Antioxidant for hydraulic cylinder and preparation and application thereof

An antioxidant, hydraulic oil technology, used in additives, petroleum industry, lubricating compositions, etc., to achieve the effect of improving long-term high temperature antioxidant stability and excellent high temperature antioxidant stability

Active Publication Date: 2010-08-25
上海海都化学科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used oil antioxidants include free radical chain terminators, such as phenols and amine compounds; peroxide decomposers, such as

Method used

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  • Antioxidant for hydraulic cylinder and preparation and application thereof
  • Antioxidant for hydraulic cylinder and preparation and application thereof
  • Antioxidant for hydraulic cylinder and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

Example 1 Antioxidant preparation

The antioxidant is prepared according to the formula in parts by weight in Table 1.

Preparation method: Mix the raw materials evenly according to the proportion.

Table 1

The structural formula of thiocarbamate in Table 1 is (C4H9)2NCS2CS2CN(C4H9)2.

Example Embodiment

Example 2 Antioxidant performance

Adopt neopentyl polyol dibasic acid complex ester (1# formula in Example 3) as the base oil and mix with various antioxidants in the table below, wherein the base oil accounts for 98wt%, and the antioxidant The total amount is 2wt%. Mix the raw materials according to the proportion and stir evenly.

Table 2

Note: The total amount of antioxidants is 2.0%, and the structural formula of thiocarbamate is (C4H9)2NCS2CS2CN(C4H9)2.

It can be seen from the data in Table 2 that the present invention selects an antioxidant compounded by diisooctyl diphenylamine, phenyl-α-naphthylamine, 2,6 di-tert-butylphenol and thiocarbamate It achieves the complementary performance advantages of various antioxidants and greatly improves the long-term high temperature oxidation stability of oil products.

Example Embodiment

Example 3 Preparation of neopentyl polyol dibasic acid double ester

The preparation process is as follows:

1. Choose a dibasic acid with carbon number of 5-12, add a mixed alcohol composed of neopentyl glycol, trimethylolpropane and neopentyl erythritol in an amount twice the amount of the dibasic acid, and then add the substance The amount of the mixed dibasic acid is 0.95-1.05% of tetraoctyl zirconate and 1.9-2.1% of p-toluenesulfonic acid as a catalyst. The reaction is stirred for 140-180 minutes at a temperature of 160-180°C to complete the first step. Esterification reaction.

2. The amount of the added substance is 4 times of the mixed dibasic acid and the monobasic fatty acid with carbon number of 14 to 20, (the monobasic fatty acid should be excessive in order to complete the second step of esterification), at a temperature of 200-220 ℃ The reaction is stirred for 100-120 minutes to complete the second step of esterification reaction.

3. The reaction product is subjec...

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Abstract

The invention provides an antioxidant for a hydraulic cylinder, which comprises the following components in part by weight: 4 to 10 parts of diisooctyl diphenylamine, 4 to 10 parts of phenyl-alpha-naphthylamine, 5 to 10 parts of 2,6-di-tert-butyl phenol and 6 to 15 parts of thiocarbamate. The antioxidant is prepared by researching the synergistic effect among the antioxidant, a main antioxidant and an antioxidant additive, and compounding the diisooctyl diphenylamine, the phenyl-alpha-naphthylamine, the 2,6-di-tert-butyl phenol and the thiocarbamate, achieves the complementary performance advantages of a plurality of types of antioxidants, and greatly improves the long-term high-temperature antioxidant stability of oil products.

Description

A kind of antioxidant for hydraulic oil and its preparation and application technical field The invention relates to an antioxidant for hydraulic oil and its preparation and application, belonging to the technical field of industrial lubricating oil. Background technique Hydraulic machinery has been widely used in industries such as iron and steel, electric power, coal and machinery. As a power medium, hydraulic oil is the key material of hydraulic transmission technology, and it is also one of the three important oil products with the largest consumption of industrial lubricating oil. With the continuous development of modern hydraulic technology, some hydraulic systems often work under high-pressure and high-temperature conditions (for example, the hydraulic system of a steel plant is often in contact with high-temperature bodies or even open flames, and the hydraulic system of a power plant is often in contact with high-temperature steam). The thermal stability and oxi...

Claims

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Application Information

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IPC IPC(8): C10M141/08C10M161/00C10N40/32C10N40/08C10N30/10C10N30/08
Inventor 王鹏汪宪臣姜作泰
Owner 上海海都化学科技有限公司
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