Antioxidants based on n-(4-anilinophenyl)-amidocarboxylates

A technology of amidocarboxylate and anilinophenyl, which is used in the field of N-amidocarboxylate compounds as anti-oxidant additives for lubricating oil, which can solve metal corrosion, affect the normal operation of machinery, and increase the viscosity of lubricating oil To achieve the effect of controlling the oxidative deterioration of lubricating oil, prolonging the oxidation induction time, and increasing the initial oxidation temperature

Active Publication Date: 2018-08-14
梧州科润润滑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to its composition and working environment, lubricating oil is easy to undergo a series of chemical reactions with oxygen in the air, and through the catalysis of iron, copper and other metal ions, the oxidation reaction will be further intensified, and a large amount of polymer will eventually be produced to cause lubrication. The viscosity of the oil increases, and even produces sludge and deposits, which are not conducive to heat transfer and block the oil passage
At the same time, the acidic substances produced by oxidation will corrode the metal and further promote oxidation, thus affecting the normal operation of the machine

Method used

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  • Antioxidants based on n-(4-anilinophenyl)-amidocarboxylates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] will structure as figure 2 The shown synthetic N-(4-anilinophenyl)-amido butyric acid ethyl ester is dissolved in the lubricating oil base oil trimellitate with the addition ratio of 1% of antioxidant additive as lubricating oil antioxidant, Use differential scanning calorimetry (DSC) to detect the initial oxidation temperature and oxidation induction period of base oil and lubricating oil containing antioxidants, and judge the high temperature oxidation resistance of antioxidants according to the initial oxidation temperature. The length of the oxidation induction period judges the stability of the antioxidant.

[0033] The DSC-Q10 differential scanning calorimeter was used for testing. Dynamic DSC test conditions: nitrogen flow rate 30mL / min, oxygen flow rate 20mL / min, heating rate 20°C / min, record data at 100-400°C. Nitrogen is introduced at the beginning of the test, and when the temperature reaches the set temperature of 100°C, the system automatically switches t...

Embodiment 2

[0036] Such as Figure 5 Shown is the lubricating base oil diester and the lubricating oil dynamic DSC curve containing 1% N-(4-anilinophenyl)-amidobutyric acid ethyl ester, and the test apparatus and test conditions are consistent with embodiment 1. The results show that the initial oxidation temperature of the diester is 204.12°C. After adding N-(4-anilinophenyl)-amidobutyric acid ethyl ester, the initial oxidation temperature of the lubricating oil is 275.47°C, which effectively improves the lubricating oil. Antioxidant properties of oil.

Embodiment 3

[0038] the structural formula as Image 6 The indicated N-(4-anilinophenyl)-amidopropionic acid ethyl ester is added to the lubricating base oil trimellitate in the addition ratio of 1%, and the dynamics of the base oil and the lubricating oil after adding the antioxidant additive are measured. DSC curve, test apparatus and test condition are consistent with the test described in embodiment 1,2. The results show that the initial oxidation temperature of lubricating oil is 272.78℃ after adding N-(4-anilinophenyl)-amidopropionic acid ethyl ester, which effectively improves the anti-oxidation ability of lubricating oil (lubricating base oil metaphenyl The initial oxidation temperature of triester is 243.61°C).

[0039] The test equipment and test conditions of the static DSC are consistent with those in Example 1. The test results show that the oxidation induction time of lubricating oil containing 1% N-(4-anilinophenyl)-amidopropionic acid ethyl ester at 230°C is 19.6min, whil...

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Abstract

The present invention relates to an antioxidant based on N-(4-anilinophenyl)-amide carboxylic acid ester, wherein the antioxidant is characterized in that R1 is selected from alkyl, and R2 is selected from alkyl. According to the present invention, the antioxidant is added in the lubricating oil so as to be used, and can be used within a temperature of 230 DEG C; the initial oxidation temperature of the lubricating oil can be effectively improved with the antioxidant, the oxidation induction time of the lubricating oil can be effectively prolonged during the use process of the antioxidant as the lubricating oil anti-oxidation additive, the antioxidant can be effectively dissolve in the lubricating base oil, the use temperature is high, the maximum temperature is 230 DEG C, and the tribological properties of the lubricating oil are basically not affected; with the application of the antioxidant as the lubricating oil anti-oxidation additive in the lubricating base oil, the lubricating oil oxidation deterioration can be effectively controlled; and with the method of the present invention, the risk of the lubricating oil oxidation deterioration can be effectively reduced, and the service life of the lubricating oil can be prolonged.

Description

technical field [0001] The invention relates to lubricating oil antioxidant additives, in particular to N-(4-anilinophenyl)-amide carboxylate compounds used as lubricating oil antioxidant additives to improve the antioxidant performance of lubricating oils. Background technique [0002] Due to its composition and working environment, lubricating oil is easy to undergo a series of chemical reactions with oxygen in the air, and through the catalysis of iron, copper and other metal ions, the oxidation reaction will be further intensified, and a large amount of polymer will eventually be produced to cause lubrication. The viscosity of the oil increases, and even produces sludge and deposits, which are not conducive to heat transfer and block the oil passage. At the same time, the acidic substances produced by oxidation will corrode the metal and further promote oxidation, thus affecting the normal operation of the machine. Therefore, in order to extend the service life of lubri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M133/16C10N30/10
Inventor 高新蕾王越
Owner 梧州科润润滑科技有限公司
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