JPS5980498A - Cold heading oil for steel - Google Patents

Abstract

PURPOSE:A cold heading oil for steel useful as a cold heading oil of high-speed mill grease, etc., having improved lubricating properties and annealing properties, containing a specific mixed monoester. CONSTITUTION:(A) 32-64C (mixed) monoester consisting of 16-20C fatty acid and a monohydric fatty alcohol is blended with (B) 32-64 (mixed) monoester (with the proviso that the difference of carbon number of the ester and the fatty acid is <=8) of 21-32 fatty acid and a monohydric fatty alcohol, to give the desired cold heating oil for steel having <=100 total iodine value. Stearic acid behenyl alcohol ester, etc. may be cited as the example of the component A, and behenic acid alcohol ester, etc. as the component B, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides high-speed ξ clean rolling oil, that is, lubricity,
This invention relates to a cold rolling oil for individual use that has excellent annealing properties.

In recent years, demand for thin steel plates or high-strength steel plates has increased, and in order to increase production efficiency, faster cold rolling has been required. On the other hand, from a process and energy perspective, there is also a strong demand for directly annealing cold-rolled steel sheets without degreasing, in order to improve production efficiency.

High-speed mill-clean rolling oil meets these requirements, and exhibits sufficient lubrication performance even under harsh conditions of high speed, high temperature, and high pressure. It also disappears during annealing and leaves no residue after annealing, in other words, it has excellent annealing properties. It must be of the same type. However, none of the commercially available products satisfy the above requirements, and those with good lubricity have poor annealing properties, while those with excellent annealing properties have a common drawback of poor lubricity. .

This is mainly due to the properties of the oiliness improver used as an additive in high speed mill clean rolling oil.

In other words, an oiliness improver with excellent lubricity, that is, an oiliness improver that does not easily separate from the roll contact surface of the steel sheet even at high temperatures, maintains a thermally stable state up to high temperatures when the rolled steel sheet is subsequently annealed, and after the middle stage of annealing. also generates decomposition gas,
Surface staining due to carden deposits is likely to occur.As described above, the lubricity and annealing properties of the oiliness improver are essentially contradictory properties.

Therefore, rolling oil that satisfies both lubricity and annealing properties,
For example, it is expected that it will be quite difficult to develop a rolling oil that has lubricity close to oil-based rolling oils and annealing properties that are close to mineral oil-based rolling oils. We conducted research on the lubricity and annealing properties of these materials when used alone or in combination.
As a result, they found that it is extremely effective to use a monoester of a fatty acid with a large number of carbon atoms and a monohydric aliphatic alcohol with a large number of carbon atoms (hereinafter simply referred to as a high-carbon monoester) as an oiliness improver.

In other words, conventionally, as the number of carbon atoms in the fatty acids and alcohols in monoesters increases, lubricity improves, but annealing properties deteriorate significantly, so high-carbon monoesters cannot be used as oiliness improvers in high-speed mill-clean rolling oils. The present inventors believed that monoesters are originally compounds with good annealing properties in terms of their molecular structure, and that as the number of carbon atoms in fatty acids and alcohols increases, annealing properties worsen. We thought that it might be possible to satisfy both lubricity and annealing properties depending on the selection of the carbon number, and conducted a systematic study on the effect of the carbon number of monoester on lubricity and annealing properties.

Thus, the present inventors found that from monoesters of group (4) that satisfy the following formula (4), where y is the number of carbon atoms in a monoester consisting of a fatty acid with X carbon atoms and m aliphatic alcohols, One or more types, Q3 that satisfies formula (6)
When the total iodine value is limited to 100 or less for a mixture of one or more monoesters selected from group (B), or a mixture of two or more monoesters selected from group (B), The present invention was completed based on the finding that the lubricity is significantly improved compared to the case of adding it alone, and there is no problem with annealing properties.

Next, the effects obtained by the present invention will be explained in more detail. First, as a preliminary study, in order to understand the effects of the number of carbon atoms in fatty acids and monoesters on lubricity and annealing properties, we investigated the effects of myristate cetyl alcohol ester, myristate acid cetyl alcohol ester, stearate cetyl alcohol ester, A total of 8 types were tested: 6 types: sour acid ceryl alcohol ester, cerotic acid ceryl alcohol ester, serotinic acid ceryl alcohol ester, beef tallow as a representative example of excellent lubricity, and refined mineral oil as a representative example of an excellent annealing property. As oil,
Lubricity and annealing properties were evaluated.

