KR100782321B1 - A composition of paint and varnish for easy cleaning - Google Patents

Abstract

A paint composition for easy cleaning is provided to improve hardness, gloss and the resistance against organic contaminant or smoke, thereby using it to remove illegal advertising stickers. A paint composition comprises a base resin which has an adhesive strength to the material to be coated and comprises at least one selected from a polyester polyol resin, a thermosetting acrylic resin, a thermoplastic acrylic resin and a modified silicone resin; a crosslinking agent for curing the base resin; a photocatalyst comprising titanium dioxide(TiO2) for self-cleaning; polydimethylsiloxane for the adhesion with the crosslinking agent; and a UV absorber for preventing discoloration and discoloration.

Description

Paint composition for easy cleaning {A COMPOSITION OF PAINT AND VARNISH FOR EASY CLEANING}

The present invention relates to a coating composition. In particular, the present invention relates to a coating composition for easy cleaning, which can improve adhesion prevention performance and make the surface of the coating film superhydrophilic to significantly reduce the binding force between various lipophilic contaminants and the surface of the facility.

Illegal advertisements are indiscriminately attached with various adhesives to public facilities such as underground transformers, telegraph poles, traffic light poles, street lamps, and road signposts in urban areas. Since such illegal advertisements are not easy to remove, not only the urban landscape is damaged, but also the public facilities are being damaged, and measures to prevent illegal advertisements are urgently needed to protect the urban appearance and public facilities.

Conventional antifouling paints are used by floating an additive such as wax or silicone oil on the surface of the coating film as a part to easily remove the deposits. Such a conventional paint is not secured durability, it can only see the anti-sticking effect in a very short period of time, the weather resistance and pollution resistance is degraded due to long-term outdoor exposure is a problem that the facility is easily contaminated as the seal after construction there was.

Thus, another method is to use embossing materials such as very large grains of stone, sawdust, glass beads or fine silicone resin powder with excellent releasability to form artificial unevenness for the purpose of minimizing the area of deposits on the coating film surface. Doing. However, this method also helps to prevent attachments at an early stage after construction, but is easily contaminated with various contaminants as the outdoor exposure period elapses, and contaminants are not easily removed no matter how washed.

Therefore, in order to overcome such a problem, it is necessary to prevent various attachments from attempting to attach itself from the beginning, and at the same time, make the anti-sticking function as the seal elapses. In other words, by introducing the concept of self-cleaning of the facility itself in addition to the above anti-sticking function, it prevents contaminants from infiltrating into the facility at the source. The development of paint is required.

In order to solve the above problems, the present invention, the coating composition for easy cleaning that can improve the anti-sticking performance, super-hydrophilic coating surface can significantly reduce the binding force between various lipophilic contaminants and the surface of the facility. The purpose is to provide.

In order to achieve the above object, the present invention is a resin having an adhesion to a predetermined coating object, a gas resin comprising at least one of polyester polyol resin, thermosetting acrylic resin, thermoplastic acrylic resin and modified silicone resin, and A photocatalyst comprising a crosslinking agent for curing the gas resin, a titanium dioxide (TiO ₂ ) for self cleaning, and a functional group for bonding with the crosslinking agent, and a poly for preventing adhesion of deposits. Provided are an easy cleaning coating composition comprising dimethylsiloxane and an ultraviolet absorber for preventing discoloration and discoloration.

In the present invention, it further comprises a crosslinking agent comprising hexamethylene diisocyanate for curing the gas resin.

In the present invention, the base resin is at least one of a polyester polyol resin, a thermosetting acrylic resin, a thermoplastic acrylic resin and a modified silicone resin.

In the present invention, when the base resin is a polyester polyol resin, it contains 20 to 60 parts by weight in 100 parts by weight of the total paint.

In the present invention, the photocatalyst is titanium dioxide (TiO ₂ ).

In the present invention, the titanium dioxide is 0.5 to 10 parts by weight in 100 parts by weight of the total paint.

In the present invention, the titanium dioxide has a primary particle size of 10 nm or less, the crystal phase is of anatase type, and the purity is 99.5% or more.

In the present invention, the polydimethylsiloxane includes a functional group for bonding with the crosslinking agent.

In the present invention, the polydimethylsiloxane includes a hydroxy group as a functional group for bonding with the crosslinking agent.

