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CN-122012157-A - Lubricating grease and preparation method and application thereof

CN122012157ACN 122012157 ACN122012157 ACN 122012157ACN-122012157-A

Abstract

The invention provides lubricating grease, a preparation method and application thereof, wherein the lubricating grease comprises, by weight, 65-85 parts of base oil, 8-15 parts of a thickening agent, 5-15 parts of an antiwear friction reducer, 0.5-5 parts of an antioxidant and 0.5-5 parts of an antirust agent, and the base oil is at least one of dimethyl silicone oil and modified silicone oil. The lubricating grease provided by the invention has the advantages of good stability, wear resistance, antifriction, excellent high-low temperature performance and good compatibility with plastic materials.

Inventors

  • ZHENG HONG
  • CHEN TIANJIN
  • ZHANG JUAN
  • CHEN BIAO
  • CHENG SHENG
  • MA RUI
  • SHEN YI

Assignees

  • 浙江得润宝新材料有限公司

Dates

Publication Date
20260512
Application Date
20260203

Claims (10)

  1. 1. The lubricating grease is characterized by comprising, by weight, 65-85 parts of base oil, 8-15 parts of thickening agent, 5-15 parts of antiwear and antifriction agent, 0.5-5 parts of antioxidant and 0.5-5 parts of antirust agent; the base oil is at least one selected from dimethyl silicone oil and modified silicone oil.
  2. 2. The lubricating grease according to claim 1, wherein the lubricating grease comprises, by weight, 70-80 parts of base oil, 10-13 parts of thickener, 8-12 parts of antiwear friction reducer, 2-4 parts of antioxidant and 0.5-2 parts of rust inhibitor.
  3. 3. Grease according to claim 1 or 2, wherein the base oil is a dimethicone and a modified silicone oil; preferably, the modified silicone oil comprises any one or a combination of at least two of amino modified silicone oil, polyether modified silicone oil, epoxy modified silicone oil, methylphenyl silicone oil and hydrogen-containing silicone oil.
  4. 4. A grease according to any one of claims 1 to 3, wherein the thickener is a metal soap formed by the reaction of at least one organic acid with at least one metal hydroxide or metal oxide; preferably, the organic acid comprises at least one of aliphatic carboxylic acid, naphthenic acid and aromatic acid, preferably dodecahydroxystearic acid; Preferably, the metal is selected from at least one of alkaline earth metals, aluminum, lithium, sodium, calcium, barium, zinc, preferably lithium hydroxide and calcium hydroxide.
  5. 5. The grease of any of claims 1-4, wherein the antiwear friction reducer comprises any one or a combination of at least two of polytetrafluoroethylene, molybdenum disulfide, graphite, modified boron nitride nanotubes, melamine cyanurate or nanoscale zinc oxide, preferably polytetrafluoroethylene, modified boron nitride nanotubes, melamine cyanurate.
  6. 6. Grease according to any of claims 1 to 5, wherein the antioxidant comprises any one or a combination of at least two of benzotriazole and its derivatives, benzothiazole derivatives, hindered phenolic antioxidants or peroxide decomposers, preferably benzotriazole and its derivatives, hindered phenolic antioxidants.
  7. 7. The grease of any one of claims 1-6, further comprising 0.5-2 parts by weight of a rust inhibitor; The rust inhibitor includes any one or a combination of at least two of a carboxylic acid type, an amine type or a sulfonate type rust inhibitor containing a siloxane segment or a silane coupling group, and preferably a sulfonate type rust inhibitor containing a siloxane segment.
  8. 8. A method of preparing a grease according to any one of claims 1-7, characterized in that the method of preparing comprises the steps of: Mixing and heating part of base oil with organic acid to obtain a first mixture, reacting the first mixture with metal hydroxide to obtain a second mixture, heating and preserving heat, and then mixing with the rest of base oil, an antiwear antifriction agent and an antioxidant to obtain the lubricating grease.
  9. 9. The method of claim 8, wherein the mixing with the ester oil, the antiwear and antifriction agent, the antioxidant further comprises mixing with a rust inhibitor; Preferably, the reaction is for a time of at least 60 min; Preferably, in the heating and heat preservation, the temperature is raised to 130-200 ℃ and the heat preservation time is 10-60 min.
  10. 10. Use of a grease according to any one of claims 1-7 for the preparation of a shock absorber plain bearing grease.

