JPH038476A - Temporary camouflaging method for dazzle painted moving equipment and material - Google Patents

Abstract

PURPOSE:To effectively remove camouflage coated films with a simple treatment by painting dazzle painted moving equipment and materials with a compsn. contg. dazzle paint in a resin vehicle having a large acid value, then cleaning the same with an alkaline soln. when the need for camouflage is eliminated. CONSTITUTION:The dazzle painted moving equipment and materials are painted with the paint resin prepd. by using the acrylic resin having the large acid value of resin, i.e., 30 to 300, more preferably 100 to 200 acid value and mixing colored paints for camouflage therewith. The coated film is thereafter cleaned with the alkaline soln. of >=9pH and is rinsed when the need for the camouflage is eliminated. The easy painting on the dazzle painted moving equipment and materials is possible in this way; in addition, the control of vignette painting and film thickness and toning are free and the effective removal is executable with the simple treatment at the time of removing the coated film.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a method of temporarily disguising mobile camouflage equipment (eg, tanks, vehicles, etc.) used in the defense industry by painting them.

Conventional Technology Tanks, vehicles, and other so-called mobile equipment used in the Defense Class 1 system are usually camouflaged, and it is required to change the camouflage pattern and color at any time depending on the location and season. When changing the camouflage of such equipment or - temporary camouflage, the following methods are recommended: (1) Repainting with regular paint (for winter camouflage on tanks such as 21, dissolve lime in water and apply it, then scrape it off when unnecessary) Method (3) Covering with a sheet or cloth and peeling it off when unnecessary A method of applying strippable paint and peeling it off when unnecessary is used.

However, when method (1) is used, the ff1M thickness increases with each recoating, and the adhesion strength at each interface decreases, so there is a limit to the number of recoats, and if the number of recoats is exceeded, the coating must be removed! 1IlftL, so it cannot be said to be a temporal falsification after all. (Method 21 has problems with the removal work, and painting (painting) is not a simple process, and method (3) naturally falls off or flakes during use, and it takes a long time to remove the paint. There are problems with the work, the workability of fake equipment, and the workability of removal.
There are problems with removal 1v performance and poor cropping. Furthermore, in any of these methods, it is impossible to harden the film, it is impossible to arbitrarily set the film thickness, and the cleaning performance when contaminated is poor.

The problem to be solved by the invention is that it can be easily painted on mobile camouflage equipment, it firmly adheres to the base of the equipment, and the paint film can be removed effectively with a simple process. Blurred paint, etc.
There is a need for an effective temporary camouflage method by painting mobile camouflage equipment that allows for free control of film thickness and color adjustment, and it is an object of the present invention to meet such problems. Another object of the present invention is to provide a method for temporary camouflage by painting, which has excellent coating workability at low temperatures in cold regions, etc., and has excellent paint film cleaning properties when contaminated.

Means for Solving the Problems According to the present invention, the above object is to provide mobile camouflage equipment with a coating composition containing an acrylic resin with an acid value of 3U-300 (A fat vehicle as a vehicle and a coloring pigment used in a camouflage coating). A method for temporary camouflage by painting mobile camouflage equipment, which consists of painting the mobile camouflage equipment with water and cleaning the paint film with an alkaline solution with a pH of 9 or higher and washing it with water when the requirements for camouflage are no longer necessary, is easy and effective. It can be achieved.

The present invention has an extremely high resin acid value compared to ordinary paint resins, that is, an acid value of 30 to 300, preferably 100 to 20.
When a coating composition is applied using a No. 0 acrylic resin as a resin vehicle and containing a coloring pigment used in camouflage coatings, the adhesion of the coating film and stain-cleaning properties are good, and the alkali-based This work was completed based on the knowledge that the paint film can be easily and effectively removed by spraying it with water, leaving it for a while, and then washing it with water. The acrylic resin of the resin vehicle used in the present invention can be any acrylic resin as long as the final acid value of the resin is between 30 and 3 Of. For example, such acrylic resins include acidic acrylic resins (e.g., acrylic acid, methacrylic acid, crotonic acid, monomers having a polymerizable double bond and sulfonic acid groups, etc.), and emulsions of ethylenically unsaturated monomers. It can be an acrylic resin emulsion of the acid fi30-31)l) obtained by polymerization. Also containing the above-mentioned acidic acrylic monomer, -Ethylenically unsaturated monomer milk 1
It may be an aqueous acrylic resin solution having an acid value of 30 to 300 obtained by obtaining an emulsion by polymerization and then making it water-soluble with an alkali. Furthermore, the acrylic resin may be an acrylic resin varnish having an acid value of 30 to 300 obtained by solution polymerization of an ethylenically unsaturated monomer containing an acidic acrylic monomer. The final resin acid number of such resin in either form must be in the range of 30-300, preferably 100-200.

