JPH1192776A - Rust-preventive oil composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a rust-preventive oil compsn. which forms a rust-preventive film exhibiting a self-restoring capability when damaged and does not precipitate additives contained in a water-soluble process oil, etc., by compounding a mineral oil and/or a synthetic oil as the base oil with specified amts. of a lanolin fatty acid deriv. and a vegetable oil or fat. SOLUTION: A mineral oil having a viscosity at 40 deg.C of 1-50 mm<2> /s and an arom. content of 20% or lower and/or a synthetic oil having a viscosity at 40 deg.C of 1-50 mm<2> /s, as the base oil, is compounded with, based on the resulting compsn., 1-30 wt.% lanolin fatty acid deriv. having a total acid value of 3-25 mgKOH/g and prepd. by converting at least a part of the fatty acids in lanolin into salts of an alkaline earth metal and/or an alkali metal and 1-30 wt.% vegetable oil having an iodine value of 100 or higher. If necessary, up to 10 wt.% other rust preventives, 0.01-1 wt.% antioxidant, 1-1,000 ppm corrosion preventive, etc., may be added to the resulting compsn.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rust preventive oil composition, and more particularly, has a self-healing ability even when a rust preventive coating is damaged, and forms a precipitate when mixed with a water-soluble processing oil. No rust prevention oil composition.

[0002]

2. Description of the Related Art Generally, in metal working, rust-preventive oil forms an adsorbing film on a metal-worked surface to prevent water or oxygen from coming into contact with a metal. Scratches can form and rust can form from the scratches. In order to self-repair such scratches and exhibit a rust-preventive effect, a rust-preventive oil composition having a somewhat long drying time is required. On the other hand, if the drying time is too long, inconvenience occurs in handling, so There has been a demand for a rust-preventive oil composition having a long drying time.

A rust preventive oil obtained by mixing a lanolin with a mineral oil has been known (Japanese Patent Application Laid-Open No. 62-292891).
No.), processing using a water-soluble processing oil, and then applying a rust-preventive oil, the water-soluble processing oil is mixed into the rust-preventive oil,
There is a problem that the additive component contained in the water-soluble processing oil reacts with the rust-preventive oil to form a precipitate.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above, and has a so-called self-healing ability that covers a damaged portion even if the rust-preventive film is damaged, and a water-soluble processing oil. An object of the present invention is to provide a rust-preventive oil composition which does not generate a precipitate with an additive component contained in the oil.

[0005]

Means for Solving the Problems As a result of intensive studies, the present inventor has found that mineral oil and / or synthetic oil can be used as a base oil.
The inventors have found that the object of the present invention can be achieved by blending a specific amount of a lanolin fatty acid derivative and a specific vegetable oil and fat, and have completed the present invention. That is, the present invention relates to (B) lanolin fatty acid derivatives 1 to 30 based on the total amount of the composition, using (A) a mineral oil and / or a synthetic oil as a base oil.
The present invention provides a rust-preventive oil composition containing 1% to 30% by weight of a vegetable oil or fat (C).

[0006]

Embodiments of the present invention will be described below. The viscosity of the mineral oil (A) used in the present invention at 40 ° C. is preferably 1 to 50 mm ^2.
/ S, more preferably 1 to 30 mm ² /
s, particularly preferably 1 to 10 mm ² / s. If the viscosity is less than 1 mm ² / s, the drying speed may be too high to make handling difficult or to solidify in the tank. On the other hand, if it exceeds 50 mm ² / s, drying may be insufficient and a uniform film may not be formed, and there may be places where rust prevention is insufficient.

Further, the mineral oil (A) used in the present invention preferably has an aromatic content (% CA) of 20%.
% Or less, more preferably 10% or less. If the aromatic content exceeds 20%, environmental problems such as carcinogenicity may occur. The mineral oil (A) used in the present invention includes, for example, paraffin-based crude oil,
An intermediate-base crude oil or a naphthenic crude oil is subjected to atmospheric distillation, or a distillate obtained by distilling the residual oil of atmospheric distillation under reduced pressure, or a refined oil obtained by purifying it according to a conventional method, for example, Solvent refined oil, hydrogenated refined oil, dewaxed oil, clay treated oil and the like can be mentioned, but kerosene fraction is preferably used. The kerosene fraction can be further purified by precision distillation or the like, and particularly preferably has a boiling range of 150 to 240 ° C. at normal pressure.

[0008] The synthetic oil of the component (A) is 40 ° C.
Is preferably in the range of 1 to 50 mm ² / s,
More preferably, it is in the range of 1 to 30 mm ² / s, especially 1 to 30 mm ² / s.
Preferably, it is in the range of 10 mm ² / s. Examples of the synthetic oil used in the present invention include, for example, olefin oligomer, poly α-olefin, α-olefin copolymer, polybutene, alkylbenzene, polyol ester, dibasic acid ester, polyoxyalkylene glycol, polyoxyalkylene glycol ester, and polyoxyalkylene. Examples thereof include alkylene glycol ethers and silicone oils. Among them, propylene oligomers and butene oligomers are preferred.

