JPH107935A - Cement-base ceramic coating material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a cement-base ceramic coating material which gives a coating film excellent in substrate protection and dryability by compounding a cement-base ceramic coating material with a specific metal powder. SOLUTION: A cement-base ceramic coating material, such as one comprising a binder resin (e.g. a chlorinated rubber), cement (e.g. white cement), a pigment, a vehicle, a solvent, etc., is compounded with a zinc powder pref. having a particle size of 2-8μm, still pref. 3-5μm, pref. in an amt. of 1-700 pts.wt. still pref. 5-500 pts.wt., based on 100 pts.wt. other nonvolatile components. The zinc powder effectively accelerates the oxidative polymn. of a strongly alkaline cement-base fine ceramic powder while using oxygen and water as media, thus enabling the short-time curing of the coating film.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cement-based ceramic paint which forms a coating film having excellent drying and protective properties.

[0002]

2. Description of the Related Art Cement-based ceramic paints have protective properties,
In particular, it is used mainly for corrosion and rust prevention because it forms a coating film that is excellent in terms of salt water resistance, water resistance, weather resistance, etc. Has a limited field of use. That is, in conventional cement-based ceramic paints, the binder resin prevents effective contact between the cement-based ceramics and oxygen, moisture, etc., so that the curing reaction is remarkably delayed, and the pores of the porous cement-based ceramics are reduced. It takes a long time to dry and cure the coating film because the invading solvent is not volatilized efficiently, and there is a problem that the working efficiency from the viewpoint of stacking and overcoating or overcoating of the coated product is significantly reduced,
There is a need in the art for a solution to this problem.

[0003]

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances in the art, the present invention relates to a cement which can impart excellent drying properties to a cement-based ceramic coating film without impairing the excellent protection of the coating. It was made to provide a ceramic paint.

[0004]

That is, the present invention relates to a cement ceramic paint containing zinc powder.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Cement-based ceramic paints according to the present invention are commercially available cement-based ceramic paints (for example, "Savies M" manufactured by Daiyu Paint Co., Ltd., "Kanaesa Beads R" manufactured by Kanae Paint Co., Ltd., "Perfect Guard 55" manufactured by Daimwakai Co., Ltd.). , "Fine Sabbie SR" and "Sabbie A" manufactured by Toa Paint Co., Ltd.) may be prepared by appropriately blending zinc powder, but generally, it may be prepared according to the following formulation.

Examples of the binder resin to be added to the coating composition of the present invention include alkyd resins, polyester resins, polyether resins, vinyl resins, acrylic resins, rubber resins and the like. The amount of the binder resin
Usually, it is 0.01 to 70% by weight, preferably 10 to 50% by weight.

[0007] Cement to be incorporated into the paint according to the present invention includes ordinary Portland cement, early-strength Portland cement, ultra-high-strength Portland cement, moderate heat Portland cement, special Portland cement (eg, low heat cement, sulfate resistant cement, white cement) And blast furnace cement, silica cement,
Examples thereof include fly ash cement, expanded cement, rapid-hardening cement, acid-resistant cement, alumina cement, and ultra-fast-hardening cement. Particularly preferred are white cement and blast furnace cement. The amount of cement is usually 1 to 60% by weight, preferably 10 to 50% by weight.

The pigments to be incorporated into the coating composition of the present invention include various color pigments, for example, white pigments (titanium white, zinc white, lithobon lead white, etc.), black pigments (carbon black, iron black, graphite, etc.), red Pigment (Cadmium Red, Bengal, Toluidine Red, etc.), Yellow Pigment (Graphite, Iron Yellow, Titanium Yellow, Anthraquinone Yellow, etc.), Green Pigment (Chromium Oxide,
Phthalocyanine green) and blue pigments (dark blue, ultramarine,
In addition to phthalocyanine blue, etc., metal powder pigments (aluminum powder, bronze powder, etc.), extender pigments (chalk, barite powder, talc, etc.), matting pigments and the like are exemplified. Although the amount of the pigment is not particularly limited, it is usually 2 to 60% by weight,
Preferably it is 3 to 50% by weight.

The solvent for the vehicle of the paint according to the present invention includes hydrocarbons (mineral spirit, kerosene, toluene,
Xylene, etc.), alcohols (ethyl alcohol, butyl alcohol, isopropyl alcohol, etc.), esters (ethyl acetate, butyl acetate, etc.), ketones (acetone, methyl ethyl ketone, methyl isobutyl ketone, etc.), ethers (ethylene glycol monoethyl ether, etc.) and these Although an arbitrary mixed solvent of the like is exemplified, particularly preferred are:
Examples thereof include aromatic hydrocarbons, ketones, alcohols, and any mixed solvents thereof.

A feature of the present invention resides in that zinc powder is further added to a cement-based ceramic paint containing the above components. The particle size of the zinc powder is usually 2 to 8 μm, preferably 3 to 5 μm. If the particle size is excessively large, the contact area with the cement-based ceramic is too small and the reaction between the two does not proceed sufficiently. If the particle size is too small, the reaction between the two becomes too fast and the workability deteriorates. The amount of the zinc powder is dependent on the type and amount of the other components, and is not particularly limited, but is usually 1 to 700 parts by weight, preferably 100 parts by weight, based on the other nonvolatile components in the paint. When the amount is less than 1 part by weight, the intended purpose of the present invention cannot be achieved. When the amount is more than 700 parts by weight, uniform mixing with the resin becomes difficult. , Cracks occur, and the adhesion to the substrate is reduced.

