KR0126873B1 - Chemical agent resistant 2-component aliphatic polyurethane coating composition and preparation process the same - Google Patents

Abstract

A two-pack aliphatic polyurethane coating composition comprises 4 volumes of A component (main component) and 1 volume of B component (hardening agent). A component consists of pigments satisfying reflection requirement of visible light and infrared radiation required for camouflage pattern-painting, and phthalic-trimethyol propane polyester combined with a volatile solvent. B component consists of aliphatic isocyanate prepolymer combined with a volatile solvent. Use of this coating composition allows formation of coating films being resistive to liquid chemical reactants such as pinacolymethyl phosphonofluoridate and bis-dichloroethyl sulfide.

Description

Two-component aliphatic polyurethane coating composition having chemical agent resistance and preparation method thereof

The present invention relates to a two-component polyurethane coating composition and a method of manufacturing the same, in particular, resistant to the penetration of liquid chemical agents (GD: Pin acolymethyl phosphonofluoridate and HD: bis-dichloroethyl sulfide) to reduce residual pollution and contamination by physical methods. A two-part aliphatic polyurethane paint composition having chemical agent resistance that allows for removal and also meets visible and infrared reflecting requirements for camouflage pattern-painting and methods of making the same.

The present invention is particularly useful for military use, which may be contaminated with chemical agents under special circumstances, and has a need for concealment, and has the same level or superior weather resistance and coating properties as existing paints, and steel and nonferrous vehicles and equipment. It relates to a naturally dry matte paint for use as a top coat.

Alkyd paint has been mainly used as a natural dry type matte infrared camouflage paint. However, existing alkyd paints are known to be soluble in liquid chemical agents. Therefore, conventional alkyd paints can infiltrate and absorb liquid chemicals when they are exposed to chemical agents, and the absorbed chemical agents are sufficient to pose a risk to respiratory and skin hazards to persons without protective equipment for a long time. Continuously release the dose.

For this reason, decontamination agents, ie decontamination agents, have been developed to reduce or eliminate such hazards. The most controversial material developed to date for decontamination of all agents in vehicles and equipment is DS-2 (70% Diethylene Triamine, 28% 2-methoxyethanel, 2% NaOH).

However, DS-2 is effective in neutralizing chemical agents but has some undesirable properties: harmful to the person using it, dissolving alkyd paint, and dissolving some plastics and wool.

Therefore, personal protective equipment is required separately for use. Various attempts have been made to remove these undesirable properties, but so far they have not been successful. Therefore, in order to completely eliminate the risk of chemical agents in the alkyd paint system, the only way to remove the alkyd paint absorbing the chemical agent is by physical method. This method results in physical, human and time loss.

To peel off alkyd paint, it is necessary to remove it to the undercoat naturally, and to paint undercoat and alkyd paint again. Another method is to use an epoxy paint. Epoxy paints have excellent resistance to chemical agent penetration. Unfortunately, the weathering properties of epoxy paints are not satisfactory compared to chemical agent penetration properties.

Epoxy paints have severe choking and gradually have poor color preservation characteristics.

These weathering properties do not significantly affect the chemical agent resistance of the epoxy paint, but the appearance is not satisfactory quickly and the paint ages rapidly.

The polyurethane paints mentioned in US Military MIL-T-81773 are superior to alkyd paints but do not yet have the necessary quality to eliminate the risk of long-term chemical release.

Accordingly, the present invention has been made in order to solve the problems of the prior art as described above, a naturally-dried matt two-component aliphatic polyurethane paint for use as a top coat in vehicles and equipment of steel and non-ferrous metal coating It has the following purpose.

It is a first object of the present invention to provide a composition of a paint composition and a method of preparing the same, which are resistant to the penetration of liquid chemical agents (GD, HD), thereby reducing residual contamination and thus enabling decontamination by physical methods.

A second object of the present invention is to provide a composition formulation of a coating material having a first object and excellent resistance to DS-2, which is a decontamination agent, and a method for producing the same.

The third object of the present invention has a second purpose and at the same time as the conventional coating material properties (mixing, spray coating, brush coating, bending, repainting, water resistance, hydrocarbon resistance, acid resistance, promotion It is to provide a composition formulation of a paint exhibiting weather resistance (etc.) and a manufacturing method thereof.

