Technical Field
5 [0001 j The present invention relates to a rust preventive oil
composition.
Background Art
[0002] In many cases, metal members comprising iron as a main
component are manufactured through working such as cutting and
10 pressing. During manufacturing or when shipping as products, a rust
preventive oil is applied for the purpose of preventing discoloration
called rust or stain. The main purpose of the use oIThc rust preventive
oil is to form a film on the metal surface to block oxygen, and thereby
preventing oxidation of metal, that is, rust.
15 [0003] However, if a chloride or water is attached to the metal surface,
it becomes difficult for (he rust preventive oil to sufficiently exert its
effect For example, in the case where a metal working oil containing
a chlorine extreme-pressure agent is used for a preceding process of
working, in order to obtain a sufficient rust preventive property, the
20 chloride thai is a rust generation factor needs to bo removed in advance.
Thus, in many cases, after washing and removing the chloride with a
linger print remover type rust preventive oil called NP-0 specified by
J1S K 2246, a rust preventive oil is used,
[0004] Furthermore, when a water-soluble working oil is used, moisture
25 is considered to be attached. Also in this case, moisture needs to be
removed before using a rust preventive oil as is the case in chlorine.
1
FP13-0753-00
An oil solution whose water displacement property is enhanced is
sometimes used to remove water. The water displacement property
herein means performance by wliich an additive agent in the oil solution
penetrates between, water and metal, and water is removed from the
5 metal surface. Oil solutions corresponding to NP-3-1 and NP-3-2
classified by JIS K 2246 also have a water displacement property, but
this relates to a rust preventive property when moisture is mixed in a
rust preventive oil and does not specify performance capable of
removing water from a metal surface (see Non Patent Literature 1).
10 Hereinafter, in oi*der to avoid coniusion, perfoniiance (o remove water
from a metal surface is called a "water removal property", and is
distinguished fmm the water displacement property specified by JIS.
[0005] As described above, in order to carry out rust preventive
treatment for metal to which moisture is attached, firstly, moisture is
15 removed by washing with an oil solution which excels in water removal
property, and then, a rust preventive oil needs to be applied. However,
in many cases, (he two processes, "removal of moisture" and
"application of rust preventive oil", cannot be carried out due to causes
such as productivity and cost, and an oi/ solution capable of unifying
20 treatment JH required- However, it is very much a situation that
treatment of an oil solution having a water removal property lacks a rust
preventive property snd a sufficient rust preventive properly cannot be
obtained by applying a rust preventive oil without a water removal
process (for example, see Patent Literatures 1 and 2).
25 Citation List
Patent Literature
2
H FP13-0753-00
[0006J Patent Literature 1: Japanese Patent Application Laid-Open No.
2001-89795
Patent Literature 2: Japanese Patent Application Laid-Open No.
2001-89798
5 Non Patent Literature
[0007] Non Patent Literature 1: Junichi Shibata, ENLOS Technical
Review, vol. 50, No, 3, page 45
Summary of Invention
Technical Problem
10 [0008] One of the reasons for an oil solution having a water removal
property not achieving a .sufficient rust preventive property is
insufficient stability of the oil solution for water. One of the additive
agents used tor obtaining an excellent rust preventive properly is an
, ester, which is hydroly/ed due to eontinuous contact with water so as to
15 lose the original performance,
[0009] Further, a finger print remover-type rust preventive oil ineludes
water blended in oiS for dissolving a finger print (i.e. chloride), and
consequently, use of an ester to be easily hydrolyxed is not preferred as
in the case of an oil solution having a water removal property, so mat
20 imparting a sufficient rust pievt^ntive property to the linger print
remover-type rust preventive oil is generally difficult.
[0010] Furthermore, due to frequent use of hydroscopic material such
as sulfonates in conventional washing rust preventive oils and nisi
preventive oils, the ester is hydrolyzed by the naturally absorbed
25 moisture, causing the problem of gradually reducing the performance of
the oil solution. In other words, the main problem of rust preventive
3
FP13-0753-00
oils is to maintain the stability of rust preventive oils to water, which is
one of the most common causes of rust generation.
[0011] The present invention has been made in view of these
circumstances, and it Is an object of the present invention to provide a
5 rust preventive oil composition excellent in rust preventive properly
applicable to metal parts such as steel sheets, bearings, slccl balls, and
guide rails, having both of a water removal property and finger print
removal property.
Solution to Problem
10 [0012] The present inventors made extensive research for the solution
of the above-described problem, and found that the stable rust
preventive property csn be achieved even afler a long contact with
moisture by combining a specific base oil and a naphthenie acid salt and
satisfying specific conditions on the content of the base oil so as to
15 complete the present invention.
[0013] Namely, the rust preventive oil composition of the present
invention comprises: (A) a base oil comprising a mineral oil; and (B) a
naphthenie acid salt; the content of the base oil being 50 mass% or more
based on a total amount of the rust preventive oil composition,
20 [0014] The mineral oil is preferably a mixture of: (al) a mineral oil
having a kinematic viscosity at 40°C of 7 mm /s or less; and (a2) a
mineral oil having a kinematic viscosity at 40°C of250 mmVs or more.
[0015] The rust preventive oil composition of the present invention
preferably further comprises: (C) a tally acid amine salt.
25 [0016] The rust preventive oil composition of the present invention
preferably further comprises: (D) a sulfoic acid salt.
4
FP13-0753-00
[0017] The nisi preventive oil composition of die present invention
preferably comprises no ester.
[0018] The kinematic viscosity at 40°C of the rust preventive oil
composition ofthe present invention is pieferably 0.5 to 10 mmVs.
5 Advantageous Effects of Invention
[0019] According to the present invention, a rust preventive oil
composition capable of suppressing the generation of rust for a long
period may he provided, having both of a water removal property and a
finger print removal property. For example, the rust preventive oil of
10 the present invention has an excellent effect that the time during which
Grade A of rust generation (rust generation of 0%) is maintained in a
neutral salt water spray test specified by JTS K 2246 "Rust preventive
oils" is 16 hours or more.
Description of Embodiments
15 [0020] Hereinafter, a preferred embodiment of the present invention
will be described in detail.
[0021] A rust preventive oil composition according to the embodiment
of the present invention contains: (A) a base oil comprising a mineral
oil; and (B) a naphthenic acid salt.
20 [0022J The kinematic viscosity at 40°C of the mineral oil is preferably
0.5 mmVs or more, more preferably /.0 itiniVs or more, and most
preferably 1.5 inm /s or more, though not particularly limited. Further,
the kinematic viscosity at 40°C of the mineral oil is preferably 700
mm2/s or less, more preferably 650 mm2/s or less, and most preferably
25 600 mm /s or less. With an excessively low kinematic viscosity, it
becomes difficult to fomi a sufficient oil film to decrease the rust
5
FP13-0753-00
preventive properly; while with an excessively high kinematic viscosity,
the properly for removing the rust generation factor from a melal
surface decreases to decrease Ihc rust preventive property.
[0023] From the viewpoint of enhancing ihc rust preventive properly,
5 mixmg two or more base oils having a different kinematic viscosity is
preferred. In this case, it is preferred to mix a mineral oil having a
kinematic viscosity at 40°Cof7mm?/s or less (hcreinaRcr referred to as
"low-viscosity base oil") and a mineral oil having a kinematic viscosity
at 40°C of 250 rnm2/s or more (hereinafter referred to as "high-viscosity
10 base oil").
