Note: Descriptions are shown in the official language in which they were submitted.
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COMPOSITION AND METHOD FOR PREVENTING OR REDUCING LOW SPEED
PRE-IGNITION IN SPARK-IGNITED INTERNAL COMBUSTION ENGINES
TECHNICAL FIELD
[001] This disclosure relates to fuel and lubricant compositions for spark-
ignited engines and methods for preventing or reducing low speed pre-ignition
events
using the same.
BACKGROUND
[002] Turbocharged or supercharged engines (i.e., boosted internal
combustion engines) may exhibit an abnormal combustion phenomenon known as
stochastic pre-ignition or low-speed pre-ignition (or "LSPI"). LSPI is an
event that may
include very high pressure spikes, early combustion during an inappropriate
crank
angle, and knock. All of these, individually and in combination, have the
potential to
cause degradation and/or severe damage to the engine. However, because LSPI
events occur only sporadically and in an uncontrolled fashion, it is difficult
to identify
the causes for this phenomenon and to develop solutions to suppress it.
[003] Pre-ignition is a form of combustion that results in ignition of the air-
fuel
mixture in the combustion chamber prior to the desired ignition of the air-
fuel mixture
by the igniter. Pre-ignition has typically been a problem during high load
engine
operation since heat from operation of the engine may heat a part of the
combustion
chamber to a sufficient temperature to ignite the air-fuel mixture upon
contact. This
type of pre-ignition is sometimes referred to as hot-spot pre-ignition.
[004] More recently, intermittent abnormal combustion has been observed in
boosted internal combustion engines at low speeds and medium-to-high loads.
For
example, during operation of the engine at 3000 rpm or less, under load, with
a brake
mean effective pressure (BMEP) of at least 10 bar, low-speed pre-ignition
(LSPI) may
occur in a random and stochastic fashion. During low speed engine operation,
the
compression stroke time is longest.
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[005] Previous studies have demonstrated that turbocharger use, engine
design, engine coatings, piston shape, fuel choice, and/or engine oil
additives may
contribute to an increase in LSPI events. Accordingly, there is a need for
fuel and
engine oil additive components and/or combinations that are effective to
reduce or
eliminate LSPI.
SUMMARY
[006] In one aspect, there is provided a fuel composition comprising (1)
greater
than 50 wt % of a hydrocarbon fuel boiling in the gasoline or diesel range and
(2) a
minor amount of one or more of: a primary low-speed pre-ignition (LSPI)-
reducing
additive comprising (i) an amino additive, (ii) an amine additive, (iii) a
triazole additive,
(iv) a benzamidinium additive, (v) a benzoxazole additive, or (vi) a N=C-X
motif additive
R
N
>c
Xi X2
having a structure of , wherein
Xi and X2 are independently H, C, N,
0, or S; and wherein Xi or X2 independently includes one or more Ci-C20 alkyl
group
or one or more aromatic group.
[007] In another aspect, there is provided a fuel concentrate comprising (1)
from 90 to 30 wt % of an organic solvent boiling in a range of from 65 C to
205 C and
(2) from 10 to 70 wt % of an additive component selected from one or more of
(i) an
amino additive, (ii) an amine additive, (iii) a triazole additive, (iv) a
benzamidinium
additive, (v) a benzoxazole additive, or (vi) a N=C-X motif additive having a
structure
R
N
X1 X2
of , wherein
Xi and X2 are independently H, C, N, 0, or S; and wherein
Xi or X2 independently includes one or more Ci -C20 alkyl group or one or more
aromatic group.
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[008] In a further aspect, there is provided a lubricating oil composition
comprising (1) greater than 50 wt % of a base oil and (2) 0.01 to 15 wt % of a
component selected from one or more of a primary low-speed pre-ignition (LSPI)-
reducing additive comprising (i) an amino additive, (ii) an amine additive,
(iii) a triazole
additive, (iv) a benzamidinium additive, (v) a benzoxazole additive, or (vi) a
N=C-X
R
N
Xi X2
motif additive having a structure of , wherein Xi and X2 are
independently H, C, N, 0, or S; and wherein Xi or X2 independently includes
one or
more Ci -C20 alkyl group or one or more aromatic group.
DETAILED DESCRIPTION
Introduction
[009] In this specification, the following words and expressions, if and when
used, have the meanings ascribed below.
[010] "Gasoline" or "gasoline boiling range components" refers to a
composition containing at least predominantly C4-C12 hydrocarbons. In one
embodiment, gasoline or gasoline boiling range components is further defined
to refer
to a composition containing at least predominantly C4-C12 hydrocarbons and
further
having a boiling range of from about 100 F (37.8 C) to about 400 F (204 C). In
an
alternative embodiment, gasoline or gasoline boiling range components is
defined to
refer to a composition containing at least predominantly C4-C12 hydrocarbons,
having
a boiling range of from about 100 F (37.8 C) to about 400 F (204 C), and
further
defined to meet ASTM D4814.
[011] The term "diesel" refers to middle distillate fuels containing at least
predominantly Cio-C25 hydrocarbons. In one embodiment, diesel is further
defined to
refer to a composition containing at least predominantly Cio-C25 hydrocarbons,
and
further having a boiling range of from about 165.6 C (330 F) to about 371.1 C
(700 F).
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In an alternative embodiment, diesel is as defined above to refer to a
composition
containing at least predominantly Cio-C25 hydrocarbons, having a boiling range
of
from about 165.6 C (330 F) to about 371.1 C (700 F), and further defined to
meet
ASTM D975.
[012] The term "oil soluble" means that for a given additive, the amount
needed to provide the desired level of activity or performance can be
incorporated by
being dissolved, dispersed or suspended in an oil of lubricating viscosity.
Usually, this
means that at least 0.001% by weight of the additive can be incorporated in a
lubricating oil composition. The term "fuel soluble" is an analogous
expression for
additives dissolved, dispersed or suspended in fuel.
[013] The term "alkyl" refers to saturated hydrocarbon groups, which can be
linear, branched, cyclic, or a combination of cyclic, linear and/or branched.
[014] An "alkanol" is an alkyl group, as described herein, having a hydroxy
substituent (i.e., an ¨OH group).
[015] A "minor amount" means less than 50 wt % of a composition, expressed
in respect of the stated additive and in respect of the total weight of the
composition,
reckoned as active ingredient of the additive.
[016] An "analog" is a compound having a structure similar to another
compound but differing from it in respect to a certain component such as one
or more
atoms, functional groups, substructures, which are replaced with other atoms,
groups,
or substructures.