Each of these base oils can be used alone or in combination of two or more, and mineral oil and synthetic oil may be used in combination. As the lanolin fatty acid derivative of the component (B) used in the present invention, all or a part of the fatty acid component in lanolin obtained by purifying a waxy substance attached to wool hair is converted into a metal salt or ester. Among them, alkaline earth metal salts such as magnesium, calcium and barium, and alkali metal salts such as sodium and potassium are particularly preferable.

The lanolinic acid derivative may have any total acid value, but preferably has a total acid value of 3 to 25 mgKOH / g, more preferably 5 to 20 mgKOH / g. If the total acid value is lower than 3, rust resistance may be poor, and if the total acid value is higher than 25, storage stability and oxidation stability may be poor. The total acid value is based on JIS K
It is a value measured according to 2501.

The content of the lanolin fatty acid derivative of the component (B) used in the present invention is 1 to 100% based on the total amount of the composition.
It is 30% by weight, preferably 1 to 25% by weight, more preferably 5 to 15% by weight. If the amount is less than 1% by weight, a satisfactory rust-preventing effect cannot be obtained. If the amount exceeds 30% by weight, the effect becomes saturated and the rust-preventing effect commensurate with the content cannot be obtained, which is not preferable. .

The vegetable oil / fat of the component (C) used in the present invention is not particularly limited, but is preferably a vegetable oil / fat having an iodine value of 100 or more, more preferably 130 or more. Specific examples include linseed oil, eno oil, tung oil, sesame oil, rapeseed oil, cottonseed oil, soybean oil, camellia oil, olive oil, castor oil, and the like. The iodine value is a value measured according to JIS K0070.

The content of the vegetable oil (F) of the component (C) used in the present invention is 1 to 30% by weight based on the total amount of the composition.
Preferably 1 to 25% by weight, more preferably 5 to 15%
% By weight. If the amount is less than 1% by weight, precipitation may occur when a water-soluble processing oil is mixed. If the amount is more than 30% by weight, the effect is saturated and an effect commensurate with the content cannot be obtained. Therefore, it is not preferable.

In the present invention, in addition to the components described above,
Other additives such as a rust inhibitor, an antioxidant, and a corrosion inhibitor can be used in combination within a range that does not impair the characteristics of the present invention. Other rust inhibitors that can be used in combination include alkyl or alkenyl succinic acids and derivatives thereof, sulfonates, polybasic carboxylic esters, partial esters of polyhydric alcohols, phosphoric acid and phosphate esters, oxidized waxes and derivatives thereof. is there. The addition amount of these other rust preventives is optional as long as the characteristics of the present invention are not impaired, but is preferably 10% by weight or less based on the total amount of the composition.

Examples of the antioxidant include phenolic antioxidants such as 2,6-ditert-butylphenol and 2,6-ditert-butylparacresol, and amine antioxidants such as diphenylamine and phenyl-α-naphthylamine. is there. When these antioxidants are used, the content is preferably 0.01 to 1% by weight based on the total amount of the composition. If the content is less than 0.01% by weight, the antioxidant effect cannot be obtained, and if it exceeds 1% by weight, the dissolution becomes difficult.

Examples of the corrosion inhibitor include benzotriazole and derivatives thereof, thiadiazole and derivatives thereof. When these corrosion inhibitors are used, the amount is preferably from 1 to 1000 ppm by weight, more preferably from 10 to 100 ppm by weight, based on the total amount of the composition. If the amount is less than 1 ppm, the effect of preventing corrosion cannot be obtained, and if it exceeds 1000 ppm by weight, dissolution becomes difficult.

[0017]

EXAMPLES Next, the present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples. Using the composition having the properties shown in Table 1,
Each of them was tested and evaluated by the following method. (1) Wetting test: 24 in accordance with JIS K 2246
The degree of rust generation after leaving for 0 hours was evaluated. (2) Drying time to the touch: JIS coated with anti-rust oil composition
K 2246 at room temperature (23
C), and the center of the coated surface was lightly touched with a fingertip, and the time during which the fingertip was not stained with the sample was measured. (3) Mixing test of water-soluble processing oil: A commercially available water-soluble processing oil (Daphne Alpha Cool WX manufactured by Idemitsu Kosan Co., Ltd.) was diluted 25-fold with water, and the diluted solution and the rust-preventive oil composition were mixed in 1 part. : 1 and left at room temperature (23 ° C) for 24 hours, and the appearance of these rust preventive oil compositions was observed. Table 2 shows these results.

[0018]

[Table 1]

[0019]

[Table 2]

[0020]

According to the present invention, the rust preventive coating is damaged,
Even if the cured film of the surface layer is damaged, the oil having fluidity inside the film re-forms the cured film, which has a so-called self-healing ability,
In addition, it is possible to provide a rust-preventive oil composition that does not generate a precipitate even when a water-soluble processing oil is mixed.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI C10N 40:20

Claims (3)

[Claims] 1. A blend of (A) 1-30% by weight of a lanolin fatty acid derivative and (C) 1-30% by weight of a vegetable oil based on the total amount of a composition, using (A) a mineral oil and / or a synthetic oil as a base oil. A rust preventive oil composition comprising: 2. The rust preventive oil composition according to claim 1, wherein the lanolin fatty acid derivative is an alkaline earth metal salt and / or an alkali metal salt. 3. The rust preventive oil composition according to claim 1, wherein the vegetable oil has an iodine value of 100 or more.