[0024] The kinematic viscosity at 40°C of the base oil after mixing is
preferably less than 10 inm^/s, though not particularly limited. With an
excessively high kinematic viscosity, Ihc effect of enhancing the rust
preventive properly is hardly obtainable^
15 [00251 Mineral oils as (A) component include those having die
above-described kinematic viscosity al 40°C among paraffinic or
naphthenic mineral oils, which are obtainable by arbitrarily combining
and applying one or two or more refining means such as solvent
deasphaiting, solvent extraction, hydro cracking, solvent dewaxing,
20 catalytic dewaxing, hydroiefiiiing, sulfuric acid washing, and clay
treatment, with reject to lubricant oil distillate obtained by atmospheric
distillation and/or vacuum distillation of crude oil.
[0026] Although the aromatic content in the base oil is not particularly
limited, the aromalie content in the low-viscosity base oil is preferably 3
25 mass% or less. When the aromatic content in the low-viscosity base
oil is 3 mass% or less, the work environment may be improved, for
6
FP13-0753-00
example, a reduction in odor and skin irritation, and iurthermore, water
separating performance when a largo amount of water is mixed in the
rust preventive oil composition may be improved, resulting in an effect
of extending life of an oii solution even in the case of removing a large
5 amount of water. The aromatic component means a value measured in
conformity with Fluorescent indicator adsorption method of JTS K
2536-1996 "Liquid petroleum products-Testing method of components".
[0027] The content of base oil is 50 mass% or more, preferably 60
mass% or more, more preferably 65 mass% or more, most preferably 70
10 mass% or more, based on the total amount of the rust preventive oil
composition. With an excessively low content of the base oil, the
water displacement properly tends to decrease, which is not preferred.
The upper limit of the content of die base oil is preferably 99.9 mass%
or less, more preferably 99 mass% or less, most preferably 98 mass% or
15 less, based on the total amount of the rust preventive oil composition,
though not parlicularly limited. With an excessively high content of
the base oil, the nisi preventive property decreases, which is not
preferred.
[0028] In the present embodiment, the base oil may include one or
20 more selected from a carbon hydrate oil such as poly rt-olefin, alkyl
benzene, alkyl naphthalene; an ether base oil such as poly-alkylene
glycol; and an animal or vegetable oil; other than the mineral oil, as
long as the performance of the rust preventive oil composition is not
impaired. In the case of a mixed base oil of a mineral oil and another
25 base oil, the content of mineral oil is preferably 40 mass% or more,
more preferably 50 massH or more, furthermore preferably 60 mass%
7
FP13-0753-00
or more, based on the total amount of the base oil.
[0029] The naphlhenic acid to constitute a naphthenic acid salt as the
component (B) may be synthesized or produced from petroleum,
including carboxylic acid compounds of cyclopcntane, cyclohexane,
5 and it mixture thereof as main components.
[0030] Tn the case that the naphthenic acid salt is an amine salt,
examples of the amine include monoamine, poly amine, and
alkanolamine.
[0031] Tn the ease that the naphthenic acid salt is a metal salt, examples
10 of the metal include xinc, iron, nickel, copper, calcium, manganese,
cobalt, and lead; and the naphthenic acid metal salt is preferably a zinc
salt, a calcium salt, a copper salt* and a manganese salt, most preferably
zinc naphthenate.
[0032] The content ofnaphthenic acid salt is preferably 0.5 mass% pr
15 more, more preferably 1 mass% or more, furthermore preferably 2
mass% or more, and preferably 20 mass% or less, move preferably 15
mass% or less, furthertmn-o preferably 10 mass% or less, based on the
total amount of the rust preventive oil composition, lliough not
particularly limited. With a content of the naphthenic aeid salt lass
20 than the lower limit, the water removal property lends to decrease, and
with a content of the naphthenic acid salt more than the upper limit, the
rust preventive property tends io decrease.
(0033J The rust preventive oil composition according to the present
embodiment preferably further includes a fatty acid amine salt (C).
25 The fatty acid to constitute the fatty acid amine salt may be a saturated
fatty acid or an unsaturated fatty acid, and may be a straight-chain fatty
8
FP13-0753-00
acid or a branched fatty acid. The number of carbon atoms of (he fatty
acid is preferably 4 to 18, more preferably 6 to 12, though not
particularly limited.
[0034] Examples of the amines include monoamines, polyamhies, and
5 alkanolamines.
[0035J Examples of the monoamines include alkylamines such as
monomelhyiarnine, di mcthy lam me, trimethyl amine, monoelhylamine,
dlethylamine, Iricthylamine, nionopropylamine, dipropyl amino,
Iripropykmine, mononulyiamine, dibutylamine, tiibutylamine,
10 nionopenty famine, dipentylamine, Iripentylaminc, monohe&ylamine,
dihexyl amino, monohcptylamine, diheptyl amine, monooetylamine,
dioctylamine, monononylamine, monodecy] amine, monoundecylamine,
munododecyl amine, monotridecyl amine, monotetradecyl amine,
monopenladecylamine, monohexadceylamine, monoheptadeeylamine,
15 monooetadecylaminc, monononadecylamine, monoicosyl amino,
monoheni cosy 1 amine, monodocosyl amine, monoiri cosy 1 amine,
dimethyl(e£hy IJamine, di mcthylfpropyl)amine, dimethyl (bulyIJamine,
d i methyl (penty IJamine, dimethyl (hcxyl)am i ne5 dimethyl (hepty ljam i n e,
di m elhy i(octy 1 Jam i no, d i melli y l(nony 1 Jam i no, d I m elby l(d ecy 1 Jam ine,
20 di methy l{u i I decy I) am i n e, dim et hy 3 (do decy I Jamine,
dimet hy 1 (Iridecy IJa mine, d i mothy l(tetradocyl Ja m t no,
di mothy l(pentadecy ljamin e, dimethyl (hcxadecy 1 Jamine,
di mcthy l(heptadoey IJamine, d iniethy I(o ctadecy IJamine,
dimethy 1 (nonad ecyl Jam inc, dimethyl (icosyl)a mine,
25 di mcthy l(heni cosy J Jamine, and dimethyl(tricosylJaminc;
alkenylamines such as monovinylaminc, di vinyl amine, lnvinylamine]
9
FP13-0753-00
10
15
20
25
monopropenylamine,
m on obuteny 1 ami ne,
monopentcnylaminc,
m on ohexenyla mine,
dihepteny lamine,
dipropcnylaminc,
dibutenylamine,
dipenteny lamine,
dihexenylamine,
tripropenylamine,
tributenylamine,
Iripentenyl amine,
moiioheptcnylamine,
monoo ctenyl a mi ne, dioctenylamine,
nionononcny lamine, monodccenylamine, monoundecenyl amine,
nionododecenylamine, monotridecenylamine, monototradccenylaminc,
m onopenladeceny 1 am i ne, monohexadeceny lamine,
monoheptadeccny lamine, monooctadeceny 1 ami ne,
monononadecenylamine, monoicoscnylaminu, nioiiohcnicoscnylaminc,
m on odocosenyl amine, and monouicoseny lamine;
monoamines having an alkyl group and an alkenyl group, such as
dimethyi(vhiyl)aniinc,
d i methyl (buteny l)amine,
dimethy 1 (h exeny 1J amine,
dimediyl(octenylJamine,
d imethyi(d eceny 1) amine,
dim ethyl (dodecenyl)a m i ne,
cli molhy I (leuadeceny I }a m i n e,
d i mel hy 1 (hcxadccci ly l)ai 11 ino,
d i methyl (oct adeceny l)a mi ne,
di methyl (i co seny 1 )amine,
di m ethyl (propeny 1 Jam i n e,
dimethylfpcntcnyljamine,
d i methy l(heptenyl)amine,
dim ethyl (n oneny l)am i ne,
dimct hy 1 (undeoeny 1 Jam ino,
dimethy l(tiid eceny l)amine,
d i m ethyl (pen tadeceny I Jam i ne,
di 111 o ll iy 1 (11 q riadixur ly I} a i n i no,
d imetliy l(nonad eceny l)am i ne,
di mel hy 1 (hen i coseny 1) am i ne, and
diinethyl(tricosenyl}amine;
aromatic-substituted alkylamines such as monobenzy lamine,
(l-phcncthyl)amine, (2-phenethyl)amine (another name:
monophenethy lamine), dibenzylamine, bis(l-phcncthyl)amme, and
10
FP13-0753-00
bis(2-phcnelhyl)amine (another name: diphenethyl amine);
cycloalkylamines havhig the number of carbon atoms of 5 to 16, such as
mono cycl openly 1 amine, dicyclopentylamine, tricyclopentylamine,
monocyclohcxylamhie, dicyelohexy Iambic, monocycloheplylaminc,
5 and dicycloheptylamine; monoamines having an alkyl group and a
cycloalkyl group, such as dimethyl(cyclopentyl)amine,
dimcthylfcyclohexyljamme, and dimelhyI(cycIoheplylJamine; and
alkylcycloatkylamines such as (methyl cyclopentyljamine, bis{metliyl
cyclopentyljamine, (dimethyl cyclopentyljamine, bis(dimethyl
10 cyclopentyljamine, (ethyl cyclopentyljamine, bisfelhyl
cyclopentyljamine, (mctliyl ethyl cyclopentyljamine, bis(methyl ethyl
cyclopentyljamine, (diethyl cyclopentyljamine, (methyl
cyclohexyljamine., bis(methy1 cyclohexyljamine, (dimethyl
cyclohexyljuminc, bis(di methyl cyclohexyljamine, (elbyl
15 cyclohexyl) amine, bis(ethyl cyclohcxyljamine, (methyl ethyl
cycl oh exyl) amine, (diethyl cyclohcxyljamine, (methyl
cycloheplyljamine, bis(me!hyl cycl oheptyl Jam ine, (dimethyl
cyclohcptyljaminc, (ethyl cycioheplyljaminc, (methyl ctliyl
cycloheptyljamine, and (diethyl cycloheptyijamine, and also include all
20 substituted isomers of these monoamines. The monoamines described
herein include monoamines such as beef tallow amine, which arc
derived from oils and fats.