Here, lubricity is measured by the number of reciprocating frictions until seizure occurs in the Powden friction test, and the one with the best lubricity is ranked in order of 11 or less, br e t d + e * f and 6
A graded evaluation was performed. In this case, beef tallow was rated B and refined mineral oil was rated F.

In addition, annealing property was evaluated by applying a test oil to a steel plate and evaluating the surface cleanliness of the steel plate after annealing in the following six grades. That is,
Is a for car? b is car? Although contamination occurs, it is extremely small, C is also small, d is medium, e is also large, and f is extremely large.

Table 1 shows the evaluation results of the above eight types of test oils.
Next, the lubricity and annealing property of the above six types of monoesters were evaluated in the same manner by mixing them in a ratio of 1:1 for all combinations of two types. As a result, the annealing properties were evaluated as either unchanged or intermediate in all cases.

On the other hand, regarding lubricity, cerotic acid poucheryl alcohol ester and cerotic acid cetyl alcohol ester, cerotic acid poucheryl alcohol ester and stearic acid poucheryl alcohol ester, cerotic acid poucheryl alcohol ester and stearic acid cetyl alcohol ester, Stearic acid cetyl alcohol ester and cerotic acid cetyl alcohol ester, cerotic acid cetyl alcohol ester and stearic acid cetyl alcohol ester, that is, monoesters with a fatty acid having 26 carbon atoms, and monoesters with a fatty acid having 18 carbon atoms and 26 It has been found that superior lubricity can be obtained by combining the following monoesters. Therefore, regarding this characteristic phenomenon, regarding the relationship between the carbon number (x) of the fatty acid and the carbon number (y) of the ester, when many monoesters are used alone and in combination, the group (4) that satisfies the following equation (4) is found. One or more monoesters and one or two monoesters of group (6) that satisfy formula (6)
It has been found that the lubricity is significantly improved only when two or more types of monoesters of group CB) are mixed, or when two or more types of monoesters of group CB) are mixed.

In particular, the reason why the lower limit of fatty acid carbon number 16 is set as the lower limit of the group is that monoesters of fatty acids having carbon number 15 or less do not improve lubricity even when mixed with the monoesters of group 1). (
The reason why the number of carbon atoms in the fatty acid at the boundary between group 2) and group (B) was limited to 21 is because monoesters having 20 or less carbon atoms do not improve lubricity even when two or more types are mixed. Furthermore, the upper limit of the number of carbon atoms in the group (6) fatty acid is limited to 32 because if it is 33 or more, annealing properties become difficult and the oil loses its suitability as a high-speed mill-clean rolling oil. The number of carbon atoms in the monoester was also limited to 32 to 64 for the same reason, but for the lower limit of group 03), the number of carbon atoms in the alcohol (31-2) was set to 8.
This is because the lubricity of monoester alcohols having 7 or less carbon atoms does not improve even when mixed with the group or group (B).

The mixing ratio of the monoester of the prisoner group and the monoester of the group 0) or the mixing ratio of each monoester of the group (6) is not particularly limited, but generally the monoester of the group (4) and the monoester of the group (6) are mixed.
When mixing monoesters of the group, the weight ratio is 1:9 to 1
9:1, preferably 1:5 to 9:1, when mixing each monoester of the 0@ group, which shows a significant improvement in lubricity, 1:19 to 19:1, preferably 1:9 to 9: It is 1.

The iodine value of the mixed monoester is limited to 100 or less in order to reduce the degree of unsaturation and improve annealing properties.

Hereinafter, the present invention will be further explained in detail using specific combinations.

Combination of prisoners: This example is an example in which hastearate hehenyl alcohol ester and oleic acid phenyl alcohol ester are mixed.

The lubricity and annealing properties resulting from mixing are shown graphically in FIG. No improvement in lubricity was observed regardless of the mixture.

Combination with group (4): This example shows a case where (1' stearic acid behenyl alcohol ester, !=(B) group) behenyl alcohol ester is mixed. Lubricity due to mixing , annealing properties are shown graphically in Figure 2. Significant improvement in lubricity was observed when the proportion of behenyl alcohol stearate mixed with coal was 10 to 80%; It was found that lubricity equivalent to that obtained was obtained.In addition, the annealing property at that time was evaluated as a, which was as good as in the case of using it alone.

0) Combination of groups: This example is an example in which seryl alcohol cerotinate and montanyl alcohol ester gutucerate are mixed. The lubricity and annealing properties of the mixture are shown graphically in Figure 3. A remarkable improvement in lubricity was observed when the proportion of montanyl alcohol ester of cerotate mixed with seryl alcohol ester of cerotate was 5 to 9 degrees, and 30%
It was found that lubricity superior to beef tallow can be obtained by mixing at a temperature of ~7°. Furthermore, the annealing property at that time was evaluated to be as good as when it was used alone.

