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A kind of lubricating grease and preparation method thereof

A grease, unsubstituted technology, applied in the field of grease and its preparation, can solve the problems of low dropping point, poor susceptibility of metal additives, limited application range, etc., and achieve the effect of good susceptibility

Active Publication Date: 2021-04-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 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, most of them are lower than 200°C, which limits the scope of its application
[0004] 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
[0005] Although the combination of polyurea and high alkali value series grease can improve the performance of high alkali value grease, but the two are physically mixed, and the best effect has not been achieved, and further improvement is needed

Method used

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  • A kind of lubricating grease and preparation method thereof
  • A kind of lubricating grease and preparation method thereof
  • A kind of lubricating grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Raw material components: ultra-high base number calcium sulfonate (total base number 400mgKOH / g, 30kg); 150BS (30kg); naphthenic acid (pure acid number 120mgKOH / g, acid content 70%, 2.8kg); methanol ( 1kg); acetic acid (0.56kg); 12-hydroxystearic acid (5kg); lithium hydroxide monohydrate (0.7kg); diphenylmethane diisocyanate (MDI, 4.16kg); hexamethylenediamine (1.93kg); Dibutyltin (0.25kg); phenylisocyanate (2kg); polyalpha-olefin PAO10 (10kg); diisodecyl sebacate (DDS, 8kg).

[0081] Add 30kg of ultra-high base number calcium sulfonate with a total base value of 400mgKOH / g and 30kg of HVI150BS lubricating base oil (100°C kinematic viscosity) into a 160L atmospheric pressure reactor with heating, stirring, circulation and cooling. 31mm 2 / s, purchased from Karamay Petrochemical Company, the same below), stirred, heated to 80°C, and kept at a constant temperature for 10 minutes; added 2.8kg of naphthenic acid, the temperature was controlled at about 80°C, and stirred fo...

Embodiment 2

[0084] Raw material components: calcium naphthenate with high base value (total base value is 360mgKOH / g, 40kg); 150BS (10kg); dodecylbenzenesulfonic acid (2.8kg); isopropanol (1kg); acetic acid (0.56 kg); Ca(OH) 2 (0.25kg); 12-hydroxystearic acid (2kg); diphenylmethane diisocyanate (MDI, 1.67kg); n-octylamine (0.86kg); tripropylamine (0.2kg); 500SN (16kg).

[0085] Add 40kg of high basic value calcium naphthenate with a total base value of 360mgKOH / g and 10kg of HVI150BS lubricating base oil into a 160L atmospheric pressure reactor A with heating, stirring, circulation and cooling, stirring, heating Warm up to 50°C, keep the temperature constant for 10 minutes; add 2.8kg of dodecylbenzenesulfonic acid, control the temperature at about 50°C, and stir for 10 minutes; add 1kg of isopropanol, stir for 10 minutes; add 0.56kg of acetic acid and 2.24kg of water , stirred for 10 minutes; heated to 95 ℃, constant temperature for 90 minutes, the material thickened into a fat.

[0086...

Embodiment 3

[0091] Raw material components: ultra-high base number sulfurized alkyl phenol calcium (total base number 420mgKOH / g, 22kg); high base number calcium oleate (total base number 360mgKOH / g, 8kg); HVI150BS lubricating base oil (100 ℃ Kinematic viscosity of 31mm 2 / s, 30kg); 4-octadecylphenol (2.8kg); acetic acid (0.56kg); calcium hydroxide (1.8kg); 12-hydroxystearic acid (2kg); terephthalic acid (3.5kg) ; Aluminum triisopropoxide (2.41kg); Stearic acid (2.8kg); Benzoic acid (1.2kg); 4# ethyl silicone oil (10kg). Diphenylmethane diisocyanate (MDI, 1.67kg); ethylenediamine (0.4kg); tolyl diisocyanate (TDI, 1.16kg); octadecylamine (1.79kg); potassium carbonate (0.1kg);

[0092] In a 160L atmospheric pressure reactor with heating, stirring, circulation and cooling, add 22kg of ultra-high base number sulfurized alkyl phenol calcium with a total base number of 420mgKOH / g, 8kg of a total base number of 360mgKOH / g High base number calcium oleate and 30kg HVI150BS lubricating base oil, ...

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Abstract

The invention relates to the field of lubricants, and discloses a lubricating grease and a preparation method thereof. The lubricating grease contains base oil, at least one compound represented by formula I, non-Newtonian perbase calcium, and optionally a salt of a small molecular acid. The invention also discloses a method for preparing the lubricating grease, which includes: mixing and heating Newtonian high alkali value calcium, a conversion agent and the first part of base oil to thicken the material; mixing the obtained product with hydroxy fatty acid, optional small molecule acid Mixing with the metal source for saponification reaction, and then selectively dehydrating the product obtained by the saponification reaction, and obtaining a compound with one or more -NHCONH-structure groups under the selective presence of the catalyst; and then carrying out the obtained product Refined and blended with the balance of base oil and optional additives. The invention also discloses the lubricating grease prepared by the method. The lubricating grease of the invention has excellent comprehensive properties and can be widely used in various industries.

Description

technical field [0001] The present invention relates to the field of lubricants, in particular, to a lubricating grease and a preparation method thereof. Background technique [0002] Because of its excellent high and low temperature performance, mechanical stability, colloidal stability, oxidation stability, water resistance, corrosion resistance and rust and wear resistance, it has been put into the market since calcium sulfonate with high base number is used as raw material to produce lubricating grease. , causing widespread concern in the grease industry at home and abroad. CN102417855A etc. introduced polyurea into calcium sulfonate to improve the lubricating life. CN103695137A etc. disclose that high-base-value calcium naphthenate grease with equally excellent comprehensive performance and more environmental protection can be prepared by using high-base value calcium naphthenate as a raw material. CN103571588A et al. introduced polyurea into calcium naphthenate, whic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M115/08C07C273/18C07C275/40C10N30/08C10N40/02C10N30/12C10N50/10
CPCC07C273/1827C10M115/08C10M2207/16C10M2215/1026C10M2219/046C10M2219/087C10N2030/08C10N2030/12C10N2040/02C10N2050/10C10N2030/26C07C275/40C10N2010/04
Inventor 何懿峰郑会孙洪伟段庆华白文娟李华姚立丹杨海宁
Owner CHINA PETROLEUM & CHEM CORP