JPH0192267A - Rust preventive wax - Google Patents

Abstract

PURPOSE:To obtain a rust preventive wax, consisting of an oil-modified alkyd resin and/or resin-modified alkyd resin and basic calcium alkylbenzenesulfonate with thixotropic properties and having excellent moisture, kerosene and water resistance. CONSTITUTION:A rust preventive wax obtained by blending (A) (A1) an oil- modified alkyl resin modified with a vegetable linseed oil, soybean oil, safflower oil, dehydrated castor oil or fatty acids constituting the oils and/or (A2) resin- modified alkyl resin modified with a phenolic, styrene, acrylic or urethane resin with (B) a calcium alkylbenzenesulfonate expressed by the formula (R is 12-30C alkyl; X is 20-40) at a weight ratio within the range of 1:4-1:10 and adding a solvent (mineral spirit), rust inhibitor (barium sulfonate), etc., as optional components.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a wax-type rust preventive agent that is applied to the bag structure of a vehicle body.

(Prior art) When a completed car is shipped, wax-type wax, in which wax and anti-corrosion additives are dissolved or dispersed in a solvent such as mineral spirits, is applied to the bag structure, plate joints, hinges, etc. of the car body. In addition to applying a rust preventive agent, a surface protectant (protective wax) is applied to the painted surface of the body to prevent scratches during transportation.
The paint surface protectant is later removed using steam kerosene.

(Problems to be Solved by the Invention) The above-mentioned conventional rust preventive agents have the problem that they are easily dissolved and washed away by steam kerosene, resulting in a decrease in rust preventive properties.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides an oil-modified alkyd resin using linseed oil or the like or a resin-modified alkyd resin using phenol resin, etc., using a basic alkylbenzene sulfonic acid having thixotropic properties. It was added to calcium salts.

(Function) By adding oil-modified alkyd resin or resin-modified alkyd resin to calcium salt of alkylbenzenesulfonic acid having thixotropic properties, the anti-temperature kerosene water resistance (humidity resistance, kerosene resistance and water resistance) of the rust inhibitor is improved. do.

(Example) Embodiments of the present invention will be described below based on the accompanying drawings.

First, the components constituting the rust preventive agent according to the present invention are divided into essential components and optional components. It consists of a calcium salt of a basic alkylbenzenesulfonic acid.

(a) Oil-modified alkyd resin modified with vegetable linseed oil, soybean oil, safflower oil, dehydrated castor oil or fatty acids (linoleic acid, etc.) that constitute these oils (b) Phenolic resin, styrene oil, A blending ratio of a resin-modified alkyd resin modified with an acrylic resin or urethane resin, a polymer compound shown in group (a) or group (b) above, and a calcium salt of basic alkylbenzenesulfonic acid having thixotropic properties ( Weight ratio) is 1:4
~1:10. The reason why the blending ratio of the calcium salt of alkylbenzene sulfonic acid to the oil-modified alkyd resin or resin-modified alkyd resin is set in the above range is that if it is less than 4 times, the thixotropy will be small, and even if a rust preventive agent is applied, the anti-sagging property will be low. Poor, it was not possible to obtain a rust preventive film with a uniform thickness, and the
If the ratio exceeds twice that, the permeability to gaps such as the board joints will decrease.

On the other hand, optional components include mineral spirit as a solvent, barium salt of sulfonic acid and methyl ester of oxidized wax as rust preventive agents, microcrystal wax as a viscosity modifier for penetration and anti-sagging, cobalt naphthenate and naphthenic acid as hardening agents. Add lead, etc.

Next, a specific manufacturing method will be explained.

Add the entire amount (gHffi) of calcium salt of alkylbenzenesulfonic acid having thixotropic properties to tank A, add 1/3 (g) of the total amount of a solvent such as mineral spirit, and stir well. After heating to .degree. C., the total amount (g) of the oil-modified alkyd resin (2) was added, stirred well, and kept at 40.degree.