Combination of non-prisoners, CB) and (B) groups: This example is not included in groups (A) and (B) /f Rumitic acid octyl alcohol ester,! = (B) This is an example of mixing with behenyl alcohol ester of behenic acid.

The lubricity and annealing properties of the mixture are shown graphically in FIG. No improvement in lubricity was observed regardless of the mixture.

Combination of prisoner group and group (6): This example uses a 1:1:1 mixture of palmitic acid stearyl alcohol ester, stearic acid aracyl alcohol ester, oyohyarachic acid behenyl alcohol ester of group (4) and group (B). An example is shown in which a 1:1:1 mixture of behenyl alcohol ester of behenate, cetrail alcohol ester of behenate, and carnaubir alcohol behenate was mixed.

The lubricity and annealing properties of the mixture are shown graphically in FIG. (
A remarkable improvement in lubricity is observed when the ratio of group (B) to group 5) is 6 to 90 inches.

In addition, as the high carbon monoester in the present invention, for example, the following chemicals can be used. All of these have been confirmed to exhibit similar chemical properties. First, the fatty acids constituting the high carbon monoester are lumitic acid, palmitooleic acid, stearic acid, isostearic acid, oleic acid, linoleic acid, arachidic acid, doleic acid, arachidonic acid, arachidonic acid,
Examples include behenic acid, erucic acid, elaidic acid, lignoceric acid, cerotic acid, isohebutacanoic acid, montanic acid, melisic acid, and laxelonic acid.

Examples of -valent aliphatic algol include n-octyl alcohol, 2-ethylhexyl alcohol, decyl alcohol, undecyl alcohol, lauryl alcohol, tridecyl alcohol, tetradecyl alcohol, cetyl alcohol, fiseteryl alcohol, stearyl alcohol, and isostearyl alcohol. Alcohol, oleyl alcohol, arachyl alcohol, heneicosanol, 2/
Nyllauryl alcohol, gatrail alcohol, behenyl alcohol, cetrail alcohol, carnaravir alcohol, 2-decatyltetradecyl alcohol, 2
-f Catylpentadecyl alcohol, 2-undecatyltetradecyl alcohol, 2-undecatylpentadecyl alcohol, Seri/I/ 7 /l/ j -A/
, isope f tacosyl alcohol, ophtacosyl alcohol, myricyl alcohol, rough ceryl alcohol, 2-
Examples include hexadecatyl octadecyl alcohol, 2-octadecatyl octadecyl alcohol, 2-octadecatylcosanol, 2-octadecatyl docosanol, 2-docosatil docosanol, 2-docosatyl hexatoconol, and the like.

Among the monoesters consisting of a combination of these, the monoesters included in group (g) include cetyl palmitate alcohol ester, stearyl palmitate alcohol ester, oleyl palmitate alcohol ester, aracyl palmitate alcohol ester, and palmitate heneiko. Sanol ester, norotic acid 2
- Nonyl lauryl ester, behenyl palmitate alcohol ester, cetrail palmitate alcohol ester, carnaubil palmitate alcohol ester, seryl palmitate alcohol ester, myricyl palmitate ester, luceryl palmitate alcohol ester, palmitic acid 2 -Octadecatyl docosanol ester, 2-docosate 4-rumitic acid hexadocosanol ester, stearic acid tetradecyl alcohol ester, stearic acid cetyl alcohol ester, stearic acid stearyl alcohol ester, stearic acid oleyl alcohol ester, stearic acid arakyl ester Alcohol ester, stearic acid trail alcohol ester, stearic acid heneicosanol ester, stearic acid behenyl alcohol ester, stearic acid cetrail alcohol ester, stearic acid cetrail alcohol ester, stearic acid ceryl alcohol ester, stearic acid ceryl alcohol ester, stearic acid myricyl Alcohol ester, stearyl oleate alcohol ester, oleyl oleate alcohol ester, oleic acid trail alcohol ester, lauryl arachinate, tetradecyl arachinate alcohol ester, cetyl arachinate alcohol ester, stearyl arachinate alcohol ester, oleyl arachinate Alcohol ester, arachidic acid araki/l/7/l/j-ru ester, arachidic acid cadreyl acetate: I-A/ ester, arachidic acid 2-
Examples include undecatyltetradecyl alcohol ester, behenyl arachilate alcohol ester, cetrail arachilate alcohol ester, carnaubyl arachinate alcohol ester, and 2-hexadecatyl octadecyl arachilate alcohol ester.

