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A kind of synthetic high sintering load lubricating grease and its preparation method and application

A grease and load technology, applied in the field of synthetic high sintering load grease and its preparation, can solve the problems affecting the use range of grease

Active Publication Date: 2022-03-01
上海果石实业(集团)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing lithium complex grease has high temperature resistance, good colloidal stability, mechanical stability, chemical stability and low temperature resistance, has excellent water resistance, and can be used on mechanical parts that are wet and in contact with water; but The sintering load (PD value) of complex lithium-based grease generally does not exceed 400kg, which seriously affects the application range of grease

Method used

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  • A kind of synthetic high sintering load lubricating grease and its preparation method and application
  • A kind of synthetic high sintering load lubricating grease and its preparation method and application
  • A kind of synthetic high sintering load lubricating grease and its preparation method and application

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preparation example Construction

[0032] The present invention also provides a preparation method of the high-sintered composite grease described in the above technical solution, comprising the following steps:

[0033] 12-hydroxystearic acid, lithium hydroxide, water and part of the lubricant are first mixed, and dehydration is carried out after the saponification reaction to obtain a saponified liquid; the part of the lubricant accounts for 50% by mass of the lubricant;

[0034] The saponified liquid, dropping point enhancer, residual lubricant and ethylene-propylene rubber are mixed for a second time to obtain a mixture;

[0035] The mixed material is mixed with the extreme pressure agent, diphenylamine and graphite powder for the third time and then degassed to obtain the synthetic high sintering load lubricating grease.

[0036] In the present invention, 12-hydroxystearic acid, lithium hydroxide, water and part of the lubricant are first mixed, dehydrated after the saponification reaction, and saponified ...

Embodiment 1

[0059] Mix 45kg150BS bright stock and 29.6kg polyethylene propylene synthetic oil (HC200) to obtain a lubricant, the viscosity of the lubricant is 2000mm / s at 40°C, and the pour point is -15°C;

[0060] Mix 37.3kg of lubricant and 5.884kg of 12-hydroxystearic acid at 80°C to obtain a transparent solution;

[0061] 0.469kg lithium hydroxide (purity is 100%) is dissolved in 0.469kg water, obtains lithium hydroxide solution;

[0062] The lithium hydroxide solution was added to the transparent solution five times within 0.5 hours, and then saponified at 100°C for 1.5 hours; the saponified product was heated to 150°C for dehydration to obtain a saponified solution; the saponification was detected by phenolphthalein solution Liquid, alkaline;

[0063] Mix the saponification solution with 2kg ethylene propylene rubber, 2.5kg borate (model 7450), and 22.38kg lubricant at 160°C, and then mix it with 14.92kg lubricant at 205°C to obtain a primary mixture;

[0064] After the primary mi...

Embodiment 2

[0067] Mix 38.1kg of 150BS bright stock and 37.5kg of polyethylene propylene synthetic oil (HC200) to obtain a lubricant, the lubricant has a viscosity of 3000mm / s at 40°C and a pour point of -15°C;

[0068] Mix 37.8kg of lubricant and 4.903kg of 12-hydroxystearic acid at 80°C to obtain a transparent solution;

[0069] 0.391kg lithium hydroxide (purity is 100%) is dissolved in 0.391kg water, obtains lithium hydroxide solution;

[0070] The lithium hydroxide solution was added to the transparent solution five times within 0.5 hours, and then saponified at 105°C for 1.8 hours; the saponified product was heated to 150°C for dehydration to obtain a saponified solution; the saponification was detected by phenolphthalein solution Liquid, alkaline;

[0071] Mix the saponified liquid with 2.5kg of ethylene propylene rubber, 2kg of borate (7450 ​​model), and 22.68kg of lubricant at 160°C, and then mix it with 15.12kg of lubricant at 205°C to obtain a primary mixture;

[0072] After t...

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Abstract

The invention belongs to the technical field of lubricating grease, and in particular relates to a synthetic high sintering load lubricating grease and its preparation method and application. The synthetic high sintering load lubricating grease provided by the invention comprises the following components in mass percent: 4-7% thickener, 73-80% lubricant, 3-8% extreme pressure agent, 2-5% dropping point Improving agent, 1-3% ethylene-propylene rubber, 0.3-0.5% diphenylamine, 8-15% graphite powder, the thickener is prepared by saponification reaction of 12-hydroxystearic acid and lithium hydroxide; the lubricating The agent is a mixture of 150BS bright stock and polyethylene propylene synthetic oil; the extreme pressure agent includes sulfurized olefin and calcium petroleum sulfonate. The synthetic high sintering load lubricating grease provided by the invention has higher viscosity and oil film thickness, can bear higher load, and increases the sintering load of the lubricating grease. It can be seen from the results of the examples that the PD value of the synthetic high sintering load grease provided by the present invention can reach 800kg.

Description

technical field [0001] The invention belongs to the technical field of lubricating grease, and in particular relates to a synthetic high sintering load lubricating grease and its preparation method and application. Background technique [0002] Grease is a lubricant often used in the lubrication of sliding parts such as mechanical equipment bearings and gears, and plays an important role in industrial production. For mechanical equipment with high impact load, it is more necessary to use grease to reduce the friction coefficient of sliding parts in mechanical equipment with high impact load, so as to reduce friction resistance, reduce equipment wear and prolong the service life of equipment. [0003] Lithium complex grease came out in 1962 and has become a very important type of grease. The existing lithium complex grease has high temperature resistance, good colloidal stability, mechanical stability, chemical stability and low temperature resistance, has excellent water re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/00C10N50/10C10N30/06C10N30/08C10N30/02
CPCC10M169/00C10M2207/1285C10M2203/1025C10M2205/0225C10M2205/0245C10M2219/022C10M2219/044C10M2201/041C10M2205/022C10M2205/024C10M2215/064
Inventor 刘慎峰蒋和清
Owner 上海果石实业(集团)有限公司
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