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CN-121974800-A - High traction coefficient base oil and traction oil composition, and preparation methods and applications thereof

CN121974800ACN 121974800 ACN121974800 ACN 121974800ACN-121974800-A

Abstract

The invention discloses a high traction coefficient base oil and traction oil composition, and a preparation method and application thereof. A preparation method of base oil with high traction coefficient comprises the following steps of S1, adding sandalwood into a solvent to be dissolved to form a solution, S2, adding naphthenic acid into the solution obtained in the step S1 to form a reaction system, S3, introducing protective gas into the reaction system in the step S2, heating to reflux the system, and reacting for 12-16 hours, and S4, recovering the solvent after the reaction is finished to obtain the base oil with high traction coefficient. Compared with the traditional lubricating oil, the high traction coefficient base oil has higher traction coefficient, and MTM test results show that the traction coefficient (the highest value is more than 0.08) produced by the invention is higher than the traction coefficient of other four types of base oil, and the high traction coefficient base oil is suitable for mechanical friction type continuously variable transmission.

Inventors

  • ZHAO JINGXIN

Assignees

  • 中科卓润(烟台)润滑技术有限公司

Dates

Publication Date
20260505
Application Date
20260127

Claims (10)

  1. 1. The preparation method of the base oil with high traction coefficient is characterized by comprising the following steps: s1, adding sandalwood into a solvent to dissolve to form a solution; S2, adding naphthenic acid into the solution obtained in the step S1 to form a reaction system; S3, introducing protective gas into the reaction system in the step S2, heating to reflux the system, and reacting for 12-16 hours; And S4, recovering the solvent after the reaction is finished to obtain the high traction coefficient base oil.
  2. 2. The method for preparing the base oil with high traction coefficient according to claim 1, wherein the sandalwood is sandalwood 803, the chemical name of the sandalwood is 4- (5, 6-trimethyl bicyclo (2.2.1) hept-2-yl) cyclohex-1-ol, the solvent is petroleum ether, benzene or toluene, and the naphthenic acid is cyclohexane carboxylic acid.
  3. 3. The method for producing a high traction coefficient base oil according to claim 1, wherein the shielding gas is nitrogen gas, and step S1 is performed at normal temperature.
  4. 4. The method for preparing a high traction coefficient base oil according to claim 1, wherein the mass-to-volume concentration of the solution in the step S1 is 0.5-1g/mL, and the mass ratio of the naphthenic acid to the sandalwood is 0.54-0.60.
  5. 5. The method for producing a high traction coefficient base oil according to claim 1, wherein the solvent is recovered by depressurization in step S4, and the by-product branched in step S3 is water.
  6. 6. A high traction coefficient base oil prepared by the method of preparing a high traction coefficient base oil according to any one of claims 1 to 5, wherein the base oil has an acid value and a hydroxyl value of 0.45mgKOH/g and 34mgKOH/g, respectively.
  7. 7. The traction oil composition is characterized by comprising 85-90 parts of base oil, 6-10 parts of viscosity modifier, 2-3 parts of extreme pressure antiwear agent and 1-2 parts of antirust agent; wherein the base oil is the high traction coefficient base oil of claim 6.
  8. 8. The traction oil composition of claim 7 wherein the rust inhibitor has a total base number of 25 to 35mg koh.
  9. 9. The traction oil composition of claim 7 wherein the viscosity modifier is polymethacrylate, the extreme pressure antiwear agent is neutral phosphate, and the rust inhibitor is calcium sulfonate.
  10. 10. Use of the traction oil composition according to any one of claims 7 to 9 in a continuously variable transmission.

Description

High traction coefficient base oil and traction oil composition, and preparation methods and applications thereof Technical Field The invention relates to the technical field of lubricating materials, in particular to high traction coefficient base oil and traction oil composition as well as a preparation method and application thereof. Background The application of the friction type stepless speed changer well overcomes the defects of low transmission efficiency, large vibration and noise, unsmooth operation, unstable speed change and the like of gears, and is greatly beneficial to energy conservation and mechanical damage prevention. However, the contact area of the connection of the gearbox cone pulley and the chain belt is comparatively small and also varies from time to time, so that the problem of "slipping" often occurs due to insufficient friction. One of the key properties of conventional lubricating oils is excellent lubricating properties, which in use act to reduce friction (low coefficient of friction) of mechanical parts and reduce wear of equipment. In contrast, lubricating oil in a friction type mechanical continuously variable transmission must have characteristics of high internal friction resistance and good adhesion properties, and only an oil film formed by such oil can be firmly adhered to a metal surface, thereby reducing the occurrence of a transmission "slip" phenomenon. Traction oil is a special lubricating oil for a mechanical friction type continuously variable transmission (e.g., a vehicular continuously variable transmission). The molecular structure of traction oils needs to be more "robust" than conventional lubricating base oils, i.e., the molecular structure of the base oil used as the traction oil must contain a ring structure and a branched structure such that its molecules do not rotate freely under high pressure conditions (e.g., lubrication interfaces) as conventional oil molecules, thereby allowing torque to be transferred efficiently through the traction oil. Finally, friction force generated between oil films can be utilized through traction oil, and power is transmitted to friction of the output wheel by the input wheel so as to realize traction transmission. Therefore, in order to solve the technical problem that the traditional lubricating oil cannot be applied to the friction type mechanical stepless speed changer, a novel oil product with a higher traction coefficient must be developed. Disclosure of Invention In order to solve the technical problems, the invention provides a high traction coefficient base oil and traction oil composition, and a preparation method and application thereof. In order to achieve the above purpose, the invention adopts the following technical scheme: a method for preparing a high traction coefficient base oil, comprising the steps of: s1, adding sandalwood into a solvent to dissolve to form a solution; S2, adding naphthenic acid into the solution obtained in the step S1 to form a reaction system; S3, introducing protective gas into the reaction system in the step S2, heating to reflux the system, and reacting for 12-16 hours; And S4, recovering the solvent after the reaction is finished to obtain the high traction coefficient base oil. The sandalwood is sandalwood 803, the chemical name of the sandalwood is 4- (5, 6-trimethyl bicyclo (2.2.1) hept-2-yl) cyclohex-1-ol, the solvent is petroleum ether, benzene or toluene, and the naphthenic acid is cyclohexane carboxylic acid. Wherein the shielding gas is nitrogen, and the step S1 is performed at normal temperature. Wherein the mass volume concentration of the solution in the step S1 is 0.5-1g/mL (preferably 0.625-g/mL), and the mass ratio of the naphthenic acid to the sandalwood is 0.54-0.60 (preferably 0.57). Wherein the solvent is recovered by decompression in the step S4, and the by-product split in the step S3 is water. The high traction coefficient base oil is prepared by the preparation method of the high traction coefficient base oil, and the acid value and the hydroxyl value of the base oil are respectively 0.45mgKOH/g and 34mgKOH/g. The traction oil composition comprises 85-90 parts of base oil, 6-10 parts of viscosity modifier, 2-3 parts of extreme pressure antiwear agent and 1-2 parts of antirust agent, wherein the base oil is the base oil with the high traction coefficient. Wherein the total base number of the rust inhibitor is 25-35mgKOH/g. The viscosity improver is polymethacrylate (for example 6300V produced by Basoff, 6545 produced by Dalian new materials development Co., ltd.), the extreme pressure antiwear agent is neutral phosphate, and the antirust agent is calcium sulfonate. The application of the traction oil composition in the continuously variable transmission. The beneficial effects of the invention are as follows: (1) The preparation process of the base oil with high traction coefficient is simple, high-temperature and high-pressure operation is not needed, th