US2018282647A1PendingUtilityA1
Cold Cranking Simulator Viscosity Reducing Base Stocks and Lubricating Oil Formulations Containing the Same
Assignee: EXXONMOBIL CHEMICAL PATENTS INCPriority: Mar 28, 2017Filed: Mar 20, 2018Published: Oct 4, 2018
Est. expiryMar 28, 2037(~10.7 yrs left)· nominal 20-yr term from priority
Inventors:Kyle G. Lewis
C10M 2205/0285C10N 2030/02C10M 2207/2855C10M 2207/2835C10M 2207/2825C10N 2070/00C10N 2030/08C10M 2203/1025C10N 2040/25C10M 105/34C10M 171/02C10N 2020/02C10M 169/042C10M 2207/2815C10N 2230/02C10N 2230/08
49
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Claims
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., 5 W and 0 W) 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 oil formulations containing the CCSV-reducing base stocks, and a method for determining the CCSV-reducing efficacy of a base stock.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1 . A method for determining the reducing efficacy of a first base stock in reducing cold crank simulator viscosity at a given temperature as determined pursuant to ASTM D5293 (“CCSV”) of a lubricating oil formulation comprising the first base stock and a reference oil, the method comprising:
determining the kinematic viscosity at 100° C. pursuant to ASTM D2245 (“KV100”) of the reference oil;
to determining the CCSV of the reference oil;
determining the KV100 of a mixture oil consisting of the first base stock and the reference oil at a first concentration of the first base stock based on the total quantity of the mixture oil;
determining the CCSV of the mixture oil; and
determining the first base stock as not a CCSV-boosting base stock if the CCSV of the mixture oil is smaller than the CCSV of the reference oil.
2 . The method of claim 1 , further comprising:
recording the KV100 and CCSV of the reference oil as KV100(ref) and CCSV(ref), respectively; recording the KV100 and CCSV of the mixture oil as KV100(oil) and CCSV(oil), respectively; determining the following values D(kv) and D(ccsv):
D
(
kv
)
=
KV
100
(
oil
)
-
KV
100
(
ref
)
KV
100
(
ref
)
×
100
;
and
D
(
ccsv
)
=
CCSV
(
oil
)
-
CCSV
(
ref
)
CCSV
(
ref
)
×
100
;
and
determining the reducing efficacy of the first base stock based on D(kv) and D(ccsv).
3 . The method of claim 1 , further comprising:
determining the first base stock as a CCSV-reducing base stock at the first concentration if the KV100 of the mixture oil is larger than the KV100 of the reference oil, and the CCSV of the mixture oil is smaller than the CCSV of the reference oil.
4 . The method of claim 2 , further comprising:
determining the first base stock as a CCSV-reducing base stock at the first concentration if D(kv)<0, D(ccsv)<0, and D(ccsv)/D(kv)≥3.0.
5 . The method of claim 3 , further comprising:
determining the first base stock as a superior CCSV-reducing base stock at the first concentration if D(ccsv)≤−5.
6 . The method of claim 1 , further comprising:
determining the first base stock as a CCSV-reducing base stock at the first concentration if either of the following (i) and (ii) is met: (i) CCSV(ref)<CCSV(oil); and (ii) D(kv)<0, and D(ccsv)/D(kv)<3.0.
7 . The method of claim 5 , further comprising:
determining the first base stock as an overall superior CCSV-reducing base stock if the first stock is a superior CCSV-reducing base stock at a concentration of 5 wt % thereof based on the total weight of the first base stock and the reference oil.
8 . The method of claim 1 , wherein:
The lubricating oil formulation comprises an API Group III and/or Group IV base stock.
9 . The method of claim 1 , wherein:
the reference oil comprises an API Group III and/or Group IV base stock.
10 . The method of claim 1 , wherein:
the reference oil is the remainder of the lubricating oil formulation absent the first base stock and absent all additive components.
11 . The method of claim 1 , wherein:
the reference oil comprises a mixture of all base stocks in the lubricating oil formulation other than the first base stock.
12 . The method of claim 1 , wherein:
the reference oil comprises a base stock in the lubricating oil formulation having a CCSV that is closest to the CCSV of the first base stock among all base stocks contained in the lubricating oil formulation other than the first base stock.
13 . The method of claim 1 , wherein:
the reference oil comprises a base stock in the lubricating oil formulation having a KV100 that is closest to the KV100 of the first base stock among all base stocks contained in the lubricating oil formulation other than the first base stock.
14 . The method of claim 1 , wherein:
the lubricating oil formulation consists of the reference oil and the first base stock.
15 . A method for making a lubricating oil formulation, comprising:
providing a reference oil with a kinematic viscosity at 100° C. as determined by ASTM D2245 (“KV100”) of KV100(ref) and cold crank simulator viscosity at a given temperature as determined by ASTM 5293 (“CCSV”) of CCSV(ref); providing a first base stock having a CCSV of CCSV(b), where CCSV(b)<CCSV(ref); such that when mixing the reference oil and the first base stock to obtain a mixture oil having a KV100 of KV100(oil) and a CCSV of CCSV(oil), one of the conditions (i) and (ii) below is met: (i) D(kv)>0 and D(ccsv)<−5; and (ii) D(kv)<0, D(ccsv)<−5, and D(ccsv)/D(kv)≥3.0, where
D
(
kv
)
=
KV
100
(
oil
)
-
KV
100
(
ref
)
KV
100
(
ref
)
×
100
;
and
D
(
ccsv
)
=
CCSV
(
oil
)
-
CCSV
(
ref
)
CCSV
(
ref
)
×
100.
16 . The method of claim 15 , further comprising:
providing additional components; and mixing the additional components with the first base stock and the reference oil to obtain the lubricating oil formulation.
17 . The method of claim 15 , wherein:
the reference oil comprises an API Group III and/or Group IV base stock, the Group III base stock and Group IV base stock being different from the first base stock.
18 . The method of claim 15 , wherein:
the reference oil comprises an API Group IV base stock having a KV100 in the range from 3.0 to 15.0 cSt.
19 . The method of claim 15 , wherein:
the reference oil comprises a base stock in the lubricating oil formulation having a CCSV that is closest to the CCSV of the first base stock among all base stocks contained in the lubricating oil formulation other than the first base stock.
20 . The method of claim 15 , wherein:
the reference oil comprises a base stock in the lubricating oil formulation having a KV100 that is closest to the KV100 of the first base stock among all base stocks contained in the lubricating oil formulation other than the first base stock.
21 . The method of claim 15 , wherein:
the reference oil comprises an API Group IV base stock having a KV100 in a range from 3.0 to 8.0 cSt.
22 . The method of claim 15 , wherein:
the lubricating oil formulation is free of the reference oil; and the lubricating oil formulation comprises a second base stock having a KV100 within the range from 0.50*KV100(ref) to 2.0*KV100(ref), where the second base stock is in the same API Group as the reference oil.Join the waitlist — get patent alerts
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