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Star-shaped maleic anhydride grafted EPDM copolymer lubricating oil viscosity index improver and preparation method thereof

A viscosity index improvement, maleic anhydride technology, used in lubricating compositions, petroleum industry, etc., can solve the problem of viscosity increasing performance, shear stability, oil detergency, low temperature resistance, and can not improve shear stability. And other issues

Active Publication Date: 2022-02-22
SHENZHEN KUNVII PETROCHEMICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this lubricating oil tackifier cannot improve the shear stability under low temperature conditions, and there are problems such as viscosity increasing performance, shear stability, oil detergency, and low temperature resistance.

Method used

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  • Star-shaped maleic anhydride grafted EPDM copolymer lubricating oil viscosity index improver and preparation method thereof
  • Star-shaped maleic anhydride grafted EPDM copolymer lubricating oil viscosity index improver and preparation method thereof
  • Star-shaped maleic anhydride grafted EPDM copolymer lubricating oil viscosity index improver and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Melt polymerization method:

[0061] Accurately weigh the hydroperoxide catalyst (I) (any one of hydrogen peroxide, cumene hydroperoxide, and tert-butyl hydroperoxide), and dissolve it in a solvent to obtain a solution (A). The solution (A) is evenly sprayed into the maleic anhydride-grafted terpolymer pellets (B) and stirred, and left to stand for a period of time until the solvent is completely volatilized to obtain the composition (C); the mixed modified material ( C) Extrude on the extruder, control the extrusion temperature to 150°C, add the modified monomer trimethylolpropane triacrylate (II) and auxiliary monomer styrene dropwise in the middle or end of the heating section of the extruder The mixture (D) of (III) can be extruded to obtain the star-shaped maleic anhydride grafted EPDM copolymer lubricating oil viscosity index improver. In the described melt polymerization method, the solvent used is a solvent that can dissolve the catalyst but cannot dissolve the...

Embodiment 2

[0069] Melt polymerization method:

[0070]Accurately weigh the dialkyl peroxide catalyst (I) (such as one of dicumyl peroxide and di-tert-butyl peroxide), and dissolve it in a solvent to obtain a solution (A). The solution (A) is evenly sprayed into the maleic anhydride-grafted terpolymer pellets (B) and stirred, and left to stand for a period of time until the solvent is completely volatilized to obtain the composition (C); the mixed modified material ( C) Extrude on the extruder, control the extrusion temperature to 230°C, add the modified monomer trimethylolpropane triacrylate (II) and auxiliary monomer styrene dropwise in the middle or end of the heating section of the extruder The composition (D) of (III) is extruded to obtain the star-shaped maleic anhydride grafted EPDM copolymer lubricating oil viscosity index improver composition. In the described melt polymerization method, the solvent used is a solvent that can dissolve the catalyst but cannot dissolve the terpoly...

Embodiment 3

[0078] Melt polymerization method:

[0079] Accurately weigh the peroxyester catalyst (I) (such as one of tert-butyl peroxybenzoate and tert-butyl peroxy-tert-valerate), and dissolve it in a solvent to obtain a solution (A). The solution (A) is evenly sprayed into the maleic anhydride-grafted terpolymer pellets (B) and stirred, and left to stand for a period of time until the solvent is completely volatilized to obtain the composition (C); the mixed modified material ( C) Extrude on the extruder, control the extrusion temperature to 160°C, add the modified monomer trimethylolpropane triacrylate (II) and auxiliary monomer styrene dropwise in the middle or end of the heating section of the extruder The composition (D) of (III) is extruded to obtain the star-shaped maleic anhydride grafted EPDM copolymer lubricating oil viscosity index improver composition. In the described melt polymerization method, the solvent used is a solvent that can dissolve the catalyst but cannot dissol...

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Abstract

The invention discloses a star-shaped maleic anhydride-grafted EPDM copolymer lubricating oil viscosity index improver and a preparation method thereof. It is an EPDM rubber grafted with maleic anhydride, a catalyst (I ), modified monomer (II), auxiliary monomer (III), the solid of the star-shaped polymer prepared by a specific melt polymerization method, or the liquid combination of the star-shaped polymer prepared by the solution polymerization method thing. The present invention can improve shear stability or low-temperature performance without reducing the detergency of OCP VII oil.

Description

technical field [0001] The invention belongs to the technical field of lubricating oil modification, and in particular relates to a lubricating oil viscosity index improver composition and a preparation method thereof. Background technique [0002] Viscosity index improver (VII) is a rubbery or solid oil-soluble polymer compound at normal temperature, usually diluted with 150SN or 100SN neutral oil to a 5-10% concentrate for use (Li Zhongming. A Lubricating oil composition viscosity index improver. CN 108048167A). Adding VII to lubricating oil can obtain a multi-grade oil with good low-temperature startability, suitable high-temperature viscosity, universal use in all seasons, and long service life. The polymer chain of VII in lubricating oil fully stretches at high temperature to increase the viscosity; it shrinks and curls at low temperature and has little effect on viscosity. Therefore, compared with single-grade lubricating oils with the same viscosity, multi-grade oil...

Claims

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Application Information

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IPC IPC(8): C08F285/00C08F222/14C08F212/08C08F8/50C08F255/06C10M145/18C10N30/02C10N30/04C10N30/08C10N30/10
CPCC08F285/00C08F8/50C10M145/18C10M2205/022C10M2205/024C10M2205/04C10M2209/08C10M2209/086
Inventor 马道林马浚轩
Owner SHENZHEN KUNVII PETROCHEMICAL TECH CO LTD