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Viscosity index improver for recombined type lubrication oil

A technology for improving viscosity index and lubricating oil, applied in lubricating compositions, additives, petroleum industry, etc., can solve the problems of difficulty in taking both thickening ability and shear stability into consideration, high price, and achieve good compatibility and storage. The effect of stability, reduced dosage, and lower cost of use

Active Publication Date: 2013-12-25
SHENZHEN KUNVII PETROCHEMICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the production process of OCP products currently on the market, the price of OCP products with good SSI indicators is often high, which is a burden to consumers, and it is difficult to balance thickening ability and shear stability at the same time.

Method used

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  • Viscosity index improver for recombined type lubrication oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Select the following components in weight percent: ethylene-propylene copolymer 0.1%; styrene or styrene / conjugated diene polymer 0.1%; base oil 99.8%; first ethylene-propylene copolymer and styrene or benzene The solid in the ethylene / conjugated diene polymer is cut into small pieces, and then added to the base oil, while raising the temperature and stirring mechanically or pneumatically, when the temperature rises to 70-400°C, stir at a constant temperature until the mixing or grafting is completed.

[0030] Moreover, the molecular weight can be degraded or even dehydrated while grafting until the requirements are met.

[0031] And the ethylene-propylene copolymer is grafted with styrene or styrene / conjugated diene polymer. In the present invention, styrene or styrene / conjugated diene polymer is grafted on the ethylene-propylene copolymer, and the saturated hydrocarbon recombination of the two can effectively improve the thickening ability of the soft environment visc...

Embodiment 2

[0033] Select the following components by weight percentage: ethylene-propylene copolymer 30%; styrene or styrene / conjugated diene polymer 30%; base oil 40%; first ethylene-propylene copolymer and styrene or benzene The solid in the ethylene / conjugated diene polymer is cut into small pieces, and then added to the base oil, while raising the temperature and stirring mechanically or pneumatically, when the temperature rises to 70-400°C, stir at a constant temperature until the grafting is completed.

Embodiment 3

[0035] Select the following components by weight percentage: ethylene-propylene copolymer 20%; styrene or styrene / conjugated diene polymer 20%; base oil 60%; first ethylene-propylene copolymer and styrene or benzene The solid in the ethylene / conjugated diene polymer is cut into small pieces, and then added to the base oil, while raising the temperature and stirring mechanically or pneumatically, when the temperature rises to 70-400°C, stir at a constant temperature until the mixing or grafting is completed.

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Abstract

The invention discloses a viscosity index improver for recombined type lubrication oil. The improved viscosity index improver for the lubrication oil is at least composed of the following components by weight: 0.1-30% of an ethylene-propylene copolymer (Olefin Copolymer, OCP), 0.1-30% of a styrene or styrene / conjugated diene (butadiene, isoprene) polymer (HSD) and 40-99.8% of base oil, wherein the olefin copolymer is grafted or mixed with a styrene or hydrogenated styrene / conjugated diene polymer. The olefin copolymer is grafted or mixed with the styrene or hydrogenated styrene / conjugated diene polymer; thickening capacity, shearing stability and low temperature viscosity of the viscosity index improver can be effectively improved through hydrocarbon recombination of the above two materials; at the same time, a viscosity index improver-adding amount can be greatly reduced; and production cost is reduced.

Description

technical field [0001] The invention relates to lubricating oil additives, especially a lubricating oil viscosity index improver. Background technique [0002] Viscosity Index Improver (Viscosity Index Improver, referred to as VII), viscosity index improver is a kind of oil-soluble high molecular polymer, adding to the oil can improve the viscosity-temperature performance of the oil and increase the viscosity index of the oil. Viscosity index improver is an oil-soluble high molecular polymer, which is generally in the form of rubber or solid at room temperature, and its relative molecular mass ranges from tens of thousands to hundreds of thousands, while the average relative molecular mass of lubricating oil is only about 500. When this polymer is dissolved in a solvent (lubricating oil), it will form a coil structure, and the volume of the coil in the solvent is much larger than that of solvent oil with a smaller molecular weight, thus making the oil The viscosity of the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M143/00C10N30/02
Inventor 龚金玉
Owner SHENZHEN KUNVII PETROCHEMICAL TECH CO LTD
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