[0036] Examples of the polyamines include alkylenepolyamines such as
ethylene diamine, di ethylene tviumine, Methylene tetiaminc,
25 tetraethylene pentamine, pentaethylene hexamine, propylene diamine,
dipropylcne vriamine, tripropylene leiramine, letrapropylene pentamine,
11
FP13-0753-00
pcntapropylene hexamine, bntylene diamine, dibutylene triamine,
tributylene tetraminc, tctrabutylcnc penlamine, and pentabulylene
hexamine;
N-alkylethylenedianiines such as N-methyl ethylene diamine, N-ethyl
5 ethylene diamine, N-propyl ethylene diamine, N-butyl ethylene
diamine, N-pentyl ethylene diamine, N-liexyl etliylcnc diamine,
N-lieptyl cfliylene diamine, N-octyl ethylene diamine, N-nonyl ethylene
diamine, N-decyl ethylene diamine, N-undecyl, N-dodecyl ethylene
diamine, N-tndecyl ethylene diamine, N-tetradccyl ctliylenc diamine,
10 N-pentadccyl ethylene diamine, N-hexadecyl ethylene diamine,
N-heptadceyl ethylene diamine, N-octadecyl ethylene diamine,
N-nonadecyl ethylene diamine, N-ice-syl ethylene diamine, N-henicosyl
ethylene diamine, N-docosyi ethylene diamine, and N-tricosyl ctliylenc
diamine;
15 N-alkenylethylenediamines such as N-vinyl ethylene diamine,
N-propenyl ethylene diamine, N-butenyl ethylene diamine, N-pcntenyl
ethylene diamine, N-hexenyl ethylene diamine, N-heptenyl ethylene
diamine, N-octcnyl ethylene diamine, N-nonenyl ethylene diamine,
N-decenyl ethylene diamine, N-mideceny] ethylene diamine,
20 N-dodecenyl ethylene diamine, N tridecenyi ethylene diamine,
N-tctradceenyl ethylene diamine, N-pentadecenyl ethylene diamine,
N-hexadecenyl ethylene diamine, N-hepladeecnyl ethylene diamine,
N-octadecenyl ethylene diamine, N-nonadecenyi ethylene diamine,
N-icusenyl ethylene diamine, N-henicosenyl ethylene diamine,
25 N-docosenyl ethylene diamine, and N-lricosenyl ethylene diamine; and
N-alky[ or N-alteenylalkylenepolyamines such as N-alkyl diethylene
12
FPI3-0753-00
triamine, N-alkcnyl diethyleiie trianiine, N-alkyl triethylene tetiamine,
N-alkenyl triethylene tetramine, N-alkyl tetraethylene pen famine,
N-alkenyl lelraelhylcne pentamine, N-alkyl pcntaethylenc hexaniine,
N-alkenyl pentaethylene hexamine, N-alkyl propylene diamine,
5 N-alkenyl propylene diamine, N-alkyl dipropylene triamine, N-alkenyl
dipropylene triamine, N-alkyl tripropylciie tcframine, N-alkenyl
tiipropylcne tetramine, N-alkyl tetrapropylene pentamine, N-alkenyl
tetrapropylene pentamine, N-alkyl pentapropylene hexamine, N-alkenyl
pentaprapylene hexamine, N-alkyl bulylene diamine, N-alkenyl
10 butylcne diamine, N-alkyl dibutylene triamine, N-alkenyl dibutylene
triamine, N-alkyl tributylene tetramine, N-alkenyl tributylene tetramine,
N-alkyl tetrabutylene pentamine, N-alkenyl tetrabutylene pentamine,
N-alkyl pentabulylene hexamine, and N-alkenyl pentabutylene
hexamine, and also include all substituted isomers of these polyamines.
15 Moreover, the polyamines described herein include polyamines (beef
tallow polyamine and the like) which are derived from oils and fats.
[0037] Examples or the aikanoiamines include monometlianolamine,
dimedianoiaminc, trimetlianolamine, monoethanolamine,
d i ethanol a m i ne, t rieth a nol amine, m ono(n-pvopaiK>l)ammc,
20 di(n-pvopHnol)iimine, lri(n-pri.>panui)ammc> monoisopropanolamme,
di isopropanolam ine, triisopropanola m i ne, monobutan ol a m i n e,
dibulanolamine, tribulanolamine, monopcntanolamine,
dipentanolamine, Iripentanol amine, monohexanolamine,
dihcxanolamine, monoheptanolamine, diheptanol amine,
25 monooctanolamine, monononanol amine, monLodceanolamine,
mono undeeanol amine, monododecanolaniine, uionotiidecanolamme,
13
FP13~0753-flO
monotetradecanolamine, monopentadecanolamine,
monohexadecanol amine, diethyl monoethanol amine, diethyl
monopropanol amine, diethyl monobutanol amine, diethyl
monopentanol amine, dipropyl monoethanol amine, dipropyl
5 monopropanol amine, dipropyl monobulanol amine, dipropyl
monopentanol amino, dibutyl monoethanol amine, dibutyl
monopropanol amine, dibutyl monobutanol amine, dibutyl
monopentanol amine, monoelhyl diethanol amine, monoeihyl
dipiopanol ammo, monoethyl dibutanol amine, monoetliyl dipentaiiol
10 amine, monopropyl diethanol amine, monopropyl dipropanol amine,
monopropyl dibutanol amine, monopropyl dipentanol amine, monobulyl
diethanol amine, monobutyl dipropanol amine, monobulyl dibutanol
amine, monobutyl dipentanol amine, monocyclohexyl monoethanol
a m,ine, monocyclohexyl diethanol amine, monocyclohexyl
15 monopropanol amine, and monocyclohexyl dipropanol amine, and also
include all substituted isomers of those aikanolamiiies,
(0038] Among the above-described amines, monoamines are preferable
from the viewpoint of mst preventive properties, and among
monoamines, in particular, alkylamines, monoamines having an alkyl
20 group and an alkenyl group, monoamines having an alkyl group and a
cycloalkyl group, cycloalky (amines, and alkylcydoalkylamines are
more preferable,
[0039] h'rom the viewpoint of rust preventive properties, the total
number of carbon atoms in a tatty acid amine molecule is preferably 12
25 or more, and from the viewpoint of prevention of stains, the total
number of carbon atoms is preferably 24 or less.