Monoesters included in group (B) include undecyl alcohol ester of eicosanoate, lauryl alcohol ester of eicosanoate, tritecyl alcohol ester of eicosanoate, tetradecyl alcohol ester of heneicosanoate, cetyl alcohol ester of heneicosanoate, and fiseteryl heneicosanoate. Alcohol ester, heneicosanoic acid stearyl alcohol ester, heneicosanoic acid isostearyl alcohol ester, heneicosanoic acid oleyl alcohol ester, heneicosanoic acid aralyl alcohol ester, heneicosanoic acid is trail alcohol ester, heneicosanoic acid behenyl alcohol ester, heneicosanoic acid cetrail alcohol ester, heneicosanoic acid carnaubil alcohol ester, heneicosanoic acid seryl alcohol ester, heneicosanoic acid myricyl alcohol ester, heneicosanoic acid oxeryl alcohol ester, heneicosanoic acid 2-octadecatyl docosanol ester, heneicosanoic acid 2-octadecatyl pentacosanol ester, is doleic acid heneicosanol ester, gadoleic acid behenyl alcohol ester, doleic acid cetrail alcohol ester, behenic acid decyl alcohol ester, behenic acid lauryl alcohol ester, tetrahenic acid stearyl alcohol ester, behenic acid oleyl alcohol ester, behenic acid araki alcohol ester, behenic acid trail alcohol ester, metahenyl dihenyl alcohol ester, behenic acid cetrail alcohol ester, behenic acid carnaubil alcohol ester, behenic acid seryl alcohol ester, behenic acid myricyl alcohol ester, behenic acid 2 -1ytecatylbentadecyl alcohol ester, 2-undecatyltetradecyl behenate alcohol ester, 2-decatylpentadecyl behenate alcohol ester, 2-decatyltetradecyl behenate alcohol ester, stearyl erucinate 7/l/cole ester, oleyl erucic acid alcohol ester, erucic acid aralkyl alcohol ester, erucic acid trail alcohol ester, erucic acid behenyl alcohol ester, erucic acid cetrail alcohol ester, erucic acid carnaubyl alcohol ester, lignoceric acid octyl alcohol ester, lignocerin Acid tetradecyl alcohol ester, lignoceric acid stearyl alcohol ester, lignoceric acid oleyl alcohol ester, lignoceric acid aracyl alcohol ester, lignoceric acid hehenyl alcohol ester, carnaubyl lignoceric acid alcohol, lignoceric acid seryl alcohol ester, lignoceric acid octacosyl Alcohol, lignocerate myricyl alcohol ester, lignocerate oxeryl alcohol ester, cerotate 2-ethylhexyl alcohol ester, cerotate stearyl alcohol ester, cerotate oleyl alcohol ester, cerotate behenyl alcohol ester, cerutate carnaubil alcohol ester, Ceryl alcohol ester of cerotate, myricyl alcohol ester of cerotate, n-octyl montanate alcohol ester, stearyl montanate alcohol ester, isostearyl montanate alcohol ester, behenyl montanate alcohol ester, carnaubil montanate alcohol ester, montanic acid 2 -Decatyltetradecyl alcohol ester, montanic acid seryl alcohol ester, montanic acid montanyl alcohol ester, montanic acid behenyl alcohol ester, isoheptacanoic acid isohezotacosyl alcohol ester, melisic acid isostearyl ester, melisic acid oleyl alcohol ester, melisic acid Carnaubir alcohol ester, melisic acid isoheptacosyl alcohol ester, melisic acid seryl alcohol ester, melisic acid octacosyl alcohol ester,
Myricin [IJ sil alcohol ester, oleyl alcohol laurate, cetyl lactate alcohol ester, stearyl lactate alcohol ester, oleyl laurate alcohol ester, carnaubil lactate alcohol ester, myricyl lactate alcohol ester, oleyl laurate alcohol ester There are esters, etc.

The content of high carbon monoester mixture in rolling oil is
Although not particularly limited, since it has excellent properties, it can be used in a small amount, and experiments by the present inventors have confirmed that a remarkable improvement in the properties of rolling oil can be seen at 2 inches (by weight). . The upper limit is set at 85 mainly from an economic standpoint.
It is desirable to keep it to about %.

When high carbon monoesters are contained in the rolling oil according to the invention, the mixture of high carbon monoesters according to the invention may be added alone or in combination with the following compounds: Oils and fats, polybasic acid esters, etc. that are good but have poor annealing properties. Low-carbon monoesters (monoesters with fatty acids having 8 to 20 carbon atoms and alcohols having 1 to 18 carbon atoms), hydrocarbon polymers, etc., which have poor lubricity but are effective in cleaning the surface of steel sheets.

