JPH069983A - Lubricating rustproofing composition excellent in adhesiveness to oily surface - Google Patents

Abstract

PURPOSE:To obtain a lubricating rustproofing oil which is excellent in press workability and rustprofness and can adhere to an oily surface of a treated steel sheet without removal of the treating oil therefrom. CONSTITUTION:The composition contains a base oil, an overbased sulfonate having a particle diameter of 0.1mum or smaller and an amine or amide, and has an amine value of 0.2-20mg KOH/g and a viscosity at 40 deg.C of 2-200cSt.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating rust preventive composition having excellent oil surface adhesion.

[0002]

2. Description of the Related Art An oil film forming type rust preventive and press oil is known in which a hydrocarbon lubricating oil such as mineral oil is mixed with a rust preventive such as petroleum sulfonate. This type of oil agent generally gives relatively good results in oil surface adhesion after press working, but has a problem in press workability of a thick-coated galvanized steel sheet.

An oil film-forming rust-preventing / pressing oil has also been proposed in which a hydrocarbon-based lubricating oil such as a mineral oil is mixed with a lubricating / rust-preventing agent such as a superbasic sulfonate. The oil agents of this system are excellent in press workability of various thick-coated galvanized steel sheets, but the oil surface adhesion in the adhesion process after the press work and the degreasing property in the degreasing process were insufficient.

In addition, there is a wax-type lubrication anticorrosive film forming type or a dry film type lubrication anticorrosion film forming type oil for both rust prevention and pressing, which is excellent in press workability of various thick-coated galvanized steel sheets. The oil surface adhesiveness in the adhesion process after press working and the degreasing property in the degreasing process were insufficient. Further, these types of rust preventive / press oil also have problems such as the need for a dedicated coating device and the difficulty of uniform coating.

[0005]

DISCLOSURE OF THE INVENTION The present invention has excellent press workability, exhibits rust preventive property itself, and should be satisfied even if the oil surface is directly adhered or spot welded without degreasing the lubricating oil. The purpose is to obtain a lubricating anticorrosive oil composition exhibiting bondability.

[0006]

The present invention provides (1) base oil, (2)
Super basic sulfonate having a particle size of 0.1 μm or less and (3)
Contains an amine or amide and has an amine value of 0.2 to 20
It relates to a lubricating anticorrosive composition having a viscosity of 2 to 200 cst at 40 ° C. in mgKOH / g.

As the base oil used in the present invention, those conventionally used for press working oils and lubricating oils may be appropriately used, but mineral oils, α-olefins, synthetic naphthenes, synthetic esters and the like are preferable. As an example of the synthetic naphthene, one having a molecular weight of 130 to 250 is preferable. Examples of synthetic esters include polyol esters such as fatty acid trimethylolpropane ester, fatty acid pentaerythritol ester, fatty acid glyceride, diesters such as dioctyl sebacate, monoesters such as oleyl laurate, and the like.

The superbasic sulfonates used in the present invention are petroleum-based or synthetic sulfonates obtained from natural petroleum fractions that have recently begun to be used in press working oils and the like, and these are alkali metal salts and alkaline earth salts. Those containing a metal salt, particularly a calcium salt, are preferable. Particle size is less than 0.1 μm, especially 0.05-0.01 μm
Those of m are preferred. The superbasic sulfonate is not dissolved in the base oil and is present in the base oil in a finely dispersed state.

The amount of the super-basic sulfonate compounded in the composition is 3 to 40% by weight, especially 1% by weight based on the total amount of the lubricating anticorrosive composition.
0 to 20% by weight is preferred. These superbasic sulfonates function as rollers in the base oil, not only contributing to the improvement of lubricity, but also functioning as a rust preventive agent.

The amines used in the present invention include di-octylamine, n-butyl-1-butanamine, n
Secondary amine such as -propyl-1-propanamine, n
Tertiary amines such as -n-dibutyl-1-butanamine, trioctylamine, tri-2-ethylhexylamine, n
Polyamines such as-(3-aminoisopropyl) 1,3-propanediamine, diethylenetriamine and tetraethylenepentamine are preferable, and polyalkylamides are preferable as the amide.

