KR20100078159A - Coating composition for vibration damping and process for preparing the same - Google Patents

Abstract

PURPOSE: A vibration damping coating composition is provided to obtain excellent corrosion resistance, sound absorption performance, and vibration damping performance, to have low toxicity and superior flame retardant property, and to be environment-friendly used. CONSTITUTION: A method for manufacturing a vibration damping coating composition comprises the following steps: uniformly mixing materials after putting a liquid resin into a container and adding a water-soluble polymer dispersing agent; adding aides including a liquidity controller, a precipitation inhibitor, a corrosion inhibitor, an antimicrobial agent, and an antifoaming agent to the mixture and uniformly mixing the mixture; adding an anti-corrosive pigment, a coloring pigment, and a hollow pigment and mixing the mixture; adjusting the viscosity by adding a viscosity modifier to the mixture and uniformly mixing the mixture.

Description

Vibration-proof coating composition and its manufacturing method {COATING COMPOSITION FOR VIBRATION DAMPING AND PROCESS FOR PREPARING THE SAME}

The present invention relates to an anti-vibration coating composition, it is excellent in workability and relates to a low-toxic environmentally-friendly vibration damping coating composition having a vibration damping, flame-retardant, sound-absorbing performance for quick-dry railroad car coating, and a method of manufacturing the same.

Conventional ash-based paints include oil-based (asphalt-based) and water-based (emulsion-based), but oil-based oils have excellent drying workability, but have a high specific gravity and thixotropic properties, resulting in poor airless spray workability. Because of the vertical coating, it is painted on railroad cars, and the film thickness is not applied uniformly. Therefore, the construction time is long, so the air is delayed, and environmental harmful substances are discharged during the drying process. Adhesion is not constant and also does not have a uniform anticorrosive force according to the steel material, the drying time is long, delays the process time, the one-time construction range (0.5 mm or less) is low, you need to work repeatedly a few times (air 2 ~ 3 days), etc. was restricted to paint application.

In addition, according to the requirements, if the properties such as heat insulation, sound absorption, flame retardant, earthquake, etc. at the same time requires only one or two properties have a problem that must be installed separately.

Therefore, there is a need for a study on the development of a vibration damping coating composition that can be applied effectively with excellent coating properties and workability even if various functionalities are simultaneously provided.

The present invention solves the problems of the prior art as described above, while providing corrosion resistance, sound absorption performance, vibration damping performance, etc. at the same time to provide an excellent vibration damping coating composition in terms of low toxicity, flame retardancy.

The present invention also provides a method for producing the vibration damping coating composition.

The present invention is an aqueous resin emulsion having a polar group, comprising an aqueous silicone resin and a non-halogenated compound modified resin, a hollow pigment, a dispersant, and a flow control agent, 0.1 to 5% by weight and flowability of the dispersant relative to the total weight of the total composition It provides a vibration damping coating composition comprising 0.1 to 5% by weight of the regulator.

The present invention also comprises the steps of: a) putting a liquid resin in a container, adding a water-soluble polymer dispersant and mixing until homogeneous with a disperser, b) a flow regulator, a sedimentation inhibitor, a corrosion inhibitor in the mixture of step a) , Adding an antimicrobial agent and antifoaming agent, stirring and mixing until uniform, c) adding anti-rust pigments, coloring pigments, sieving pigments and hollow pigments to the mixture of step b) to be uniform. It provides a method of producing a vibration damping coating composition comprising the steps of mixing until, and d) adding a viscosity modifier to the mixture of step c) to adjust the viscosity and to uniformly mix.

Hereinafter, the present invention will be described in more detail.

The present invention relates to a low-toxic and flame-retardant environmentally friendly dust-proof coating composition that can be applied to the interior and exterior of railway vehicles, such as electric cars, in one construction as an aqueous coating applied to vehicles by means of vibration damping and soundproofing of railway vehicles. Moreover, when a thick coating film is formed, it is related with the coating composition excellent in workability, and its manufacturing method.

