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Composite calcium-based lubricating grease and preparation method thereof

A complex calcium-based grease, a complex calcium-based technology, applied in the field of grease, can solve the problems of hardening of complex calcium-based grease, poor comprehensive performance of calcium-based polyurea grease, limited promotion and application, etc., so as to improve PB value, improve the hardening problem, the effect of excellent overall performance

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

AI Technical Summary

Problems solved by technology

[0002] Complex calcium-based grease is a complex soap-based grease developed earlier. It is a grease product made of complex calcium soap thickened base oil made of fatty acid calcium soap and low-molecular acid calcium salt. It has a high High temperature resistance, excellent water resistance, mechanical stability, colloidal stability and extreme pressure, it is a kind of high-quality lubricating grease with a wide range of uses, but due to the hardening problem of complex calcium-based lubricating grease during storage and use, Greatly limit its promotion and application
In the literature, its performance is improved by introducing polyurea grease, for example, CN1364859A and CN1657599A disclose respectively the calcium-based polyurea grease obtained by introducing dipolyurea in complex calcium-based grease, however, these Calcium-based polyurea grease has poor overall performance

Method used

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  • Composite calcium-based lubricating grease and preparation method thereof

Examples

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preparation example Construction

[0025] According to the present invention, the ZrO(OH) 2 Hydrates of are commercially available and can also be prepared. Preferably, in order to further improve the overall performance of the complex calcium-based grease, the ZrO(OH) 2 The hydrate is wet zirconium hydroxide, and the preparation method includes: ZrOX 2 ·nH 2 O and / or ZrO(NO 3 ) 2 ·nH 2 O and / or ZrOSO 4 ·nH 2 O reacts with base contact, X is F, Cl, Br or I.

[0026] According to the present invention, the ZrOX 2 ·nH 2 O and / or ZrO(NO 3 ) 2 ·nH 2 O and / or ZrOSO 4 ·nH 2 The conditions of the contact reaction between O and alkali generally include the temperature of the contact reaction and the time of the contact reaction. The temperature of the contact reaction can be 10-100° C., preferably 40-80° C., and the time of the contact reaction can be appropriately selected according to the temperature of the contact reaction. Generally, it can be 0.5-3h, preferably 1-2h.

[0027] According to the prese...

Embodiment approach

[0032] According to a specific embodiment of the present invention, ZrO(NO 3 ) 2 ·nH 2 In O, n=2.

[0033] According to a specific embodiment of the present invention, ZrOSO 4 ·nH 2 In O, n=1.

[0034] According to the present invention, ZrOX 2 ·nH 2 O and / or ZrO(NO 3 ) 2 ·nH 2 O and / or ZrOSO 4 ·nH 2 The molar ratio of the total amount of O to alkali is generally stoichiometric ratio, but, in order to react more fully, the molar number of alkali can be excessive such as 1-5%, therefore, under the preferred situation, ZrOX 2 ·nH 2 O, ZrO(NO 3 ) 2 ·nH 2 O and ZrOSO 4 ·nH 2 The total amount of O and the OH contained in the base - The molar ratio is 1:2-2.1.

[0035] According to a specific embodiment of the present invention, Zr(NO 3 ) 4 ·nH 2 In O, n=5.

[0036] According to a specific embodiment of the present invention, Zr(SO 4 ) 2 ·nH 2 In O, n=4.

[0037] According to the present invention, Zr(NO 3 ) 4 ·nH 2 O and Zr(SO 4 ) 2 ·nH 2 The mol ra...

specific Embodiment approach

[0066] According to a specific embodiment of the present invention, the alkoxy compound Zr(OR) of zirconium is added 4 The timing of the saponification reaction can also be during the saponification reaction when the saponification reaction begins. -3h, preferably 0.5-2h. Among them, zirconium alkoxide Zr(OR) 4 The molar ratio to water is 1:4-20; preferably, the reaction is carried out under stirring.

[0067] According to a specific embodiment of the present invention, the alkoxy compound Zr(OR) of zirconium is added 4 The timing may be that after the saponification reaction is completed, the reaction temperature with water is 10-140°C, preferably 70-110°C, and the reaction time is 0.2-3h, preferably 0.5-2h. Among them, zirconium alkoxide Zr(OR) 4 The molar ratio to water is 1:4-20; preferably, the reaction is carried out under stirring.

[0068] According to the present invention, the saponification reaction needs to be carried out in the presence of water. The present ...

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Abstract

The invention relates to the field of lubricating grease, and discloses a composite calcium-based lubricating grease and a preparation method thereof. Taking the weight of the composite calcium-basedlubricating grease as a reference, the composite calcium-based lubricating grease comprises the following components, 50 to 95 wt% of a lubricating base oil, 0.5 to 35 wt% of a composite calcium thickening agent and 1 to 20 wt% of a hydroxide additive of zirconium, wherein the hydroxide additive of zirconium is obtained by refining at least one of products obtained by reacting ZrO(OH)2 hydrate, Zr(OH)4, Zr(OH)4 hydrate and zirconium alkoxy compound Zr(OR)4 with water at a refining temperature; in the zirconium alkoxy compound Zr (OR)4, R is independently selected from C1-C12 alkyl, C5-C12 cycloalkyl or aryl. The novel composite calcium-based lubricating grease provided by the invention contains a nano-scale zirconium hydroxide additive, can improve the hardening problem of composite calcium-based grease, is obviously different from a common extreme pressure anti-wear agent in structural damage to lubricating grease, can significantly improve the PB value, has little influence on the consistency of the lubricating grease, and has excellent comprehensive properties.

Description

technical field [0001] The invention relates to lubricating grease, in particular to a composite calcium-based lubricating grease and a preparation method thereof. Background technique [0002] Complex calcium-based grease is a complex soap-based grease developed earlier. It is a grease product made of complex calcium soap thickened base oil made of fatty acid calcium soap and low-molecular acid calcium salt. It has a high High temperature resistance, excellent water resistance, mechanical stability, colloidal stability and extreme pressure, it is a kind of high-quality lubricating grease with a wide range of uses, but due to the hardening problem of complex calcium-based lubricating grease during storage and use, It greatly limits its popularization and application. In the literature, its performance is improved by introducing polyurea grease, for example, CN1364859A and CN1657599A disclose respectively the calcium-based polyurea grease obtained by introducing dipolyurea i...

Claims

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Application Information

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IPC IPC(8): C10M125/10C10M177/00C10N50/10C10N30/06
CPCC10M125/10C10M177/00
Inventor 何懿峰庄敏阳孙洪伟段庆华刘中其郑会刘欣阳刘伟
Owner CHINA PETROLEUM & CHEM CORP
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