A fourth object of the present invention provides a composition of a paint having a third purpose and a composition of a paint having a pigment mixture which satisfies the visible and infrared reflecting requirements required for camouflage pattern-painting, and a method of manufacturing the same. Is in.

In order to achieve the above objects in the present invention, the equivalent ratio of 12-17% by weight of aliphatic polyester polyol (based on the topic) and hexamethylene diisocyanate composed of a combination of two kinds of trimethylpropane-orthophthalic polyester is Polyurethane resin produced | generated by the hardening reaction of 1.0: 0.8-1.0: 1.4; 30-60% by weight of a pigment and an extender pigment (subject basis) which satisfy the visible and infrared reflecting requirements for camouflage pattern painting; 30-55% by weight of volatile organic solvent (subject basis) which is stable to optical reaction; It is composed of 0.1-10% by weight of other additives to improve the physical properties of the paint (subject basis), and has a chemical agent resistance. The film-forming material is hexamethylene diisocyanate prepolymer and trimethylpropane-ortope. It is an aliphatic polyurethane resin formed by the reaction with trimethylpropane-Orthophthalic Poly-ste. In addition, in order to adjust the visible and infrared reflectance of the color used in the camouflage pattern painting process, even when the resin combination is the same and the pigment mixture is changed to the color, the chemical agent resistance of the paint and other coating properties are hardly affected. It was confirmed that none.

In more detail, the present invention is a naturally-dried two-component aliphatic polyurethane paint composed of component A (topic) and component B (curing agent).

Component A is composed of phthalic trimethyl propane polyester (phthalic trimethyol propane polyest) combined with pigmented pigment, sieving pigment and volatile solvent.

Component B consists of an aliphatic isocyanate prepolymer combined with a volatile solvent. The paint mixes one volume of component B with four volumes of component A and may be added with the designated diluent if necessary.

Catalyzed isocyanate group / hydroxyl group (NCO ^- / OH) ratio is in this case has a problem in that the chemical agent resistance of the coating decrease falls below should be 1.1 / 1.0 or higher.

The polyester polyol used in A may be used by blending one or two kinds of phthalic trimethylol as propane polyester, and two kinds thereof are used in the present invention.

One of these polyester polyols is a solution dissolved in 1-methoxypropyl acetate-2 at 65% solids (weight ratio) and has an equivalent weight of 300 to 400, a specific gravity of 1.15 ± 0.15 g / cm ³ , an acid value of up to 4 or a solid content of It may be supplied at 100% status.

The polyester polyol having 100% of the solid content has an equivalent of 195 to 260, a specific gravity of 1.25 ± 0.15 g / cm ³ , and an acid value of up to 4.

In the present invention, the same efficacy can be obtained by using either a solid content 65% polyester polyol solution or a solid content 100% polyester polyol.

In the present invention, a 65% solids product was used because it provides convenience in paint manufacturing. Another polyester polyol is a solution of 80% solids (weight ratio) dissolved in butyl acetate. It has an equivalent of 460 to 560, a specific gravity of 1.11 ± 0.15 g / cm ³ , an acid value of up to 2, or a solid content of 100%. Also supplied.

The polyester polyol having 100% of the solid content has an equivalent weight of 368 to 448, a specific gravity of 1.11 ± 0.15 g / cm ³ , and an acid value of up to two.

In the present invention, the same efficacy can be obtained by using either a solid content 80% polyester polyol solution or a solid content 100% polyester polyol.

In the present invention, a product having a solid content of 80% solution is used because it provides convenience in paint manufacturing.

The aliphatic isocyanate prepolymer used in component B is a hexamethylene diisocyanate propolymer solution dissolved in 75% solids in 1-methoxy propyl acetate-2 / xylene (1: 1), specific gravity of 1.07 ± 0.15 g / cm ³ , 255 Has an equivalent of ± 15 and an isocyanate content of 16.5 ± 2.5.

Pigments include pigmented pigments and extender pigments. The pigmented pigment is a formulation that satisfies the X, Y, and Z coordinates of the desired color and at the same time has a formulation that satisfies the visible and infrared reflectances required for each color. Iron oxide used as a cover pigment is synthetic iron oxide, not natural.