Particularly, the vibration damping coating composition of the present invention is an aqueous vibration damping coating composition comprising an aqueous acrylic resin, a water-soluble silicone resin, a hollow pigment, an rust preventive pigment, a dispersant, an antifoaming agent, water, and an adhesion promoter. It is characterized by consisting of environmentally friendly materials that do not emit environmentally harmful substances even after the process and drying. In addition, despite being composed of environmentally friendly materials, the drying speed is not slower than that of petroleum-based damping paints. In addition, it can be in close contact with various steel and non-ferrous materials to provide corrosion resistance, while providing low toxicity, heat insulation, flame retardant, sound absorption, and vibration damping performance at the same time, and saving weight due to the design of weight reduction due to paint, and thereby environment. It can also contribute to reducing hazardous emissions.

Such a vibration damping coating composition of the present invention is an aqueous resin emulsion having a polar group, and includes an aqueous silicone resin and a non-halogenated compound-modified resin, a hollow pigment, a dispersant, and a flow control agent, and the dispersant is 0.1 to the total weight of the whole composition. To 5 weight percent and 0.1 to 5 weight percent flow control agent.

The content of the dispersant and the fluidity regulator may be adjusted based on strain and stress curves by rheometer. In particular, as shown in the standard graph as shown in Figure 1 can be determined by the range of the flowable sprayable content can be obtained, the desired range of the content of the fluidity regulator, the content close to the standard calibration curve as shown in Figure 2 can be obtained.

In particular, the graph of Figure 1, in the paint composition, having a viscosity of 60,000 or more during storage to maintain the stability of the storage of the paint, at a viscosity of 80,000 or less to the viscosity that can be sprayed when shear stress (Shear) of the airless spray is applied It is possible to select fluidity regulators and their content ranges which may have the ideal pseudo plastic properties falling.

In the present invention, the aqueous silicone resin has a glass transition temperature of 0 to 10 ° C., and has at least one ureido bond to form a coating film having a hydrogen bond formed by contact with a material with a polar component and a hydrogen bonding performance. It has excellent adhesion.

In addition, the non-halogenated compound modified resin which gives low toxicity flame retardance together with the said aqueous silicone resin is used as a binder.

In particular, the present invention is an aqueous styrene acrylic resin emulsion having a glass transition temperature in the range of 0 to 10 ° C. and having one or more hydrogen bonds as a main base, an aqueous dispersion acrylic, A water-soluble polymer that can be stabilized by dispersing low specific gravity and high specific gravity pigments in the resin component by using a phosphorus compound resin among non-halogenated compound modified resins that have ureido bonds and excellent adhesion and low toxicity and flame retardancy. Dispersants, hollow hollow vaccums, aqueous rust preventive pigments, low toxic pigments, and extender pigments, flow control agents to adjust the flowability of paints, sedimentation inhibitors to control storage during storage, corrosion inhibitors to prevent container corrosion on storage, paints It contains antibacterial and water that confers antimicrobial properties and does not contain ester alcohol or The environmentally friendly coating composition whose content is 1.0 weight% or less can be provided.

In a preferred embodiment of the present invention, the damping coating composition is composed of an aqueous styrene acrylic resin emulsion and a water-dispersible acrylic resin, an aqueous silicone resin having a ureido bond, a phosphorus resin, a hollow pigment, an rust preventive pigment, a coloring pigment and a extender pigment. One or more selected from the group may include water-soluble polymer dispersants, rheology control agents, sedimentation inhibitors, preservatives, antibacterial agents, ester alcohols, and water.

