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Engine oil compositions and preparation thereof

a technology of engine oil and composition, applied in the field of engine oil composition, can solve the problems of increasing the complexity of engine oil formulation, increasing the cost of viscosity index improver, and affecting the service life of engine oil, so as to improve the service life, reduce the level of viscosity modifier, and improve the effect of engine oil composition

Inactive Publication Date: 2008-03-06
CHEVROU USA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Engine oil formulations have become increasingly complex with the stringent demands made by the developing automotive industry, e.g., lubricants which can be utilized over a wide range of operating conditions including temperature variations.
Furthermore, the automotive industry desires lubricants which will stay in their viscosity grades for a substantial length of time again under both use and storage conditions.
Viscosity index improvers are expensive and may shear in service.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples

[0079] The following examples are given as non-limitative illustration of aspects of the invention. Unless specified otherwise, the components in the examples are as follows (and expressed as wt. % in the Tables):

[0080] Pour Point Reducing Blend Component (PPRBC-FTBO) is from Chevron Corporation of San Ramon, Calif. The properties are as listed in Table 4.

[0081] XOM 150N and 600N are Group I base stocks from ExxonMobil Corporation.

[0082] NESTE™ 3050, 3080 and 3043XV are Group III base oil stocks from Neste Oil Corporation, NESTE™ 3043, 3050 and 3080 have properties as follows:

TABLE 1Typical valueTypical valueTypical valueNESTE ™NESTE ™NESTE ™Property304330503080Viscosity @ 40° C.,20-212650cSt (mm2 / s)Viscosity @ 100° C.,4.2-4.45.18.0cSt (mm2 / s)Viscosity index>121126128Pour point, ° C.−18−15−15Flash point, ° C.224240260Color (ASTM D-1500-04a)Noack volatility, w %14.4Density at 15° C.831835843

[0083] XOA3161F, OLOA™ 4594HA, and OLOA™ 59912 are additive packages from Chevron Oronite...

examples 1-4

[0086] The components in Table 2 were blended together and their properties were measured. The results are also show in Table 2.

[0087] The results establish that the addition of the Pour Point Reducing Blend Component allows up to 20% reduction in the viscosity modifier (VM) content, with low temperature performance remaining essentially similar to samples with a high VM content. Low VM content is key in European engine deposit tests.

TABLE 2ExampleExampleExampleExampleAll examples are 10W40 blends1234Base stock NEXBASE 3050, wt. %48.8752.6158.2761.34Base stock NEXBASE 3080, wt. %26.9 19.4611.105.33PPRBC - FTBO, wt. %0  4.007.0010.00XOA3161F Additive, wt. %19.4 19.419.419.4PARATONE 8071, wt. % 4.904.604.304.00=100%  =93.9%=87.9%=81.6%Kinematic Viscosity @ 40° C., mm2 / s————Kinematic Viscosity @ 100° C., mm2 / s14.0114.0313.8213.76CCS at −25° C.6767   685267956868Mini Rotary ViscosimeterViscosity cP (max 60,000) ASTM27400   350002390024900D4684 @ −30° C.Yield Stress, Pa (max ASTM D468...

examples 5-8

[0088] The components in Table 3 were blended together and their properties were measured. The results are shown in Table 3.

[0089] As shown, the addition of the Pour Point Reducing Blend Component allows a reduction in the viscosity modifier. There is also significantly less deposit build-up with the reduced amount of viscosity modifier used.

TABLE 3Example 5Example 6Example 7Example 8Components in wt. %10W4010W4015W5015W50NEXBASE 3043XV4030——XOM 150N28.9641.5569.7263.06XOM 600N14.922.6519.0916.26PPRBC - FTBO, wt. %—10—10OLOA 4594HA14.714.7OLOA 59912——9.509.50OLOA 2509Z——0.40—OLOA 198030.30———Paratone 8900, wt. %1.12 = 100%1.10 = 98.2%1.29 = 100%1.18 = 91.4%Kinematic Viscosity @102.9102——40° C., mm2 / sKinematic Viscosity @15.5115.4918.2418.32100° C., mm2 / sCCS at −20° C.——71407200CCS at −25° C.71507090——HTHS viscosity, cP4.484.514.804.92ASTM D5481Panel Coker Deposit - mg.,519.9371.0271.6138.6average from 4 panels

[0090]

TABLE 4PropertiesPPRBC - FTBOKinematic Viscosity @ 40° C., cSt (m...

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Abstract

A multi-grade engine oil composition meeting required specifications of manufacturers is provided. In one embodiment, the engine oil composition contains a sufficient amount of a Pour Point Reducing Blend Component for the engine oil to have cold crank simulator viscosity at −20° C. of less than have a cold crank simulator viscosity at −20° C. of less than 9000 cP and a mini rotary viscometer (MRV) viscosity at −20° C. of less than 60,000 cP. The Pour Point Reducing Blend Component is selected from 1) an isomerized Fischer-Tropsch derived bottoms product; 2) a bottoms product prepared from an isomerized highly waxy mineral oil, or 3) an isomerized oil having a kinematic viscosity at 100° C. of at least about 8 mm2 / s made from polyethylene plastic.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application is a continuation-in-part of U.S. patent application Ser. No. 11 / 159,282 filed Jun. 22, 2005. This application claims priority to and benefits under 35 USC 119 of Provisional Application U.S. Ser. No. 60 / 975,713 fled Sep. 27, 2007. This application claims priority to and benefits from all of the foregoing, the disclosures of which are incorporated herein by reference.TECHNICAL FIELD [0002] The invention relates generally to engine oil compositions, and more specifically to multi-grade engine oil compositions having a reduced level of viscosity modifiers. BACKGROUND [0003] Engine oil formulations have become increasingly complex with the stringent demands made by the developing automotive industry, e.g., lubricants which can be utilized over a wide range of operating conditions including temperature variations. At the same time, the formulated lubricants must also possess an ability to impart oxidative stability, deterge...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10M109/00
CPCC10M143/00C10N2240/104C10M2205/0285C10M2205/14C10M2205/143C10M2205/16C10M2205/163C10M2205/17C10M2205/173C10M2207/2805C10M2207/401C10N2220/021C10N2220/022C10N2220/023C10N2220/028C10N2220/031C10N2230/02C10N2230/08C10N2230/42C10N2240/10C10N2240/103C10M2203/1006C10N2020/04C10N2020/011C10N2020/071C10N2020/015C10N2020/02C10N2030/08C10N2030/02C10N2030/42C10N2040/253C10N2040/25C10N2040/255
Inventor KLEIJWEGT, PETERMILLER, STEPHEN J.ROSENBAUM, JOHN M.BERTRAND, NANCY J.ANSARI, MATTHEWCHANG, MAX I.
Owner CHEVROU USA INC
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