[017] A "homolog" is a compound belonging to a series of compounds that
differ from each other by a repeating unit. Alkanes are examples of homologs.
For
example, ethane and propane are homologs because they differ only in the
length of
a repeating unit (-CH2-). A homolog may be considered a specific type of
analog.
[018] A "derivative" is a compound that is derived from a similar compound
via a chemical reaction (e.g., acid-base reaction, hydrogenation, etc.). In
the context
of substituent groups, a derivative may be a combination of one or more
moiety. For
example, a phenol moiety may be considered a derivative of aryl moiety and
hydroxyl
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moiety. A person of ordinary skill in the related art would know the metes and
bounds
of what is considered a derivative. The term "substituted" refers to a
substitution or
replacement of an atom or atoms of a compound. As an illustrative example, a
"substituted alkyl group" may refer to, among other things, an ethanol.
[019] An "engine" or a "combustion engine" is a heat engine where the
combustion of fuel occurs in a combustion chamber. An "internal combustion
engine"
is a heat engine where the combustion of fuel occurs in a confined space
("combustion
chamber"). A "spark ignition engine" is a heat engine where the combustion is
ignited
by a spark, usually from a spark plug. This is contrast to a "compression-
ignition
engine," typically a diesel engine, where the heat generated from compression
together with injection of fuel is sufficient to initiate combustion without
an external
spark.
Low Speed Pre-Ignition (LSPI)
[020] Low Speed Pre-Ignition (LSPI) is most or more likely to occur in direct-
injected, boosted (turbocharged or supercharged), spark-ignited (gasoline)
internal
combustion engines that, in operation, generate a brake mean effective
pressure level
of greater than 1000 kPa (10 bar) at engine speeds of from 1500 to 2500
rotations per
minute (rpm), such as at engine speeds of from 1500 to 2000 rpm. "Brake mean
effective pressure" (BMEP) is defined as the work accomplished during on
engine cycle,
divided by the engine swept volume, the engine torque normalized by engine
displacement. The word "brake" denotes the actual torque or power available at
the
engine flywheel, as measured on a dynamometer. Thus, BMEP is a measure of the
useful energy output of the engine.
[021] It has now been found that the fuel compositions or lubricating oil
compositions of this disclosure which are particularly useful in high pressure
spark-
ignited internal combustion engines and, when used in the high-pressure spark-
ignited internal combustion engines, will prevent or minimize engine knocking
and
pre-ignition problems.
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Primary LSPI-Reducing Additives
[022] The following are descriptions of primary additives that can be utilized
as a fuel or lubricant additive to reduce LSPI activity. Primary LSPI-reducing
additives
can be used as standalone additives and/or with other primary additive(s)
and/or with
of one or more secondary LSPI-reducing additive (described later). When more
than
one additive is used, the additives may be in salt form. Moreover, when two or
more
additives are used, there may be synergy between the two or more additives. In
general, these additives are fuel or oil soluble at concentrations needed to
achieved a
desired LSPI reduction level. Table 1 summarizes the primary additive types.
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Table 1
Primary Additive Types
1. Amino Additives
Beta-amino alkanol
Amino acid
Amino ester
2. N=C-X Motif Additives
Amidine
Guanidine
Imidazole
Benzamidine
Benzamidazole
Aminobenzimidazole
3. Triazole Additives
4. Benzamidium Additives
5. Benzoxazole Additives
6. Amine Additives
Aromatic amine
Aliphatic amine
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1. Amino Additives
p-Amino Alkanol
[023] The fuel additive or lubricating oil additive of this disclosure may be
a 13-
amino alkanol, a substituted 13-amino alkanol, a derivative thereof or an
acceptable salt
thereof. Useful 13-amino alkanols include those that can be represented by the
following general formula:
Rµl N 1 f R3 ,OH
/
R2 R4
Formula 1
wherein R1, R2, R3, and R4 are each independently selected from hydrogen and a
Ci -
C20 alkyl (e.g., Ci-C6 alkyl) group; and two or more of Ri, R2, R3, and R4
optionally can
be bonded together to form a ring structure (e.g., a five-, six-, or seven-
membered
ring). In some embodiments, R1, R2, R3, and R4 may independently include one
or more
aromatic rings.
[024] The 13-amino alkanol has at least 2 carbon atoms (e.g., from 4 to 30
carbon atoms, from 4 to 20 carbon atoms, from 4 to 16 carbon atoms, from 4 to
12
carbon atoms, from 5 to 30 carbon atoms, from 5 to 20 carbon atoms, from 5 to
16
carbon atoms, or from 5 to 12 carbon atoms).
[025] Representative examples of suitable 13-amino alkanols include
ethanolamine (Formula 1A), 1-amino-2-propanol (Formula 1B), alaninol (Formula
1C), 2-(methylamino)ethanol (Formula 1D), 2-(ethylamino)ethanol (Formula 1E),
2-
amino-2-methyl-1-propanol (Formula 1F), 2-amino-1-butanol (Formula 1G), 2-
amino-1-pentanol (Formula 1H), valinol (Formula 11), 2-amino-1-hexanol
(Formula
1.1), leucinol (Formula 1K), isoleucinol (Formula 1L), cycloleucinol (Formula
1M),
cyclohexylglycinol (Formula 1N), prolinol (Formula 10), 2-
(hydroxymethyl)piperidine
(Formula 1P), 2-aminocyclopentanol (Formula 1Q), and 2-aminocyclohexanol
(Formula 1R). Representative structures are shown below.
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OH
OH H2Nj
H2N
OH H2N
Formula lA Formula 1B Formula 1C
H H
N kOH
OH . OH H2N
Formula 1D Formula lE Formula 1F
H2N
OH
NH H2N
OH
10H
_____
Formula 1G Formula 1H Formula 11
NH2
NH2
NH2 1.0H
)0 OH H
Formula 1J Formula 1K Formula 1L
OH
H21\1
H2N
6.-----OH ..----) /OH
N
H
Formula 1M Formula 1N Formula 10
H aOH
N R¨NH2
OH
OH NH2
Formula 1P Formula 1Q Formula 1R
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OH
H2N
0
Formula 1S
Amino Acid
[026] The fuel additive or lubricating oil additive of this disclosure may be
an
aliphatic amino acid, a substituted aliphatic amino acid, or a derivative
thereof, or an
acceptable salt thereof. Useful amino acids include those that can be
represented by
the following general formula:
H
H 0
z\N 1 <
H
R OH
Formula 2
wherein R is an "aliphatic" or "aromatic" side chain. Amino acid side chains
can be
broadly classified as aromatic or aliphatic. An aromatic side chain includes
an aromatic
ring. Examples of amino acids with aromatic side chains include for example,
histidine
(Formula 2A), phenylalanine (Formula 2B), tyrosine (Formula 2C), tryptophan
(Formula 2D) and the like. Non-aromatic side chains are broadly grouped as
"aliphatic" and include, for example, alanine (Formula 2E), glycine (Formula
2F),
cysteine (Formula 2G), and the like.