14
FP13-0753-00
[0040] The content of the fatly acid amine salt is not particularly
limited, but is preferably 0.5 mass% or more, more preferably 1 mass%
or more, and further preferably 2 mass% or more, and preferably 10
mass% or less, more preferably 8 mass% or less, and further preferably
5 6 mass% or less, based on the total amount of the rust preventive oil
composition. When the content of the fatty aeid amine salt is less than
the above-described lower limit, a water removal properly tends to
decrease, and when it exceeds the above-described upper limit, a rust
preventive property tends to decrease.
10 [0041] The rust preventive oil composition according to the present
embodiment preferably further includes a sulfonic acid salt (D),
Prefeired examples of the sulfonic acid salt include sulfonic acid alkali
metal salts, sulfonic acid alkali earth mctaE salts, and sulfonic acid
amine salts. Eveiiy sulfonic aeid salt has sufficiently-high safety for
15 human bodies and ecosystems, and can be obtainable by reacting an
alkali metal, an alkali earth metal, or an amine with sulfonic acid.
j 0042] Examples of the alkali melal which constitutes the sulfonic acid
salt include sodium and potassium. Moreover, examples of the alkali
earlb melal include magnesium, calcium, and barium. Among them,
20 as the alkali metal and the alkali earth metal, sodium, potassium,
calcium, and barium are preferable, and calcium is particularly
preferable,
[0043] In the ease where the sulfonic acid salt is amine salts, examples
of the amines include monoamines, poiyamines, and alkanolamincs.
25 [0044] Examples of the monoamines, poiyamines, and alkanolamines
for use may include the same monoamines, poly amines, and
15
FP13-0753-00
alkanolamines as in the description of the fatty acid amine salt,
respectively.
[0045] As the above-described sulfonic acid, those which are
manufactured by a conventional method and well-known can be used,
5 Specifically, general examples thereof include a petroleum sulfonic
acids such as one obtainable by sulfonating an alkyl aromatic compound
of lubricant oil distiMaie of a mineral oil; a so-called mahogany acid
by-produced when manufacturing white oil; or synthetic sulfonic acids
such as one obtainable by sulfonating an alkylbenzene having a
10 straighl-chain or branched-chain alkyl group, which is obtainable by
alkylating ben/ene with a polyolefin by-produced from a manufacturing
plant of an alkylbenzene which is to be a raw material for a detergent
and the like, and one obtainable by sulfonating an alkyl naphthalene
such as dinonylnaphthalene. ,
15 [0046] Examples of the sulfonic acid salts obtainable by using die
above-described raw materials include the following: alkali metal bases
such as alkali metal oxides or hydroxides; neutral (normal salt)
sulfonates obtainable by reacting alkali earth metal bases such as alkali
earfh metal oxides or hydroxides, or amines such as ammonia,
20 alkylaimnes, and alkanolamines with sulfonic acid; basic .sulfonates
obtainable by heating the above-described neutral (normal salt)
sulfonates and excess alkali metal bases, alkali earth metal bases, or
amines in the presence of water; carbonate overbasic (ultrabasie)
sulfonates obtainable by reacting the above-described neutral (normal
25 salt) sulfonates with alkali metal bases, alkali earth metal bases, or
amines in the presence of carbon dioxide gas; borate overbasic
16
FP13-0753-00
(ultrabasic) sulfonates obtainable by reacting the above-described
nculial (normal salt) sulfonates with alkali metal bases, alkali earth
metal bases, or amines and boric acid compounds such as bone acid and
anhydrous boric acid, or by reacting the above-described carbonate
5 overbasic (ultrabasic) sulfonates with boric acid compounds such as
boric acid and anhydrous boric acid, and mixtures thereof
[0047] As the sulfonic acid salts, at least one selected from the group
consisting of dialkyliiaphthalene sulfonic acid salts in which the number
of carbon atoms in total of two alkyl groups bonded to a naphthalene
10 ring is 14 to 30; di alkyl benzene sulfonic acid salts in which each of two
alkyl groups bonded to a benzene ring is a straight-chain alkyl group or
a branched-chain alkyl group having one side-chain methyl group, and
the number of carbon atoms in total of the two alkyl groups is 14 to 30;
and monoalkylbenzene sulfonic acid salts in which the an alkyl group
15 bonded to a benzene ring has the number of carbon atoms in alkyl group
of 15 or more, is preferably used.
[0048] In the present embodiment, among the above, one or two or
more selected from neutral, basic, and overbasic alkali metal sulfonates
and alkali earth metal sulfonates are more preferably used; and neutral
20 or nearly neutral alkali metal sulfonates or alkali earth metal sulfonates
having a base value of 0 to 50 mgKOH/g, and preferably 10 to 30
mgKOll/g, and/or (over)basic alkali metal sulfonates or alkali earth
metal sulfonates having a base value of 50 to 500 mgKOH/g, and
preferably 200 to 400 mgKOH/g are particularly preferably used.
25 Moreover, the mass ratio of the above-described alkali metal sulfonates
or alkali earth metal sulfonates having a base value of 0 to 50 mgKOH/g
17
FP13-0753-00
to the alkali metal sulfonates or alkali earth metal sulfonates having a
base value of 50 to 500 mgKOH/g (alkali metal sulfonates or alkali
earth metal sulfonates having base value of 0 to 50 mgKOH/g/alkali
metal sulfonates or alkali earth metal sulfonates having base value of 50
5 to 500 mgKOH/g) is preferably 0.1 to 30, more preferably 1 to 20, and
particularly preferably 1.5 to 15, based on the total amount of the
composition.
[0049] The base value herein means a base value measured by
ilydroehlorie acid method in conformity with JIS K 2501 "Petroleum
10 products and lubricants-Determination of neutralization number",
Section 6, in the state where generally 30 to 70 mass% of a diluent such
as a lubricant base oil is contained.
[0050] Among the above-described sulfonic acid salts, amine
sulfonates, calcium sulfonate, and barium sulfonate are preferable, and
15 alkylenediamine sulfonates and calcium sulfonate are particularly
preferable.
[0051] The content of sulfonic acid salt is preferably 0.05 mass% or
more, more preferably 0.1 mass% or more, furthermore preferably 0.5
mass% or more, and preferably 10 mass% or less, more preferably 8
20 mass% or less, furthermore preferably 6 mass% or less, based on the
total amount of the rust preventive oil composition, though not
particularly limited. With a content of sulfonic acid salt less than the
lower limit, the rust preventive properly tends to deci-ease, and with a
content of sulfonic acid salt more than the upper limit, the water
25 displacement property tends to decrease.
[0052] The rust preventive oil composition according to the present
18
FP13-0753-00
embodiment preferably nirther includes one or more rust preventive
agcnls selected from the group consisting of a sarcosine-type compound
(El), a nonionic surfactant (E2), a carboxylic acid (E3), a carboxylic
acid salt (except for naphthenic acid) (B4), a paraffin wax (E5), an
5 oxidized wax salt, and a boron compound.