Examples of these compounds that can be added to the rolling oil of the present invention include the following.

First, the oils and fats include beef tallow, pork fat, coconut oil, rapeseed oil, and nom oil.

As the polybasic acid ester, 2-3 having 8 to 60 carbon atoms
It was determined through experiments that a material consisting of a basic acid and a monohydric alcohol having 1 to 18 carbon atoms and a molecular weight of about 600 to 3,000 is suitable.

Specifically, dioleyl sepatate, dilauryl 1,10-decanedicardate, distearyl azelate,
Civalmityl 1,10-decanedicate, dioleyl azelaate, dioctyl phthalate, dimethyl dimer acid, dilauryl dimer acid, dioleyl dimer acid,
Preferred are dihexyl trimerate, dilauryl trimerate, trioctyl trimerate, and the like.

Here, dimer acids are acids with 14 carbon atoms, such as myristoleic acid, palmitoleic acid, oleic acid, and linoleic acid.
-18 aliphatic monoenoic acid or dienoic acid 2-molecular wire metal material, and trimer acid refers to the same 3-molecular fine metal material.

Similarly, the following compounds have been experimentally determined to be suitable as low-carbon monoesters: octylic acid methyl alcohol ester, lauric acid oleyl alcohol ester, myristate 2-ethylhexyl alcohol ester, palmitic acid ethyl alcohol ester. , palmitic acid lauryl alcohol ester, palmitic acid butyl alcohol ester, oleic acid butyl alcohol ester, oleic acid octyl alcohol ester, oleic acid lauryl alcohol ester, stearic acid ethyl alcohol ester, stearic acid n-octyl alcohol ester, oleic acid oleyl alcohol ester , methyl arachinate alcohol ester, gadoleyl acid methyl alcohol ester, butyl arachiate alcohol ester, 2-ethylhexyl arachinate alcohol ester, instearyl myristate alcohol ester, capric acid stearyl alcohol ester, palmitic acid n-octyl alcohol ester, octyl acid oleyl alcohol ester, etc.

Suitable hydrocarbon polymers include polybutene, polyhexene, polybutene, polyisoethylene, hydrogenated polybutadiene, ethylene-propylene copolymer, and the like, each having a molecular weight of 1,000 to 15,000.

Furthermore, if necessary, the lubricity and annealing properties can be improved by using an appropriate antioxidant.

In particular, when the iodine value is 40 or more, it is desirable to use an appropriate antioxidant in combination. The antioxidants used here include amine derivatives, phenol derivatives, phosphites,
Hydroquinones are suitable.

Here, the amine derivatives include sym-diβ-naphthyl-p-phenyle/diamine, N,N'-diphenyl-p
-phenylenediamine, phenyl α-naphthylamine,
Phenyl β-naphthylamine, N,N'-N-see
-ff-p-phenylenediamine, N,N'-di-δ
Examples include -butyl-p-phenylenecyanine, octyldiphenylamine, phenylISOpropyl-p-phenylenediamine, phenothiazine, and 2-mercaptobenzothiazole cyclohexylamine salt.

As a phenol derivative, 2,6-di-t-butyl-4
-Methylphenol, 2,2'-methylenebis(4-methyl-t-butylphenol), 4,4'-thiobis(
3-Methyl-6-t-butylphenol) 2.4-dimethyl-6-t-butyl, phenol, nonylphenol ML3t5-) -bitroxybenzyl)benzene, etc.

Phosphites include alkyl phosphites, triphenyl phosphites, alkylphenyl phosphites,
Examples include alkyl thiophosphites.

Examples of hydroquinones include 2,5-di-t-butylhydroquinone, hydroquinone, hydroquinone caldic acid, hydroquinone-2,5-dicarnic acid, and trimethylhydroquinone.

The invention will now be further described in connection with embodiments.

Examples: Table 2 summarizes the composition and properties of the conventional rolling oil, and Table 3 summarizes the composition and properties of the rolling oil according to the present invention and the comparative rolling oil.

In each table, mineral oil, tallow fatty acid, emulsifier, corrosion inhibitor, and antioxidant are additives commonly used to impart properties necessary for practical rolling oil.

Table 2 Lubricity was evaluated using model mill rolling. Pickled hot-rolled 3.0 dragon steel plate is rolled with 5 arms at a rolling reduction of 35 inches to obtain a plate thickness of 0.351111. Lubrication is performed at the maximum rolling speed at which seizure defects do not occur during rolling. The evaluation was based on gender. The lubrication properties were evaluated using a 6-level standard, with A being the best and F being the worst. Evaluation A means that seizing defects do not occur even if the above-mentioned rolling speed is increased to 2000M/min in actual rolling.
minute, evaluation C is the same 1600M/minute, evaluation is the same 1400M/minute
/min, rating E is 1200M/min, rating F is 1000M/min.
M/min respectively.

