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Dispersant viscosity modifiers with amine functionality

a technology of viscosity modifier and amine, applied in the direction of additives, lubricant compositions, petroleum industry, etc., can solve the problems of increasing wear and exposing components to corrosion

Inactive Publication Date: 2017-09-28
THE LUBRIZOL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a lubricating composition that includes an oil of lubricating viscosity and an oil-soluble dispersant viscosity modifier. This dispersant viscosity modifier is made up of an olefin-based polymer backbone and at least one pendent group derived from a functionalized aliphatic amine. Each pendent group is attached to the backbone and is non-ionic, non-basic, and non-acidic. The pendent group contains a functional group with at least one heteroatom other than nitrogen. The patent also describes a process for making the lubricating composition. The technical effects of this invention include improved viscosity control, low-temperature properties, and wear protection in lubricating compositions.

Problems solved by technology

However, these materials can sometimes provide poor antiwear protection, especially in high soot conditions, leading to increased wear, particularly of seals, for example on the valve train and / or various parts of the crankcase, and expose the components to corrosion.

Method used

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  • Dispersant viscosity modifiers with amine functionality
  • Dispersant viscosity modifiers with amine functionality
  • Dispersant viscosity modifiers with amine functionality

Examples

Experimental program
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Effect test

example 1

on of a 3.5% Maleated Ethylene Propylene Aminoethyl Ethylene Urea Dispersant Viscosity Modifier

[0141]A maleated aminoethyl ethylene urea dispersant viscosity modifier is prepared from aminoethyl ethylene urea and a maleated ethylene propylene copolymer, commercially available from Mitusi as Lucant™ A-5320H.

[0142]A 3-L, four-neck flask equipped with a mechanical stirrer, a thermowell, sub-surface nitrogen inlet, and Dean-Stark trap with condenser is charged with Lucant A-5320H (900.0 g) and diluent oil (936.2 g) and heated to 100° C. Aminoethylethylene urea (42.1 g) is charged to the flask and the flask contents heated to 160° C. Once at temperature the contents are stirred for 3 h. Upon filtration the product (1798.3 g) is obtained as a viscous oil. The resulting dispersant viscosity modifier is referred to below as 3.5% MAA urea.

example 2

on of a 3.5% Maleated Ethylene Propylene Aminopropanol Dispersant Viscosity Modifier

[0143]A 5-L, 4-neck flask equipped with a mechanical stirrer, thermowell, sub-surface nitrogen inlet, and Dean-Stark trap with condenser is charged with Lucant A-5320H (1600.0 g) and 3-aminopropanol (87.0 g). The contents of the flask are stirred and heated to 150° C. At around 100° C., the contents form a gel and stirring is halted. Heating is continued and the gel breaks up around 140° C. Stirring is then resumed. With the flask contents at 150° C., additional Lucant A-5320H (1600.0 g) is added to the flask over the course of 8 hours. After complete addition, the flask is held at 150° C. for 2 hours. The flask temperature is then increased to 160° C. and held for 6 hours. A second charge of 3-aminopropanol (4.8 g) is added to the flask and the temperature held at 160° C. for an additional 5.5 hours. With the flask at 160° C., vacuum is applied to less than 1 mmHg (133 Pascal) and held for 1 hour. T...

example 3

on of a 6.5% Maleated Ethylene Propylene Copolymer

[0144]A 2-L, 4-neck flask equipped with a mechanical stirrer, thermowell, sub-surface nitrogen inlet, and an air condenser with attached water cooled condenser is charged with Lucant HC-2000 (1000.0 g), a commercially available olefin copolymer supplied by Mitsui. The contents of the flask are heated to 160° C. with a sub-surface nitrogen purge of 0.5 SCFH for 1 hour. Di-tert-butylperoxide (16.0 g) and maleic anhydride (76.0 g) are charged simultaneously to the flask over the course of 2.75 hours. The contents of the flask are held at 160° C. for 0.75 hours, then the temperature increased to 180° C. with vacuum being applied to 20 mmHg (2666 Pa) for 4 hours. The vacuum is then released and upon cooling, the product is obtained as a viscous oil (1024.6

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Abstract

A lubricating composition includes an oil of lubricating viscosity and an oil-soluble dispersant viscosity modifier. The dispersant viscosity modifier includes an olefin-based polymer backbone and at least one pendent group derived from a functionalized aliphatic amine. Each pendent group is independently attached to the olefin-based polymer backbone. The pendent group is non-ionic, non-basic, and non-acidic and includes a functional group which includes at least one heteroatom other than nitrogen.

Description

[0001]This application claims the priority of International Application PCT / US2015 / 050157, filed Sep. 15, 2015, and U.S. Provisional Application Ser. No. 62 / 050,325, filed Sep. 15, 2014, from which the PCT application claims priority, the disclosures of which are incorporated herein by reference, in their entireties.BACKGROUND[0002]Aspects of the exemplary embodiment relate to a dispersant viscosity modifier, and more specifically to a dispersant viscosity modifier with an amine functionality and to a lubricating composition, such as an engine oil, which includes the described dispersant viscosity modifier. Aspects of the exemplary embodiment also relate to a method for use of the described dispersant viscosity modifier to improve the film thickness and / or antiwear performance of such a lubricating composition.[0003]Lubricating oil compositions desirably maintain a relatively stable viscosity over a wide range of temperatures. Viscosity modifiers are often used to reduce the extent ...

Claims

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Application Information

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IPC IPC(8): C10M149/06C10M145/14C10M157/10C10M149/04
CPCC10M149/06C10M149/04C10M145/14C10N2230/02C10N2240/10C10M2217/06C10M2209/084C10M157/10C10M149/12C10M149/14C10M159/12C10M2203/1025C10M2205/022C10M2223/045C10N2020/04C10N2030/04C10N2030/02C10N2030/06C10N2010/04C10N2040/253C10N2040/252C10N2040/25C10N2020/02C10M2205/024C10M2209/086C10N2060/09
Inventor PRESTON, ADAMZHANG, YANSHISLOCUM, SONA S.GIESELMAN, MATTHEW D.
Owner THE LUBRIZOL CORP