[0053] The (El) sarcosine-type compound has a structure represented
by the following formula (1), (2)s or (3):
R'-CO-NR2-(Cn?VCOOX (3)
wherein, R represents an alkyl group having 6 to 30 carbon
10 atoms or an alkenyl group having the number of carbon atoms of 6 to
30, R2 represents ari alkyl group having the number of carbon atoms of
1 to 4f X represents a hydrogen atom, an alkyl group having the number
of carbon atoms of 1 to 30, or an alkenyl group having the number of
carbon atoms of 1 to 30, and n represents an integer of 1 to 4;
15 rR'-CO-MR?-(CH2)ll-COO]i:iY (4)
wherein, R represents an alkyl group having the number of
carbon atoms of 6 to 30 or an alkenyl group having the number of
carbon atoms of 6 lo 30, Rz represents an alkyl group having the number
of carbon atoms of 1 to 4, Y represents an alkali metal or an alkali earth
20 metal, n represents an integer of 1 to 4, and m represents 1 when Y is an
alkali metal, and represents 2 when Y is an alkali earth metal;
rR1-CO-NR2-(Cll2)„-COO],n-Z-(OH}m (5)
wherein, R represents an alkyl group liaving the number of
carbon atoms of 6 to 30 or an alkenyl group having the number of
25 carbon atoms of 6 to 30, R2 represents an alkyl group having the number
of carbon atoms of 1 to 4, Z represents a residue other than hydroxy!
19
FP13-0753-00
groups of a dihydric or higher poiyhydric alcohol, m represents an
integer of 1 or more, m" represents an integer of 0 or more, m + mT
represents a valence of Z, and n represents an integer of 1 to 4.
[0054] In the formulas (1) to (3), R represents an alkyl group having
5 the number of carbon atoms of 6 to 30 or an alkenyl group having the
number of carbon atoms of 6 to 30. In terms of solubility in a base oil
and the like, it is necessary that R be an alkyl group or an alkenyl gronp
having the number of carbon atoms of 6 or more, and the number of
carbon atoms is preferably 7 or more, and more preferably 8 or more.
10 Moreover, in terms of storage stability and the like, it is necessary that
R be an alkyl group or an alkenyl gronp having the number of carbon
atoms of 30 or less, and the number of carbon atoms is preferably 24 or
less, and more preferably 20 or less,
[0055J In the formulas (1) to (3), R represents an alkyl group having
15 the number of carbon atoms of 1 to 4. In tenns of storage stability and
the like, it is necessary that R be an alkyl group having the number of
carbon atoms of 4 or less, and the number of carbon atoms is preferably
3 or less, and more preferably 2 or less.
[0056] Tn the formulas (I) Lo (3), n represents an integer of 1 to 4. In
20 terms of storage stability and the like, it is necessary that n be an integer
of 4 or less, n is preferably 3 or less, and n is more preferably 2 or less.
[0057] Tn the formula (1 )> X represents a hydrogen atom, an alkyl group
having the number of carbon atoms of 1 to 30, or an alkenyl group
having the number of carbon atoms of 1 to 30. Tn terms of storage
25 stability and the like, it is necessary that an alkyl group or an alkenyl
group represented by X have the number of carbon atoms of 30 or less,
20
FP13-0753-00
and the number of carbon atoms is preferably 20 or less, and more
preferably 10 or less.
[0058J In the formula (2), Y represents an alkali metal or an alkali earth
metal, and specifically, examples Shcrcof include sodium, potassium,
5 magnesium, calcium, and baiium. Among them, in terms of a better
rust preventive property, alkali earth metals are preferable. Tt is to be
noted that, in the case of barium, safety for human bodies and
ecosystems may become insufficient. In the formula (4), m represents
1 when Y is an alkali metal, and represents 2 when Y is an alkali earth
10 metal.
[0059] Tn the formula (3), m represents an integer of 1 or more, m'
represents an integer of 0 or more, and m+nf is the same as the valence
of Z. That is, all of hydroxy! groups in a polyhydric alcohol of Z may
be substituted or only a part thereofmay be substituted.
15 [0060] Among the sareosincs represented by the above formulas (3) to
(5), in terms of a better lust preventive property, at least one compound
selected tram the formulas (3) and (4) is preferable. Moreover, only
one compound selected from the formulas (3) to (5) may be used alone,
or a mixture of two or more compounds may be used.
20 [OO^IJ The content of the sarcosines represented by the Covmulas (1) to
(3) is not particularly limited, but is preferably 0.05 to 10 mass%, more
preferably 0.1 to 7 mass%, and further preferably 0.3 to 5 mass%, based
on the total amount of the composition. When the content of die
sarcosines is less than the above-deseribed lower limit, a rust preventive
25 property and long-term sustainability thereof tend to become
insufficient. Even when the content of the sarcosines exceeds the
21
FP13-0753-00
above-described upper limit, an improving effect of a lust preventive
property and long-term sustainabiiily thereof, which meels the content,
does not tend to be obtained.
[0062] Specific examples of the nonionic surfactant (E2) include
5 alkylene glycol, polyoxyalkylene glycol, polyoxyalkylene alky! ether,
polyoxyalkylene aryl ether, fatty acid ester of polyoxyalkylene adduct of
poly alcohol, polyoxyalkylene fatty acid ester, polyoxyalkylene
alkylamine, and alkyl alkanolamidc. Among these, as nonionic
surfactant for use in the present Invention, alkylene glycol,
10 polyoxyalkylene glycol, polyoxyalkylene alkyl ether, polyoxyalkylene
aryl ether, and polyoxyalkylene alkylamine are preferred, and
polyoxyalkylene glycol and polyoxyalkylene alkylamine are particularly
preferred because they may impart a better rust preventive property to
the rust preventive oil composition of the present invention.
15 [0063] The nonionic surfactant may be used alone, or two or more
kinds of the nonionic surfactants may be used in combination.
Altiiough the rust preventive oil composition of the present invention
may include no nonionic surfactant, in tile case of containing a nonionic
surfactant, the content is preferably 0-01 to 30 mass% based on the total
20 amount of the rust preventive oil composition, h'rom the viewpoint of
rust preventive property, the upper limit of the content is preferably 10
mass% or less, more preferably 8 mass% or less, furthermore preferably
6 mass% or less, most preferably 5 mass% or less,
[0064] Any carboxylic acids can be used as the (E3) carbuxylic acid,
25 but preferable examples thereof include fatly acids, tricarboxylic acids,
hydroxyratry acids, naphthenic acids, resin acids, oxidized waxes, and
22
FP13-0753-00
lanolin fatty acid. The number of carbon atoms of tbe above-described
fatty acids is not particularly limited, but is preferably 6 to 24, and more
preferably 10 to 22. Moreover, tbe fatty acids may be saturated fatty
acids or unsaturated fatty acids, and may be straight-chain fatty acids or
5 branched-chain ratty acids.
[0065] Examples of tbesc fatty acids include saturated fatty acids such
as hexane acid, heptane acid, octane acid, nonanc acid, decanc acid,
undecane acid, dodecane acid, tridecane acid, tetradecane acid,
pentadeeanc acid, hexadecane acid, beptadecane acid, octadecane acid,
10 nonadecane acid, icosanc acid, honicosanc acid, docosanc acid,
tricosane acid, and tetiacosane acid; unsaturated fatty acids such as
hexene acid, heptene acid, octene acid, nonene acid, decene acid,
undeecne acid, dodecene acid, tridecene acid, letradecene acid,
pentadecene acid, hexadecene acid, heptadecene acid, octadeccne acid,
\S nonadecene acid, icosene acid, henicosene acid, docosene acid,
tricosenc acid, and lelracosene acid; and mixtures thereof, and also
include ail substituted isomers of these fatly acids.
[0066] As the dicarboxylic acids, preferably, tricarboxylic acids having
2 to 40 carbon atoms, and more preferably, dicarboxylic acids having 5
20 to 36 carbon atoms arc used. Among them, dimer acids obtainable by
dimerizing unsaturated fatty acids having the number of carbon atoms
oT 6 to 18, and alkyi or alkenyl succinic acids are preferably used.