[027] The amino acid(s) can be natural and/or non-natural a-amino acids.
Natural amino acids are those encoded by the genetic code, as well as amino
acids
derived therefrom. These include, for example, hydroxyproline (Formula 2H), y-
carboxyglutamate (Formula 21), and citrulline (Formula 2J). In this
specification, the
term "amino acid" also includes amino acid analogs and mimetics. Analogs are
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compounds having the same general structure of a natural amino acid, except
that the
R group is not one found among the natural amino acids.
[028] Representative examples of analogs of naturally occurring amino acids
include homoserine (Formula 2K), norleucine (Formula 2L), homoproline (Formula
2M) and proline (Formula 2N). An amino acid mimetic is a compound that has a
structure different from the general chemical structure of an a-amino acid but
functions in a manner similar to one. The amino acid may be an L- or D-amino
acid.
Representative structures are shown below.
0 0
e...)=1
OH OH
HN N H2 NH2
Formula 2A Formula 2B
rl
0 0 /
NH2
OH
HO
NH2 OH
0
Formula 2C Formula 2D
0
0
i)OH
H2NJL
NH2 OH
Formula 2E Formula 2F
0
0
HSOH OH
NH2 OH
Formula 2G Formula 2H
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0 0
0 0
HO)H)LOH
H2N)Lm
.(OH
N H2
0 OH N H2
Formula 21 Formula 2J
0 0
HO.L
OH 1)LOH
NH2 NH2
Formula 2K Formula 2L
0
0
OH
d(OH
NH
Formula 2M Formula 2N
Amino Ester
[029] The fuel additive or lubricating oil additive of this disclosure may be
an
amino ester, a substituted amino ester, or a derivative thereof, or an
acceptable salt
thereof. Amino esters can be derived from amino acids (as described above) and
alcohols. Amino esters and amino acids may be considered derivatives of each
other.
Useful amino esters include those that can be represented by the following
general
formula:
H
H 0
> 1 <
H
R ORi
Formula 3
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wherein R is an aliphatic side chain and Ri is a carbon chain 1 to 20 carbon
atoms in
length, preferably 1 to 4 carbon atoms, in particular, methanol or ethanol,
preferably
methanol.
[030] The amino esters may include aromatic or aliphatic side chains.
Representative examples of amino esters include methyl alaninate (Formula 3A),
ethyl
alaninate (Formula 3B), methyl glycinate (Formula 3C), and ethyl glycinate
(Formula
3D). Representative structures are shown below.
0 0
YL,D YLO
NH2 NH2
Formula 3A Formula 3B
0 0
H2N H2N JL
0 0
Formula 3C Formula 3D
2. N=C-X Motif Additives
[031] A fuel additive or lubricating oil additive of this disclosure may have
a
N=C-X motif as shown in the generalized structure below
NR
X1 X2
Formula 4
wherein R is H, monovalent organic group, or monovalent heterorganic group
(described in greater detail below), Xi and X2 are independently H, C, N, 0,
or S and
wherein Xi or X2 independently includes one or more Ci-C20 alkyl group (e.g.,
C1-C6
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alkyl) or one or more aromatic ring. In some embodiments, Xi and X2 may
include a
cyclic structure (e.g., a five-, six-, or seven-membered ring). Cyclic
structures may be
aromatic or non-aromatic, as well as vary from being fully saturated to fully
unsaturated. Suitable examples of additives compatible with Formula 4 include
amidines, guanidines, imidazoles, benzamidines,
benzimidazoles, and
aminobenzimidazoles.
Amidine
[032] The fuel additive or lubricating oil additive of this disclosure may be
an
amidine, a substituted amidine, or a derivative thereof or an acceptable salt
thereof.
Useful amidines include those that can be represented by the following general
formula:
N R8
R5...... .....1.4.4.
N R7
I
R6
Formula 5
wherein R5, R6, R7 and R8 are each independently selected from hydrogen,
monovalent
organic groups, monovalent heterorganic groups (e.g., comprising nitrogen,
oxygen,
sulfur or phosphorus, in the form of groups or moieties that are bonded
through a
carbon atom and that do not contain acid functionality such as carboxylic or
sulfonic),
and combinations thereof; and wherein any two or more of R5, R6, R7 and R8
optionally
can be bonded together to form a cyclic structure (e.g., a five-, six, or
seven-membered
ring). The cyclic structures may be aromatic or non-aromatic, as well as vary
from
being fully saturated to fully unsaturated. The organic and heterorganic
groups may
have from 1 to 10 carbon atoms (e.g., 1 to 6 carbon atoms).
[033] Representative examples of suitable amidines include 1,4,5,6-
tetrahydropyri midine (Formula 5A), 1,2-dimethy1-1,4,5,6-
tetrahydropyrimidine
(Formula 5B), 1,2-diethyl-1,4,5,6-tetrahydropyrimidine (Formula 5C), 1,5-
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diazabicyclo[4.3.0]non-5-ene (DBN; Formula 5D), 1,8-diazabicyclo[5.4.0]-undeca-
7-
ene (DBU; Formula 5E), benzamidine (Formula 5F), benzimidazole (Formula 5G)
and
2-phenyl-1H-benzo[d]imidazole (Formula 5M). Representative structures are
shown
below.
NH N N
N
Formula 5A Formula 5B Formula 5C
NH
No N%10
N N
* NH2
Formula 5D Formula 5E Formula 5F
H
0.__.