The above amines act as a cross-linking agent for the adhesive in the adhesion process. Without blending amines or amides in the lubricating anticorrosive composition of the present invention, simply blend the corresponding amines or amides into the adhesive in the bonding step, or pre-coat the treated steel sheets and bond them. Can not achieve sufficient adhesive strength. Although the reason is not always clear, the ultrabasic sulfonate particles are present on the adhesive surface, which inhibits the adhesiveness. In the adhesion step after forming, the oil film of the lubricating and anticorrosive composition of the present invention remaining on the surface of the steel sheet is covered with the adhesive film. At this time,
It is considered that the component of claim 4 in the lubricating anticorrosive composition of the present invention and the adhesive film component in the adhesive enhance and accelerate the crosslinking effect by the heat treatment for curing. It should be noted that it is not possible to add amines or amides to the adhesive in advance because the product stability of the adhesive decreases.

The amount of the amines or amides is such that the amine value of the lubricating anticorrosive composition is 0.2 to 20 mgKOH / g, more preferably 0.5 to 10 mgKOH / g. The amount of amine or amide is 0.2 mgKOH / g in amine value
If it is less, the required adhesive strength cannot be obtained. 2 on the contrary
If it is more than 0 mgKOH / g, the stability of the product is deteriorated.

The lubricating anticorrosive composition of the present invention further has an oily agent such as alkyl alcohol, oils and fats, alkyl amides, waxes and fatty acids, sulfur compounds, phosphorus compounds, thiophosphates and organometallic compounds for the purpose of improving lubricity. Extreme pressure additives such as A rust preventive agent such as an alkali or alkaline earth metal salt of a fatty acid or an alkyl sulfonate may be contained for the purpose of improving the rust preventive property. Further, as a regulator, a corrosion inhibitor, a stabilizer, etc. may be contained.

The lubricating rust preventive oil of the present invention has a viscosity at 40 ° C. of 2 to 200 cst, more preferably 10 to 20 cst.
If it is less than 2 cst, excellent lubricity cannot be obtained, and the work environment is deteriorated due to volatilization of the oil agent. 200cs
If it is larger than t, the degreasing property becomes insufficient in the degreasing process.

The lubricating oil anticorrosive composition of the present invention is used for various steel sheets, for example, various galvanized steel sheets, cold-rolled / hot-rolled steel sheets, stainless steel, aluminum sheets and the like for press working and deep drawing. As for the method of use, the composition undiluted solution is electrostatically applied or sprayed on the steel plate or aluminum plate to give 0.5 to 5 g, and more preferably 1 to 3 g per m ² . After pressing or deep drawing, the product is stored with the oil film attached. Since the oil film itself has excellent rust prevention properties, it is possible to prevent rust on processed products. Hereinafter, the present invention will be described with reference to examples.

[0016]

Example 1 Lubricating and anticorrosive compositions I to IV having the formulations shown in Table 1
Was prepared.

[Table 1]

Similarly, Table 2 shows the formulations of conventional representative lubricating oils A, B and C.

[Table 2]

Each lubricating composition was evaluated for lubricity, adhesiveness, rustproofing property and degreasing property. i) Farex test Test method: According to ASTM-3233-A Test evaluation: Measurement of pressure resistance load ii) Bowden test Test method: Measurement of friction coefficient As shown in FIG. 1, the heater (1) is adjusted to a constant temperature. A certain amount of oil to be tested is applied on the prepared steel plate (2), and then the ball (3) is slid under the following conditions while applying a constant load,
The 20th value was measured. Test condition: Test piece Ball: SUJ-2 (15/64 ") Steel plate: GA (60/60) Sliding speed: 200mm / min Sliding distance: 100mm Sliding frequency: 20 Load: 500g Test temperature: 50 ° C Oil coating Amount: 2g / m ²

Iii) T-type peel test Test method: Two L-shaped test pieces with a width of 25 mm shown in FIG.
2 pieces of test oil on a steel plate (long: 150 mm, short: 50 mm)
g / m ^{2 After} applying oil, the film pressure is 0.1 m on the long end 10 mm.
m epoxy adhesive is applied. After the steel plates are packed, they are cured at a predetermined temperature. The test piece is peeled off using an Instron in the direction of the arrow in FIG. 2 and the peel adhesion strength is measured. Test conditions: Test adhesive: PVC / epoxy type adhesive Test steel plate: GA (60/60) 25 × 200 Peeling speed: 200 mm / min Curing: 160 ° C. × 15 min Evaluation: Peeling adhesive strength was measured, The ranking was performed as follows. ◎: Pass ○: Conditional pass ×: Fail

