US2020263106A1PendingUtilityA1
Lubricating oil composition for diesel engines
Est. expiryDec 28, 2035(~9.4 yrs left)· nominal 20-yr term from priority
C10M 169/04C10M 105/34C10M 145/14C10N 2020/02C10M 143/10C10N 2030/54C10M 169/044C10M 143/12C10N 2040/252C10N 2030/74C10M 109/00C10N 2030/02C10N 2030/04C10M 2219/044C10M 2207/282C10N 2030/10C10N 2060/14C10M 2203/1025C10M 2205/028C10M 2205/0206C10N 2030/68C10M 2205/022C10M 2205/04C10M 2209/084C10M 2207/34C10M 2205/173
42
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Claims
Abstract
The invention provides a lubricating oil composition for diesel engines which contains a GTL base oil with a kinematic viscosity at 100° C. of 4.5 to 5.5 mm2/s, a comblike PMA (polymethacrylate) based viscosity index improver and a boron-containing dispersant and/or boron-containing detergent, the total content of the boron-containing dispersant and/or boron-containing detergent in terms of conversion to boron content relative to the total amount of the composition being not less than 0.025 mass %, and which satisfies 0W-30 or 5W-30 in the SAE J300 standard.
Claims
exact text as granted — not AI-modified1 . A lubricating oil composition for diesel engines characterised in that it contains:
a) a GTL base oil with a kinematic viscosity at 100° C. of 4.5 to 5.5 mm 2 /s, b) a comb-like PMA (polymethacrylate) based viscosity index improver, and c) a boron-containing dispersant and/or boron-containing detergent, wherein the total amount of boron-containing dispersant and/or boron-containing detergent incorporated in terms of conversion to boron content relative to the total amount of the composition being not less than 0.025 mass %, and wherein it satisfies 0W-30 or 5W-30 in the SAE J300 standard.
2 . The lubricating oil composition for diesel engines in accordance with claim 1 which includes a non-comb-like PMA (polymethacrylate) based viscosity index improver and an SCP (styrene-diene copolymer) based viscosity index improver and/or an OCP (olefin copolymer) based viscosity index improver, and which further satisfies at least one of the following (1) to (3).
(1) Non-comb-like PMA based viscosity index improver content/total viscosity index improver content: not more than 0.7,
(2) OCP based viscosity index improver content/total viscosity index improver content:
not more than 0.2,
(3) SCP based viscosity index improver content/total viscosity index improver content: not more than 0.3.
3 . The lubricating oil composition for diesel engines in accordance with claim 1 satisfying the following viscosity characteristic:
[
HTHS
100
°
C
.
viscosity
(
capillary
method
)
-
HTHS
100
°
C
.
viscosity
(
TBS
method
)
]
HTHS
100
°
C
.
viscosity
(
TBS
method
)
=
0.07
to
0.15Join the waitlist — get patent alerts
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