° C., initiated by 6.0 mM AIBN and inhibited by 2 μM of the antioxidants shown (kinh>>107). Under these conditions, the antioxidant that is representative of this disclosure completely suppresses autoxidation of the PBD-BODIPY exhibiting inhibition rate constants, k inh, above the measurable limit of the autoxidation experiments (kinh>>107 M−1s−1).

[0104]In a second series of experiments, Hexadecene / PBD-BODIPY autoxidation is evaluated at 70° C. and 100° C. The results of these evaluations are set forth in FIGS. 2A and 2B which show co-autoxidation of 2.8M n-Hexadecene and 10 M PBD-BODIPY in PhCl at 70° C., initiated by 87 mM tB...

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Abstract

A lubricant composition includes a base oil present in an amount of greater than 70 parts by weight per 100 parts by weight of the lubricant composition and an antioxidant. The antioxidant has the structure: wherein each X is independently CH or N, so long as at least one X is N, wherein Y is CRR′, NR″, PR″, S, or O, each R, R′ and R″ is independently H, alkyl or aryl, and R″ is alkyl, aryl, alkoxy or aryloxy. Each A is independently an electron donating group. The electron donating group (1) has an atom having at least one lone pair of electrons that is bonded directly to the aromatic ring, (2) is an aryl or alkyl group, or (3) is a hydrogen atom.

Description

FIELD OF THE DISCLOSURE[0001]This disclosure generally relates to a lubricant composition. More specifically, the lubricant composition includes a particular antioxidant that includes an electron donating group.BACKGROUND[0002]Lubricant compositions are generally well known in the art and are broadly categorized as oil or water based compositions, i.e., compositions that include large weight percentages of non-polar compounds (such as (base) oils) or large weight percentages of water, respectively. Lubricant compositions are typically further categorized as engine oils, driveline system oils, gear oils, greases, automatic and manual transmission fluids and oils, hydraulic oils, industrial gear oils, turbine oils, rust and oxidation (R&O) inhibited oils, compressor oils, or paper machine oils, etc. Each of these compositions has particular specifications and design requirements and most are designed to minimize corrosion and wear, to resist thermal and physical breakdown, and to be a...

Claims

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Application Information

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IPC IPC(8): C10M133/48C10M135/36
CPCC10M133/48C10M135/36C10M2215/221C10M2215/225C10N2230/10C10N2270/02C10M133/40C10M137/12C07D498/04C07D513/04C09K15/20C10N2030/10C10N2070/02
Inventor RABBAT, PHILIPPEDERY, MARY ELIZABETHRAKESTRAW, BRIDGETTSHUM, SAI P.ODORISIO, PAUL ANGELOPRATT, DEREK ANDREWHAIDASZ, EVAN ANTONY
Owner BASF AG