In the present invention, the polydimethylsiloxane includes 1 to 10 parts by weight in 100 parts by weight of the total paint.

In the present invention, the active ingredient content of the hydroxyl group contained in the polydimethylsiloxane is 1 to 10 parts by weight based on the total weight of the polydimethylsiloxane.

In the present invention, the ultraviolet absorber includes 1 to 3 parts by weight of HPT (Hydroxyphenyl-triazine) based and 1 to 3 parts by weight of HLS (Hindered amine light stablizer) based on 100 parts by weight of the paint.

Hereinafter, the coating composition for easy cleaning according to the present invention will be described in detail.

Descriptions of technical contents that are well known in the art to which the present invention pertains and are not directly related to the present invention will be omitted. This is to more clearly communicate without obscure the subject matter of the present invention by omitting unnecessary description.

BACKGROUND OF THE INVENTION The present invention typically comprises a base resin for forming a paint and includes a gas resin including a crosslinking agent, a solvent and an additive, and in particular a photocatalyst for self cleaning and a poly group including a functional group for bonding with the crosslinking agent. Dimethylsiloxane and ultraviolet absorber.

First, at least any one of a polyester polyol resin, a thermosetting acrylic resin, a thermoplastic acrylic resin, and a modified silicone resin is used as a base resin having adhesion to a predetermined workpiece. In particular, when using a polyester polyol resin, it contains 20 to 60 parts by weight in 100 parts by weight of the total paint. Such polyester polyol resins are easier to control elastic modulus than acrylic resins or polyurethane resins and are relatively strong to ultraviolet rays of sunlight. In addition, a gas resin such as a polyester polyol resin includes a crosslinking agent for curing such a gas resin, and is a crosslinking agent that is chemically reacted with a molecular sieve of a thermoplastic material and interconnects molecular sieves. A hexamethylene diisocyanate aliphatic compound is used and is used in an amount of 15 to 40 parts by weight in 100 parts by weight of the total paint. Such hexamethylene diisocyanate has more stable characteristics to light than tolylene diisocyanate, diphenylmethane diisocyanate, 1.5-naphthylene diisocyanate, isophorone diisocyanate and the like. Here, the blending ratio of polyester polyol resin and hexamethylene diisocyanate contains 30 to 80 parts by weight of polyester polyol resin, and 20 to 70 parts by weight of hexamethylene diisocyanate in 100 parts by weight of the total amount of the cationic component. Adjust the / NCO molar ratio to 1.0 to 1.1.

Subsequently, titanium dioxide (TiO 2) is used as a key raw material for the photocatalyst. Such titanium dioxide is important for the primary particle size, but can be used from several nano to tens of nanoscale, but in order to maximize the photocatalytic performance, using a nano fine, for example, ultra fine powder of 5 to 10 nanoscale specific surface area (100m² / g or more) Maximize). The purity of titanium dioxide should be 99.5% or more, and the crystal phase uses an anatase type. In addition, the blending ratio of the titanium dioxide pigment in the total 100 parts by weight of the paint contains 0.5 to 10 parts by weight, preferably 3 to 7 parts by weight. Silver (Ag) may be used as such a photocatalyst, but in reality, it is economical to use titanium dioxide as a raw material. Therefore, by using the nano-type titanium dioxide pigment, hydrophilic film formation and self-cleaning function, which are photocatalytic functions, are expressed, and even though water such as rain water only touches the surface of the coating film, lipophilic contaminants are simply washed off, thereby reducing the cleaning cost. .

Next, polydimethylsiloxane containing a functional group for bonding with a crosslinking agent is used as the resin for the additive. At this time, those containing hydroxy groups, carboxylic acids and amines as functional groups can be used, and those containing hydroxy groups are preferably used. The chemical formula of the polydimethylsiloxane containing such a hydroxyl group is as follows.

Part of the hydroxy group should be able to continuously exert its function by allowing urethane reaction with hexamethylene diisocyanate, which is a crosslinking agent, to be formed into a coating film and remaining in the coating film. Thus, the surface of the coating film can be made of a small number, oleophobic, which is a characteristic of the hydroxyl group, to prevent the adhesion of illegal deposits. Here, the active ingredient content of the hydroxy group contains 1 to 10 parts by weight, and preferably 0.5 to 3 parts by weight is most economical. The polydimethylsiloxane may be contained in an amount of 1 to 10 parts by weight, and more preferably 3 to 10 parts by weight, in 100 parts by weight of the total paint.