Further, the annealing property was evaluated by annealing the rolled steel plate in an experimental furnace and dividing the surface cleanliness of the annealed steel plate into the same six levels as in the case of lubricity.

Ratings A, B, C, D, E, and F indicate that carbon stains do not occur when annealed in an actual furnace (rating A), very little carbon contamination occurs (rating B), the same occurs little (C), and the same The occurrence is moderate (D), the occurrence is high (E), and the occurrence is extremely high (F).

The lubricity and annealing properties were compared, and the worse result was used as the overall evaluation as a high-speed mill clean rolling oil.

[Previous 1] is known as a so-called highly lubricating rolling oil that contains 94% oil and fat, but has an annealing property of F,
Since the overall evaluation is F, it cannot be used as a high-speed mill clean rolling oil.

[Conventional 2] is a highly annealing rolling oil containing 94q6 mineral oils, but it has poor lubricity and is difficult to use as a high-speed mill clean rolling oil.

[Conventional 3, 4, and 5] are all commercially available as mill clean or high-speed mill clean rolling oils, and they exhibit fairly well-balanced characteristics compared to conventional 1 and 2, but the overall evaluation is still Stay at E-F.

From the above, it can be seen that the overall evaluation of these conventional rolling oils containing no high carbon monoester as high-speed mill clean rolling oils is E-F.

Next, (4) in the present invention was added to the rolling oil having the composition shown in Table 3.
Examples of blending various monoesters of group CB) and group CB) are shown below.

Table 3 - However, in the invention oil 15.16 described later, no mineral oil is added, and in the same invention oil 16, 2,6-di-t-butyl-4 is added as an antioxidant. - 2.5 parts by weight of methylphenol, 0.3 parts by weight of N,N'-diee-butyl-p-phenylenediamine, and 2.5 parts by weight of
-0.2 parts by weight of di-t-butylhydroquinone was added.

According to the present invention, monoesters of the prisoner group and group (B) were blended into the base rolling oil having the above composition.
- The composition, lubricity and annealing properties of the oil of the present invention obtained at that time are summarized in Table β together with those of the comparative oil.

In addition, in the same table and in the following explanation, the three types of numbers in brackets indicate the number of carbon atoms in fatty acids, monoesters, and alcohols in this order.

Comparison of single usage example and mixed usage example: [Comparative oil 1] and [Comparative oil 2] are monoester (22
-47-25) is used alone.

[Comparative oil 1] is a rolling oil containing monoesters of group (6) (7
) Examples include lubricity: C1 annealing property: A.

On the other hand, [Comparative oil 2] is an example in which the rolling oil contains 5%, and the lubricity is D and the annealing property is A1, making it unsuitable as a high-speed mill clean rolling oil. For it〔
[Before the present invention 1] and [Before the present invention 2] are B in the present invention.
An example is shown in which two or more monoesters of the group are mixed. [Pre-invention 1] is (22-48-26), (22-47-25
), (22-47-25), (22-46-24) 4
[Pre-invention 2] is (28-56-
Two types of monoesters, 28) and (22-44-22), were mixed. [Pre-invention 3] is one type from group B (22-
44-22) and one type from Group A (20-42-22) is shown below. [Pre-invention 1] is an example in which the rolling oil contains 50% monoester of group), and the lubricity is A,
The annealing property was evaluated as A, indicating that the lubricity was significantly improved compared to [Comparative oil 1]. Still [Pre-invention 3] is an example in which the rolling oil contains 2.5% of monoesters of group A and group B, and the lubricity is C. On the other hand, since the lubricity of the comparative oil field is D, it is clear that the lubricity is improved by mixing the monoester.

Lower limit example of fatty acid carbon number in group B: [Pre-invention 4] is a mixture of two monoesters having a fatty acid carbon number of 21 ((21-43-22) and (21-41-
20)) [Comparative oil 3] is an example in which two types of monoesters having 20 fatty acid carbon atoms ((20-42-22) and (20-40-20)) are used. show.

The lubricity of [Pre-Invention 4] is B, which is observed to be improved compared to [Comparative Oil 1], but the lubricity of [Comparative Oil 3] is E, and no improvement in lubricity due to mixing is observed. From this, it can be seen that monoesters having 21 fatty acid carbon atoms are at the lower limit of Group B.