In another preferred embodiment of the present invention, the damping coating composition is based on the total weight of the total composition, the aqueous styrene acrylic resin emulsion and water dispersion acrylic resin 10 to 30% by weight, the aqueous silicone resin having a ureido bond 1 to 10 1% by weight, phosphorus resin 1-10% by weight, hollow pigment 20-50% by weight, rust preventive pigment 1-10% by weight, at least one 10-30% by weight selected from the group consisting of colored pigments and extender pigments, water-soluble polymer dispersant 0.1 to 5% by weight, flow control agent 0.1 to 5% by weight, sedimentation inhibitor 1 to 10% by weight, corrosion inhibitor 0.1 to 5% by weight, antibacterial 0.1 to 5% by weight, ester alcohol 0.1 to 1.0% by weight, and the remaining amount of water It may include.

In addition, the anti-vibration coating composition may further include one or more selected from the group consisting of antifoaming agents, surface conditioners, surface spreading aids, rust preventive and adhesion promoters, pH regulators, and combinations thereof as necessary. In this case, the additive may be included in 0.1 to 10% by weight, preferably 0.1 to 5% by weight relative to the total weight of the composition.

The vibration damping coating composition may further include one or more inorganic fillers selected from the group consisting of mica, talc, flake silica and hollow silica, as necessary. The inorganic filler may include 10 to 30% by weight, preferably 25 to 30% by weight based on the total weight of the composition.

The eco-friendly aqueous dustproof coating composition according to the present invention is surrounded by a water-soluble polymer dispersant having a cationic group and a nonionic component to prevent the hollow pigment of low specific gravity, which is hollowed out by vacuum, on the surface of the hollow pigment paint. Stabilization in the system prevents surface flotation during storage for long periods of time. In addition, the drying process is evenly distributed in the system of the coating film so that the vibration damping performance is uniform.

Accordingly, the specific gravity of the vibration damping coating composition of the present invention may be 0.7 to 1.0, preferably 0.7 to 0.9, more preferably 0.7 to 0.8, and when the specific gravity is high, the paint may flow down in one thick dimension. It is preferable to maintain the specific gravity range in view of obtaining a thick dimension in one construction because of the number. In addition, the light weight of the paint can be provided as an environmentally friendly water-based damping paint that contributes to the reduction of the total weight of the vehicle to obtain fuel savings.

The eco-friendly aqueous dustproof coating composition of the present invention increases the vibration damping performance by using an aqueous styrene acrylic resin emulsion and a water-dispersible acrylic resin, and by using an aqueous silicone resin having a ureido bond, adhesion to various iron and nonferrous materials. It is easy to use, and it gives flame retardancy to the final coating by using phosphorus modified resin, and makes uniform coating during work by using 1 ~ 10% of flowable additive, and rheometer at sag-meter over 20 and standard temperature (20 ~ 25 ℃) The dispersant and fluidity are adjusted to ensure that the strain and stress curves measured by the rheometer form a standard calibration curve to prevent the film from dripping during drying.

In addition, the eco-friendly aqueous reclaimed paint composition is an aqueous antirust pigment, low toxic pigments, and extender pigments, anti-settling agents to adjust the storage properties during storage, corrosion inhibitors to prevent container corrosion on storage, antibacterial agents and water to give antibacterial properties of the paint It includes.

First, the styrene acrylic resin emulsion and the water dispersible acrylic resin impart flexibility to the water-based vibration damping coating composition, and use a glass transition temperature of 0 ° C to 10 ° C. If the glass transition temperature is less than the above range, the vibration damping performance (loss modulus) is improved, but the coating film is too low, resulting in a problem of poor workability, and when the glass transition temperature is exceeded, the coating film becomes too strong and the vibration damping performance (loss modulus) is rapidly increased. Falls.

In addition, an aqueous styrene acrylic resin emulsion having one or more hydrogen bonds, a water dispersible acrylic resin, or the like improves the adhesion to the material and the miscibility with the pigment.

Such styrene acrylic resin emulsion may comprise 10 to 30% by weight, preferably 20 to 25% by weight in the total coating composition.

Aqueous silicone resins having ureido bonds increase adhesion with various ferrous nonferrous materials. In addition, the miscibility with the styrene acrylic resin emulsion should be good, and if the miscibility is poor, the gelling occurs in the paint state and the surface of the coating film becomes soft. The aqueous silicone resin having such a ureido bond may comprise 1 to 10% by weight, preferably 1 to 5% by weight in the total coating composition.

