Lubricant composition and method for improving anti-wear and friction reduction properties of lubricant

A technology of lubricating oil composition and antioxidant, applied in lubricating composition, petroleum industry, additives, etc., can solve problems such as difficulty in starting the engine, unstable idle speed, poor drivability, etc.

Active Publication Date: 2015-09-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Unsaturated olefins, aromatics and a small amount of sulfur-containing compounds in lubricating base oils can easily react with oxygen to form colloids, and eventually form carbon deposits, especially in key parts such as intake valves, pistons, oil pans, and combustion chambers It will

Method used

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  • Lubricant composition and method for improving anti-wear and friction reduction properties of lubricant
  • Lubricant composition and method for improving anti-wear and friction reduction properties of lubricant
  • Lubricant composition and method for improving anti-wear and friction reduction properties of lubricant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0145] Embodiment 1 synthetic polyisobutylene o-cresol

[0146] In a 500ml four-necked flask equipped with a stirrer, a thermometer, a condenser and a dropping funnel, add 34.93g (0.323mol) of o-cresol, 6.88g (0.048mol) of boron trifluoride ether catalyst, and 100ml of n-hexane solvent React with 161.61g (0.162mol) of polyisobutylene (Mn=1000) at 80°C for 2h. After the reaction, the reaction mixture was washed once with 5% potassium hydroxide solution by mass fraction, and washed with hot water to neutrality to remove the catalyst, and then the solvent and unreacted o-cresol were distilled off under reduced pressure. The hydroxyl value of the synthetic product polyisobutylene o-cresol is 53.49 mg / g. For the determination of hydroxyl value, refer to the acetic anhydride method in GB / T7383-2007.

[0147] An example reaction is as follows:

[0148]

Embodiment 2

[0150] The polyisobutylene o-cresol 47.16g (0.045mol) that makes in embodiment 1 is added in the 500ml four-necked beaker that stirrer, thermometer and separator are equipped with under nitrogen protection, then add 2.70g (0.045mol) ethylenediamine, 3.83g (0.047mol) of formaldehyde, and 47ml of toluene was added as a reaction solvent, and after reacting at 80°C for 1.5h, the temperature was lowered to room temperature, and 4.17g (0.0225mol) of p-hydroxydiphenylamine, 3.83g ( 0.047mol) formaldehyde, reacted at 70°C for 1h. After the reaction is finished, the solvent and a small amount of water generated are distilled off under reduced pressure to obtain the final Mannich base detergent. An example reaction is as follows:

[0151]

Embodiment 3

[0153] The polyisobutylene o-cresol 53.37g (0.051mol) that makes in embodiment 1 is added in the 500ml four-necked beaker that stirrer, thermometer and separator are equipped with under nitrogen protection, then add 7.46g (0.051mol) triethylenetetramine, 4.38g (0.054mol) of formaldehyde, and 54ml of xylene was added as a reaction solvent, after reacting at 100°C for 1.5h, the temperature was cooled to room temperature, and 5.87g (0.0255mol) of 4-hydroxyl-2'- Nitrodiphenylamine and 4.38g (0.054mol) formaldehyde were reacted at 80°C for 1h. After the reaction is finished, the solvent and a small amount of water generated are distilled off under reduced pressure to obtain the final Mannich base detergent. Refer to Example 2 for an exemplary reaction scheme.

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Abstract

The invention provides a lubricant composition and a method for improving anti-wear and friction reduction properties of a lubricant. The composition contains a Mannich base, an alkyl-naphthalene sulfonate, phenolic ester and/or a thio-phenolic ester antioxidant, alkyl monosulfide phenoxide and lubricant base oil, wherein the Mannich base contains a structural unit (I) and a structural unit (II) shown in the specification, wherein each R1 is same or different and is independently selected from hydrogen, C1-4 straight chain or branched chain alkyl and a single bond respectively; each R' is same or different and is independently selected form hydrogen and C1-6 straight chain or branched chain alkyl respectively; R2 is selected from H, C1-8 alkyl, hydroxyl or nitryl; R3 is selected from C1-6 straight chain or branched chain alkyl; R4 is selected from hydrocarbyl of which the number-average molecular weight Mn is 300-3000; and each y is same or different and is independently selected from an integer from 2 to 5 respectively. The lubricant composition provided by the invention is excellent in clean dispersion property, anti-wear and friction reduction properties and antirust property.

Description

technical field [0001] The invention relates to a lubricating oil composition, in particular to a lubricating oil composition with excellent cleaning and dispersing properties, anti-wear and anti-friction properties, and anti-rust properties. Background technique [0002] Unsaturated olefins, aromatics and a small amount of sulfur-containing compounds in lubricating base oils can easily react with oxygen to form colloids, and eventually form carbon deposits, especially in key parts such as intake valves, pistons, oil pans, and combustion chambers It will accelerate the formation of engine deposits, seriously affect the working performance of the engine, and cause problems such as difficulty in starting the engine, unstable idling speed, poor drivability, poor acceleration, and serious power loss, resulting in unnecessary and expensive maintenance costs. Lubricating oil compositions having detergency properties (deposit formation inhibiting properties) have been produced in t...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10M149/00C10N30/04C10N30/06C10N30/12
Inventor 黄作鑫辛世豪赵敏段庆华么佳耀
Owner CHINA PETROLEUM & CHEM CORP
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