Upper limit example of monoester carbon number: [Pre-invention 5] is a mixture of four monoesters each having a carbon number of 64 ((32-64-32), (30
-64-34), (24-64-40), (16-64
-48)) t, [Comparative oil 4] has the same number of fatty acid carbon atoms as the monoester used [Pre-invention 5], but the monoester has a carbon number of 65. 41'! Mixed ((32-65-33), (30-6
5-35) (24-65-41), (16-65-49
)) is used.

[Pre-inventive oil 5] and [Comparative oil 4] both have excellent lubricity of A, but the annealing property of [Pre-inventive oil 5] is C, while [Comparative oil 4] is D, which is high-speed mill clean. It has lost its suitability as rolling oil. From this, it can be seen that the upper limit of the number of carbon atoms in the monoester is 64.

Upper limit example of fatty acid carbon number in group (R): [Pre-invention 6] is a mixture of four monoesters whose fatty acids have 32 carbon atoms ((32-63-21)).

(32-56-24), (32-48-16).

(32-40-8)) and used as [Comparative Oil 5]
The alcohol carbon number is the same as the monoester used in [Pre-invention 6], but four types of monoesters with a fatty acid carbon number of 33 were mixed ((3a-64-21), (33-
57-24), (3a-49-16), (33-41-
8))).

[Pre-inventive oil 6] and [Comparative oil 5] both have excellent lubricity of A, but the annealing property of [Pre-inventive 6] is C, while [Comparative oil 5] is D, which is good for high-speed mill clean. It has lost its suitability as rolling oil. From this, it can be seen that the upper limit of the number of fatty acid carbon atoms in group B is 32.

Example of the lower limit of the number of fatty acid carbon atoms in group (g): [Pre-invention 7] is a mixture of one type of monoester (22-44-22') of the same group B used in [comparative oil 2] and a fatty acid carbon number of 16. Monoester (16-64-48), (16-
46-30), (16-38-22), (16-33-
[Comparative oil 6]
is the same monoester of group B used in [inventive oil 7] (
22-44-22) 1 type and the alcohol carbon number is the same as the monoester with 16 fatty acid carbon atoms used in [7] before the present invention, but the monoester with 15 fatty acid carbon atoms (1
5-63-48), (15-45-30) (15-37
-22) and (15-32-17) are mixed.

The annealing properties of [Pre-invention 7] and [Comparative oil 6] are both B, but the lubricity is B for [Pre-invention 7] and [Comparative oil 2].
], but [Comparative oil 6] shows no improvement in D. From this, it can be seen that the lower limit of the number of fatty acid carbon atoms in group (5), which shows a significant improvement in lubricity when mixed with group 03), is 16.

Lower limit example of monoester carbon number in group (B): [8 before the present invention
] is the same monoester (22-47-25) of group (B) used in [Comparative oil 1] and a monoester (24-47-25) in which the number of fatty acid carbon atoms is 24 and the number of carbon atoms in the monoester is
32-8) In an example of mixing one type, [Comparative oil 7] was the same monoester of group (B) (2) used in [Pre-invention 8].
2-47-25) Type 1 and fatty acid carbon number are [8 before the present invention]
An example is shown in which one type of monoester (24-31-7) having 31 carbon atoms is mixed. [Pre-invention 8] has a lubricity of B, which is superior to [Comparative oil 1], and an improvement in lubricity due to mixing is observed, whereas [Comparative oil 7] has a lubricity of D, and no improvement is observed. From this, the lower limit of the number of carbon atoms in the monoester of group (B) is 32
It can be seen that monoesters of 31 or less are not included in the prison group.

Lower limit example of monoester carbon number in group (4): [9 before the present invention
] One monoester (22-47-25) of the same (I3) group as used in Comparison Oil 1] and a monoester (with fatty acid carbon numbers of 16 and 18, and a monoester with a carbon number of 32) 16-32-16), (18-32-1
4), [Comparative oil 8] is the same monoester (B) group used in [Pre-invention 9] (22-
47-25) Type 1 and fatty acid carbon numbers are 16 and 18, the same as [Pre-invention 9], but the monoester has 31 carbon atoms.
Monoester (16-31-15).

An example in which two types of (18-31-13) were mixed is shown. [Pre-invention 9] has a lubricity of B, which is superior to [Comparative oil 1], and an improvement in lubricity due to mixing is observed, but [Comparative oil 8] has a lubricity of D, and no improvement is observed. From this, it can be seen that the lower limit of the number of monoester carbon atoms in the N group is 32.