The coating composition of the present invention contains a camouflage pigment in the resin vehicle. Any pigment that can be used for temporary camouflage purposes may be selected as appropriate. That is, in the winter season, a white pigment such as titanium white has the same hue and reflectance as snow, and in the pond season, it uses a pigment that has the same hue and reflectance as the environmental color such as plants or soil, such as a cobalt-based composite fired pigment. , azo-based compounds (e.g., JP-A-58-11184)
Pigments described in No. 0, etc.) can be appropriately selected and used.

General extender pigments used in paints may be appropriately selected and used.

The coating composition of the present invention can be applied to moving camouflage equipped equipment by a conventional method such as spraying or brushing, and is excellent in blending with the equipment and can be easily applied in a blurred manner.

In addition, it has sufficient covering power in normal environments and has good soil cleaning performance. Of course, if desired, ultraviolet absorbers, antioxidants, solvents, coagulation-reducing agents, and other additives can be added. As described above, the camouflage coating material used in the present invention can be used in the same way as a normal paint.

Furthermore, this coating film can be easily removed when camouflage is not required by simply cleaning the coating film with an alkaline solution having a pH of 9 or higher and rinsing with water.

The cleaning liquid used for cleaning the coating film may be any aqueous solution of soluble soda, soluble potassium, various amines, etc. as long as its pH is 9 or higher, preferably 10 to 13. An alcoholic solvent and additives can be added to the cleaning solution if desired.

Although the cleaning can be carried out by any method, for example, a method of misting a cleaning liquid and washing with high-pressure water after several minutes can be used as appropriate.

By using such a simple method, it is possible to easily and easily remove the camouflage coating film without damaging the underlying painted surface of the equipment, and by changing the thickness of the camouflage coating film.

Therefore, it is an ideal mobile camouflage system because it is easy to apply, can be applied in any desired color or blurred color, is easy to control the film thickness, is easy to apply in cold regions, and is easy to remove the disguised film when unnecessary. (A) A temporary method of disguising the equipment by painting it is provided.

The present invention will be explained below with reference to Examples. Parts and percentages are by weight unless otherwise specified.

A 5-necked flask is equipped with a thermometer, a stirrer, a nitrogen introduction tube, and 2 dropping funnels, and 8 parts of n-butanol is poured into it, keeping the internal temperature at 12+)°C. A mixture of 46 parts of n-butyl acrylate, 31 parts of n-butyl methacrylate, 23 parts of methacrylic acid, and 3 parts of t-butylperoxy 2-ethylhexanoate was charged in a dropping funnel over 3 hours. During the dropwise addition, nitrogen was introduced and the reaction was carried out at 120°C without stirring. After the dropwise addition was completed, stirring was continued for 30 minutes, and a mixture of 1 part of t-butyl peroxy 2-ethylhexanoate and 20 parts of n-butanol was charged into the mixture using one dropping funnel over a period of 30 minutes. After the dropwise addition was completed, the mixture was further stirred at 120°C for 1 hour and 30 minutes to complete the reaction.

22 parts (solid content equivalent) of the acrylic resin varnish with an acid value (AV/NV > 150) obtained by the above method, 29 parts of acid f Hinatuff as a coloring pigment, 19 parts of calcium carbonate as an extender, and 1 part of an ultraviolet inhibitor. , 1 part of antioxidant, and 28 parts of n-butanol were added and dispersed to obtain a coating solution.Additionally, 2-amino-1-
A 5% aqueous solution of ethanolamine was prepared.