Subsequently, the ultraviolet absorber includes a mixed ultraviolet absorber including 1 to 3 parts by weight of HPT (Hydroxyphenyl-triazine) based and 1 to 3 parts by weight of HLS (Hindered amine light stablizer). Such ultraviolet absorbers are intended to protect against discoloration and discoloration by ultraviolet rays in sunlight in the coating film.

Subsequently, the organic solvent may include hydrocarbons, esters and ketones. Specifically, hydrocarbons include toluene, xylene and the like, esters include normal butyl acetate, ethylene glycol ethyl ether acetate and the like, ketones include methyl isobutyl ketone, methyl ethyl ketone and cyclohexanone These may be used alone or in combination. At this time, the organic solvent contains 10 to 25 parts by weight in 100 parts by weight of the total paint, and the boiling point of the solvent in consideration of the solubility parameter, evaporation rate, etc. with a gas resin, that is, polyester polyol resin among these organic solvents 80 ~ 250 It is good to select a solvent which is ℃, more preferably a solvent that is 110 ~ 150 ℃.

Subsequently, the additives include 0.1 to 1.0 parts by weight of an antifoaming agent to remove air bubbles on the surface of the coating film, 0.1 to 1.5 parts by weight of the surface conditioner to improve the smoothness of the surface, and 0.1 to 1.5 parts by weight of the wetting agent to help the paint penetrate various materials. use.

Hereinafter, by the examples and comparative examples of the coating composition for easy cleaning (Easy Cleaning) according to the present invention described above, the present invention is not limited thereto.

In the following Examples and Comparative Examples, parts and percentages are based on weight unless otherwise specified.

Example  One

As a first example, experiments were carried out to select gas resins and curing mechanisms with excellent adhesion, gloss, hardness and flexibility to various materials. To this end, a mixture of gas resins, crosslinking agents, additives and solvents commonly used in the paint field are mixed in a stirring vessel for 10 minutes with a 300RPM stirrer, and the compositions 1-1 to 1-4 are as shown in Table 1 below. Four paints were prepared.

TABLE 1

Raw material Example 1-1 Example 1-2 Example 1-3 Example 1-4 Polyester polyol resin 45 Thermosetting Acrylic Resin 60 Thermoplastic Acrylic Resin 65 Modified silicone resin 60 Hexamethylene diisocyanate (HDI) 25 9 Mixed solvent 26 27 31 36 Other additives 2 2 2 2 Tinuvin 292 2 2 2 2

Specific matters of the composition used in Example 1 of the present invention are as follows.

First, a total of four types were used as gas resins. Specifically, polyester polyol resins prepared by King Industrie have a hydroxyl group of 200 to 400 mg KOH / g, an acid group of 1 to 20 mg KOH / g, and a solid content of 50 to 100. %, The thermosetting acrylic resin prepared by Aekyung Chemical has a hydroxyl group of 41 mg KOH / g, an acid group of 2.3 to 3.3 mg KOH / g, and a solid content of 50%. The thermoplastic acrylic resin has an acid value of 2 to 5 mg KOH / g and a solid content of 45%. , Tg (Glass Transition Temperature) is 35 ℃, the modified silicone resin produced by Degussa (silicone polyester, 35% silicon content, solid content 57 ~ 60%. In addition, Aekyung Chemical's non-yellowing type hexamethylene diisocyanate used as a crosslinking agent has a solid content of 50 to 100%, NCO 15 to 25%, Gardner viscosity X to Z2, and a mixed solvent of toluene / xylene / normal butyl acetate 30 It has a weight ratio of / 30/40. As other additives, a silicone surface modifier, a material wetting agent, and an antifoaming agent manufactured by BYK were used. Finally, HALS (Hindered amine light stablizer) -based Tinuvin 292 manufactured by Ciba-Geigy was used as an ultraviolet absorber.

Subsequently, using the four kinds of paint composition as shown in Table 1, the coating properties test was performed as follows.