*
c)o-.--NH2 C I NH2
\--N N
Formula 5G Formula 5H Formula 51
Sy NH2
(s)....--NH2 (s)....-- NE12
4Ik 4
\--N \ __ N
Formula 5J Formula 5K Formula 5L
001 N\ *
N
H
Formula 5M
Guanidine
[034] The fuel additive or lubricating oil additive of this disclosure may be
a
guanidine, a substituted guanidine, or a derivative thereof, or an acceptable
salt
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thereof. Useful guanidines include those that can be represented by the
following
general formula,
Ri3
N
R9 )( N N ,õ,. R12
1 1
R10 R11
Formula 6
wherein R9, R10, R11, R12 and R13 are each independently selected from
hydrogen,
monovalent organic groups, monovalent heterorganic groups (e.g., comprising
nitrogen, oxygen, sulfur or phosphorus, in the form of groups or moieties that
are
bonded through a carbon atom and that do not contain acid functionality such
as
carboxylic or sulfonic), and combinations thereof; and wherein any two or more
of R9,
Rio, R11, R12 and R13 optionally can be bonded together to form a cyclic
structure (e.g.,
a five-, six, or seven-membered ring). The cyclic structures may be aromatic
or non-
aromatic, as well as vary from being fully saturated to fully unsaturated. The
organic
and heterorganic groups may have from 1 to 10 carbon atoms (e.g., 1 to 6
carbon
atoms).
[035] Representative examples of suitable guanidines include 1,1,3,3-
tetramethylguanidine (TMG; Formula 6A), 2-tert-butyl-1,1,3,3-
tetramethylguanidine
(BTMG; Formula 66), 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD; Formula 6C), 7-
methyl-
1,5,7-triazabicyclo[4.4.0]dec-5-ene (MTBD; Formula 6D) and 1,2-
diphenylguanidine
(Formula 61). Representative structures shown below.
NH I
N N
I I .,..==== N ==,....
Formula 6A Formula 6B
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N
H I
Formula 6C Formula 6D
N
0
H a,
N_ N N
NH2 I I
H 0
Formula 6E Formula 6F
H
N N R
* I'
NH
H2NiL N.-------T¨OH N
I
CH3 0 CH3
Formula 6G Formula 6H
0 NH2 0
N N
H
Formula 61
lmidazoles
[036] The fuel additive or lubricating oil additive of this disclosure may be
an
imidazole, a substituted imidazole, or a derivative thereof, or an acceptable
salt
thereof. Suitable imidazoles include imidazole (Formula 7A), 1-methylimidazole
(Formula 7B), 1-ethylimidazole (Formula 7D), 1-propylimidazole (Formula 7E), 1-
n-
butylimidazole (Formula 7F), 1-decylimidazole, 1-dodecylimidazole, 2-
methylimidazole (Formula 7G), 2-ethylimidazole, 2-isopropylimidazole (Formula
7H),
4-methylimidazole (Formula 71), 1,2-dimethylimidazole (Formula 7J), 2-ethyl-
4(5)-
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methylimidazole (Formula 7K), and 1-vinylimidazole (Formula 7L).
Representative
structures are shown below.
(-3
.NN--. Nll
N
H N=i
Formula 7A Formula 7B Formula 7C
Nil Ni Ni
Formula 7D Formula 7E Formula 7F
H
µX N 0 N N
----.
N HN---1 HN
Formula 7G Formula 7H Formula 71
H
N
ei, N ) N1
N
Formula 7J Formula 7K Formula 7L
3. Triazole Additives
[037] The fuel additive or lubricating oil additive of this disclosure may be
a
triazole, a substituted triazole, or a derivative thereof, or an acceptable
salt thereof.
Suitable triazoles include 1, 2, 3-triazole (Formula 8A), 5,6-
dimethylbenzotriazole
(Formula 88), and 1, 2, 4-triazole (Formula 8C). Representative structures are
shown
below.
0i¨NH 0 N,
,
N N
N H
Formula 8A Formula 8B
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HN(...
NH
r \
/NH
\
NN
N*N
Formula 8C Formula 8D
4. Benzamidinium Additives
[038] The fuel additive or lubricating oil additive of this disclosure may be
a
benzamidinium, a substituted benzamidinium, or a derivative thereof, or an
acceptable
salt thereof. Useful benzamidinium additives include those that can be
represented
by the following general formula 9, wherein Ri, R2, and R3 are independently
Ci-C20
alkyl groups.
0-
Ri R
0 `N C 2
R3
0
Formula 9
[039] Suitable benzamidiniums include N,N-dimethyl-N-octylbenzamidium-2-
oxide (Formula 9A). Representative structures are shown below.
101
0
N
c)
o
Formula 9A
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e e
I/ I.
N N
e e
0 0
Formula 9B Formula 9C
5. Benzoxazole Additives
[040] The fuel additive or lubricating oil additive of this disclosure may be
a
benzoxazole, a substituted benzoxazole, or a derivative thereof, or an
acceptable salt
thereof. Suitable benzoxazoles include benzoxazole (Formula 10A) and 2-
aminobenzoxazole (Formula 10B). Representative structures are shown below.
) 0
. ON(NH2 N NI
0
Formula 10A Formula 10B
6. Amine Additives
Aromatic amine
[041] The fuel additive or lubricating oil additive of this disclosure may be
an
aromatic amine, a substituted aromatic amine, or a derivative thereof, or an
acceptable
salt thereof. Aromatic amine additives can have the generalized structure
shown in
Formula 11-1 or 11-2,
R
rN N
X
X
Formula 11-1 Formula 11-2
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wherein R is independently one or more H or Ci-C20 alkyl group and X is N
(e.g., R-N-
R) or 0 .
[042] Suitable aromatic amines include 2-methylquinolin-8-amine (Formula
11A). Representative structures are shown below.
rNhi2
N
NH2 N
Formula 1 lA Formula 11B
N
H2N
Formula 11C
Aliphatic amine
[043] Suitable aliphatic amines are shown below.
HN
H2N/.\/
Formula 12A Formula 12B
HN/\/
H2N
10 *
Formula 12C Formula 12D
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Secondary LSPI-Reducing Additives
[044] The following are descriptions of secondary LSPI-reducing additives that
can be utilized as fuel or lubricating additives to reduce LSPI activity. In
general, a
secondary LSPI-reducing additive, a substituted secondary LSPI-reducing
additive, or
a derivative thereof will be used in their salt form and in combination with a
primary
additive to reduce LSPI activity. For example, 8-amino alkanol (primary
additive) and
aliphatic acid (secondary additive) can be combined and utilized as an LSPI
additive.
Table 2 lists the secondary additive types. Some additives can act as a
primary additive
and/or secondary additive.
Table 2
Secondary Additive Types
7. Acid Additives
Aliphatic acid
Unsaturated acid
Alkylaromatic acid
Aromatic acid
Hydroxy acid
Amino acid
8. Phenol Additives
9. 1, 3 Dicarbonyl Additives
1,3 Diketone
1,3 Ketoester
10. Hydroxamide Additives
11. Antioxidant Additives
12. Salicylate Additives
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7. Acid Additives
Aliphatic Acid
[045] Aliphatic acids are non-aromatic carboxylic acids. Suitable aliphatic
acids
include mono-carboxylic acids having the following structure
0
R)\
OH
Formula 13
wherein R is an aliphatic group having between 2 to 20 carbon atoms. The
aliphatic
group may be linear or branched and may contain heteroatoms.
