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Lubricating Oil Composition

a technology of lubricating oil and composition, which is applied in the direction of lubrication of auxiliaries, machines/engines, mechanical equipment, etc., can solve the problems of increasing the level of haze and sediment, reducing the efficiency of lubricating oil, so as to achieve the effect of reducing copper corrosion and superior deposit control properties

Inactive Publication Date: 2011-10-06
DAMBACHER JESSE D +5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention provides a lubricating oil composition that exhibits superior deposit control properties while minimizing copper corrosion. This is achieved by controlling the value of n in the oil-soluble oxyalkylated detergent, wherein less than 45 mole% of the phenolic functional groups of the detergent are non-oxyalkylated (n=0). The invention also provides a method of making the additive component used in the lubricating oil composition, which involves oxyalkylating hydrocarbyl phenol condensates with ethylene carbonate, propylene carbonate, or butylene carbonate. The invention also provides a method of lubricating surfaces of an internal combustion engine by using the lubricating oil composition described herein."

Problems solved by technology

Products with high levels of n≧2 have inferior oil solubility, resulting in increased levels of haze and sediment.
When included within fully-formulated oils, products with high levels of n≧2 also confer inferior deposit control properties.
Products with high levels of n=0 confer inferior copper corrosion in fully-formulated oils.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

Preparation of Methylene-Bridged Alkyl Phenol

[0106]A mixture of 95% para-substituted, branched dodecylphenol (1910 g), alkyl benzene sulfonic acid catalyst (19.1 g) and toluene (574 g) was heated to 110° C. over 60 minutes in a 5 L reactor under a blanket of nitrogen gas which remained throughout the reaction process. An aqueous formaldehyde solution (37%, 497 g) was added stepwise over 2 hours and 30 minutes. The temperature was increased to 120° C. and the contents of the reactor maintained at this temperature for 1 hour and 30 minutes. The contents were cooled to 90° C. and an aqueous NaOH solution (50%, 42 g) added over 35 minutes. The contents of the reactor were heated to 130° C. over 25 minutes, kept at this temperature for 2 hours and toluene stripped therefrom by vacuum distillation. The product was an alkylphenol-formaldehyde condensate in the form of a methylene-bridged alkylphenol in which x was from 0 to 22 or more, Mn (by GPC)=1600, Mw=2100, and residual monomer of dod...

example 2

Preparation of Ethoxylated Methylene-Bridged Alkyl Phenol

[0107]Xylene (573 g) was added to Example 1 (2004 g), and then ethylene carbonate (1.02 equivalents per hydroxyl group, 645 g) at 90° C. over 35 minutes. The contents of the reactor were heated to reflux (150-160° C.). The ethylene carbonate was consumed over 4 hours, then xylene was stripped by vacuum distillation. The mixture had a molecular weight, as measured by GPC, of Mn=1700, Mw=2300, and residual monomer of dodecylphenol 13C NMR analysis of the mixture showed that it had the following properties with regard to the parameter n:

nmole %01196≧23

[0108]The temperature was lowered to 110° C. and group I, 150 neutral oil added (2278 g) and mixed for 1 hour to make an ethoxylated methylene-bridged alkylphenol mixture at 50% active ingredient (4556 g).

example 3

[0109]Heavy duty diesel lube oil formulation A was prepared containing ashless dispersant, metal containing detergent, zinc dialkyl dithiophosphate anti-wear agent, supplementary antioxidant, viscosity modifier and flow improver in a base oil. Heavy duty diesel lube oil formulation B (sulfated ash content=1.0%, TBN=12.3) was prepared with the same amount of all the additives except that 1.5 wt % active ingredient of the ethoxylated methylene bridged alkyl phenol mixture of Example 2 was added in place of 1.5 wt % of base oil. The weight ratio of the ashless detergent of Example 2 relative to the metal containing detergents in heavy duty diesel lube oil formulation B was 1.2 on an active ingredient basis.

[0110]Both products were tested in an OM501 LA heavy duty diesel deposit test and the merits produced are compared in Table I.

TABLE IPiston MeritsHeavy duty diesel formulation A21.7Heavy duty diesel formulation B31.4

[0111]Clearly, heavy duty diesel formulation B containing the ashles...

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Abstract

A lubricating oil composition comprising (A) an oil of lubricating viscosity; and, (B) as an additive component, an oil-soluble mixture of oxyalkylated hydrocarbyl phenol condensates wherein the oxyalkyl groups have the formula —(R′O)n— where R′ is an ethylene, a propylene or a butylene group; n is independently from 0 to 10; less than 45 mole % of the phenolic hydroxyl groups in the mixture are not oxyalkylated; and more than 55 mole % of the oxyalkyl groups in the mixture have the formula —R′O— where n is 1.

Description

FIELD OF THE INVENTION[0001]The present invention relates to lubricating oil compositions, more especially to automotive lubricating oil compositions for use in piston engines, especially gasoline (spark-ignited) and diesel (compression-ignited) crankcase lubrication, such compositions being referred to as crankcase lubricants. In particular, although not exclusively, the present invention relates to use of ashless detergent additives with good copper corrosion properties in lubricating oil compositions, where corrosion is a concern.BACKGROUND OF THE INVENTION[0002]A crankcase lubricant is an oil used for general lubrication in an internal combustion engine where an oil sump is situated generally below the crankshaft of the engine and to which circulated oil returns. It is well known to include additives in crankcase lubricants for several purposes.[0003]Among the additives that are and have been commonly included are metal-containing detergents. These are additives that reduce form...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F01M1/02C10M105/18C10M107/34
CPCC10M145/20C10M145/26C10M2209/101C10N2240/10C10M2209/104C10N2230/04C10N2230/12C10M2209/103C10N2030/04C10N2030/12C10N2040/25
Inventor DAMBACHER, JESSE D.BERA, TUSHAR K.SKINNER, PHILIPEMERT, JACOBSEVERT, RICHARD J.MARSH, ADAM P.
Owner DAMBACHER JESSE D
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