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Lubricating grease and preparation method thereof

A technology of lubricating grease and low-grade fatty acid, applied in the field of lubricating grease and its preparation, can solve the problems of poor mechanical stability and poor susceptibility of metal additives, and achieve the effect of good susceptibility

Active Publication Date: 2018-05-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The thickener in urea-based grease is named for its molecular structure containing -NH-CO-NH-urea functional group structure. According to the number of urea functional groups, it can be divided into diurea grease (the most common), triurea Grease, tetraurea grease, hexurea grease, octaurea grease, etc. The disadvantages are poor mechanical stability and poor susceptibility to metal additives

Method used

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  • Lubricating grease and preparation method thereof
  • Lubricating grease and preparation method thereof
  • Lubricating grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Raw material components: 12-hydroxystearic acid (10kg); Sebacic acid (5.38kg); Lithium hydroxide monohydrate (3.7kg); Diphenylmethane diisocyanate (MDI, 8.33kg); n-octylamine (4.3 kg); Tripropylamine (1kg); 500SN (100kg).

[0071] (a) Preparation of thickener: Add 70kg of 500SN base oil (100°C kinematic viscosity is 11mm 2 / s, purchased from Sinopec Yanshan Petrochemical Company, the same below), 10kg of 12-hydroxystearic acid and 5.38kg of sebacic acid, stirred, heated up to 80 ° C, at this time, 3.7kg of monohydrate lithium hydroxide and 5kg Slowly add water to it, heat up to 105°C for saponification for 2 hours, then heat up to 115°C, add 8.33kg of MDI and 1kg of catalyst (tripropylamine), react for 30min, add 4.3kg of n-octylamine, react for 30min, and the obtained product is obtained as thick The oxidizing agent is used in step (b), the product is dissolved in sherwood oil, filtered, and the filter residue is washed 3 times with sherwood oil, and the filter residu...

Embodiment 2

[0076] Raw material components: 12-hydroxystearic acid (5kg); acetic acid (6.99kg); calcium hydroxide (4.93kg); diphenylmethane diisocyanate (MDI, 4.16kg); hexamethylenediamine (1.93kg); Butyl tin (0.5 kg); phenyl isocyanate (1.98 kg); polyalphaolefin PAO10 (200 kg); diisodecyl sebacate (DDS, 80 kg).

[0077] (a) Preparation of thickener: Add 100kg of PAO10 oil (100°C kinematic viscosity 10mm 2 / s, purchased from Exxon Mobil Corporation), 5kg of 12-hydroxystearic acid, stirred, and became a homogeneous system after the temperature was raised to 95°C.

[0078] In another container B, slowly add 4.93kg of calcium hydroxide to 5kg of water, stir evenly, add 6.99kg of acetic acid, react for 30min and set aside.

[0079] Slowly add the material in container B to reactor A, react for 1 hour, heat up to 100°C, drain water and saponify for 1 hour, then heat up to 150°C, add 100kg of PAO10 and cool down to 90°C, add 4.16kg of MDI and 0.5kg of dibutyltin, After reacting for 60 minutes...

Embodiment 3

[0084] Raw material components: 12-hydroxystearic acid (10kg); Benzoic acid (2kg); Sodium hydroxide (2kg); Diphenylmethane diisocyanate (MDI, 8.33kg); Ethylenediamine (2kg); Isocyanate (TDI, 5.8kg); Octadecylamine (8.97kg); Potassium Carbonate (0.1kg); Methyl Silicone Oil (70kg); 150BS (30kg).

[0085] (a) Preparation of thickener: Add 70kg of methyl silicone oil (201-100, 25°C kinematic viscosity is 100mm 2 / s, purchased from Beijing Zhongding Huaxin Industry and Trade Co., Ltd.), 10kg of 12-hydroxystearic acid and 2kg of benzoic acid, stirred, and the temperature was raised to 90 ° C. At this time, 2kg 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, add 2kg of ethylenediamine, react for 30min, add 5.8kg of TDI, react for 30min, Then add 8.97kg of octadecylamine, react for 30min, the product obtained is used in ...

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Abstract

The invention relates to the field of lubricants, and discloses lubricating grease and a preparation method thereof, wherein the lubricating grease contains base oil and a thickening agent, and the thickening agent comprises the salt of a small molecule acid, and at least a compound represented by a formula I. The lubricating grease preparation method comprises: mixing a thickening agent and partial base oil, refining, and mixing with the balance of base oil and an optional additive; or mixing a hydroxy fatty acid, a molecule acid, partial base oil and a metal source, carrying out a saponification reaction, and carrying out selective heating dewatering on the product obtained from the saponification reaction; carrying out a reaction on the obtained product, polyisocyanate, an amine and optionally additional isocyanate; and refining the obtained product, and mixing the balance of base oil and an optional additive. According to the present invention, the substance obtained by chemicallycombining soap base grease and polyurea grease through the hydroxyl is used as the thickening agent component, such that the lubricating grease with advantages of excellent high-temperature performance, excellent mechanical stability and good susceptibility to metal additives can be obtained. The formula I is defined in the specification.

Description

technical field [0001] The invention relates to the field of lubricants, in particular to a 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 drop The temperature is not high, mostly lower than 200°C, which limits the scope of its application. Complex soap base grease is a kind of high dropping point grease. The dropping point is generally higher than 250°C. It can be used under high temperature conditions, but many properties such as colloidal stability, mechanical stability, service life, etc. are not as good as lithium base grease. [0003] The thickener in urea-based grease is named for its molecular structure containing -NH-CO-NH-urea functional group structure. According to the number of urea ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/02C10M123/02C10N50/10
CPCC10M123/02C10M169/02C10M2203/1006C10M2207/1225C10M2207/1236C10M2207/1276C10M2207/1415C10M2207/1426C10M2215/1026C10N2030/08C10N2050/10
Inventor 何懿峰翟浩川张建荣孙洪伟段庆华郑会
Owner CHINA PETROLEUM & CHEM CORP