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Perfluor high-temperature lubricating grease

A lubricating grease and high temperature technology, applied in the direction of lubricating composition, petroleum industry, etc., can solve problems such as unstable distribution rate, easy damage, general extreme pressure performance, etc.

Inactive Publication Date: 2012-09-19
上海相推环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing ordinary high-temperature lubricating grease is increasingly unable to meet the needs of the equipment. Even if the perfluoropolyether lubricating grease thickened with PTFE is used, the thickener will polymerize at a high temperature above 280°C and produce toxic Gas, which greatly affects the service life
In addition, ordinary high-temperature lubricating grease has average extreme pressure performance. Even if carbon black thickened perfluoropolyether oil is used, the chain structure of carbon black is easily damaged, and the separation rate becomes very unstable; ordinary lubricating grease is not easy to use under vacuum conditions. , the use temperature is also limited within 300°C

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Raw material: base oil 45kg, thickener 15kg, additive 40kg. in:

[0019] Base oil: a mixture of 30kg perfluoropolyether oil and 15kg perfluorocarbon oil;

[0020] Thickener: a mixture of polytetrafluoroethylene 5kg, silicon dioxide 2kg, titanium dioxide 2kg, molybdenum disulfide 2kg, rare earth fluoride 2kg, nano-graphite 2kg;

[0021] Additive: a mixture of 25kg of phosphocyanide and 15kg of antimony trioxide.

[0022] The kinematic viscosity of the base oil at 40°C is 100-600m 2 / s, the molecular weight is between 4000 and 10000.

[0023] The fineness of the thickener is 10nm~0.1μm.

[0024] (2) Preparation: first add 18kg of the required base oil into the stirred reactor, raise the temperature to 90°C, then add 15kg of the required thickener, raise the temperature to 110°C, stir for 2 hours, then slowly add the remaining base oil, and cool down to Stir at 80°C for 1 hour, then cool down to 50°C and add 40kg of additives, stir evenly and take it out, spread t...

Embodiment 2

[0026] (1) Raw material: base oil 60kg, thickener 35kg, additive 5kg. in:

[0027] Base oil: a mixture of 30kg perfluoroester oil and 15kg perfluorocarbon oil;

[0028] Thickener: a mixture of 20kg perfluoroethylene propylene copolymer, 4kg fluorocarbon wax, 2kg carbon black, 2kg rare earth fluoride, 2kg nano graphite, 2kg fluorinated graphite, and 3kg fluorinated resin;

[0029] Additive: a mixture of sodium sebacate 4kg and sodium suberate 1kg.

[0030] The kinematic viscosity of the base oil at 40°C is 100-600m 2 / s, the molecular weight is between 4000 and 10000.

[0031] The fineness of the thickener is 10nm~0.1μm.

[0032] (2) Preparation: First, add 24kg of the required base oil into the stirred reactor, raise the temperature to 90°C, then add 35kg of the required thickener, raise the temperature to 120°C, stir for 2 hours, then slowly add the remaining base oil, and cool down to Stir at 80°C for 1 hour, then lower the temperature to 50°C, add 5kg of additives, sti...

Embodiment 3

[0034] (1) Raw material: base oil 75kg, thickener 5kg, additive 20kg. in:

[0035] Base oil: perfluoropolyether oil 75kg;

[0036] Thickener: PTFE 2kg, fluorinated resin 3kg;

[0037] Additive: a mixture of phosphocyanide 10kg, sodium sebacate 5kg, and sodium suberate 5kg.

[0038] The kinematic viscosity of the base oil at 40°C is 100-600m 2 / s, the molecular weight is between 4000 and 10000.

[0039] The fineness of the thickener is 10nm~0.1μm.

[0040] (2) Preparation: First, add 30kg of the required base oil into the stirred reactor, raise the temperature to 90°C, then add 5kg of the required thickener, raise the temperature to 130°C, stir for 2 hours, then slowly add the remaining base oil, and cool down to Stir at 80°C for 1 hour, then cool down to 50°C and add 20kg of additives, stir evenly and take it out, spread the taken out material on a clean aluminum plate with a thickness of 4mm, put it in an oven and bake it at 200°C for 4 hours, then cool to room temperatu...

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Abstract

The invention discloses perfluor high-temperature lubricating grease, which consists of base oil, thickening agent and additive, wherein the base oil is one or more of perfluor polyether oil, perfluor ester oil and perfluor hydrocarbon oil; the thickening agent is one or more of polytetrafluoroethylene, perfluor ethylene propylene copolymer, fluorocarbon wax, carbon black, silicon dioxide, titanium dioxide, molybdenum disulfide, rare earth fluoride, nano graphite, graphite fluoride and resin fluoride; and the additive is one or more of phosphorus cyanide, sodium dicaprate, sodium dicaprylate and antimony trioxide. The lubricating grease can be used for lubricating for a long term at the temperature of above 300 DEG C, and can also be used for lubricating in severe environments such as high pressure, high vacuum, high load, strong acid and base and strong corrosion.

Description

technical field [0001] The invention relates to a lubricating grease, in particular to a perfluorinated high-temperature lubricating grease, which belongs to the technical field of lubricants. Background technique [0002] Lubricants are mainly lubricating oils and greases. The ingredients are thickeners and additives added to the base oil. Usually, lubricants use different ingredients in different fields, and their most important performance is long-term stability. In recent years, with the high performance of mechanical equipment, the operating temperature of the moving parts of these mechanical equipment has become higher and higher, so the service life and stability of grease are required to be longer and higher. [0003] The existing ordinary high-temperature lubricating grease is increasingly unable to meet the needs of the equipment. Even if the perfluoropolyether lubricating grease thickened with PTFE is used, the thickener will polymerize at a high temperature above...

Claims

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Application Information

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IPC IPC(8): C10M169/06C10N50/10
Inventor 费勇
Owner 上海相推环保科技有限公司
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