8results about How to "Drop point high" patented technology

The present application relates to the field of lubricating materials, and specifically discloses a high temperature resistant grease for gears and a preparation method thereof, wherein the grease comprises the following raw materials: synthetic oil PAO, ester base oil, thickener, antioxidant, extreme pressure anti-wear agent, rust inhibitor, Peek-based composite additive; Peek-based composite additive is prepared by mixing polyetheretherketone with hydrogenated styrene isoprene copolymer, impregnating with porous polyester-silicon dioxide composite microspheres, and then drying; its preparation method comprises the following steps: mixing synthetic oil PAO and ester base oil, heating and stirring, heating and stirring after adding antioxidant; cooling, adding extreme pressure anti-wear agent and rust inhibitor, stirring, adding thickener and Peek-based composite additive, mixing and stirring, cooling, and preparing. The present application has the characteristics of improving the dropping point of household appliance gear grease, thereby improving its high temperature resistance, and not softening and flowing out under high temperature working conditions to affect the lubrication effect.

The invention discloses perfluoropolyether lubricating grease with high colloid stability and a preparation method thereof.The preparation method comprises the following steps that polytetrafluoroethylene micro powder and a diluent are added into a reaction kettle and stirred, a suspension is obtained, and the diluent is a fluorine-containing solvent; and adding perfluoropolyether base oil into the suspension, stirring to obtain a mixture, removing the diluent in the mixture, and degassing to obtain the perfluoropolyether lubricating grease. The perfluoropolyether is used as the base oil, the polytetrafluoroethylene micro powder is used as the thickening agent, and the diluting agent is added in the preparation process, so that the thickening agent is uniformly dispersed in the perfluoropolyether base oil, the thickening agent and the base oil are in full contact, the action area is increased, and the colloid stability of the lubricating grease is improved. The preparation process is simple, and the diluent can be removed and recycled subsequently, so that the diluent can be recycled, and the production cost is reduced.

The invention relates to the technical field of lubricating grease, discloses composite polyurea sulfonate lubricating grease and provides a preparation method thereof. The lubricating grease comprises the following components in percentage by mass: 75-85% of base oil, 15-20% of a thickening agent and 0-5% of an additive, the thickening agent is polyurea sulfonate. According to the invention, sulfonate is introduced into polyurea thickening agent molecules, so that the lubricating grease also has good extreme pressure antiwear property, mechanical stability, colloidal stability and other properties under the condition of ensuring high dropping point and thermal stability of the lubricating grease; the preparation method of the lubricating grease is simple in process, production conditions are easy to control, and the obtained product is stable in quality.

The present application relates to the technical field of lubricating grease, and particularly relates to a steel wire rope lubricating grease and a preparation method thereof. The steel wire rope lubricating grease comprises the following components in percentage by weight: base oil 40-70%, petroleum-based wax or synthetic wax 5-25%, tackifier 5-30%, sepiolite 3-15%, antirust agent 0.5-5%, antioxidant 0.5-5%, and anti-wear agent 0.5-5%; the base oil is selected from one or more of naphthenic base oil, poly-alpha olefin, extracted oil and asphalt. The lubricating grease provided by the present application can improve the dropping point and high-temperature performance of the product, solve the problems of high-temperature oil dripping and low-temperature brittle cracking of the existing product, has a wide use temperature range, and has excellent adhesion, high-low temperature performance, rust resistance and anti-wear performance, and can meet the requirements of lubricating performance and service life of the steel wire rope under harsh conditions such as high temperature and low temperature.

The present application relates to the technical field of lubricating grease, and specifically discloses a low-noise lubricating grease with good anti-shear performance and a preparation method thereof. The technical key points are: a low-noise lubricating grease with good anti-shear performance, comprising the following components in parts by weight: 60-80 parts of base oil, 20-35 parts of thickener, 5-10 parts of pentaerythritol tetraisostearate, 0.5-2 parts of antioxidant, 1-3 parts of anti-wear extreme pressure agent, 0.1-0.5 parts of metal passivator, 1-10 parts of viscosity enhancer, and 0.5-1 parts of rust inhibitor; the base oil is polyalphaolefin, and the viscosity at 40°C is 20-200mm 2 / s; the thickener is amino aromatic amine, hydroxy fatty amine and diisocyanate. The grease provided by the present application has excellent shear resistance and low noise performance.

The present invention provides a lubricating grease, a preparation method and use thereof. The lubricating grease comprises the following raw materials in parts by weight: 75-80 parts of composite titanium-based lubricating grease, 15-20 parts of composite lithium-based lubricating grease, 2.1-6 parts of rust inhibitor, 7-16 parts of anti-wear agent, and 1-4 parts of antioxidant. The weight ratio of the composite titanium-based lubricating grease to the composite lithium-based lubricating grease is 4-5:1. The composite titanium-based lubricating grease and the composite lithium-based lubricating grease provided by the present invention act synergistically to make the soap fiber structure more stable, which is beneficial to improving the dropping point of the lubricating grease, so that the dropping point of the lubricating grease is as high as 320°C, the oil film strength is high, the shear stability of the lubricating grease is improved, and the four-ball machine load PD value of the lubricating grease is as high as 600kgf, which can enhance the binding capacity of the base oil and improve the water-resistant performance of the lubricating grease, thereby extending the service life of the lubricating grease.

The invention provides a calcite type flaky calcium carbonate grease and a preparation method thereof, and the method is as follows: 20-40 parts of high-alkaline calcium sulfonate, 10-30 parts of an organic solvent and 2-10 parts of distilled water are stirred uniformly at 20-50 DEG C. Then 2-8 parts of a morphology control agent is added, CO2 gas is introduced, and the reaction is carried out for 1-3 hours. Then solid-liquid separation, washing and drying are carried out to obtain a calcium carbonate thickening agent; 20-60 parts of calcium carbonate thickening agent powder, 40-80 parts of base oil are uniformly mixed, and stirring thickening reaction is carried out at 160+ / -10 DEG C for 30-90 minutes, then the temperature is continuously kept at 200+ / -20 DEG C for 10-20 minutes, and after cooling, grinding is carried out, and the calcium carbonate grease is obtained. The method has low cost, simple raw materials and preparation process, stable production batch, and can effectively solve the problems of unstable grease batch, complex preparation process and the like. The calcium carbonate grease prepared by the method has outstanding high-temperature tribological properties, the drop point is higher than 385 DEG C, the shear stability and extreme pressure performance are excellent, and the lubrication requirements under harsh working conditions such as high temperature and high load can be met.

The present invention relates to the technical field of greases, specifically a polyurea grease and a preparation method thereof. The present invention prepares brominated 2-phenylbenzimidazole-5-sulfonic acid by nucleophilic substitution with liquid bromine, and then reacts with the amino group of 3,4,4'-triaminodiphenyl ether to generate an intermediate product, a modified amine, and further reacts with isocyanate to synthesize a polyurea thickener, whose side chain contains an imidazole structure and a sulfonic acid group, and then prepares a polyurea grease by mixing with a base oil and an additive through a prefabrication method. The obtained polyurea grease has a dropping point of 301°C, good high temperature resistance, a cone penetration of 231 / 0.1mm, a consistency grade of 3#, and a moderate hardness and softness of the grease. The obtained polyurea grease has good stability and good wear resistance. The obtained polyurea grease does not contain metal atoms and will not undergo a catalytic reaction with the base oil, so it has strong antioxidant properties.