Examples of die dimer acids include a dimer acid oT oleic acid.
Moreover, among the alkyi or alkenyl succinic acids, alkenyl succinic
25 acids ai*e preferable, and alkenyl succinic acids having an alkenyl group
having the number of carbon atoms of 8 to 18 arc more preferable.
23
FPi 3-0753-00
[0067] As the hydroxyfatty acids, hydroxyfatty acids having the
number of carbon atoms of 6 to 24 are preferably used. Although the
number of hydroxy groups in the hydroxyfatty acids may be one or may
be more than one, those having 1 to 3 hydroxy groups are preferably
5 used. Examples of these hydroxyfatty acids include rccinolcic acid.
[0068] The naphlhenie acids indicate carboxylic acids in petroleum,
which are compounds in which a -COOH group is bonded to a
naphthene ring.
[0069] The resin acids indicate organic acids present in a free state or as
10 esters in a natural resin.
[0070] The oxidized waxes are those obtainable by oxidizing waxes.
Although the waxes used as a raw material ave not particularly limited,
specifically, examples thereof include paraffin waxes, microcrystalline
I waxes, and petrolatums obtainable when refining petroleum distillate,
15 and polyolefin waxes obtainable by synthesis.
[0071] The lanolin fatly acid is a carboxylic acid obtained by refining,
such as hydrolysis, of a waxy material that adheres to sheep wool.
[0072] Among these carboxylic acids, in terms of a rust preventive
property, a degreasing properly, and storage stability, naphthenic acids
20 and dicarboxyiic acids are preferable, naphthenic acids and dimer acids
are more preferable, and naphthenic acids and a dimer acid of oleic acid
are more preferable.
[0073] Examples of the (R5) carboxylic acid salt include alkali metal
salts, alkali earth metal salts, and amine salts of the above-described
25 carboxylic acids excluding naphthenic acids. Examples of the alkali
metal which constitutes the carboxylic acid salt include sodium and
24
FP13-0753-00
potassium, and examples of the alkali earth metal include barium,
calcium, and magnesium. Among them, a calcium salt is preferably
used. Moreover, examples of the amine include the amines
exemplified in the explanation of the amines. In the ease of a barium
5 salt, safely for human bodies and ecosystems may become insufficient,
[00741 Examples of the (E5) paraffin wax as a rust preventive
component include paraffin waxes, micro crystal line waxes, and
petrolatums obtainable when refining petroleum distillate, and
polyolelm waxes obtainable by synthesis.
10 [0075] Although not particularly limited, examples of the oxidized wax
used as a raw material for the (E6) oxidized wax salt include oxidized
paraffin waxes produced by oxidizing waxes such as the
above-described paraffin waxes.
[0076] When Jlie oxidized wax sail is an alkali metal salt, examples of
J 5 the alkali metal used as a raw material include sodium and potassium.
When the oxidized wax salt is an alkali earth metal salt, examples of the
alkali earth metal used as a raw material include magnesium, calcium,
and barium. When the oxidized wax salt is a heavy metal salt,
examples of the heavy metal used as a raw material include zinc and
20 load- Among them, a calcium salt is preferable. It is to be noted that,
in terms of safety for human bodies and ecosystems, the oxidized wax
salt is preferably not a barium salt and a heavy metal salt.
[0077] Examples of the (E7) boron compound include potassium borate
and calcium borate,
25 [0078] Tn the present embodiment, one of the above-described rust
preventive agents may be used alone, or a mixture of two or move of the
25
FP13-0753-00
same type of the rust preventive agents may he used, and furthermore, a
mixture of two or more of the different types of the rust preventive
agents may be used.
[0079] Tn leims of exhibiting a better rust preventive property, as the
5 above-described rust preventive agents, a nonionic surfactant, a
sarcosine acid, and a paraffin wax are preferable, and these three types
are preferably used in combination.
[0080] in addition to the above-described rust preventive agents,
alcohols typified by higher aliphatic alcohols; and phosphoric acid
10 derivatives and phosphorous acid derivatives typified by amine salts of
phosphoric acid monoesiers, phosphoric acid dicsters, phosphorous acid
esters, phosphoric acid, and phosphorous acid can be contained as a rust
preventive agent.
[0081] Although not particularly limited, in the ease where the rust
15 preventive agent other than the carboxylic acid of the above-described
rust preventive agents is used, in terms of a rust preventive property, the
content is preferably 0.1 mass% or more, more preferably 0.5 mass% or
more, and further preferably 1.0 mass% or more, based on the total
amount of the composition. Moreover, in terms of storage stability, the
20 content of the rust preventive agent other than the carboxylic acid of the
(O) component is preferably 20 mass% or less, more preferably 15
mass% or less, and further preferably 10 mass% or less, based on the
total amount of the rust preventive oil composition.
[0082] Furthermore, although not particularly limited, in the case where
25 the carboxylic acid of the above-described rust preventive agents is used
as a rust preventive agent, in terms of a rust preventive property, the
26
FP13-0753-00
content is preferably 0,01 mass% or more, more preferably 0.03 mass%
or more, and further preferably 0,05 mass% or more, based on the total
amount of the coniposition. When the content of the earboxylic acid is
less than the above-described lower limit, a rust preventive property
5 improving effect by the addition may become insufficient. Moreover,
the content of the earboxylic acid is preferably 2 mass% or less, more
preferably 1.5 mass% or less, and further preferably 1 mass% or less,
based on the total amount of the rust preventive oil composition.
When the content of the earboxylic aeid exceeds *he above-described
10 upper limit, solubility in a base oil becomes insufficient, and storage
stability may decrease.
[0083] Although a chlorine bleaching agent is sometimes used for the
puipose of decoloration when manufacturing the above-described rust
preventive agent, it is preferable that, in £he present embodiment,
15 non-chlorine compounds such as hydrogen peroxide be used as a
bleaching agent, or no decoloration treatment be carried out,
Moreover, chlorine compounds such as hydrochloric acid are sometimes
used in hydrolysis or the like of oils and fats, and in this ease, it is
preferable that non-chlorine acids or basic compounds be used.
20 Kuilhermore, the compound to be obtainable is preferably subjected to
sufficient washing treatment such as water washing.
[0084] The chlorine concentration of the above-described rust
preventive agent is not particularly limited as long as properties of the
rust preventive oil composition according to the present embodiment are
25 not impaired, but it is preferably 200 mass ppm or less, more preferably
100 mass ppm or less, further preferably 50 mass ppm or less, and
27
FP13-0753-00
particularly preferably 25 mass ppm or less.
[0085] The kinematic viscosity at 40°C of the rust preventive oil
composition according to the present embodiment is preferably 0.1
mni2/s or more, more preferably 0.5 mmVs or more, and further
5 preferably 1.0 mmVs or more, and preferably less than 20 mm2/s( more
preferably 15 mm/s or less, and further preferably 10 mm /s or less,
though not particularly limited. When the kinematic viscosity is less
in
than 0.1 mm /s, an oil film cannot be maintained, and thus, problems
with a rust preventive properly may arise, and when it is 20 mm /s or
10 more, a rust generation factor removal property may decrease, which is
not preferred.
[0086} The rust preventive oil composition of the present invention may
further contain an ester base oil and an ester additive agent (collectively
referred to as "ester") in the range causing no problem in hydrolysis
15 stability. Examples of the ester base oil include an ester of
monohydric alcohol and monocarboxylic acid (referred to as monoester)
and an ester of polyhydrie alcohol and monocarboxylic acid and/or
poiyear boxy lie acid (referred to as polyoi ester); and examples of the
ester additive agent include a partial ester of a polyhydrie alcohol, an
20 eslerifted oxidized wax, an eslerified lanolin (ally acid, and an alkyl or
alkenyl succinic acid ester. The content of ester is preferably 3 mass%
or less, more preferably 1 mass% or less based on the total amount of
the rust preventive oil composition, and no content of ester is
particularly preferred.