Just before snowfall, apply the above paint solution to the vehicle using Improper Tool 4:
Apply camouflage paint using air spray diluted to 3. At that time, we added blur to the periphery and changed the thickness of the film in the center to make it look like it was covered in snow.

At the time of snow melting, the above removal solution was air sprayed, and after 5 minutes, high pressure water washing was performed. The paint film did not come off or peel off from painting to removal, and the paint film removal work was extremely easy.

[Fire] 1 Place a thermometer, stirrer, nitrogen inlet tube, and two dropping funnels (a, b) in a 5-necked flask, add 80 parts of deionized water and 50% aqueous solution of sodium alkyl diphenyl ether sulfonate. Prepare 1 part and keep the internal temperature at 80℃. Separately prepare a dropping funnel (c). Add a mixture of 30 parts of deionized water and 0.3 parts of ammonium peroxide to the dropping funnel (c).
It took 2 hours to prepare in a). Dripping low! After 5 minutes from the start of dropping in (a), 60 parts of deionized water, 0.9 parts of a 50% aqueous solution of alkyldiphenyl ether sulfonic acid, 37 parts of n-butyl acrylate, 48 parts of n-butyl methacrylate, methacrylic acid. A mixture of 15 parts of lauryl mercaptan and 1 part of lauryl mercaptan was charged into the dropping funnel (b) over 1 hour and 40 minutes. During the 6 dropwise additions, nitrogen was introduced and the reaction was carried out at 8f)'C without stirring. After the dropping was completed, stirring was continued for 1 hour, and a mixture of 218 parts of deionized water and 12 parts of 25% aqueous ammonia was poured into the dropping funnel (c).
I spent an hour preparing it. After the dropwise addition was completed, the mixture was further stirred at 80° C. for 1 hour to complete the reaction.

Acid value (AV/NV) obtained by the above method: 10
1) 24 parts of acrylic resin emulsion (solid content equivalent)
23 parts of titanium oxide as a coloring pigment, as an extender pigment,
24 parts clay, 1 part ultraviolet inhibitor, acid (1 part UV inhibitor)
1 part and 27 parts of deionized water were added and dispersed to form a paint [
I got the liquid. Furthermore, 2-amino-1-
A 10% aqueous solution of ethanolamine was prepared.

Immediately before the vehicle was painted, the above paint solution was diluted 4:2 with deionized water and a camouflage coating was applied to the vehicle using air spray. At that time, we added blur to the periphery and changed the thickness of the film in the center to make it look like it was covered in snow. At the time of snow melting, the above removal solution was air sprayed, and after 5 minutes, high pressure water washing was performed. The paint film did not come off or peel off from painting to removal, and the paint film removal work was extremely easy.

A 1-female, 5-necked flask was equipped with a thermometer, a stirrer, a nitrogen introduction tube, and two dropping funnels, and 80 parts of n-butanol was added thereto to maintain the internal temperature at 120°C. acrylic#! 25 parts of in-butyl,
n-butyl methacrylate 71.2 parts, methacrylic acid 3,
A mixture of 8 parts of t-butylperoxy 2-ethylhexanoate and 3 parts of t-butylperoxy 2-ethylhexanoate was stirred in a dropping funnel for 3 hours. During dropping, nitrogen was introduced and the temperature was kept at 120°C while stirring.
The reaction was carried out. After the dropwise addition was completed, stirring was continued for 30 minutes, and a mixture of 1-1 parts of t-butylperoxy-2-ethylhexanony and 20 parts of n-butanol was charged onto another dropping roller over a period of 30 minutes. is. After the dropwise addition was completed, the mixture was further stirred at 120'C for 1 hour and 30 minutes to complete the reaction.

fs acid gfJ (AV,''NV) obtained by the above method
25 parts of acrylic resin varnish (in terms of solid content), 1 part of acid as a color pigment, 29 parts of hinatan, 19 parts of barium sulfate as an extender, 1 part of ultraviolet inhibitor, 1 part of acid (1 part of inhibitor, and 28 parts of n-butanol) 2-amino-1-ethanolamine 526 aqueous solution was separately prepared as a removing agent.