[046] Suitable aliphatic acids include hexanoic acid (Formula 13A), heptanoic
acid (Formula 13B), octanoic acid (Formula 13C), nonanoic acid (Formula 13D),
decanoic acid (Formula 13E), undecanoic acid, lauric acid, myristic acid,
palmitic acid,
stearic acid, arachidic acid (C20), behenic acid (C22), 2-ethylbutyric acid
(Formula 13F),
3,3-dimethylbutyric acid, 2-methylpentanoic acid (C6), 2-methylhexanoic acid
(C7), 4-
methylhexanoic acid (C7), 5-methylhexanoic acid (C7), 2,2-dimethylpentanoic
acid (C7),
2-propylpentanoic acid (Cs), 2-ethylhexanoic acid (Formula 13G), 2-
methylheptanoic
acid (Cs), isooctanoic acid (Cs), 3,5,5-trimethylhexanoic acid (C9), 4-
methyloctanoic acid
(C9), 4-methylnonanoic acid, (C10), isodecanoic acid (C10), 2-butyloctanoic
acid (C12),
isotridecanoic acid (C13), 2-hexyldecanoic acid (C16), isopalmitic acid (C16),
isostearic
acid (Formula 13H), 3-cyclohexylpropionic acid, 4-cyclohexylbutyric acid
(Formula
131), and cyclohexanepentanoic acid. Representative structures are shown
below.
0 0
LOH )LOH
Formula 13A Formula 13B
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0 0
LOH OH
Formula 13C Formula 13D
0
0 LOH
OH
Formula 13E Formula 13F
0
LOH
Formula 13G
0
OH
Formula 13H
0
0)LOH (n)LOH
Formula 131 Formula 13J
Unsaturated Acid
[047] Suitable unsaturated acids include any organic acids that contain double
or triple carbon-carbon bond. Representative unsaturated acids include maleic
acid
(Formula 14A), fumaric acid (Formula 14B), as well as unsaturated fatty acids
such as
palmitoleic acid (Formula 14C) and oleic acid (Formula 14D). Representative
structures are shown below.
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0
0
HO)L
OH
HO.)3L
OH 0
Formula 14A Formula 14B
0
_
OH
Formula 14C
0
¨
OH
Formula 14D
Allwlaromatic Acid
[048] Suitable alkylaromatic acids include both mono-carboxylic acids and
dicarboxylic acids. The alkyl carboxylic acid may have 6 or more carbon atoms
(e.g., 6
to 24 carbon atoms, 6 to 20 carbon atoms, 8 to 24 carbon atoms, 8 to 20 carbon
atoms,
or even 8 to 18 carbon atoms). The alkyl moiety may be optionally substituted
with
one or more substituents such as hydroxy, alkoxy and carbonyl (e.g., aldehydic
or
ketonic) groups. Suitable examples of alkylaromatic acid include methylbenzoic
acid
(Formula 15A) and ethylbenzoic acid (Formula 15B). Representative structures
are
shown below.
0 0
* OH OH 0
OH
Formula 15A Formula 15B Formula 15C
Aromatic Acid
[049] Suitable aromatic acids include both mono-carboxylic acids and
dicarboxylic acids. The alkyl carboxylic acid may have 6 or more carbon atoms
(e.g., 6
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to 24 carbon atoms, 6 to 20 carbon atoms, 8 to 24 carbon atoms, 8 to 20 carbon
atoms,
or even 8 to 18 carbon atoms). The alkyl moiety may be optionally substituted
with
one or more substituents such as hydroxy, alkoxy and carbonyl (e.g., aldehydic
or
ketonic) groups. Suitable aromatic acids include benzoic acid (Formula 16A),
hydroxybenzoic acid (Formula 166), and tetralin carboxylic acid (Formula 16C).
Representative structures are shown below.
0 0 0
1 0 OH 401 OH OH
Formula 16A Formula 16B Formula 16C
Hydroxy Acid
[050] Suitable hydroxy acids include those that can be represented by the
following general formula:
0H 0
H-liTiLsµ OH
Formula 17
wherein n = 1 to 3. Suitable examples of hydroxy acid include glycolic acid
(Formula
17A), lactic acid (Formula 176), malic acid (Formula 17C), tartaric acid
(Formula 17D),
and citric acid (Formula 17E). Representative structures are shown below.
0 0
HOJL HO L
y
0 yyL OH OH
OH OH 0 OH
Formula 17A Formula 17B Formula 17C
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OH 0 0 OH
0 0
HO(/yL
OH
HO)LOH
0 OH OH
Formula 17D Formula 17E
Amino Acid
[051] Amino acids can be utilized as primary and/or secondary additives.
Suitable amino acids were previously described above.
8. Phenol Additives
Phenol
[052] Suitable phenols include, thymol (Formula 18A), eugenol (Formula
188), hydroquinone (Formula 18C), resorcinol (Formula 18D), cresol (Formula
18E)
and 2-methylquinolin-8-ol (Formula 18G). Representative structures are shown
below.
0 OH
HO * OH
0 HO
Formula 18A Formula 18B Formula 18C
OH
HO * OH 0
*
OH
Formula 18D Formula 18E Formula 18F
/
N
OH
Formula 18G
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9. 1,3 Dicarbonyl Additives
1, 3 Diketone
[053] Suitable examples of 1,3 diketone compounds include acetylacetone
(Formula 19A)õ and curcumin (Formula 19B). Representative structures are shown
below.
))0 0
Formula 19A
o/
0
HOI OH
I I
0 0
Formula 19B
1,3 Ketoester
[054] Suitable 1,3 ketoesters are shown below.
0
0()
0 0
io))
Formula 20A Formula 20B
10. Hydroxamide Additives
[055] A hydroxamide is a hydroxy derivative of an amide. Useful hydroxamides
include those that can be represented by the following general formula:
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0
Ri---N.--1---or-..
2
1
OH
Formula 21
wherein Ri and R2 are each independently selected from hydrogen or Ci-C20
(e.g., C3-
C12) alkyl group. Suitable hydroxamide includes hydroxy methylacetamide
(Formula
21A). Representative structures are shown below.
