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Lubricating oil composition viscosity index improver

A technology for viscosity index improvement and lubricating oil composition, which is applied in the field of lubricating oil, can solve the problems of high price of lubricating oil viscosity index improvers, thickening ability and cutting stability, and the cleanliness of oil products can not be taken into account at the same time. Good oxidation stability, improved thickening ability, and excellent low temperature fluidity

Inactive Publication Date: 2018-05-18
嵊州市仲明新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the object of the present invention is to provide a viscosity index improver for lubricating oil compositions, the purpose of which is to solve the problem of high price of the viscosity index improver of lubricating oil, thickening ability, shear stability and oil cleanliness. The problem that the properties cannot be taken into account at the same time, by reforming the hydrocarbons of the two, the thickening ability, shear stability and low temperature viscosity of the viscosity index improver can be effectively improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Viscosity index improver of lubricating oil composition by adding base oil Add ethylene-propylene copolymer into a polymerization reactor with a temperature of 60-70°C and a pressure of 0.1-0.5MPa, and heat to 80°C-low while stirring At 100°C, add ethylene-propylene copolymer, and then raise the temperature to 100°C-200°C to completely dissolve the ethylene-propylene copolymer, then add isoprene monomer, butadiene monomer, and styrene monomer in sequence carry out the polymerization reaction. After the polymerization reaction is completed, the polyisoprene-b-polybutadiene-b-polystyrene triblock copolymer is obtained, and the resulting triblock copolymer is subjected to hydrogenation reaction, and the measured temperature is 70°C at a specific The ratio of the storage modulus (G) to the loss modulus (G) of the solution measured under the conditions is 0.40 or more, and the obtained solution (α) at ​​25° C. with a solid content concentration of 25% by mass, and...

Embodiment 2

[0027] Example 2: Viscosity index improver of lubricating oil composition by adding base oil Add ethylene-propylene copolymer into a polymerization reactor with a temperature of 80°C and a pressure of 0.001-0.45MPa, and heat it to 80°C-lower than 100°C while stirring. ℃, add ethylene-propylene copolymer, and then raise the temperature to 105-150 ℃ to completely dissolve the ethylene-propylene copolymer, then add butadiene monomer and styrene monomer in turn to carry out polymerization reaction. After the polymerization reaction is completed, the polybutadiene-b-polystyrene tri-block copolymer is obtained, and the obtained polymer is subjected to hydrogenation reaction, and the storage modulus of the solution is measured under specific conditions at a temperature of 80°C The ratio of (G) to the loss modulus (G) is 0.80 or more to obtain a solution (α) having a solid content concentration of 20% by mass at 22° C., and raising the temperature of the solution (α) to 110 °C at a spe...

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Abstract

The invention discloses a lubricating oil composition viscosity index improver. The lubricating oil composition viscosity index improver comprises a hydrogenated block copolymer with minimal crystallinity degree and with at least one control distributed block copolymer. An oil composition of base oil and viscosity index improver is provided and comprises the following components in percentage by weight: 1 to 30 percent of ethylene-propylene copolymer, 0.0001 to 1.0 percent of a controllable degrading catalyst and the balance of base oil; the weight-average molecular weight Mw of the ethylene-propylene copolymer is 0.5*10<5> to 5.0*10<5>, and the ratio Mw / Mn of the weight-average molecular weight Mw to the number-average molecular weight Mn is 1.6 to 3.8; the controllable degrading catalystis selected from at least one of peroxide or azo compounds; and the motion viscosity V100 of the base oil at 100 DEG C is 2.0 to 10.0 centistokes. The lubricating oil composition viscosity index improver has the following advantages: the problems that the lubricating oil viscosity index improver has too high price and the thickening ability, the cutting stability and the oil product clearing property cannot be taken into consideration at the same time are solved, hydrocarbon recombination is conducted, and the thickening ability, the shear stability and the low-temperature viscosity of the viscosity index improver can be improved effectively.

Description

technical field [0001] The invention relates to the technical field of lubricating oil, in particular to a viscosity index improver for lubricating oil compositions. Background technique [0002] When the engine is running, if some friction parts are not properly lubricated, dry friction will occur. Practice has proved that the heat generated by dry friction in a short period of time is enough to melt the metal, causing damage or even jamming of the parts (many leaking or oil leaking cars have problems such as cylinder scuffing and shaft holding, the main reason is this). Therefore, good lubrication must be given to the friction parts in the engine. When the lubricating oil flows to the friction part, it will adhere to the friction surface to form an oil film to reduce the resistance between the friction parts, and the strength and toughness of the oil film are the key to exert its lubricating effect. However, the amount should not be too large, because when the amount is ...

Claims

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Application Information

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IPC IPC(8): C10M143/12C10N30/02
CPCC10M143/12C10M2205/022C10M2205/024C10M2205/04C10M2205/06C10N2030/02C10N2030/68C10N2060/02
Inventor 李仲明
Owner 嵊州市仲明新材料科技有限公司
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