Iv) Shear test Test method: After applying a test oil of 2 g / m ² on a steel plate (100 mm × 25 mm × 1.0 mm), as shown in FIG. 3, a Teflon spacer (25 mm × 1.0 mm ×) 1.0mm) 25mm interval is provided and the epoxy adhesive film pressure is 1mm between them.
To be applied. After the steel plates are packed, they are cured at a predetermined temperature. Shear bond strength is measured using an Instron as indicated by the arrow. Test conditions: Test adhesive: PVC / epoxy adhesive test steel plate: GA (60/60) 25 × 120 Peeling speed: 50 mm / min Curing: 160 ° C. × 15 min Evaluation: Shear bond strength was measured, The ranking was performed as follows. ◎: Pass ○: Conditional pass ×: Fail

V) Wet test Test method: According to JIS-K-2246 Test evaluation: The area without rust after 30 days was evaluated, and the area ratio without rust was ranked as follows. ◎: 100% ○: 80% ≤ ~ <100% △: 50% ≤ ~ <80% ×: 0% ≤ ~ <50%

Vi) Salt spray test Test method: According to JIS-K-2246 Test evaluation: The area without rust after 24 hours was evaluated, and the area ratio without rust was ranked as follows. ◎: 100% ○: 80% ≤ ~ <100% △: 50% ≤ ~ <80% ×: 0% ≤ ~ <50%

Vii) Degreasing test Test method: Evaluation of degreasing property by dipping method Test condition: Steel sheet: GA (60/60) 60 × 80 Degreasing agent: Sodium silicate type degreasing agent Degreasing condition: Concentration: 20 g / L Temperature : 40 ° C. test evaluation: ranked by the water wetting method as follows. ⊚: 100% ○: 80% ≦ to <100% Δ: 50% ≦ to <80% ×: 0% ≦ to <50% The results are shown in Table 3.

[0024]

[Table 3]

[0025]

The lubricating anticorrosive composition of the present invention provides excellent press workability, and the processed product thus obtained can be stored without adding a special antirust oil. Furthermore, this processed product can be oil-surface bonded in that state without a degreasing step, and degreasing before the bonding step is unnecessary. Since the composition of the present invention is excellent in press workability, it enables press work and deep drawing of thick-coated galvanized steel plate, special steel plate, high strength steel plate, aluminum alloy material and the like.

[Brief description of drawings]

FIG. 1 is a diagram showing an outline of a lubricity evaluation method by a Bowden test.

FIG. 2 is a diagram showing an outline of a T-type peel test method.

FIG. 3 is a diagram showing an outline of a shear test method.

[Simple explanation of symbols]

 (1) Heater (2) Steel plate (3) Ball (4) 1.0 (t) Teflon spacer

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location C10M 133: 56) C10N 10:02 10:04 20:00 Z 8217-4H 20:02 20:06 Z 8217-4H 30:00 A 8217-4H 30:06 30:12 40:24 Z 8217-4H (72) Inventor Yuzo Kawakami 2-3-1 Shibukawa-cho, Yao-shi, Osaka Japan Quaker Chemical Co., Ltd.

Claims (6)

[Claims] 1. A base oil containing (1) a base oil, (2) a superbasic sulfonate having a particle size of 0.1 μm or less and (3) an amine or an amide, and having an amine value of 0.2 to 20 mg KOH / g at 40 ° C. A lubricating anticorrosive composition having a viscosity of 2 to 200 cst. 2. The lubricating rust preventive composition according to claim 1, wherein the base oil is selected from mineral oil, α-olefin, synthetic naphthene and synthetic ester. 3. The lubricating anticorrosive composition according to claim 1, wherein the superbasic sulfonate contains an alkali or alkaline earth metal salt. 4. The amine is a secondary amine, a tertiary amine,
The lubricating anticorrosive composition according to claim 1, which is selected from polyamines and polyamides. 5. The lubricating rust preventive composition according to claim 1, which has an amine value of 0.5 to 10 mgKOH / g. 6. The lubricating rust preventive composition according to claim 1, which has a viscosity of 10 to 20 cst.