Aqueous phosphorus-based modified resins impart low toxicity and flame retardancy to the final coating film, and if a large amount is used, the coating film becomes too flexible, and if a small amount is used, the flame retardancy of the final film is inferior. As the non-halogenated compound-modified resin, the aqueous phosphorus-based resin may include 1 to 10% by weight, preferably 1 to 5% by weight of the total coating composition.

In particular, the aqueous phosphorus-based modified resin corresponds to a low toxicity flame retardant as a non-halogenated material, it can provide an environmentally friendly coating composition.

Since the hollow pigment affects insulation, sound absorption and vibration damping, it is very important to control the content in the coating composition. In the present invention, the hollow pigment in the vacuum may be included in an amount of 20 to 50% by weight, preferably 25 to 40% by weight in the total coating composition. If the content of the hollow pigment is less than the above range, sufficient heat insulation, sound absorption and vibration damping effects may not be obtained. If the content exceeds the above range, dispersion and stability of the coating composition may be reduced.

At this time, the hollow pigment is preferably a diameter of 10 to 200㎛, the size of the finer range may be 50 to 150㎛. If the size of the particles is less than or above the above range, sufficient heat insulation, sound absorption and vibration damping effects cannot be obtained, and the dispersion stability of the coating composition and the appearance of the final coating film may be deteriorated.

In particular, the aqueous vibration damping coating composition according to the present invention can improve the heat insulation, sound absorption, vibration damping performance and adhesion to the applied material by appropriately using an aqueous silicone resin having a ureido bond with the vacuum hollow pigment.

The water-soluble polymer dispersant may have a carboxyl group or an amine anchoring group. The water-soluble polymer dispersant may be one selected from the group consisting of alkylammonium salts of block copolymers having acidic functional groups, polymer block polymer solutions having pigment affinity functional groups, and phosphate ester salts of polymer block copolymers having pigment affinity functional groups. Do. Commercially available products include BYK 154 ^® , BYK 155 ^® , BYK 190 ^® , BYK 192 ^® , BYK 194 ^® , BYK 180 ^® , BYK 182 ^® , EFKA4580 ^® , EFKA 5071 ^® , EFKA 6220 ^® , EFKA 6230 ^® , EFKA 4550 ^® , TEGO 750W ^® , tetramethyldecynediol (air product, trade name: sufinyn 104 ^® or supinol TG ^® ), 2amino2methyl1propanol, and mixtures thereof One kind is possible. Such a water-soluble polymer dispersant may be included in an amount of 0.1 to 5% by weight, preferably 0.1 to 3% by weight in the total coating composition. If the content is less than the above range may be a problem of storage properties due to the lack of components for coating the public pigment, if the content exceeds the above range may cause a problem that the paint properties lack chemical and rust resistance.

In addition, the water-based vibration damping coating composition according to the present invention may include a fluidity regulator. As described above, the hollow pigments have a specific gravity of 0.2 to 0.5, and are light, and the other pigments are heavy, so that the pigments float or precipitate during storage of the paint, resulting in poor physical properties or poor workability of the coating composition. In order to prevent the floating or precipitation of these pigments, fluidity regulators are used, and fume silica, organocrane, bentonite aerogel 300 ^® , bentonite aerogel 972 ^® , creton ^® , benton 27 ^® , benton 34 ^® and benton 38 1-2 species selected from the group consisting of ^® , Benton EW, SD-2 ^® , and mixtures thereof. The flow control agent may be included in an amount of 0.1 to 10% by weight, preferably 2 to 7% by weight in the total coating composition. If the content is less than the above range, it may be difficult to suppress the floating and precipitation of the pigment, and if it exceeds the above range, since the physical properties of the final coating film is lowered, it is preferable to use within the above range.

