Cold cranking simulator viscosity reducing base stocks and lubricating oil formulations containing the same

Patent metadata

Field	Value
Publication number	US-10808196-B2
Application number	US-201815925937-A
Country	US
Kind code	B2
Filing date	Mar 20, 2018
Priority date	Mar 28, 2017
Publication date	Oct 20, 2020
Grant date	Oct 20, 2020

Abstract

This disclosure relates to cold cranking simulator viscosity (“CCSV”) reducing base stocks that allow flexibility for low viscosity SAE engine oil grades (e.g., 5W and 0W) to meet demanding low temperature viscosity requirements while maintaining a higher base oil viscosity for improved wear protection. The CCSV-reducing base stocks include mono-esters derivable from a Guerbet alcohol and a monocarboxylic acid. The disclosure also relates to lubricating oils containing the CCSV-reducing base stocks, and a method for improving fuel efficiency and/or wear protection in an engine by using as the lubricating engine oil a formulated oil containing one or more of the CCSV-reducing base stocks.

First claim

What is claimed is:

1. An oil composition consisting of a first base stock and a reference oil, wherein:
the first base stock comprises 2-octyldodecyl dodecanoate, 2-octyldodecyl nonanoate, or mixtures thereof;
the first base stock is present in the oil composition at a concentration in a range from 0.5 wt % to 14.5 wt %, based on the total weight of the oil composition;
the oil composition has a kinematic viscosity at 100° C. pursuant to ASTM D445 (“KV100”) of KV100(oil) and a cold cranking simulator viscosity at a given temperature pursuant to ASTM 5293 (“CCSV”) of CCSV(oil);
the reference oil has a KV100 and CCSV of KV100(ref) and CCSV(ref), respectively, the reference oil is the remainder of the oil composition absent the first base stock, and the following conditions (i), (ii), and (iii) are met:

-
20

≤

D
⁡

(
kv
)

=

K
⁢

⁢
V
⁢

⁢
100
⁢

(
oil
)

-

K
⁢

⁢
V
⁢

⁢
100
⁢

(
ref
)

K
⁢

⁢
V
⁢

⁢
100
⁢

(
ref
)

×
100

≤
40

;

(
i
)

-
1000

≤

D
⁡

(
ccsv
)

=

C
⁢

⁢
C
⁢

⁢
S
⁢

⁢

V
⁡

(
oil
)

-

C
⁢

⁢
C
⁢

⁢
S
⁢

⁢

V
⁡

(
ref
)

C
⁢

⁢
C
⁢

⁢
S
⁢

⁢

V
⁡

(
ref
)

Assignees

• Exxonmobil Chemical Patents Inc

Inventors

• Lewis Kyle G

Classifications

• C10M2205/0285

  used as base material · CPC title

• C10N2020/04

  Molecular weight; Molecular weight distribution · CPC title

• C10M129/70

  of monocarboxylic acids · CPC title

• C10N2040/25

  Internal-combustion engines · CPC title

• C10N2030/06

  Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure · CPC title