0 0 0
N N )LN
i 1 I
OH OH OH
Formula 21A Formula 21B Formula 21C
11. Antioxidant Additives
[056] Suitable antioxidants include both mono-carboxylic acids and
dicarboxylic acids. The alkyl carboxylic acid may have 6 or more carbon atoms
(e.g., 6
to 24 carbon atoms, 6 to 20 carbon atoms, 8 to 24 carbon atoms, 8 to 20 carbon
atoms,
or even 8 to 18 carbon atoms). The alkyl moiety may be optionally substituted
with
one or more substituents such as hydroxy, alkoxy and carbonyl (e.g., aldehydic
or
ketonic) groups. Suitable antioxidants include the following.
OH
0 OH
Formula 22A
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12. Salicylate Additives
Salicylate
[057] Suitable salicylates include 2-hydroxy-5-
(tetracosa-
1,3,5,7,9,11,13,15,17,19,21,23-dodecayn-1-yl)benzoic acid--dihydrogen (Formula
23E). Suitable salicylates are shown below.
o o OH o
10 0
0 C)
* 0
OH OH OH
Formula 23A Formula 23B Formula 23C
OH 0 OH 0
101 OH
* OH
012H25 C24H49
Formula 23D Formula 23E
Salts
[058] The salts of this disclosure may be prepared by conventional means, for
example, by mixing the primary additive with a suitable secondary additive in
an
aprotic solvent. The order in which one additive is added to the other is not
important.
The primary additive and secondary additive are usually mixed together in an
approximately equimolar ratio. An excess of the primary or secondary additive
component may be used. For example, the molar ratio of base relative to the
alkyl
carboxylic acid may be about 1.05:1 to 2:1 (e.g., 1.1:1 to 1.5:1).
Representative salts are
shown below.
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0
Formula 24A
Formula 24B
H H
IN
(H3C)2N N(CH3)2
Formula 24C
0
I
Formula 24D
0
/Nh
OH
H H
Formula 24E
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0
NH3
oW
Formula 24F
, o
+ Me oW
N/
,
3
Formula 24G
H
I+ 0
0'..........D
Formula 24H
o
H oW
OH
Formula 241
*1
o o
=,,,....õ.õ,,,,N
Formula 24J
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H
' 1
0 NZD
_
0
....,..............,N
Formula 24K
H
I. 0
Cõ:õ..........õ...,N,.........
_
0
Nõ..,...........
Formula 24L
H
1*
C.4...1õ..,N,..,...,
o-
N.,..,........
o
Formula 24M
_
o H
* I
........, N...... .,...,,,,0
..............õ,õ, N
Formula 24N
o
,
H
'.............LOCH3 ....../N-
,.....õ
0
....,......,,,,, N
0
Formula 240
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OH
FN
Z.DN
-
0 o
Formula 24P
H 0
I*
N......,,,..õ OH
Formula 24Q
H
0 0 + 1
N/D0 ...%.%µ.........õN
Formula 24R
H 0
I +
C.....,..õ ,.......N......... ON........."........õ.õ.õ.".........%
H
N,...........õ,õ,
Formula 24S
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0
H
a \N+:1) OW
1
NN
I
H .,..,,.........,,.0
Formula 24T
\
0 0
+H2N N -----.
0
N N
Formula 24U
0 H
.1
N
0
N
* _
0
Formula 24V
OH 0 H
I.
* 0_ C,
N
012H25
Formula 24W
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OH
H H
\ + /
N
)L
(H3C)2N N(C1-13)2
0 0
Formula 24X
OH
e
()
H2N
OH
0
Formula 24Y
Y+ 0
00
N
0
_
Formula 24Z
H OH
1+
C N
0 CO2 rj
C24H49
Formula 24AA
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Fuel Compositions
[059] The compounds of the present disclosure may be useful as additives in
hydrocarbon fuels to prevent or reduce engine knock or pre-ignition events in
spark-
ignited internal combustion engines.
[060] The concentration of the compounds of the present disclosure in
hydrocarbon fuel may range from 25 to 5000 parts per million (ppm) by weight
(e.g.,
50 to 1000 ppm).
[061] The compounds of the present disclosure may be formulated as a
concentrate using an inert stable oleophilic (i.e., soluble in hydrocarbon
fuel) organic
solvent boiling in a range of 65 C to 205 C. An aliphatic or an aromatic
hydrocarbon
solvent may be used, such as benzene, toluene, xylene, or higher-boiling
aromatics or
aromatic thinners. Aliphatic alcohols containing 2 to 8 carbon atoms, such as
ethanol,
isopropanol, methyl isobutyl carbinol, n-butanol and the like, in combination
with the
hydrocarbon solvents are also suitable for use with the present additives. In
the
concentrate, the amount of the additive may range from 10 to 70 wt % (e.g., 20
to 40
wt %).
[062] In gasoline fuels, other well-known additives can be employed including
oxygenates (e.g., ethanol, methyl tert-butyl ether), other anti-knock agents,
and
detergents/dispersants (e.g., hydrocarbyl amines, hydrocarbyl
poly(oxyalkylene)
amines, succinimides, Mannich reaction products, aromatic esters of
polyalkylphenoxyalkanols, or polyalkylphenoxyaminoalkanes). Additionally,
friction
modifiers, antioxidants, metal deactivators and demulsifiers may be present.
[063] In diesel fuels, other well-known additives can be employed, such as
pour
point depressants, flow improvers, cetane improvers, and the like.
[064] A fuel-soluble, non-volatile carrier fluid or oil may also be used with
compounds of this disclosure. The carrier fluid is a chemically inert
hydrocarbon-
soluble liquid vehicle which substantially increases the non-volatile residue
(NVR), or
solvent-free liquid fraction of the fuel additive composition while not
overwhelmingly
contributing to octane requirement increase. The carrier fluid may be a
natural or
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synthetic oil, such as mineral oil, refined petroleum oils, synthetic
polyalkanes and
alkenes, including hydrogenated and unhydrogenated polyalphaolefins, synthetic
polyoxyallwlene-derived oils, such as those described in U.S. Patent Nos.
3,756,793;
4,191,537; and 5,004,478; and in European Patent Appl. Pub. Nos. 356,726 and
382,159.
[065] The carrier fluids may be employed in amounts ranging from 35 to 5000
ppm by weight of the hydrocarbon fuel (e.g., 50 to 3000 ppm of the fuel). When
employed in a fuel concentrate, carrier fluids may be present in amounts
ranging from
20 to 60 wt % (e.g., 30 to 50 wt %).
Lubricating Oil Compositions
[066] The compounds of the present disclosure may be useful as additives in
lubricating oils to prevent or reduce engine knock or pre-ignition events in
spark-
ignited internal combustion engines.