Titanium dioxide was used in the choking resistance rutile type in accordance with ASTM, D476, III. No chromate (Cr6) pigments were used and antimony sulfide was excluded. Sieve pigment was used as a sieving pigment. The pigments required to make each color are shown in Table 1.

[Table 1] Pigment Composition

Camouflage colors in the present invention are listed in Table II.

All camouflage colors listed in Table II give the spectral reflectances required for visible (300-700 nanometers) and near-infrared (700-900 nanometers) and are consistent with the numerical requirements for chromaticity.

The colors of this gastrointestinal system are within 2.0 NBS (National Burea of Standard) units of the values listed under standard light source C.

The limits of spectral reflectance for dark green and green are shown in Table III.

[Table Ⅱ] Color reflectance and requirements

Table III Limits of spectral reflectance for dark green and green

The volatile components of component A and component B are composed of a solvent compound which is stable to photochemical reaction, for example, methyl ethyl ketone, 1-methoxypropyl acetate-2, toluene, xylene, true butyl acetate, ethyl acetate, methoxybutyl acetate, and the like. This serves to dissolve the resin in the paint and to disperse pigments and other additives, and to adjust the viscosity of the paint, which is added in an appropriate amount to the required viscosity.

In addition, the present invention used some other additives. In order to improve the wetting and dispersing ability of the dyeing material and to increase the storage stability, the polyamine amide polymer carboxylate may be added in an amount of 0.1 to 1.0% based on the total formulation.

As the antifoaming agent, an antifoaming agent of polysiloxane-based or silicone-free polymer type was used, which is considered to be a better antifoaming agent considering the effect of the latter on the physical properties of the paint.

The addition amount at this time is 0.05 to 2.0% with respect to the total mixture. In order to improve wetting and dispersion and to prevent the floating of pigments, a 50% solution of a high molecular weight unsaturated polycarboxylic acid of a polysiloxane copolymer may be added in an amount of 0.1 to 2.0% based on the total formulation.

Also, 2 ~ 10% of the total mixture of polysiloxane additives containing high boiling point aromatic solvents, ketones and esters is added for the surface coating adjustment and improvement, or 0.1 to 1.0 of the dimethyl polysiloxane copolymer-modified polyester solution is added to the total mixture. % Can be added.

In addition, 2-10% of the polymer wax containing melamine can be added to the total formulation, and 0.01 to 0.5% of the methyl polysiloxane-modified polyester can be added to the total formulation.

As a plasticizer, 0.01 to 0.05% of a copolymer of butyl acrylate and vinyl isobutyl ether can be added to the total mixture.

As the thickener, the synthetic silica powder may be added at 0.01 to 1.0% of the total formulation, or the dibutyltin dilaurate may be added at 0.001 to 0.2% as the crosslinking accelerator. Depending on the type and amount of resins, pigments and solvents, the type and amount of each additive may be added or increased.

In preparing the paint, component B does not need to be milled and is mixed, dispersed and filtered using a suitable mixer.

Component A undergoes premixing and dispersing, milling, redispersion and filtration. In preparing component A, the present invention used a ceramic ball-mill and other general densities such as stand-mill, sand-mill and the like. The present invention eliminates the photo mixing and dispersing process using a ceramic ball mill as an example.

Milling was divided into 1st milling and 2nd milling, 1st milling for 15-30 hours, and 2nd milling for 10 minutes-2 hours.

In the first milling, resins, pigments, solvents, and additives are put into a ceramic ball mill and milled for 15 to 30 hours.

In this case, the input amount is 20 to 80% (volume%) of the ceramic balls and 20 to 80% of the raw material with respect to the total volume of the ball mill.

The rotation speed of the ball mill is 10 to 100 rpm depending on the size of the ball mill, and the order of input of the raw materials can be changed according to the order of resin, solvent, additives and pigments or as necessary.

Depending on the rotation speed of the ball mill, the amount of raw materials and ceramic balls, and the milling time, the color, particle size, dispersion, glossiness, etc. of the paint may be affected.

The first milling is ideal for 18 to 26 hours. Secondary milling is suitable for 30 minutes to 1 hour for milling for 10 minutes to 2 hours with the addition of excess resin, pigments, additives and solvents.