The reason why the coating film formed from the cement-based ceramic paint according to the present invention exhibits excellent drying properties is as follows.
Although the theoretical investigation has not been made, it is considered as follows. That is, it is considered that the zinc powder effectively promotes the oxidative polymerization reaction of the strongly alkaline cement-based ceramic fine powder using oxygen and moisture as a medium, whereby the coating film is cured in a short time.

In addition to the above-mentioned components, conventional additives such as pigment dispersants (bentonite, montmorillonite, amide wax, etc.), desiccants (metal salts of naphthalic acid or octylic acid, etc.), anti-skinning An agent (hydroxyamine, MEK oxime, etc.) may be appropriately compounded.

[0013]

The present invention will be described below with reference to examples. Examples 1 to 3 700 g of commercially available cement-based ceramic paint "Savies M" (manufactured by DU Paint Co., Ltd.) having the following composition, 700 g of "Kanaesabeads R" (manufactured by Kanae Paint Co., Ltd.), and 700 g of "Perfect Guard 55" (Dimwakai Co., Ltd.) Zinc powder (Zinc powder “UF” (particle size: 2-3 μm) manufactured by Shirasu Chemical Co., Ltd.) in 700 g
The cement-based ceramic paints 1 to 3 according to the present invention were prepared by uniformly mixing 0 g each. 1) "Sabizu M" (nonvolatile content: 66%) Ingredient Amount (wt%) Pigment 19.0 cementitious ceramics 21.0 chlorinated rubber resin 20.0 plasticizer 3.0 solid aid 3.0 solvent 34.0 2) "Kanaesabizu R" (nonvolatile content: 66%) Ingredient amount (wt%) pigment 19.0 cementitious ceramics 24.0 chlorinated rubber resin 19.0 plasticizer 3.0 solid additive 1 3.0 Solvent 34.0 3) Perfect Guard 55 "(Nonvolatile content: 55%) Component blending amount (% by weight) Pigment 19.0 Cement-based ceramics 24.0 Chloride rubber-based resin 19.0 Plasticizer 3.0 Solid Additive 1.0 Solvent 34.0

The above cement-based ceramic paints 1 to 3
Was diluted using 100 ml of chlorinated rubber thinner (manufactured by Kanae Paint Co., Ltd.), and then applied to a clean iron plate (film thickness: 40 to 60).
μ), examining the temporal change in the hardness of the coating film at 20 ° C.
Table 1 shows the results.

[Table 1]

Comparative Examples 1 to 3 700 g of commercially available cement-based ceramic paints "Savies M" and "Kanaesa Beads R" 7 used in Examples 1 to 3
After diluting 00 g and 700 g of "Perfect Guard 55" with 100 ml of chloride rubber thinner, respectively, the solution was applied to a clean iron plate (film thickness: 40 to 60 μm), and the hardness of the coating film was 2
The change with time at 0 ° C. was examined, and the results are shown in Table 1 above.

Example 4 Zinc powder was added to a commercially available cement-based ceramic paint "Concoat VP" (manufactured by DAI PAINT Co.) having the following composition:
(Particle size: 3 to 5 μm) Using coating material 4 containing 20% (weight ratio to the nonvolatile content of the coating material), formed according to the procedures of Examples 1 to 3, and after 240 hours, (Dry film thickness: 45 μ) was subjected to a grid test (peeling resistance test against peeling of an adhesive tape for 1 mm ² × 100 grids) and a salt spray test (JIS-Z-2371 and JIS
-K-5400 7.8), water resistance test (JIS-K-5)
400 7.2) and impact resistance test [JIS-K-54]
00, 6, 13B method (DuPont method)]. 4) "Con Coat VP" (non-volatile content: 64%) Component content (% by weight) Pigment 23.0 Vinyl-based resin 15.3 Cement-based ceramics 23.0 Plasticizer 1.5 Solid additive 1.2 Solvent 36.0 The results are shown in Table 2 below.

[Table 2] Table 1 shows the time-dependent change at 20 ° C. of the hardness of the coating film obtained from the coating material 4 in accordance with the procedures of Examples 1 to 3.

Comparative Example 4 A coating film formed in the same manner as in Example 4 using "CON COAT VP" was subjected to a grid test, a salt spray test, a water resistance test and an impact resistance test. The results are shown in Table 2 above.
In addition, according to the procedure of Examples 1 to 3, "CON COAT V
Table 1 shows the change over time in the hardness of the coating film obtained from “P” at 20 ° C.

[0018]

According to the present invention, the drying time of the cement-based ceramic coating film can be greatly reduced without impairing the excellent protection property of the coating film. Not only efficiency is greatly improved, but also bleed during overcoating (bleeding of undercoat paint color)
And the lifting of the undercoat film at the time of overcoating are effectively prevented. Therefore, according to the present invention, the field of use of the cement-based ceramic paint, whose use has been limited for its advantages, can be greatly expanded.

Claims (3)

[Claims] 1. A cement-based ceramic paint containing zinc powder. 2. The paint according to claim 1, wherein the zinc powder is contained in an amount of 1 to 700 parts by weight based on 100 parts by weight of the other nonvolatile components. 3. The paint according to claim 1, wherein the particle size of the zinc powder is 2 to 8 μm.