As a test piece for the coating performance evaluation experiment, a material that can represent various materials was used. For example, metals were selected from aluminum, plastics from polycarbonate (PC), wood from medium density fiberboard (MDF), and rubber from EPDM (Ethylen Propylene Diene Terpolymer). In addition, the size of the specimen was produced in a horizontal, vertical 10 X 15 cm. For the pretreatment of the specimens above, a simple alcohol wash and dust and dirt removal were performed using air pressure. For a full-scale experiment, the paint prepared as shown in [Table 1] was coated on the specimen with a dry film thickness (DFT) of 20 to 30 μm using an air spray method and pre-dried for 10 minutes in a 60 to 70 ° C. drying furnace. It was. Then, in this drying process, only the aluminum specimen of the specimen coated with the modified silicone resin of the type 1-4 in Table 1 in consideration of the characteristics of the paint type was dried for 30 minutes in a 250 ℃ drying furnace, the other coating is applied All of the specimens were subjected to main drying for 1 hour in a 90 ° C. drying furnace.

Thus, the coating film property experiments performed as described above were evaluated as follows.

First, the gloss measurement item used the 60 ° mirror gloss test method of the paint of KSM 5000-3312. Specifically, the gloss meter measures the reflectance when the incident angle and the horizontal angle are 60 °, respectively. The average value measured five times was taken as a percentage when the figure was set to 100.

Then, the adhesive test item was applied to the number of remaining pieces of coating surface separated into 100 pieces on the coating film by cutting horizontally and vertically at 1 mm intervals with a knife and sticking a cellophane adhesive tape on the upper surface of the specimen. Was evaluated.

Subsequently, the pencil hardness method of JIS K-5400 was used for the coating film hardness item, and specifically, the degree of the scratch at the time of drawing at a 45 degree angle for each kind of pencil to the dried coating film using the pencil hardness tester was visually determined.

Subsequently, the test item of bendability was bent to 180 ° on a round bar having a diameter of 5 mm, and then returned to its original position to determine whether the bent portion had peeled off the coating and the presence of cracks.

Therefore, the coating film properties evaluated as described above are as specified in the following [Table 2].

TABLE 2

Test Items Example 1-1 Example 1-2 Example 1-3 Example 1-4 60 ° mirror polish aluminum 90 93 87 87 P.C 87 92 90 N / A MDF 88 92 88 N / A EPDM 91 95 90 N / A Adhesiveness (%) aluminum 100 100 85 100 P.C 100 100 93 N / A MDF 100 100 75 N / A EPDM 100 95 70 N / A Pencil hardness aluminum H H 2H 2H P.C HB H 2H N / A MDF H H H N / A EPDM HB HB H N / A Flexibility aluminum Good Microcracks Peeling Good P.C Good Microcracks Peeling N / A MDF N / A N / A N / A N / A EPDM Good Peeling Peeling N / A

For reference, the modified silicone resin type 1-4 was not applicable except for aluminum specimens because the resin curing temperature is at least 220 ℃, wood (MDF) was not subjected to the flexural test.

As a result, as shown in Table 2, Example 1-1 using a polyester polyol resin generally has good physical properties in almost all materials. On the other hand, Example 1-2 using the thermosetting acrylic resin was poor in the flexibility of the rubber material (EPDM), Example 1-3 using the thermoplastic acrylic resin was poor in the adhesion and flexibility, and the silicone resin In Example 1-4 used, since the minimum curing temperature should be 220 ° C. or higher, it showed unsuitable physical properties for materials other than metal. Therefore, in the following Example 2, the basic resin curing mechanism is to use the gas resin of the polyester polyol of Example 1-1 and the hexamethylene diisocyanate (HDI) type crosslinking agent of the yellowing type.

Example  2

As a second embodiment, a composition for improving the adhesion prevention and non-pollution performance of various illegal deposits was selected through the following experiment. To this end, the raw materials specified in Table 3 were sequentially added to the stirring vessel, followed by stirring for 10 minutes with a 300 RPM stirrer to prepare 7 paints 2-1 to 2-7.

TABLE 3

Raw material Example 2-1 Example 2-2 Example 2-3 Example 2-4 Example 2-5 Example 2-6 Example 2-7 Polyester polyol resin 45 45 45 45 45 45 45 Hexamethylene diisocyanate 25 25 25 21 21 21 21 Mixed solvent 20.5 15.5 20.5 17.5 17.5 17.5 17.5 Other additives 2 2 2 2 2 2 2 Tinuvin 479 1.5 1.5 1.5 1.5 1.5 1.5 1.5 Tinuvin 292 One One One One One One One 8nm TiO ₂ 5 5 - - - - - 30nm TiO ₂ - - 5 - - - - TEGO protect 5000 - 5 - 8 - - - Tospearl 2000 - - - - 8 - - Ceracol 39 - - - - - 8 KF 96 - - - - - - 8

Specific matters of the composition used in Example 2 of the present invention are as follows.