After the second milling, the milled raw material is removed from the ball mill and excess solvent is added to the ball mill for cleaning.

The washed solvent is mixed with the second milled raw material and redispersed by adding an additive, a solvent, etc. using a pre-mixer in a stirring tank. At this time, the redispersion time is about 10 minutes to 1 hour and about 30 minutes are suitable. After the redispersion process is completed, the filtration process is performed.

Next, a preferred embodiment of the present invention is described. However, the examples are only illustrated to more easily understand the present invention, and the present invention is not limited only to the examples.

In addition, since the paint is capable of blending a number of pigments in nature, even if the color is not mentioned here, the resin, pigments, additives, etc. will fall within the scope of the present invention unless the basic framework is greatly changed.

Example 1

The composition of component A is prepared as follows.

158 g of polyester polyol with 300 to 400 equivalents, methyl ethyl ketone 60 g, methoxypropyl acetate-217.4 g methoxybutyl acetate 24.4 g toluene 3.6 g, polyamineamide polymer carboxylate 1.8 g, bentonite 3.6 g, butyl acrylate 0.6 g of vinyl isobutyl ether copolymer, 4 g of silicone-free polymer antifoam, and 5.2 g of 50% solvent of high molecular weight unsaturated polycarboxylic acid of polysiloxane copolymer were added to a ball mill filled with 55 ± 10% of the volume of ceramic balls by volume of 1.5 l. After milling for about 1 hour, 81.2 g of green chromium oxide, 58 g of yellow synthetic iron oxide, 1.84 g of red synthetic iron oxide, 0.8 g of rutile titanium dioxide, 0.4 g of carbon black, 158.2 g of crystalline silica, and 7.5 g of synthetic silica were added thereto. Carry out milling.

The rotation speed of the ball mill is 60 ± 40rpm and the milling time is 18 to 26 hours. After primary milling, secondary milling is carried out for 30 minutes to 1 hour by adding 40.0 polyester polyol having an equivalent of 500 ± 100, methyl ethyl ketone 28, 26 g of butyl acetate, and 67.8 g of silicon earth. After the second milling, the contents are removed from the ball mill into the mixing tank.

38 g of 1-methoxypropyl acetate-2 was added to the ball mill, and the ball mill was washed to remove the mixing tank. A solution obtained by dissolving 3.2 g of dimethyl polysiloxane copolymer-modified polyether and 3.2 g of dibutyl tin dilaurate in 2% of 1-methoxy propyl acetate-2 while attaching a premixer to a mixing tank while stirring. 1.6 g is added, and the mixture is stirred for 5 minutes at low speed and stirred at a speed of 1500 ± 300 rpm for 10 minutes to 1 hour.

Component B is a solution of hexamethylene diisocyanate prepolymer dissolved in 75% solids in 1-methoxy propylacetate-2 / xylene (1: 1) with a specific gravity of 1.07 ± 0.15 g / cm ³ , equivalent to 255 ± 15, and 16.5 ± 2.5 1 part of component B is added to 4 parts of the composition of component A with an isocyanate content of and the dried coating film is 50 ± 10 microns.

Examples 2,3,4

The combination and the amount of the additives of the resin were the same as in Example 1, the solvent was slightly added or decreased in order to match the viscosity, and the same procedure as in Example 1 was carried out except that the mixing ratio of the pigment was changed.

TABLE IV Examples 2,3,4,5

Compositional properties and coating film properties of the composition of the present invention including Examples 1 to 5 are as follows.

The properties of component A are shown in Table V.

TABLE V Component A (Polyester) Properties

The properties of component B are shown in Table VI.

Table VI Component B (Isocyanate) Properties

Each color has the special weighing requirements shown in Table VII.

Total solids, pigment solids, and colorant solids are a percentage of the weight of component A.

The extender pigment fraction is a percentage of the weight of the pigment fraction.

[Table VII] Special Weighing Requirements

The test method of component A and component B mentioned above is as follows.

