Soap urethane lubricating grease and preparation method thereof

A technology of soap urethane and lubricating grease, applied in the field of soap urethane grease and its preparation, can solve the problems of insufficient mechanical stability and high dropping point

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

The grease containing monourethane is characterized by a high dropping point, mostly higher than 250°C, good thermal stability, and long life. The disadvantage is that the mechanical stability is still not good enough, and the sensitivity to metal additives can be further improved. improve

Method used

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  • Soap urethane lubricating grease and preparation method thereof
  • Soap urethane lubricating grease and preparation method thereof
  • Soap urethane lubricating grease and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0060] 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 soap urethane 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.

[0061] 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.

[0062] According to the present invention...

Embodiment approach

[0067] According to a specific embodiment of the present invention, ZrO(NO 3 ) 2 ·nH 2 In O, n=2.

[0068] According to a specific embodiment of the present invention, ZrOSO 4 ·nH 2 In O, n=1.

[0069] 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.

[0070] According to a specific embodiment of the present invention, Zr(NO 3 ) 4 ·nH 2 In O, n=5.

[0071] According to a specific embodiment of the present invention, Zr(SO 4 ) 2 ·nH 2 In O, n=4.

[0072] 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

[0147]According to a specific embodiment of the third aspect of the present invention, the preparation method of soap urethane monourea grease comprises:

[0148] (1) Mix and heat part of the lubricating base oil and higher fatty acid, raise the temperature to 70-100°C, add oxides and / or hydroxides of alkali metals and / or alkaline earth metals, and carry out saponification reaction;

[0149] (2) in the presence of a catalyst, the reaction mixture obtained in step (1) is reacted with a diisocyanate;

[0150] (3) Mixing and reacting the reaction mixture obtained in step (2) with the monoamine;

[0151] In any step of steps (1)-(3) or in the reaction mixture obtained in step (3), in the presence of optional water, add a compound selected from ZrO(OH) 2 Hydrate, Zr(OH) 4 , Zr(OH) 4 Hydrates and zirconium alkoxylates Zr(OR) 4 at least one of;

[0152] Heating the final reaction mixture to 140-230°C for constant-temperature refining; adding the rest of the lubricating base oil,...

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Abstract

The invention relates to the field of lubricating grease, the invention discloses soap urethane lubricating grease and a preparation method thereof. Taking the weight amount of the soap urethane lubricating grease as a reference, the soap urethane lubricating grease comprises the following components, 50 to 95wt% of a lubricating base oil, 0.5 to 30wt% of a soap urethane thickener, and 1 to 20wt%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. The soap urethane lubricating grease provided by the invention contains the hydroxide additive of multifunctional nano zirconium, so that the PB value of the soap urethane lubricating grease can be remarkably improved,the influence on the consistency of lubricating grease is small, and the soap urethane lubricating grease can be well compatible with a thickening agent, so that the obtained soap urethane lubricatinggrease has good comprehensive performance.

Description

technical field [0001] The invention relates to lubricating grease, in particular to a soap urethane lubricating grease 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 of its good comprehensive performance and is widely used in various industries, but its disadvantages But the dropping point is not high, most of them are lower than 200°C, which limits the scope of its application. [0003] Soap urethane grease is a grease containing monourethane, and preferably also contains urea, that is, monourethane urea grease. The molecular structure of monourethane grease contains —O—CO—NH—functional group, monourethane urea lubrication The lipid molecular structure contains —O—CO—NH—CO—NH—functional group, which contains both monourethane group and urea group. According to the number of urea group functional grou...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10N30/02C10N30/12C10N30/08
CPCC10M169/045C10M2215/14C10M2207/401C10M2205/0225C10M2229/025C10M2201/0626C10M2207/126C10M2207/128C10M2207/289C10M2209/104
Inventor 何懿峰刘中其孙洪伟段庆华郑会庄敏阳刘欣阳刘伟
Owner CHINA PETROLEUM & CHEM CORP
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