25 [0087J The rust preventive oi! composition according to the present
embodiment may further contain other additive agents as necessary.
2R
FP13-0753-00
Specifically, examples thereof include sulfurized oils and fats,
sulfurized esters, long-chain alkylzinc ditbiophosphales, phosphoric
acid esters such as tricresyl phosphate, oils and fats such as laid, fatty
acids, higher alcohols, calcium carbonate, and potassium borate which
5 have significant press moldability improving effect and lubricating
properly improving effect; phenol-based or amine-based antioxidants
for improving antioxidalion performance; corrosion inhibitors for
improving corrosion preventive performance, such as benzolriazole or a
derivalive thereof thiadiazole, and benzotluazoie; film-forming agents
10 such as acrylic polymers and slack waxes; antifoaming agents such as
methylsiliconc, fluorosiiieonc, and polyacrylate, and mixtures thereof.
Tt is to be noted tliat the content of the above-described other additive
agents is arbitrary, but the total content of these additive agents is
preferably 10 mass% or less based on the total amount of the rust ,
15 preventive oil composition according to the present embodiment.
[0088] The rust preventive oil composition according to the present
embodiment usually does not substantially contain water, is made not to
contain water other than moisture thai is naturally absorbed, and is used
without being diluted with water intentionally. However, in the ease of
20 expecting the effect of finger print removal property, blending with 5
mass% or less of water is preferred, based on the total amount of the
rust preventive oil composition.
[0089] Tn the rust preventive oil composition according to the present
embodiment, the content of each of barium, chlorine, and lead is, in
25 terms of element, preferably 1000 mass ppm or less, more preferably
500 mass ppm or less, further preferably 100 mass ppm or less, further
29
FP13-0753-00
more preferably 50 mass ppm or less, even more preferably 10 mass
ppm or less, particularly preferably 5 mass ppm or less, and further
preferably 1 mass ppm or less, based on the total amount of the
composition. When either one of these elements has a content
5 exceeding 1000 mass ppm, safety for environments such as human
bodies and ecosystems may become insufficient.
[0090J It is to be noted that the content of the element in the present
invention indicates a value measured by the following methods. That
is, the content means a content (mass ppm) based on the total amount of
10 the composition, measured in conformity with ASTMD 5185-95 in the
case of barium, zinc, and lead, and IP "PROPOSED METHOD AK/81
Determination of chlorine Microcoulometry oxidative method" in the
case of chlorine. The detection limit of each element in the
above-described measuring methods is usually 1 mass ppm.
15 [0091] The rust preventive oil composition according to the present
embodiment may achieve all of a rust preventive property, a rust
generation factor removal property, a degreasing property, storage
stability, and a wasliing property in a high level and a balanced manner,
and may be suitably used as a rust preventive oil for various metal
20 members- Jn particular, regarding a msl preventive property, time
during which Grade A of rust generation (nisi generation of 0%) is
maintained in a salt water spray test specified by JIS K 2246 "Rust
preventive oils11 may be achieved 16 hours or more, and
non-conventional excellent performance may be maintained,
25 [0092] The metal member that is a body to be treated is not particularly
limited, and specifically, examples thereof include surface-treated steel
30
FP13-0753-00
sheets such as a cold-rolled steel sheet, a hot-rolled steel sheet, a
high-tensile steel sheet, and a zinc-coated steel sheet, which are to be an
automobile body or electrical product body, metal sheet materials such
as a primitive sheet for tinning, an aluminum alloy sheet, and a
5 magnesium alloy sheet, and furthermore, bearing parts such as a rolling
bearing, a tapered rolling bearing, and a needle bearing, construction
steel, and precision parts.
Conventional rust preventive oils for the foregoing metal
inembers include intermediate rust preventive oils used during processes
10 such as a working process of metal members, shipping rust preventive
oils used to prevent rust during shipping, and washing rust preventive
oils used during a washing process for removing foreign bodies before
being subjected to press working or for removing foreign bodies before
shipment in manufacturers of metal sheets, and the eomposition of the
15 present invention can be used for all of these intended purposes,
The rust preventive oil composition according to the present
embodiment has excellent water removal property and finger print
removal property in addition to rust preventive property, so that
excellent rust preventive effect may be exhibited even on a body to be
20 treated having a surface to which water or stain such as a linger print is
attached. Accordingly, the body to be treated to which the rust
preventive oil composition according to the present embodiment is
applied is not limited to a prewashed body to be treated, including a
body to be treated not subjected to a washing treatment.
25 Namely, examples of the preferred aspect of a use of the
composition according to the present embodiment include the following
31
FP13-0753-00
aspects (i) and (ii):
(i) A use of a composition as rust preventive oil composition,
tlie composition comprising a base oil comprising a mineral oil
and a naphthenic acid salt, with the base oil content of 50 mass% or
5 more based on the total amount of the composition,
the composition being applied to a washed body to be treated;
(ii) A use of a composition as rust preventive oil composition,
the composition comprising a base oil comprising a mineral oil
and a naphthenic acid salt, with the base oi! content of 50 mass% or
10 more based on the total amount of the composition,
the composition being applied to an unwashed body to be
treated.
Regarding to the components and die content of the
composition, the body to be treated, and the like, the same as in the rust
15 preventive oil composition according to the present embodiment is
applied to the use describe above.
[0093J A method of applying the rust preventive oil composition
according to the present embodiment to a body to be treated is not
particularly limited, and for example, it may be applied to a metal
20 member by spraying, dropping, transfer with a felt material or the like,
electrostatic oiling and the like. Among these applying methods, the
spraying method is preferable because an oil film thickness may be
made uniform by application wilh fine mist, A coating applicator
when using the spraying method is not particularly limited as long as the
25 rust preventive oil composition according to the present embodiment
may be atomized, and for example, any of an air spray type, an airless
32
FP13-0753-00
spray type, and a hot-inelt type may be used. Tn the application
process, after applying the excess washing and rust preventive oil
composition, a step of draining using a centrifugal separator, or a step of
draining by being left for long periods of time is preferably provided.
5 [0094] hi the case where the rust preventive oil composition according
to the present embodiment is used as a wash oil, a large excessive
amount of the rust preventive oil composition according to the present
embodiment is supplied to the surface of the metal member by spraying,
showering, immersion application or the like so that good water
10 removal and subsequent rust prevention may be carried out.
Furtheimore, by also carrying out surface cleaning using a roll brush or
the like after the above-described metal working process as necessary,
efficiency of removing foreign bodies may be increased.
[0095] When carrying out washing using the rust preventive oil
15 composition according to the present embodiment, the amount of the oil
attached to the surface of the metal member is preferably adjusted by
also carrying out surface treatment oTllic metal member using a ringer
roll or the like,
[0096] In eveiy case oflhc above-described applying methods of the
20 tust preventive oil composition according to the present embodiment, an
excessive amount of the washing and rust preventive oil composition
that has been applied to the metal member is preferably recovered,
circulated, and reused. In addition, it is preferable that, when
circulating the rust preventive oil composition according to the present
25 embodiment, removal of foreign bodies mixed In a circulating system
be also earned out. For example, the removal of foreign bodies may
33
FP13-0753-00
be carried out by providing a filter in a circulation pathway of the rust
preventive oil composition according to the present embodiment, and
preferably shortly before spraying the rust preventive oil composition
according to the present embodiment toward the metal member.