Test Method of Component A

Total solids (5): KS M2113

Pigment content (%): KS M2111

Whole Color Milling (%): KS M2112

Constitutional pigment (% pigment): KS M2111

Phthalic anhydride (% by weight of nonvolatile developer): KS M4311

Moisture (%): KS M2261

-Assembler and film (% of pigment): KS M2152

-Led (K, U): KS M2122

Softening degree (NS): KS M2141

Test Method of Component B

Total Solids: KS M2113

Viscosity (Gardner tube): KS M2121

Isocyanate Content (%): ASTM D2369

The present invention consists of a two-component type of component A and component B, and when the paint is used, the mixture of component A of 4 parts and component B of 1 volume is used after being left for 10 minutes or more. If necessary, the designated diluent may be added to the mixed paint.

Coatings with a dry film thickness of 50 ± 10 microns provide sufficient gastrointestinal and chemical agent resistance.

The mixed paint has the following characteristics.

Concealment: Aircraft Red-Min 0.94

Aircraft White, Aircraft Yellow-Min 0.92

Other colors-min 0.98

* Test Method-KS M3111

Drying time: Dry touch (minutes): up to 30

Solidification drying (hours): up to 3

Hardening drying (hours): up to 4

* Test Method-KS M2512

Glossiness

All camouflage and sandstone colors: 60 ° -max 1.0

85 °-up to 3.5

Aircraft Green and Aircraft Black: 60 °-Max 0.5

85 ° -1.0

Other aircraft colors and olive drapes: 60 ° -3.0

85 ° -8.0

* Test Method-KS M3312

Mixing characteristics: It is a soft and uniform mixture, and there is no sand, grains, coatings or lumps, and no gelation phenomenon after 8 hours.

* Test method: 4. 3. 13 of National Defense Standard 8010-1047

Spray coating property: Spray coating satisfactorily in all points, and there is no flow, sag and streaking. The dried coating is smooth and matte because there is no merge, stain or color separation.

* Test Method: KS M2412

Paintability: The paint is satisfactorily brushed, so there is no flow, sag, or streaks in the work, and the dry paint does not have powder, stains, discoloration or millet.

* Test Method: KS M2411

Flexibility: In test 4. 3. 16 of KS M3331 and National Defense Standard 8010-1047 Zam, the paint is free from cracking and falling off when bent over a 1/4 inch mandrel.

Repaintability: No drop, softening or bumpy test when tested according to 4.3.3.17 of National Defense Standard 8010-1047.

Water resistance: When tested according to ASTM D1308, the paint is immersed in distilled water at 23 ° ± 1.0 ° C for 168 hours, and there are no wrinkles or bubbles in the test, and there is no bleaching or softening.

Hydrocarbon resistance: After immersion for 168 hours (23 ± 1 ℃) in a hydrocarbon solution (isooctane: toluene = 70: 30) conforming to TT-S-735, III according to Clause 6.4 of ASTM D1308 No bubbles, softening after 2 hours, no bleaching.

Acid resistance: When 3 ~ 5ml of 10% vinegar acid solution is dropped on the surface of paint and left for 1 hour, washed with water and dried, there is no bubble and color change from primary color.

Accelerated Weathering: According to ASTM A G26, Method A, BH, no crack, choking, loss of adhesion or increase of 60 ° and 85 ° gloss when tested for 300 hours and within 2.5NBS of color change.

DS-2 resistance: Test according to 4.2.3 23 of National Standard 8010-1047. Spray paint and bake the specimens for 24 hours at 105 ± 2 ℃ after naturally drying for 24 hours.

Cool the specimen at room temperature and add 2 drops of DS-2 reagent on the surface of the specimen.

It is kept uncovered for 30 minutes, washed thoroughly with water, and immediately tested for no swelling, wrinkles and softening of the coating.

After drying, the color change is less than 2.5 NBS when compared to the tested part of the untested part.

Chemical Agent Resistance: According to item 4. 3.24 of Defense Standard 8010-1047 ZAM, one coating does not emit more than microgram (μg) of chemical agent GD (Pinacolymethyl Phosphonofluor-idat).