As a UV absorber, HPT (Hydroxy phenyl-triazine) -based Tinuvin 479 and HALS (Hindered amine light stablizer) -based Tinuvin 292 manufactured by Ciba-Geigy were used. The photocatalyst used was 8nm TiO2 for nano lab research and 30nm TiO2 manufactured by Dalian Luming Nanometer Material. At this time, 8 nm TiO2 has a primary particle size of 8 nm, specific surface area of 110 m 2 / g, purity of 99.9%, crystalline anatase type, and 30 nm TiO 2 has primary particle size of 30 nm, specific surface area of 30 m 2 / g, purity of 99%, crystal phase Anatase type. In addition, a polydimethylsiloxane containing a hydroxyl group manufactured by Degussa, such as TEGO protect 5000, was used as the additive resin, wherein the active ingredient content of the hydroxyl group was 1.2 to 1.5%. In addition, Tospurl 2000 manufactured by Toshiba is a fine resin resin powder with a particle size of 20 ~ 50㎛, Ceracol 39 manufactured by BYK is a polyethylene wax as a solid content of 40%, KF (96) manufactured by Shin-Etsu has a melting point of 110 ° C and has a viscosity of 1,000 cps as dimethylsilicone oil.

As shown in [Table 3], test specimens were prepared in the same manner as in Example 1 to evaluate the coating film properties of the seven paints, and the test items and test evaluation methods are as follows.

First, the QUV Accelerated Weathering Test item used ASTM G-53's QUV Accelerated Weathering Tester. Specifically, UV fluorescent lamps were UV-B313 lamps (280-315 nm). The gloss preservation value and color difference were evaluated by time (7 days) and 720 hours (30 days). The gloss preservation value was calculated by the following equation using a glossmeter (BYK) company.

           60 ° mirror gloss after experiment

Glossy Preservation Value (%) = --------------------------- X 100

           Initial 60 ° Mirror Polish

In addition, a spectral colorimeter, which is a diffuse reflectance measuring device, was used as the color difference, and the difference between the two colors was expressed from the visual concept to the numerical concept. That is, the geometric distance of the two colors in the color space coordinates is expressed numerically and calculated by the following equation.

Color difference (△ E) = [(△ L) ² + (△ a) ² + (△ b) ²] ½

Where L is a brightness index of the Hunter color display system, and a and b mean chromatic coefficients of the Hunter color display system.

Subsequently, the accelerated contaminant item was sprinkled with a solution of 20 parts by weight of carbon black dispersed in water, dried in a 30 ± 2 ° C. constant temperature oven for 5 hours, and then washed with water and rubbed. These experiments were performed immediately after the specimen was prepared and after 60 days in the open air. The water washability was visually judged as the remaining state after being washed down naturally by applying the surface coated with carbon solution to the flowing water, and the rubability was visually determined as the degree of wiping from the surface when the surface of the coating was wiped with gauze or tissue.

Subsequently, the attachable release property items are various stickers, oriented polypropylene (OPP) tapes, blue tapes, etc., attached to the coating film, and then rubbed to be in close contact with each other. The degree of fall easily was determined. This experiment was also performed immediately after specimen preparation and repeated experiments were performed after leaving for 60 days outdoors. The experimental results thus obtained are shown in the following [Table 4].