Description

Lubricating grease and preparation method and application thereof Technical Field The invention belongs to the field of lubricants, and particularly relates to lubricating grease, a preparation method and application thereof, in particular to lubricating grease with good wear resistance and antifriction performance, and a preparation method and application thereof. Background The flat bearings of the shock absorber of an automobile are key components connecting the body with the suspension spring/shock absorber assembly and are positioned at the top of the shock absorber. The main function of the device is to allow the shock absorber piston rod to swing and rotate at a low speed and a small angle during steering while bearing the axial load of the vehicle. The lubrication state of the component directly determines the steering feel, the centering performance, the NVH (noise, vibration and harshness) level and the overall texture of the chassis of the vehicle. Currently, the sites are commonly lubricated with common lithium-based grease, calcium-based grease, or partial polyurea-based grease. However, due to the specificity and severity of the working condition, the existing lubrication scheme has the outstanding technical defects of poor steering hand feeling caused by overlarge or unstable friction torque, insufficient fretting wear resistance, easiness in generating abnormal sound and clearance, poor environmental tolerance, short service life and poor performance balance. The ideal lubricating grease can provide low and stable friction torque in a wide temperature range, fundamentally inhibit fretting wear to eliminate abnormal sound, and has excellent water resistance, rust resistance and long-acting stability, thereby improving the driving texture, reliability and service life of the whole vehicle. CN118879381A discloses a lubricating grease composition for bearings and a preparation method thereof, wherein the lubricating grease composition comprises, by weight, 60-72 parts of fluorine-containing base oil, 24-30 parts of thickening agent and 4-5 parts of modified filler additive. The transfer film formation is promoted by the nano particles formed by modifying the graphene with zirconia, the boundary lubrication of a friction system is improved, the lubricating grease is wear-resistant, zirconium ions promote heterocyclic compounds to enter and adhere to the graphene layered structure through coordination, and the eugenol groups grafted with oxygen-containing groups of the heterocyclic compounds are combined with TBA fluorine elements to improve the oil solubility, so that the mechanical property, the thermal stability and the wear resistance of the lubricating grease are remarkably improved. CN119391473A discloses an anti-friction abnormal sound lubricating agent and a preparation method, and the anti-friction abnormal sound lubricating agent is prepared from the following raw materials, by weight, 10-20 parts of paraffin wax, 5-10 parts of an emulsifying agent, 30-35 parts of deionized water, 10-15 parts of methyl silicone oil emulsion, 50 parts of deionized water, 1-3 parts of polytetrafluoroethylene, 1-2 parts of hexagonal boron nitride, 0.1-0.5 part of silicon dioxide, 0.5 part of a preservative, 0.5 part of a stabilizing agent, 0.5 part of an antioxidant, 1 part of a dispersing agent and 0.5 part of a wetting agent. The invention adopts paraffin to provide adhesive force, plays the roles of isolation and lubrication, and adopts emulsifying agent, methyl silicone oil emulsion and deionized water to enable the solid paraffin to be changed into paste or liquid auxiliary agent, polytetrafluoroethylene, hexagonal boron nitride and silicon dioxide to improve the lubrication effect of finished product reagent, and the preservative, antioxidant and stabilizer play the roles of corrosion prevention, oxidation prevention and color change prevention, and the dispersing agent and wetting agent can disperse powdery substances. As the requirements for the grease for the plane bearing of the shock absorber are higher and higher with the development of the industry. Therefore, how to provide lubricating grease with good wear resistance and antifriction performance becomes a problem to be solved. Disclosure of Invention Aiming at the defects of the prior art, the invention aims to provide lubricating grease, a preparation method and application thereof, in particular to lubricating grease with good wear resistance and antifriction performance, and a preparation method and application thereof. The lubricating grease provided by the invention has the advantages of good stability, wear resistance, antifriction, excellent high-low temperature performance and good compatibility with plastic materials. In order to achieve the aim of the invention, the invention adopts the following technical scheme: in a first aspect, the invention provides a lubricating grease, which comprises, by weight, 65-85 parts of base oil, 8-1