Method for improving thermal-oxidative stability and elastomer compatibility

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United States of America Patent

PATENT NO 9062269
APP PUB NO 20140274836A1
SERIAL NO

13835031

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Abstract

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A method for improving thermo-oxidative stability and elastomer compatibility in an apparatus lubricated with a lubricating oil by using as the lubricating oil a formulated oil including a lubricating oil base stock. The lubricating oil base stock includes a multi-aromatic base stock of the formula:

description='In-line Formulae' end='lead'R1—R2—(X—R2)n—R1 description='In-line Formulae' end='tail'

wherein each R1 is the same or different and is a terminal group, each R2 is the same or different and represents a substituted or unsubstituted aromatic moiety; each X is a linking moiety that is carbon-carbon single bond or a linking group, n is a number from 1 to 2000, and the ratio of the total number of aromatic ring carbon atoms to aliphatic carbon atoms in said formula is greater than 0.32:1. The multi-aromatic base stock has a kinematic viscosity greater than 20 mm2/s at 100° C.

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Patent Owner(s)

Patent OwnerAddress
EXXONMOBIL RESEARCH AND ENGINEERING COMPANY1545 ROUTE 22 EAST P O BOX 900 ANNANDALE NJ 08801-0900

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Christensen, Gary Salt Lake City, US 15 30
Cooper, Kathy K South River, US 1 0
Ho, Suzzy C Princeton, US 26 273

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