TABLE 4

Test Items Example 2-1 Example 2-2 Example 2-3 Example 2-4 Example 2-5 Example 2-6 Example 2-7 Promoting weather resistance 148 hours aluminum Glossy Preservation Value (%) 98 99 98 97 98 97 98 Color difference (△ E) 0.05 0.05 0.07 0.05 0.06 0.07 0.05 PC Glossy Preservation Value (%) 99 98 97 98 97 97 98 Color difference (△ E) 0.03 0.05 0.07 0.05 0.06 0.06 0.04 MDF Glossy Preservation Value (%) 96 97 96 95 94 94 93 Color difference (△ E) 0.06 0.04 0.07 0.09 0.12 0.12 0.17 EPDM Glossy Preservation Value (%) 97 98 94 95 95 94 94 Color difference (△ E) 0.04 0.05 0.05 0.06 0.05 0.07 0.09 720 hours aluminum Glossy Preservation Value (%) 95 97 95 93 90 91 90 Color difference (△ E) 0.07 0.04 0.06 0.09 0.12 0.11 0.14 PC Glossy Preservation Value (%) 96 98 95 92 91 88 91 Color difference (△ E) 0.05 0.05 0.05 0.11 0.09 0.14 0.10 MDF Glossy Preservation Value (%) 94 96 95 94 92 84 85 Color difference (△ E) 0.06 0.05 0.07 0.11 0.15 0.17 0.19 EPDM Glossy Preservation Value (%) 96 96 95 95 90 90 87 Color difference (△ E) 0.05 0.04 0.07 0.09 0.13 0.13 0.17 Promote pollution Immediately after specimen preparation aluminum Water washability ◎ ◎ ◎ ◎ ◎ ○ ○ Rub ◎ ◎ ○ ○ ○ □ □ PC Water washability ◎ ◎ ◎ ◎ ◎ □ □ Rub ○ ◎ ◎ ◎ □ □ △ MDF Water washability ◎ ◎ ○ ◎ ◎ ○ ○ Rub ○ ◎ ○ ○ ○ ○ □ EPDM Water washability ○ ○ ○ ○ ○ ○ △ Rub ○ ○ ○ ○ ○ □ △ After 60 days aluminum Water washability ◎ ◎ ◎ ◎ □ △ × Rub ○ ○ ○ ○ △ × × PC Water washability ○ ◎ ◎ ○ □ △ × Rub ○ ○ ○ ○ □ △ × MDF Water washability ○ ○ ○ ○ □ × △ Rub ○ ○ × × □ × △ EPDM Water washability ○ ◎ △ □ △ △ × Rub ○ ○ □ △ × × ×

Attachment formability Immediately after specimen preparation aluminum sticker ○ ◎ ○ ◎ ○ ◎ ◎ OPP tape for packing □ ◎ □ ◎ ○ ◎ ◎ Blue tape □ ◎ □ ◎ □ ○ ◎ PC sticker □ ◎ □ ◎ ○ ◎ ◎ OPP tape for packing □ ◎ △ ◎ ○ ○ ◎ Blue tape □ ◎ △ ◎ ○ ○ ○ MDF sticker ○ ◎ □ ◎ ○ ◎ ◎ OPP tape for packing □ ◎ △ ◎ ○ ○ ○ Blue tape □ ◎ □ ◎ ○ ○ ○ EPDM sticker ○ ◎ ○ ◎ ○ ○ ○ OPP tape for packing □ ◎ △ ◎ ○ ○ ○ Blue tape △ ○ △ ◎ □ △ ○ After 60 days aluminum sticker □ ◎ □ ◎ ○ □ △ OPP tape for packing △ ◎ □ ◎ □ □ × Blue tape △ ○ △ ○ □ △ × PC sticker □ ◎ △ ◎ □ □ △ OPP tape for packing △ ◎ △ ○ □ △ △ Blue tape △ ○ △ □ □ △ × MDF sticker □ ◎ △ ◎ ○ ○ △ OPP tape for packing □ ○ △ ○ □ ○ × Blue tape △ ○ × □ □ □ × EP DM sticker △ ○ △ ○ □ △ × OPP tape for packing △ ○ △ □ □ △ × Blue tape × ○ × △ × △ ×

Very good ◎ / ○ Good / Normal □ / Poor △ / × poor

As a result, as shown in Table 4, accelerated weathering properties, non-pollution properties, and anti-adhesion properties are as follows.

The accelerated weathering characteristics are the glossiness retention value (%) and the color difference (ΔE) derived from the above-described formulas. All of the color difference items are slightly better than other types.

Subsequently, Examples 2-1, 2-2 and 2-3, which are types containing nano-sized titanium dioxide, are most preferred for non-contamination properties. In particular, Example 2-1 and Example 2-2, which are types containing sun nano-class titanium dioxide, are superior to Example 2-3, which is type containing tens of nano-class titanium dioxide.