On the other hand, the water-based anti-vibration coating composition of the present invention may include one pigment selected from the group consisting of rust preventive pigments, low toxicity pigments, coloring and extender pigments and mixtures thereof.

The rust preventive pigment is one selected from the group consisting of zinc chromate, zinc tetraoxyl chromate, zinc trioxyl chromate, strolium chromate and mixtures thereof, and the low toxicity pigment is zinc oxide, modified aluminum triphosphate, zinc phosphate, aluminum modified Phosphate phosphate, molybdate modified phosphate and one selected from the group consisting of mixtures, the coloring and sieving pigments are zinc oxide, titania, carbon black, barium sulfate, calcium carbonate, mica, talc and mixtures thereof One species selected from the group is possible. Such pigments may be appropriately selected by those of ordinary skill in the art depending on the intended use of the aqueous vibration damping coating composition of the present invention. The pigment may comprise 5 to 40% by weight, preferably 10 to 30% by weight of the total coating composition. More specifically, the soluble rust preventive pigment may be used in an amount of 1 to 10% by weight, 2 to 10% by weight of the low toxicity pigment, and 2 to 10% by weight of the coloring and sieving pigment. If the content is less than the above range may be a problem that the rust resistance and drying is delayed, and if the above content is exceeded may cause a problem of lack of mechanical properties and material adhesion.

The co-solvent may be mixed with water, which is a solvent, and affects paint workability such as paint spreadability and dryness and paint property such as freezing of paint. The co-solvent may be one selected from the group consisting of ethers and mixtures thereof having an evaporation boiling point of 100 to 300 ° C. Ethylene glycol monomethyl ether (methyl cellosolve), ethylene glycol monoethyl ether (ethyl cellosolve), ethylene glycol monoethyl ether acetel (cellosolve acetate), ethylene glycol monobutyl ether (butyl cellosolve), di Ethylene glycol monobutyl ether, propylene glycol monomethyl ether, diacetone alcohol, diethylene glycol butylether acetate, propylene glycol methylether acetate, ethylene glycol butylether acetate, 3-methyl 3-methoxybutanol and mixtures thereof One kind selected from the group consisting of one ether selected from the group and mixed solvents thereof is possible. The co-solvent may be included in an amount of 1 to 10% by weight, preferably 2 to 5% by weight in the total coating composition. If the content is less than the above range, there is a problem in the workability and freeze storage of the paint, and if it exceeds the above range, an environmental problem occurs due to volatilization of the organic solvent.

Water is a solvent of the composition described above, dissolves the resin during the preparation of the paint, improves the dispersion of the pigment, and imparts viscosity control, shelf life and formation temperature of the minimum coating film. In addition, it creates the expected surface condition, imparts suitable properties to the coating equipment during painting, and contributes to the volatilization of the solvent.

As described above, in one preferred embodiment, the water-based vibration damping coating composition according to the present invention uses an aqueous styrene acrylic resin emulsion, an aqueous silicone resin, an aqueous phosphorus modified resin as a binder, a water-soluble polymer dispersant, a hollow pigment vacated by vacuum, Aqueous antirust pigments, low toxic pigments, and extender pigments, flow control agents to adjust the flowability of paints, sedimentation inhibitors to adjust storage properties during storage, corrosion inhibitors to prevent container corrosion on storage, antibacterial and water to give antimicrobial properties of paints It may include.

The surface modifiers and surface spreading aids are those known in the art to prevent spreading, foaming, surface conditioning and cratering. The surface modifier may be one selected from the group consisting of reactive silicones, silicone surfactants and polyacrylates. Typical BYK 345 ^® , BYK 347 ^® , BYK 346 ^® , BYK 340 ^® , BYK 333 ^® , TEGO wet245 ^® , TEGO wet 265 ^® , TEGO 410 ^® , EFKA 3522 ^® , EFKA 3570 ^® , EFKA 3580 ^® , EFKA 3772 ^® And one selected from the group consisting of a combination thereof. The content of the surface modifier and surface spreading aid is used in the usual additive level, 0 to 5% by weight of the total coating composition.

