Polymer-based lubricating grease and preparation method thereof

A technology of base lubricating grease and lubricating base oil, which is applied in the field of polymer base lubricating grease and its preparation, which can solve the problems of insignificant improvement of lubricating grease PB value, damage and enlargement of lubricating grease structure, and achieve excellent anti-rust and anti-corrosion properties , improve the PB value, the effect of excellent comprehensive 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

[0004] The extreme pressure and anti-wear agents in the prior art have obvious damage to the structure of the grease, and the penetration usually becomes larger after being added, while the solid additives that have little influence on the penetration do not significantly improve the PB value of the grease

Method used

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  • Polymer-based lubricating grease and preparation method thereof
  • Polymer-based lubricating grease and preparation method thereof
  • Polymer-based lubricating grease and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0044] 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 polymer-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.

[0045] 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 the base 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.

[0046] According to the present inv...

Embodiment approach

[0051] According to a specific embodiment of the present invention, ZrO(NO 3 ) 2 ·nH 2 In O, n=2.

[0052] According to a specific embodiment of the present invention, ZrOSO 4 ·nH 2 In O, n=1.

[0053] 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 the 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.

[0054] According to a specific embodiment of the present invention, Zr(NO 3 ) 4 ·nH 2 In O, n=5.

[0055] According to a specific embodiment of the present invention, Zr(SO 4 ) 2 ·nH 2 In O, n=4.

[0056] According to the present invention, Zr(NO 3 ) 4 ·nH 2 O and Zr(SO 4 ) 2 ·nH 2 The to...

specific Embodiment approach

[0096] According to the second aspect of the present invention, preferably, according to a specific embodiment of the present invention, the alkoxy compound Zr(OR) of zirconium is added 4 The timing is at the beginning of mixing the polyurea compound and / or polyolefin with part of the base oil or during the mixing process, the temperature at which it reacts with water is the temperature at which the polyurea compound and / or polyolefin is mixed with part of the base oil, For example, at 80-120°C, preferably 95-110°C, the reaction time is 0.2-3h, preferably 0.5-2h; zirconium alkoxide Zr(OR) 4 The molar ratio to water is 1:4-20; preferably, the reaction is carried out under stirring.

[0097] According to the second aspect of the present invention, preferably, according to a specific embodiment of the present invention, the alkoxy compound Zr(OR) of zirconium is added 4 The timing is that after mixing the polyurea compound and / or polyolefin with part of the base oil, the reactio...

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Abstract

The invention relates to the field of lubricating grease, the invention discloses polymer-based lubricating grease and a preparation method thereof. Taking the weight of the polymer-based lubricatinggrease as a reference, the polymer-based lubricating grease comprises the following components, 50-95% by weight of a lubricating base oil, 0.5-49% by weight of a polymer-based thickening agent, and 1-20% by weight of a zirconium hydroxide additive, wherein the zirconium hydroxide additive 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. Thepolymer-based lubricating grease provided by the invention contains nano-scale zirconium hydroxide additives, so that the PB value of the metal soap-based lubricating grease can be remarkably increased, meanwhile, the influence on the consistency of the lubricating grease is small, and the preparation method is simple and convenient.

Description

technical field [0001] The invention relates to lubricating grease, in particular to a polymer-based lubricating grease and a preparation method thereof. Background technique [0002] Polymer-based grease is a type of grease containing polyurea grease and polymer as a thickener. It is characterized by long service life, but it also has the problem of poor sensitivity to additives, especially extreme pressure and anti-wear agents. For example, the common extreme pressure anti-wear agent has obvious damage to the colloidal structure of polyurea grease. Adding a small amount will make the grease significantly thinner and shorten the service life. It has a catalytic oxidation effect, especially at high temperature, which accelerates the oil oxidation process and shortens the service life. These problems restrict its wide application and urgently need to be solved. [0003] As a transition metal element, zirconium is located in group IVB of the fifth period of the periodic table...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10N30/10C10N30/12C10N30/04
CPCC10M169/048C10M2217/0456C10M2205/0225C10M2229/025C10M2207/401C10M2201/0626C10M2207/126C10M2207/128C10M2207/289C10M2209/104
Inventor 何懿峰刘欣阳孙洪伟段庆华刘中其郑会庄敏阳刘伟
Owner CHINA PETROLEUM & CHEM CORP
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