Claims (15)

By curing reaction with an equivalent ratio of 12-17% by weight of aliphatic polyester polyol consisting of a combination of two kinds of trimethylpropane-orthophthalic polyester (based on the topic) and hexamethylene diisocyanate of 1.0: 0.8 to 1.0: 1.4 Polyurethane resin produced; 30-60% by weight (subject basis) of pigmented pigments and extender pigments to satisfy the visible and infrared reflecting requirements for camouflage pattern painting; 30-55% by weight of volatile organic solvent (subject basis), stable to optical reaction; A two-component aliphatic polyurethane coating composition having a chemical agent resistance composed of 0.1-10% by weight of other additives for improving the physical properties of the paint. The method of claim 1, wherein the aliphatic polyester polyol is trimethylpropane-orthophthalic polyester, and one kind is dissolved in 65% (weight%) of solid in 1-methoxymethoxy acetate-2. Solution has 300 to 400 equivalents, specific gravity of 1.15 ± 0.15 g / cm ³ , acid value of up to 4, or 100% of 195 to 260 equivalents, specific gravity of 1.25 ± 0.15 g / cm ³ , maximum of 4 The other is a solution dissolved in 80% (weight%) solids on butyl acetate, having an equivalent weight of 460 to 560, a specific gravity of 1.11 ± 0.15 g / cm ³ , an acid value of up to 2, or a solid content of 100% Case 268-448 equivalent, 1.15 ± 0.15 specific gravity, two-component aliphatic polyurethane coating composition having a chemical agent resistance, characterized in that it has a maximum acid value of 2. The trimethylpropane-orthophthalic polyester according to claim 2, having a equivalent of 368 to 448 with a trimethylpropane-orthophthalic polyester having 195 to 260 equivalents when the two kinds of trimethylpropane-orthophthalic polyester are combined with those having a solid content of 100%. The combination ratio with trimethylpropane-offtophthalic polyester is 99: 1 to 60:40 by weight, wherein the combination phthalic anhydride has a maximum of 42% by weight relative to the nonvolatile volatile agent of component A (topic), A two-component aliphatic polyurethane paint composition having a chemical agent resistance, characterized in that the colorant has 12 to 17% (weight%) of the component A. The chemistry according to claim 3, wherein in the combination of the two kinds of trimethylpropane-orthophthalic polyesters, both are made by combining 100% solids, 65% solids or 80% solids. Two-part aliphatic polyurethane coating composition having agent resistance. The hexamethylene diisocyanate prepolymer solution according to claim 1, wherein the hexamethylene diisocyanate (1-methoxy propylacetate-2) (xylene) is dissolved in 75% of a solid content in 1: 1 to 1.07 ± 0.15 g / cm ³ . A two-component aliphatic poly having a chemical agent resistance, characterized by having a specific gravity, an equivalent of 255 ± 15, and an isocyanate content of 16.5 ± 2.5, having a maximum N of Garuret viscosity and a maximum of Z ₂ of the trimer viscosity. Urethane paint composition. The component A (the subject) and the said hexamethylene diisocyanate prepolymer as a component B (curing agent) of Claim 3 or 5 containing the substance which the said two types of trimethylpropane- orthophthalic polyesters combined. Component A (topic): Component B (curing agent) = 4: When mixing at a 1 volume ratio, the functional groups of the trimethylophane-offtopphthalic polyester are an isocyanate group (NCO) which is a functional group of hydroxyl group (OH) and hexamethylene diisocyanate prepolymer. ^-) with a chemical equivalent ratio of the hydroxyl (OH}: the isocyanate (NCO ^-) = 1.0: 2-component aliphatic polyurethane coating compositions having a resistance to chemical agents, characterized by 0.8 to 1.0 comprised of a resin in combination. The total pigment content of the coloring pigment and the sieving pigment satisfying the visible and infrared reflecting requirements required for painting the camouflage pattern is 30 to 60% (weight%) with respect to component A (topic). The extender pigment component is a two-component aliphatic polyurethane coating composition having a chemical agent resistance, characterized in that 0.1 to 90% (weight) to the total pigment component. The two-component type according to claim 3 or 7, wherein the total solid content in component A (the subject) including the total colorant and the total pigment is 45 to 70% with respect to the total weight ratio. Aliphatic Polyurethane Paint Composition. The volatile organic solvent stable to the optical reaction according to claim 1 is methyl ethyl ketone (20 to 50%), 1-methoxy propyl acetate-2 (20 to 50%) and toluene (8 to 12) based on the total weight of the solvent. %), Xylene (0.1 to 8%), positive butyl acetate (5 to 15%), ethyl acetate (0.1 to 5%), methoxy butyl acetate (10 to 30%), and the volatile solvent is component A A two-component aliphatic polyurethane paint composition having a chemical agent resistance, characterized in that it has 30 to 55% (weight%) relative to (topical). According to claim 1, The other additives for improving the physical properties of the paint is a sedimentation inhibitor for improving the wetting and dispersing power of the pigment and to increase the storage stability of the polyamineamide polymer carboxylate 0.1 to 1.0 with respect to the component A total mixture % (Weight%), 0.05-2.0% (Weight%) of polysiloxane-based or silicone-free polymer antifoaming agent as antifoaming agent, high molecular weight unsaturated polycarboxyl of polysiloxane copolymer to improve wetting and dispersion and to prevent pigment floating 0.1% to 2.0% (weight%) of 50% acid solution, 2% to 10% polysiloxane additive containing solid solution, ketones and esters, and dimethylpolysiloxane copolymer modified polyether solution 0.1 to 1.0%, melamine-containing polymer wax 2 to 10% (weight%), methylpolysiloxane modified polyester 0.01 to 0.5 (weight%), plasticizer butyl acrylate and vinyl 0.01 to 0.5% (wt%) of sobutyl ether, 0.1 to 5% of synthetic silica powder as a middle agent, 0.01 to 1.0% (weight%) of tertiary amine or 0.001 to 0.2% of dibutyltinurate as a crosslinking accelerator A two-component aliphatic polyurethane coating composition having a chemical action resistance, characterized by using (weight%). Polyurethane resins produced by the reaction of aliphatic polyester polyols composed of a combination of two kinds of trimethylpropane-orthophthalic polyesters and hexamethylene diisocyanate; A combination of colored pigments and extender pigments which satisfy the visible and infrared reflecting requirements for camouflage pattern painting; Organic solvents stable to optical reactions; In preparing and preparing a two-component polyurethane paint composition having chemical agent resistance composed of other additives to improve the physical properties of the paint, milling is performed using a mill, and milling is performed. A method for producing a two-component aliphatic polyurethane paint composition having chemical agent resistance, comprising a step of performing redispersion and filtering in a stirring tank using a mixer. The method of claim 11, wherein the mill is a ceramic ball mill (ceramic ball-mill) in which 20 to 80% (volume%) of ceramic balls and 20 to 80% (raw material) are added to the total volume of the ceramic. At this time, the rotation speed of the ceramic ball mill at this time is a method for producing a two-component aliphatic polyurethane paint composition having a chemical agent resistance, characterized in that 10 to 100rpm. The method of claim 11, wherein the first milling (milling) is to mill the component A (topic) composition in a ceramic ball mill, and milling around 1 hour by adding a polyester polyol having a equivalent of 300 to 400, a part of a solvent, and a part of additives. And then adding the total amount of the coloring pigment and a part of the extender pigment to mill for 15 to 30 hours at a ball mill rotational speed of 60 ± 40 rpm, wherein the two-component aliphatic polyurethane coating composition having chemical agent resistance is produced. 12. The method of claim 11, wherein the secondary milling (ring) is also to ring the component A (topic) composition in a ceramic ball mill, a polyester polyol having an equivalent weight of 460 to 560, the first milling of a part of the sieving pigment A method for producing a two-component aliphatic polyurethane paint composition having chemical agent resistance, characterized in that it is added to a ceramic ball mill and milled for 10 minutes to 2 hours at a ball rotation speed of 60 ± 40 rpm. 12. The composition of claim 11, wherein after the mill is washed, redispersion is carried out in a stirring tank using a premixer. After washing the ceramic ball mill with a solvent left for washing, the second milling of the washing solution is performed. The mixture is mixed with the stirring tank, and the premixer is slowly added while stirring the premixer at low speed (500 ± 100rpm) for 5 to 5 minutes, and then at 1500 ± 3000rpm for 10 minutes to 1 hour at the rotation speed of the premixer. A method for producing a two-component aliphatic polyurethane coating composition having chemical agent resistance, characterized in that it is redispersed and filtered.