286results about How to "Good mechanical stability" patented technology

The present invention provides composite lithium-based lubricating grease and a preparation method thereof. The composite lithium-based lubricating grease consists of thickener, base oil and additive. The thickener consists of 12-hydroxy stearic acid lithium dibasic acid and/or lithium borate, and the mol ratio is 1 ®U 0.1 to 1 ®U 0.1to 1. The base oil is mineral oil or poly-alpha-olefin synthesis oil. The additive consists of organic amine compound antioxidant, benzotriazole and barium petroleum sulfonate or barium dinonylnaphthalene sulfonate anti-corrosion additive and rust protection agent, dialkyl dithiocarbamate or dibenzyl disulfide and sulfurized olefin cottonseed oil extreme pressure antiwear additive and nanometer copper powder repairing additive. The contents of the thickener and the base oil are respectively 6 percent to 18 percent and 82 percent to 94 percent according to the weight percentage. The lubricating grease has the multi-effect performances of high dripping point, good high-temperature performance and low-temperature performance, chemical invariability, colloid invariability, antiwear extreme pressure performance etc., and especially has the repairing function towards a damaged bearing.

The invention relates to flame-retarded lubricating grease and a preparation method thereof. The preparation method comprises the following technical steps: firstly, putting base oil and an inorganic thickening agent in an open reaction kettle for stirring and mixing, adding a dispersant after heating and heating again to take the mixture out of the kettle for use; secondly, mixing fatty acid calcium soap with the base oil, adding fatty acid lithium soap after heating, keeping heat, dehydrating and refining; finally, removing the materials to a middle kettle, lowering the temperature by cooling, stirring the materials with lubricating grease prepared by the inorganic thickening agent, adding an antioxidant, a flame retardant and an anti-rusting agent for homogenization and filtering to obtain finished products. The lubricating grease not only keeps various excellent properties of original general lithium grease, but also specially enhances the incombustible flame retardance of a 600 DGE C hot plate. Assessment of the properties of the flame-retarded lubricating grease shows that the flame-retarded grease lubricant has excellent mechanical stability, water resistance, lubricating property, anti-rusting property and flame retardance, long service life and low cost, and can replace general lithium grease used in coal mine, subway, metallurgy and other industries at present.

The invention relates to complex lithium base grease and a preparation method thereof. The preparation method comprises the following processes of: adding 1/4 of base oil and dibasic organic acid into a reaction kettle, heating and melting, and adding monobasic organic acid for reaction; adding 1/4 of base oil, cooling the base oil, and adding lithium hydroxide oil solution for saponification andwarming; adding 1/4 of base oil, moving materials in the reaction kettle to an intermediate kettle, adding the rest 1/4 of base oil into the intermediate kettle, and circulating and cooling; adding an antioxidant, a corrosion inhibitor and an extreme pressure antiwear additive; and uniformly stirring, homogenizing and degassing to obtain the complex lithium base grease. The complex lithium base grease has a simple process, the time for producing the complex lithium base grease with a normal-pressure kettle is short, energy resources are saved, production cost is reduced, the utilization rate of equipment is improved, and the saponification reaction is quick and full.

The invention discloses lithium-based lubricating grease and a preparation method thereof. The lithium-based lubricating grease is characterized by being prepared from the following components on the basis of the weight of the lubricating grease: 65-95% of lubricating base oil, 6-20% of lithium-based thickening agent and 0.5-15% of graphene. The lithium-based lubricating grease has excellent properties such as excellent high temperature resistance, water and adhesion resistance, colloidal stability, extreme pressure antiwear property, long lubricating service life, corrosion resistance and salt mist resistance.

The invention belongs to the field of polyurea-based lubricating grease, and in particular provides polyurea-based lubricating grease with high mechanical stability and a preparation method thereof. The polyurea-based lubricating grease consists of the following components in percentage by weight: 70 to 90 percent of base oil and 10 to 30 percent of polyurea-based lubricating grease thickening agent, wherein the polyurea-based lubricating grease thickening agent is prepared by mixing diisocyanate and organic amine and directly thickening the base oil; isocyanate ions and amine ions have the same molar content; and the organic amine consists of fatty amine, naphthene amine and aromatic amine in the molar ratio of (2-4):(1-2):5. The polyurea-based lubricating grease has high mechanical stability and long service life.

The invention discloses a compound lithium base grease composite, which comprises the following materials in percentage by weight: 70-89% of grease base oil, 10-25% of densifier, 0.02-2% of additive, and 0.01-5% of bismuth oxide. In the compound lithium base grease composite, micron-level bismuth oxide powder is added as an extreme-pressure additive, and the prepared compound lithium base grease composite has good colloidal stability and mechanical stability, and better high temperature performance and extreme pressure resisting performance.

The invention provides high-temperature-resistant polytetrafluoroethylene lubricating grease for sealing. The lubricating grease is prepared from, by mass, 30-70% of base oil, 25-55% of thickener, 2-5% of structural stabilizer, 1-5% of tackifier and 1-5% of lubricant. The invention further provides a preparation method of the lubricating grease, polytetrafluoroethylene micro powder serves as the thickener to thicken silicone oil as the base oil, meanwhile a certain amount of the structural stabilizer, the tackifier and the lubricant are added at the same time, and then the lubricating grease is prepared through corresponding preparation processes. The prepared polytetrafluoroethylene lubricating grease has excellent high temperature resistance, good sealing performance, excellent lubricity, adhesion and oxidation resistance, high load, water spraying resistance and other properties, the lubricating grease has no suncrack, oil splitting and hardening phenomena at the high temperature more than 200 DEG C, and has good sealing property, adhesion property and high temperature resistance.

The invention discloses composite sodium-based lubricating grease and a preparation method thereof. By the weight of the lubricating grease, the compound sodium-based lubricating grease comprises the following components: 65-95% of lubricating base oil, 5-30% of a composite sodium-based thickener and 0.2-15% of graphene. The composite sodium-based lubricating grease disclosed by the invention has excellent properties such as high temperature resistance, water resistance, adhesivity, colloid stability, extreme pressure antiwear property, long lubricating life, corrosion resistance and salt fog resistance.

The invention provides a polyurea grease composition and a preparation method thereof. The composition has excellent mechanical stability, water resistance, oxidation resistance, colloid stability, and the like, comprises base oil and a polyurea densifier, and is characterized in that the polyurea densifier is obtained through the reaction between diisocyanate and organic amine, and the organic amine is composed of aliphatic amine, aromatic amine, and polyether amine.