[067] The concentration of the compounds of the present disclosure in the
lubricating oil composition may range from 0.01 to 15 wt % (e.g., 0.5 to 5 wt
%), based
on the total weight of the lubricating oil composition.
[068] The oil of lubricating viscosity (sometimes referred to as "base stock"
or
"base oil") is the primary liquid constituent of a lubricant, into which
additives and
possibly other oils are blended, for example to produce a final lubricant (or
lubricant
composition). A base oil, which is useful for making concentrates as well as
for making
lubricating oil compositions therefrom, may be selected from natural
(vegetable,
animal or mineral) and synthetic lubricating oils and mixtures thereof.
[069] Definitions for the base stocks and base oils in this disclosure are the
same as those found in American Petroleum Institute (API) Publication 1509
Annex E
("API Base Oil Interchangeability Guidelines for Passenger Car Motor Oils and
Diesel
Engine Oils," December 2016). Group I base stocks contain less than 90%
saturates
and/or greater than 0.03% sulfur and have a viscosity index greater than or
equal to
80 and less than 120 using the test methods specified in Table E-1. Group II
base stocks
contain greater than or equal to 90% saturates and less than or equal to 0.03%
sulfur
and have a viscosity index greater than or equal to 80 and less than 120 using
the test
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methods specified in Table E-1. Group III base stocks contain greater than or
equal to
90% saturates and less than or equal to 0.03% sulfur and have a viscosity
index greater
than or equal to 120 using the test methods specified in Table E-1. Group IV
base
stocks are polyalphaolefins (PAO). Group V base stocks include all other base
stocks
not included in Group I, II, Ill, or IV.
[070] Natural oils include animal oils, vegetable oils (e.g., castor oil and
lard
oil), and mineral oils. Animal and vegetable oils possessing favorable thermal
oxidative
stability can be used. Of the natural oils, mineral oils are preferred.
Mineral oils vary
widely as to their crude source, for example, as to whether they are
paraffinic,
naphthenic, or mixed paraffinic-naphthenic. Oils derived from coal or shale
are also
useful. Natural oils vary also as to the method used for their production and
purification, for example, their distillation range and whether they are
straight run or
cracked, hydrorefined, or solvent extracted.
[071] Synthetic oils include hydrocarbon oil. Hydrocarbon oils include oils
such
as polymerized and interpolymerized olefins (e.g., polybutylenes,
polypropylenes,
propylene isobutylene copolymers, ethylene-olefin copolymers, and ethylene-
alphaolefin copolymers). Polyalphaolefin (PAO) oil base stocks are commonly
used
synthetic hydrocarbon oil. By way of example, PAOs derived from C8 to C14
olefins, e.g.,
C8, C10, C12, C14 olefins or mixtures thereof, may be utilized.
[072] Other useful fluids for use as base oils include non-conventional or
unconventional base stocks that have been processed, preferably catalytically,
or
synthesized to provide high performance characteristics.
[073] Non-conventional or unconventional base stocks/base oils include one
or more of a mixture of base stock(s) derived from one or more Gas-to-Liquids
(GTL)
materials, as well as isomerate/isodewaxate base stock(s) derived from natural
wax or
waxy feeds, mineral and or non-mineral oil waxy feed stocks such as slack
waxes,
natural waxes, and waxy stocks such as gas oils, waxy fuels hydrocracker
bottoms, waxy
raffinate, hydrocrackate, thermal crackates, or other mineral, mineral oil, or
even non-
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petroleum oil derived waxy materials such as waxy materials received from coal
liquefaction or shale oil, and mixtures of such base stocks.
[074] Base oils for use in the lubricating oil compositions of present
disclosure
are any of the variety of oils corresponding to API Group I, Group II, Group
III, Group
IV, and Group V oils, and mixtures thereof, preferably API Group II, Group
III, Group IV,
and Group V oils, and mixtures thereof, more preferably the Group III to Group
V base
oils due to their exceptional volatility, stability, viscometric and
cleanliness features.
[075] Typically, the base oil will have a kinematic viscosity at 100 C (ASTM
D445) in a range of 2.5 to 20 mm2/s (e.g., 3 to 12 mm2/s, 4 to 10 mm2/s, or
4.5 to 8
mm2/s).
[076] The present lubricating oil compositions may also contain conventional
lubricant additives for imparting auxiliary functions to give a finished
lubricating oil
composition in which these additives are dispersed or dissolved. For example,
the
lubricating oil compositions can be blended with antioxidants, ashless
dispersants,
anti-wear agents, detergents such as metal detergents, rust inhibitors,
dehazing
agents, demulsifying agents, friction modifiers, metal deactivating agents,
pour point
depressants, viscosity modifiers, antifoaming agents, co-solvents, package
compatibilizers, corrosion-inhibitors, dyes, extreme pressure agents and the
like and
mixtures thereof. A variety of the additives are known and commercially
available.
These additives, or their analogous compounds, can be employed for the
preparation
of the lubricating oil compositions of the invention by the usual blending
procedures.
[077] Each of the foregoing additives, when used, is used at a functionally
effective amount to impart the desired properties to the lubricant. Thus, for
example,
if an additive is an ashless dispersant, a functionally effective amount of
this ashless
dispersant would be an amount sufficient to impart the desired dispersancy
characteristics to the lubricant. Generally, the concentration of each of
these additives,
when used, may range, unless otherwise specified, from about 0.001 to about 20
wt %,
such as about 0.01 to about 10 wt %.
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EXAMPLES
[078] The following illustrative examples are intended to be non-limiting.
EXAMPLES 1-45
[079] The test compounds were blended in gasoline or lube oil and their
capacity for reducing LSPI events were determined using the test method
described
below.
[080] A GM 2.0 L LHU 4-cylinder gasoline turbocharged direct-injected engine
was used for LSPI testing. Each cylinder was equipped with a combustion
pressure
sensor.
[081] A six-segment test procedure was used to determine the number of LSPI
events that occurred under conditions of an engine speed of 2000 rpm and a
load of
275 Nm. The LSPI test condition is run for 28 minutes with each segment
separated by
an idle period. The first segment is used to condition the oil and the number
of LSPI
events are not counted. Each segment is slightly truncated to eliminate the
transient
portion. Each truncated segment typically has approximately 100,000 combustion
cycles (25,000 combustion cycles per cylinder). In total, the five truncated
segments
where LSPI events are counted have approximately 500,000 combustion cycles
(125,000 combustion cycles per cylinder). There may be instances of shortened
tests
in the event the engine cannot complete all six segments.