All i (g) of microcrystalline wax, barium salt of dinonylnaphthalene sulfonic acid, and methyl ester of oxidized wax were heated and melted in tank B at 80°C.
Pour the entire amount of solvent such as mineral spirits into it!
/3 (g), stir well and keep warm at 80°C.

Next, pour the entire amount of the intermediate product from tank B into tank A, and then add the remaining 1/3 of the solvent such as mineral spirit.
Stir well and keep warm at 40°C. Finally, add cobalt naphthenate and lead naphthenate and stir well to complete the rust-preventing wax.

When the car body rust preventive agent of the present invention is applied to a car body, it is applied at room temperature or at a temperature in the range from room temperature to 90°C by spraying or brushing.

(Effects of the Invention) [Table] shows Examples (1) and (2) of the present invention and Comparative Example (1).

This figure shows the results of testing the composition (2) using the test method shown below.

(1) Test specimen preparation JIS G31412M plate (150x 7Qx 0.8
m/m) Examples (1), (2) and Comparative Example (1)
, Apply a dry 100 μm spray coat to the sample in (2) and leave it indoors for 7 days. Next, this sample piece was heated to 60℃ for 2 hours.
It was dried for an hour, cooled to room temperature, and used as a test specimen.

(2) Humid kerosene water resistance test As shown in the diagram, 98 parts of water, 2 parts of white kerosene, 0 surfactant
．． GRA ( :A #439 fan-shaped pattern tip 5 manufactured by O was used to spray, and the peeled area was measured after 3 and 6 minutes.The kerosene water was circulated (1.5 J2/min).

As is clear from the table, the state of the rust-preventing wax film on the sample piece after 3 minutes of aging is that of Example (1).

In contrast to (2), the film did not peel off, whereas the film in Comparative Example (1) slightly peeled off and ran off, and in Comparative Example (2), the entire surface of the film peeled off and ran off. After another 6 minutes, Example (1)
, (2), the film slightly peeled off and leaked out. On the other hand, in Comparative Example (1), the entire surface of the film peeled off and ran out. As described above, the rust-preventing wax of the present invention has extremely high resistance to wet kerosene and water, and a sufficient rust-preventing effect can be continuously obtained even when applied to the bag structure, plate joints, and hinges of a car body.

[Brief explanation of the drawing]

The drawing shows the test results for hot water, kerosene, and water resistance. In addition, in the drawing, 1 is warm kerosene water, 2 is a warmer, 3 is a pump,
4 is a test piece. Patent applicant: Honda Motor Co., Ltd.
Parker Kosan Co., Ltd. Agent Patent Attorney 2) Part 1)
Patent Attorney Kuni Ohashi Patent Attorney
Yuki Koyama Patent Attorney Field 1
) Shigeru 7.7゜2 Figure 1

Claims (3)

[Claims] (1) The oil-modified alkyd resin is composed of at least one polymer compound of an oil-modified alkyd resin and a resin-modified alkyd resin, and a calcium salt of basic alkylbenzenesulfonic acid having thixotropic properties, and the oil-modified alkyd resin is vegetable linseed oil, Modified with soybean oil, safflower oil, dehydrated castor oil, or fatty acids constituting these oils, and the resin-modified alkyd resin is modified with a phenol resin, styrene resin, acrylic resin, or urethane resin. Anti-rust wax. (2) The antirust wax according to claim 1, wherein the calcium salt of basic alkylbenzenesulfonic acid having thixotropic properties is represented by the following general formula. ▲There are mathematical formulas, chemical formulas, tables, etc.▼ R: Alkyl group consisting of 12 to 30 carbon atoms C_nH_2_n_+_1 X: 20 to 40 (3) Blending ratio of the above-mentioned polymer compound and calcium salt of basic alkylbenzenesulfonic acid having thixotropic properties (
The antirust wax according to claim 1, wherein the anticorrosion wax has a weight ratio of 1:4 to 1:10.