Example of lower limit on the number of alcohol carbon atoms in monoesters of group (6): [
Before the present invention, 10) is a mixture of monoesters with a fatty acid carbon number of 24.28°32 and an alcohol carbon number of 8 ((2
4-32-8), (28-36-8), (32-40-
8)) [Comparative oil 9] has the same number of fatty acid carbons as the monoester used in [Pre-invention 1o], 24.28, 3
2. However, monoester 11 ((24-31-7), (28-35-7)) in which the alcohol carbon number is 7.

(32-39-7)) is shown below. [Before this invention 10
] has a lubricity of B, which is superior to [Comparative oil 1], and an improvement in lubricity due to mixing is recognized, whereas [Comparative oil 9] has a lubricity of E, and no improvement in lubricity is observed. From this(
It can be seen that the lower limit of the number of alcohol carbon atoms in the monoester of group B) is 8.

Example of using natural wax: [Invention 11] is an example of using a mixture of monoesters extracted from tallow. The monoester extracted at this time was found to be a mixture of only monoesters included in group (B) as a result of carbon number analysis using a gas chromatograph or the like.

[Pre-invention No. 11] had an extremely excellent lubricity of A, which is considered to be due to the improvement in lubricity due to mixing. In addition, the annealing property is B, which can be said to be an excellent high-speed mill clean rolling oil.

[Pre-invention 12] is an example in which a mixture of monoesters extracted from deep-sea fish was used. The monoester obtained at this time was found to be a mixture of monoesters of the CB) group and (4) group as a result of carbon number analysis using a gas chromatograph or the like. This [Pre-invention 12] had an excellent lubricity of B, which is considered to be due to the improvement in lubricity due to mixing. Also, the annealing property is C, and it can be said to be an excellent high speed mill clean rolling oil. [Invention Oil 13] is an example in which the mixed monoester used in [Invention Oil 12] was subjected to hydrogenation treatment. Both lubricity and annealing properties were improved by the hydrogenation treatment, and the evaluation was A, making it an extremely excellent high-speed mill clean rolling oil.

Example of upper limit of iodine value of mixed monoester: [Inventive oil 14] and [Comparative oil 10] are [Inventive oil 12]
This is an example of using a mixed monoester with an increased iodine value by adding gadoleic acid cetrail ester having a high iodine value to the mixed monoester used in the above. The iodine value of the mixed monoester was 100 [inventive oil 14], and the lubricity was B.
The annealing property is C, whereas [Comparative oil 10] with an iodine number of 110 has an annealing property of D, and loses its suitability as a high-speed mill clean rolling oil. From this, it can be seen that the upper limit of the iodine value is 100.

Example where a large amount of mixed monoester is used in rolling oil: [Inventive oil 15] has a saturated fatty acid as the unsaturated fatty acid of the mixed monoester used in [Inventive oil 12], and has an iodine value almost equal to that of beef tallow. An example is shown in which 84% of the mixed monoester with a concentration of 40% was used. This oil has an extremely excellent lubricity rating of A, and a rating of C for annealing property, making it an excellent high-speed mill clean rolling oil.

Example of improving annealing property by increasing the amount of antioxidant: [Inventive oil 16] shows an example in which the amount of mixed monoester used in [Inventive oil 15] was increased to 81.5%, and the amount of antioxidant was increased by 2.5%. The annealing property was B, indicating that the annealing property can be improved by selecting an appropriate antioxidant in the present invention as well. [Invention 16] can be said to be an excellent high-speed mill clean rolling oil.

From the above, it can be seen that the rolling oil according to the present invention has excellent both lubricity and annealing property, and is a pressure 1 g oil that fully satisfies various requirements as a high-speed mill clean rolling oil.

Therefore, the rolling oil of the present invention not only speeds up the rolling process but also makes it possible to omit the degreasing process before annealing, and has great effects on improving rolling efficiency, reducing manufacturing costs, and saving energy, making a great contribution to this industry. It is something that does.

[Brief explanation of drawings]

FIG. 1 is a graph showing the lubricity and annealing property of a comparative example; FIGS. 2 and 3 are similar graphs of the inventive example; FIG. 4 is a similar graph of the comparative example; and FIG. is a similar graph of the invention example. Applicant's representative Patent attorney Akira Hirose -Ac3 Base 1 Figure Qin 2nd time

Claims (1)

[Claims] A mixed monoester with a carbon number of y consisting of a fatty acid with a carbon number of Select one or two or more monoesters from the CB) group that satisfy the following, or (B)
Select two or more monoesters from the group, mix them,
An individual cold rolling oil containing a mixed monoester having a total iodine value of 100 or less.