[082] LSPI-impacted combustion cycles were determined by monitoring peak
cylinder pressure (PP) and crank angle at 5% total heat release (A15). LSPI-
impacted
combustion cycles are defined as having both (1) a PP greater than five
standard
deviations than the average PP for a given cylinder and truncated segment and
(2) an
A15 greater than five standard deviations less than the average for a given
cylinder and
truncated segment.
[083] The LSPI frequency is reported as the number of LSPI-impacted
combustion cycles per million combustion cycles and is calculated as follows:
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LSPI Frequency = [(Total Number of LSPI Impacted Combustion Cycles in five
Truncated
Segments)/(Total Number of Combustion Cycles in five Truncated Segments)] x
1,000,000
[084] An additive associated with a test fuel and/or test lubricant that
reduces
the LSPI frequency, when compared to the corresponding baseline fuel and/or
baseline
lubricant, is considered an additive that mitigates LSPI frequency. For
testing herein,
the baseline fuel was a conventional 49-state premium unleaded gasoline fuel
without
any deposit control additives and the baseline lubricant was representative of
a
conventional engine oil meeting ILSAC GF-5 and API SN specifications. In some
of the
tests, tetralin was added to the gasoline to promote LSPI. The test results
are set forth
in Table 2.
42
TABLE 2
0
t..)
o
LSPI Activity
o
Reference
Drop in
cio
Ex. Additive Base (events/million
=
o
Additive Component
(events/million LSPI Formula
u,
No. Concentration Fluid combustion
combustion cycles)
Activity
cycles)
1 Prolinol 1000 ppmw Fuel 108 268
60% 10
2 Prolinol 1000 ppmw Fuel 155 268
42% 10
3 DBU/2-ethylhexanoate 1000 ppmw Fuel 14 250
94% 24A P
4 DBU/2-ethylhexanoate 500 ppmw Fuel 28 225
87% 24A
-
DBU/2-ethylhexanoate 250 ppmw Fuel 65 255
75% 24A (...) .
rõ
0
rõ
0
Tributylammonium/2-
,
6 1114 ppmw Fuel 166 265 37% 24B
ethylhexanoate
7 TMG/2-ethylhexanoate 875 ppmw Fuel 52 217
76% 24C
8 DBU/isostearate 1473 ppmw Fuel 48 240
80% 24D
Lube
9 DBU/isostearate 1.9 wt % 113 285
60% 24D 1-d
Oil
n
1-i
Prolino1/2-ethylhexanoate 828 ppmw Fuel 193
316 39% 24E 5
,..,
=
,z
-a
u,
,..,
,...,
c,
c,
Lube
0
11 Prolino1/2-ethylhexanoate 1.1 wt % Oil 131
316 59% 24E t..)
o
,-.
o
,-.
cio
Monosubstituted amine/2-
=
o
12 1114 ppmw Fuel 213 300
29% 24F
u,
ethylhexanoate
13 Aliquat/2-ethylhexanoate High Fuel 243
350 31% 24G
14 DBU/Proline 901 ppmw Fuel 50 350
86% 24H
15 DBU/diketone 946 ppmw Fuel 62 374
83% 24J
16 DBU/oleate 1466 ppmw Fuel 38 520
93% 24K P
17 DBU/Toluene 1020 ppmw Fuel 74 531
86% 24L 18 DBU/Tetralin Carboxylate 1108 ppmw
Fuel 106 540 80% 24M 4. .
rõ
0
rõ
0
,
19 DBU/Phenoxide 1020 ppmw Fuel 36 600
94% 24N -
,
rõ
20 DBU 514 ppmw Fuel 78 419
81% 5E
21 TMG 389 ppmw Fuel 154 463
67% 6A
22 DBU/Phenol 2338 ppmw Fuel 218 462
53% 24W
DBU/SA analog
1-d
23 1814 ppmw Fuel 152 396
62% 240 n
1-i
,..,
=
24 DBU Antioxidant 2421 ppmw Fuel 24 416
94% 24P
o
O-
u,
t..)
(...)
o
o
0
t..)
o
,-,
o
DBU/Hydroxy acid
,-,
25 1757 ppmw Fuel 159 367
57% 24Q cee
o
o
cio
u,
DBU/Ketoester
26 1577 ppmw Fuel 10 510
98% 24R
27 DBU/Hydroxamide 1750 ppmw Fuel 123 536
77% 24S
P
MorphGuam
28 1650 ppmw Fuel 119 478
75% 6F 2
.
u 1
.
N)
.
N)
.
TMG/antioxidant
,,,I
29 2213 ppmw Fuel 24 498
95% 24X -
,
,,
30 Benzamidine 676 ppmw Fuel 59 444
87% 5F
MorphGuam/2-
31 2461 ppmw Fuel 26 352
93% 241
ethylhexanoate
1-d
n
1-i
t..)
32 Benzamidazole 664 ppmw Fuel 151 353
57% 5G
,-,
o
O-
33 lmidazole 383 ppmw Fuel 112 330
66% 7A u,
t..)
(...)
o
o
34 2-aminobenzimidazole 749 ppmw Fuel 16 281
94% 6E 0
t..)
o
,-.
o
TMG/Ketoester
,-.
35 1382 ppmw Fuel 99 381
74% 24U cee
o
o
cio
u,
36 DBU/Ethyl Salicylate 1790 ppmw Fuel 34 472
93% 24V
N-(2,3-
dihydroxypropyl)heptan-2-
37 1000 ppmw Fuel 84 312 73% 24Y
aminium (AHPD)/2-
P
ethylhexanoate
0
0
38 benzoxazole 401.5 ppmw Fuel 197 344
43% 10A .
o .
rõ
39 2-aminobenzoxazole 805.4 ppmw Fuel 239 338
29% 10B
0
,
0
N,N-dimethyl-N-
40 octylbenzamidinium-2- 1665.7 ppmw Fuel 10 246
96% 9A
oxide
41 5,6-dimethylbenzotriazole 991.9 ppmw Fuel 109
235 54% 8B
42 DBU/phenoxide 1869.9 ppmw Fuel 0 215
100% 24Z 1-d
n
43 DBU/salicylate 4162.2 ppmw Fuel 46 197
77% 24AA
t..)
2-phenyl-1H-
,-.
44 1166.1 ppmw Fuel 121 192
37% 5M o
O-
benzo[d]imidazole
u,
t..)
(...)
o
o
CA 03094919 2020-09-23
WO 2019/180685
PCT/IB2019/052366
47
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