Subsequently, Example 2-2 and Example 2-4 using polydimethylsiloxane containing a hydroxyl group are the best in anti sticking property. Example 2-7 using KF (96), which is a similar component, dimethyl silicone oil, had a good anti-adhesion performance at the beginning, but exhibited a significant deterioration in anti-adhesion function over time. Example 2-5 and Example 2-6, which are other silica powders or wax types, were also initially good, but exhibited inferior function as the outdoor standing time passed.

To summarize the above results, Example 2-2 is Example 2-1, Example 2-3, and Example 2, which are types of a mixture of polydimethylsiloxane containing hydroxyl group and a hydroxyl group of titanium dioxide. The most preferable result was obtained among 4, Example 2-5, Example 2-6, and Example 2-7.

Therefore, the paint composition as described above has excellent adhesion strength and gloss to various public facilities materials including metal, rubber, plastic, glass, and wood, and can control urethane bond crosslinking appropriately to enable high elasticity and high durability. In addition, it is easy to control the elastic modulus of the coating film and can easily absorb large impact energy.

In addition, hydrophobic film formation and self-cleaning function, which are photocatalytic functions, are expressed by using a nano-titanium dioxide pigment, so that lipophilic contaminants are simply washed away even if rain water such as rain water comes to the surface of the coating film. In addition, the photocatalyst function is effective for the maintenance of the public facilities because it is possible to form a small number, oleophobic coating, which is the performance of the polydimethylsiloxane containing hydroxy groups, and thus attempts to attach stickers or various attachments to the facilities.

Although specific embodiments of the present invention have been described with reference to the embodiments, this is intended to be easily understood by those skilled in the art and is not intended to limit the technical scope of the present invention. Therefore, the technical scope of the present invention is determined by the matters described in the claims, and the embodiments may be modified or modified as much as possible within the technical spirit and scope of the present invention.

As described above, according to the present invention, when the Easy Cleaning paint prepared on the basis of the experimental results as described above is applied to public facilities on the roadside, it is attached to almost all facilities without being limited by the applied materials. A coating film having excellent strength, hardness, and gloss can be formed, and adhesion of various illegal advertisement stickers or unauthorized attachments can be prevented in advance. In addition, since it is very resistant to various soot and organic contaminants, it can be removed even by an easy washing method such as rainwater, which can greatly reduce the time and expense required for the maintenance of urban aesthetics.

Claims (12)

A resin having adhesion to a predetermined coating material, comprising: a gas resin containing at least one of a polyester polyol resin, a thermosetting acrylic resin, a thermoplastic acrylic resin, and a modified silicone resin, A crosslinking agent for curing the base resin, A photocatalyst comprising titanium dioxide (TiO ₂ ) for self cleaning, Polydimethylsiloxane including a functional group for bonding with the crosslinking agent, to prevent the adhesion of the deposit; Easy cleaning paint composition comprising a ultraviolet absorber for preventing discoloration and discoloration. In claim 1, Coating composition for easy cleaning, characterized in that the crosslinking agent for curing the gas resin is hexamethylene diisocyanate. delete In claim 1, When the base resin is a polyester polyol resin, the coating composition for easy cleaning, characterized in that it comprises 20 to 60 parts by weight in 100 parts by weight of the total coating. delete In claim 1, The titanium dioxide coating composition for easy cleaning, characterized in that 0.5 to 10 parts by weight in 100 parts by weight of the total paint. In claim 1, The titanium dioxide coating composition for easy cleaning, characterized in that the primary particle size is 10nm or less, the crystal phase is anatase type, purity is 99.5% or more. delete In claim 2, The polydimethylsiloxane coating composition for easy cleaning, characterized in that it comprises a hydroxyl group as a functional group for bonding with the crosslinking agent. The method of claim 1 or 2, The polydimethylsiloxane coating composition for easy cleaning, characterized in that it comprises 1 to 10 parts by weight in 100 parts by weight of the total paint. In claim 9, The active ingredient content of the hydroxy group contained in the polydimethylsiloxane is 1 to 10 parts by weight based on the total weight of the polydimethylsiloxane paint composition for easy cleaning. In claim 1, The UV absorber paint composition for easy cleaning, characterized in that it comprises 1 to 3 parts by weight of HPT (Hydroxyphenyl-triazine) -based and 1-3 parts by weight of HLS (Hindered amine light stablizer) based on 100 parts by weight of the paint.