5 Moreover, by providing a magnet at the bottom of a tank that stores the
rust preventive oil composition according lo the present embodiment,
foreign bodies such as abrasion powder may be absorbed by magnetic
force to be removed
[0097) Performance of the rust preventive oil composition reused in
10 such a process may be decreased due to mixing of a preceding process
oil or the like. Therefore, it is preferable that, when reusing the rust
preventive oil composition according to the present embodiment,
periodic measurement of the kinematic viscosity and the density of an
, oil to be used, a copper corrosion test, a rust preventive property test and
15 the like be caii'ied out to manage the properties, and oil change, drain
disposal, tank cleaning, an oil purifying operation and the like be earned
out as necessary.
[0098] Regarding a disposed oil solution, the oil solution is used
directly, or with being diluted with a solvent or a low-viscosity base oil,
?.{) in a line whose required performance for the washing ami rust
preventive oil composition is lower than a line used before disposal so
that the total amount oTlhe oil used may be decreased When the rust
preventive oil composition according to the present embodiment is
stored in a tank, it is preferably supplied depending on the amount of the
25 composition reduced in the tank. Tn this ease, not always the same
composition as the composition that is filled initially, but a composition
34
FP13-0753-00
in which an additive agent for eliciting performance to be enhanced is
increased or the like may he supplied on a moment-to-moment basis.
Alternatively, a composition whose viscosity is decreased by a method
of reducing the content of a high-viscosity base oil or the like may be
5 supplied to maintain washing capacity of the washing and rust
preventive oil composition.
[0099] When the rust preventive oil composition according to the
present embodiment is used in a washing process tor removing foreign
bodies before shipment in a manufacturer of metal sheets, metal sheets
10 may be shipped by being wound in a coil immediately after the washing
process or being stacked as sheet materials. Tliis method has the
advantage in that the amount of foreign bodies attached is small and
washing may be easily and surely carried out even when carrying out
the wasliing process with the washing rust preventive oil shoitly before
15 a press process in press working. Tt should be understood that rust
preventive treatment may be carried out in two stages by providing a
process of applying a rust preventive oil again after a wasliing process
with a wasliing rust preventive oil at a steel sheet manufacturing place.
Examples
20 [01001 Hereinafter, the present invention will be described in further
detail with reference to examples and comparative examples, but the
present invention is not limited to the following examples.
[01011 Tramples ' Lo 56, Comparative Examples 1 to 31
In Examples 1 to 56 and Comparative Examples 1 to 3, rust
25 preventive oil compositions having compositions shown in Tables 1 to 8
were prepared, respectively, using components shown below.
35
FP13-0753-00
(A) component
AI: a mineral oil liaving a kinematic viscosity at 40°C of 0.7 rmn2/s
(aromatic component: 0.1 mass% or less)
A2: a mineral oil having a kinematic viscosity at 40°C of 1.8 mm /s
5 {aromatic component: 0,1 mass% or less)
A3: a mineral oil having a kinematic viscosity at 40°C of 2,3 ram /s
{aromatic component: 0.8 mass% or less)
A4: a mineral oil having a kinematic viscosity at 40°C of 2.7 mmVs
(aromatic component: 9.8 mass% or less)
10 A5: a mineral oil having a kinematic viscosity at 40°C of 6.5 mm /s
A6: a mineral oil having a kinematic viscosity at 40°C of 9.1 mm /s
A7: a mineral oil having a kinematic viscosity at 40°C of64mm?/s
A8: a mineral oil having a kinematic viscosity at 40°C of 209 mm /s
A9: a mineral oil having a kinematic viscosity at 40°C of 260 mm /s
15 A10: a mineral oil having a kinematic viscosity at 40°C of 581 mmVs
All: a mineral oil having a kinematic viscosity at 40°C of 667 mm /s
A12: rapeseed oil (kinematic viscosity at 40°C : 38 mm /s)
Component (B)
B1: zinc naphllienale
20 B2: calcium naphthenate
B3: copper naphthenate
B4: manganese naphthenate
Component (C)
CI: hexylamine salt of hexanoic acid
25 C2: oetylammc salt of oelanoic acid
C3: oclylamine salt of dodecanoic acid (lauric acid)
36
FP13-0753-00
C4; dodecylamine salt of octanoic acid
Component (D)
Dl:ediylcncdiaminc sulfonate
D2: calcium sulfonate {base value: 307 mg KOH/g)
5 Component (E)
HI: olcoyl savcosine {oleoyl(melhyl)aminoucetie acid)
E2: copolymer of ethylene oxide and propylene oxide (molecular
weight: 3400)
B3: naphlhenic acid
10 E4: calcium oieate salt
E5: paraffin wax
E6: 2,6-di-tert-butyl-p-cresol (DBPC)
E7:benzolria/ole(RTA)
E8: mixture of sorbitan monooieate and sorbitan dioleate
15 [0102] Next, for the respective rust preventive oil compositions of
Examples I lo 56 and Comparalive Examples 1 to 3, the following
evaluation tests were carried oul.
[0103J
The evaluation was carried out in conformity with a neutral salt
20 water spray lest of JIS K 22Ab "Rusl preventive oils"- lime (h) until
rust was generated was measured and evaluated, and the evaluation was
carried out each predetermined time (16, 24, 36, 48 hours). The
sample oil was used within 24 hours after preparation. In the case that
separation was observed due to poor stability of an oil solution, the
25 sample was subjected to the test In a sufficiently stirred stale.
[0104] < Rust preventive property test 2>
37
FP13-0753-00
The evaluation was carried out in conformity with a neutral salt
water spray test ofJTS K 2246 "Rust preventive oils" in the same way as
in the rust preventive property test 1. Tn the present test, the sample oil
was placed in a constant temperature and humidity bath at 50°C and
5 95% RH immediately after preparation, left to stand for 30 days, and
(hen used. In the case that separation, precipitation or the like was
observed in the oil solution, the sample was subjected to die test in a
sufficiently stirred stale.
[0105] < Rust preventive property test 3>
10 The evaluation was carried out in confonnily with a neutral salt
water spray test of JTS K 2246 "Rust preventive oils" in the same way as
in the rust preventive properly test 1. In the present test, the test piece
was immersed in a sodium chloride aqueous solution with a
concentration of 2 mass% for 10 seconds after poli4iing, and then
15 oscillated tor 1 minute, being kepi in vertical position. The oscillation
speed was set to 10 mm/s, and the sample piece reciprocated wilbin a
distance of 100 mm. The oil solution was then drained ("or 24 hours
and evaluation was performed according lo the testing method. By the
testing method, the finger print removal property can be evaluated. In
20 the ease that water and sodium chloride contained therein are not
completely removed, the rust occurs earlier in comparison with the mst
preventive properly test 1 *
[0106] All of the rust preventive property tests 1, 2 and 3 using neutral
salt water spray tests were performed 3 times for evaluation,
25 considering the variation in data. The obtained results are shown in
Tables 1 to 8. Tor example, "AAA" in the Tables means all the three

CLAIMS
[Claim 1]
A rust preventive oil composition comprising:
a base oil comprising a mineral oil, and
a naphthenic acid salt;
the content of the base oil being 50 mass% or more based on a
tolal amount of the rust preventive oil composition.
•rClaim2]
The rust preventive oil composition according to claim 1,
wherein the mineral oil is a mixture of a mineral oil having a kinematic
viscosity at 40°C of 7 mmVs or less and a-mineral oil having a
kinematic viscosity at 40°C of 250 inm3/s or more.
i-
[Claim 3]
The rust preventive oil composition according to claim 3 or %
further comprising a tatty acid amine salt.
[Claim 4 The nisi preventive oil composition according to any one of
claims 1 to 3, further comprising a sulfonic acid sail.
[Claim 5]
The rust preventive oil composition according lo any one of
claims 3 to 4, comprising no ester.
[Claim 61
The rust preventive oil composition acconiing to any one of
claims 1 to 5} wherein the kinematic viscosity at 40"C of the rust
preventive oil composition is 0.5 lo 10mm2/s.