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Compound and lubricating grease with anti-oxidation and thickening functions and their preparation method

A compound and grease technology, which is applied in the field of compound and grease and their preparation, can solve the problem of synergistic effect of anti-oxidant and thickener, achieve excellent high-temperature anti-oxidation performance, controllable preparation process, and stable product quality Effect

Active Publication Date: 2020-05-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of these antioxidants can work synergistically with thickeners. Therefore, it is of great practical significance to develop new antioxidants to work synergistically with thickeners.

Method used

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  • Compound and lubricating grease with anti-oxidation and thickening functions and their preparation method
  • Compound and lubricating grease with anti-oxidation and thickening functions and their preparation method
  • Compound and lubricating grease with anti-oxidation and thickening functions and their preparation method

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preparation example Construction

[0040]According to the second aspect of the present invention, various conventional methods can be used to obtain the metal salt of hydroxy fatty acid, for example, it can be obtained by saponifying hydroxy fatty acid with a metal source. According to a preferred embodiment, the preparation method of the metal salt of hydroxy fatty acid comprises: The hydroxy fatty acid and the metal source are mixed for saponification reaction, and then the product obtained by the saponification reaction is selectively heated and dehydrated, and the metal source is a metal oxide, a metal hydroxide and a metal alkoxy compound (such as formazan Oxygenated compounds, ethoxylated compounds, etc.) (with the help of water as a solvent). The general formula of the alkoxy compound can be M n+ (OR - ) n (such as Zr 4+ (OR - ) 4 、Na + (OR) - , Li + (OR) - or Ca 2+ (OR - ) 2 etc.), wherein, R can be C1-C10 alkyl, preferably C2-C6 alkyl, such as methyl, ethyl, n-propyl, n-butyl, tert-butyl,...

Embodiment 1

[0080] (a) Preparation of antioxidant additive: Add 100kg of 150SN (100°C kinematic viscosity is 5.6mm 2 / s, purchased from Sinopec Yanshan Petrochemical Company, the same below), 10kg of 12-hydroxystearic acid, stirred, and became a homogeneous system after being heated up to 80°C. At this time, 1.4kg of lithium hydroxide monohydrate and 5kg of water Add it slowly, heat up to 105°C for saponification for 2 hours, then heat up to 115°C, add 8.33kg of diphenylmethane diisocyanate (MDI) and 1kg of catalyst (tripropylamine), react for 30min, add 1kg of water, and react for 30min, Raise the temperature to 210°C, keep the temperature constant for 10 minutes, add 30kg of 500SN base oil, stir to lower the temperature, homogenize, filter, and degas, take out the kettle to obtain the oil-containing additive, wash and filter with petroleum ether several times, and the product obtained after drying is an antioxidant additive. The product is tested using Fourier transform ion cyclotron re...

Embodiment 2

[0085] (a) Preparation of antioxidant additive: Add 100kg of 150SN (100°C kinematic viscosity is 5.8mm 2 / s, purchased from Sinopec Yanshan Petrochemical Company), 10kg of 12-hydroxystearic acid, 6.8kg of azelaic acid, stirred, and after the temperature was raised to 90°C, 4.05kg of sodium hydroxide and 10kg of water were slowly added thereto, Heat up to 105°C for saponification for 3 hours, then heat up to 120°C, add 8.33kg of MDI and 0.1kg of catalyst (potassium carbonate), react for 2h, then add 2kg of ethylenediamine, after reacting for 30min, add 5.8kg of tolyl diisocyanate ( TDI), react for 30 minutes, then add 2kg of water, react for 30 minutes, then raise the temperature to 180°C, keep the temperature for 10 minutes, cool down to 80°C and grind to obtain an oil-containing additive, wash and filter with petroleum ether several times, and the product obtained after drying is an antioxidant additive . This product is tested using Fourier Transform Ion Cyclotron Resonance...

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Abstract

The present invention relates to the field of lubricants, and discloses a compound with functions of oxygen resistance and thickening, a lubricating grease, and preparation methods of the compound andthe lubricating grease, wherein the compound is represented by a formula I. The compound preparation method comprises: carrying out a reaction on the metal salt of a hydroxy fatty acid and polyisocyanate, and carrying out a reaction on the obtained product and water; or carrying out a reaction on the metal salt of a hydroxy fatty acid, polyisocyanate and diamine, or adding additional polyisocyanate and water, and carrying out a reaction. The invention further discloses the lubricating grease, wherein the thickening agent and / or the oxygen-resistant additive are provided by the compound. The lubricating grease preparation method comprises: preparing the compound according to the compound preparation method; refining the thickening agent; and mixing with the balance of base oil, and an oxygen-resistant additive, wherein the thickening agent and / or the oxygen-resistant additive are provided by the compound. The invention further discloses the lubricating grease prepared through the lubricating grease preparation method. The compound of the present invention has excellent high-temperature oxidation resistance. The formula I is defined in the specification.

Description

technical field [0001] The invention relates to the field of lubricants, in particular to a compound and grease with anti-oxidation and thickening functions and a preparation method thereof. Background technique [0002] Metal soap-based grease, especially 12-hydroxy lithium stearate soap-based grease, is currently the world's largest annual output of a type of grease. Because this type of grease contains metal ions, it is easy to catalyze the oxidation of base oil at high temperature , so it is necessary to add antioxidants to inhibit its catalytic oxidation ability. At present, the main antioxidants used include aromatic amine antioxidants, such as diphenylamine, phenyl-α-naphthylamine and diisooctyl diphenylamine. However, none of these antioxidants can work synergistically with thickeners. Therefore, it is of great practical significance to develop new antioxidants to work synergistically with thickeners. Contents of the invention [0003] The purpose of the present ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C271/28C07C269/02C07C275/40C07C273/18C10M169/00C10N30/10C10N30/08C10N50/10C10N10/02
CPCC07C269/02C07C271/28C07C273/1827C07C275/40C10M169/00C10M2203/1006C10M2207/128C10M2215/10C10M2215/1013C10N2010/02C10N2030/08C10N2030/10C10N2050/10
Inventor 何懿峰翟浩川张建荣孙洪伟段庆华刘中其姜靓郑会
Owner CHINA PETROLEUM & CHEM CORP
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