Just before snowfall, apply the above paint solution to the vehicle using Improper Tool 4:
I diluted it to 3 and applied camouflage paint with air spray. At that time, we added blur to the periphery and changed the thickness of the film in the center to make it look like it was covered in snow.

When the snow melted, the above removal solution was air-sprayed, and 5 minutes later, high-pressure water washing was performed, but the coating film could not be removed.

In a 3- to 5-necked flask equipped with a thermometer, a stirrer, a nitrogen inlet tube, and two dropping funnels, 80 parts of n-butanol was charged and the internal temperature was brought to 120°C. -butyl52,4
A mixture of 47.6 parts of methacrylic acid and 1 to 3 parts of t-butylperoxy-2-ethylhexanony was added using a dropping funnel over 3 hours. During the dropwise addition, nitrogen was introduced and the reaction was carried out at 120°C with stirring. After the addition was complete, stirring was continued for 30 minutes, and 1-1 parts of t-butylperoxy-2-ethylhexanony and 20 parts of n-butanol were mixed and mixed with another dropping funnel.
It took 0 minutes to complete. After completion of dripping, further heat to 120°C
The reaction was completed by stirring for 1 hour and 30 minutes.

Acrylic resin varnish with an acid value (AV/NV) of 310 obtained by the above method was added to 22 parts (in terms of solid content) with an acid as a coloring pigment (29 parts of Hinatuff, 219 parts of Tal as a wood pigment, 1 part of an ultraviolet inhibitor, and an acid). 1 part of antihypertensive agent, and n
- 28 parts of butanol was added and dispersed to obtain a coating liquid.

Furthermore, as a remover, prepare a 5% aqueous solution of 2-amino-1-ethanolamine separately, and apply the above paint solution to the vehicle with an improvator tool just before snowfall.
I diluted it to 3 and applied camouflage paint with air spray. When doing so, blur the periphery and change the thickness of the film in the center to make it look like it is covered in snow. After a short period of time, blisters appeared on the entire surface of the coating, and chalking also occurred, making it impossible to maintain the functionality of the coating.

The adhesion of the paint film of each example and comparative example was determined by
S K 5'400 6.15 The base grain test and tape peeling test were conducted, with the condition that the base cannot be seen after the test, and if both passed, it would be ◎, if only one passed, it would be Δ,
In both cases, failure was marked as ×.

Regarding removability, ◎ indicates that it can be removed without any problem at temperatures below 40°C or above -10'C, and X indicates that it cannot be removed.
And so.

The test results are shown in Table 1 below.9 Table 1 Fruit 1 Fruit 2 Ratio 1 Kewakasaku ◎ ◎ ◎ ◎ Removability ◎ ◎ × ratio 2 × ◎ patent application agent

Claims (4)

[Claims] (1) Mobile camouflage equipment is coated with a paint composition containing an acrylic resin with an acid value of 30 to 300 as a resin vehicle and a colored pigment used for camouflage paint, and when the need for camouflage is no longer needed, the pH level is 9 or higher. A method of temporary camouflage by painting mobile camouflage equipment, which consists of cleaning the coating with an alkaline solution and rinsing with water. (2) The method according to claim 1, wherein the acrylic resin is an acrylic resin emulsion containing an acidic acrylic monomer and having an acid value of 30 to 300 obtained by emulsion polymerization of an ethylenically unsaturated monomer. (3) The acrylic resin contains an acidic acrylic monomer, an emulsion is obtained by emulsion polymerization of an ethylenically unsaturated monomer, and then water-solubilized with an alkali to obtain an acid value of 3.
2. The method according to claim 1, wherein the acrylic resin aqueous solution has a molecular weight of 0 to 300%. (4) The method according to claim 1, wherein the acrylic resin is an acrylic resin varnish containing an acidic acrylic monomer and having an acid value of 30 to 300 obtained by solution polymerization of an ethylenically unsaturated monomer.