The damping coating composition of the present invention as described above can solve all the problems of the existing damping coating, and in particular, was developed in order to give more various physical properties applied to the inside and outside of a railway vehicle, such as electric cars, various It adheres to the panel of non-ferrous metals to provide corrosion resistance. Secondly, it provides insulation, sound absorption, vibration damping, etc. at the same time, and has low toxicity and flame retardant properties. To provide a safe and comfortable environment. Moreover, the present invention can prevent the phenomenon of causing severe noise pollution around the railway due to the resonance of the steel and non-ferrous metal parts due to the vibration of the vehicle body when the vehicle is driven based on this feature. . As described above, the coating composition of the present invention can obtain a thick dimension in a single construction, and can also be provided as an environmentally-friendly water-based vibration damping coating which can contribute to weight reduction of the vehicle due to light weight of the paint and can save fuel.

On the other hand, the present invention provides a method for producing the vibration damping coating composition. The manufacturing method comprises the steps of: a) putting a liquid resin in a container, adding a water-soluble polymer dispersant and mixing until homogeneous with a disperser, b) a fluidity regulator, a sedimentation inhibitor, a corrosion inhibitor, Adding an antimicrobial agent and antifoaming agent and stirring until mixing to become uniform; c) adding rust preventive pigments, coloring pigments, extender pigments and hollow pigments to the mixture of step b) until stirring Mixing, and d) adding a viscosity modifier to the mixture of step c) to adjust the viscosity and to mix uniformly.

In addition, the method of manufacturing the vibration damping coating composition may further include a step of removing air bubbles generated during the production of the vibration damping paint under low pressure to remove the factors that may inhibit the rust preventive property due to pores in the dry coating film during construction. .

In a specific embodiment of the present invention, in step a), a water-soluble polymer dispersant is added to the container in an aqueous styrene acrylic resin emulsion and mixed uniformly. At this time, the mixing is performed for 5 to 20 minutes at 300 to 500 rpm, so as not to exceed 800 rpm.

Next, to prepare a mixture of the fluidity regulator, sedimentation inhibitors, corrosion inhibitors, antibacterial agents and antifoaming agent to the mixture of the above step and mixed until high-speed stirring to become uniform. At this time, the mixing is performed for 5 to 20 minutes at 300 to 500 rpm, so as not to exceed 800 rpm.

Next, the rust preventive pigments, coloring pigments, sieving pigments and hollow pigments are added to the mixture of the above step, and the mixture is prepared by stirring until medium speed uniformity. At this time, the mixing is performed in a twin screw vacuum chamber to prepare an aqueous vibration damping coating composition.

At this time, if necessary, an additive such as a viscosity modifier is added to a predetermined content, and is performed at 200 to 300 rpm for 10 minutes to 1 hour.

As a result, the prepared aqueous vibration damping coating composition may have a viscosity of 60000 to 80000 cps, preferably 65000 to 75000 cps, and a pH of 8 to 10, preferably 8.5 to 9, measured by a CPS viscometer. .

The water-based anti-vibration coating composition prepared in this way is excellent in corrosion resistance by being in close contact with ferrous and non-ferrous metals, and is preferably applied as a coating film to impart insulation, sound absorption, and vibration damping performance to the applied material.

The paint composition of the conventional repainted paint is an oil-based system is excellent in workability, but the one-time construction time is long, the air is delayed, the environmental harmful substances are discharged during the drying process, in the case of water, the adhesion to various steel is constant It does not have a uniform anticorrosive force according to the material and delays the process time due to the long drying time, and solves the problem of having to work several times repeatedly due to the low construction range. It improves the adhesion according to the material, which is a disadvantage of the conventional water-based anti-vibration paint, and can obtain excellent anticorrosive performance with high adhesion to various steels and nonferrous materials. High (more than 700 μm). In addition, it is easy to store for a long time by improving the storage stability, which is the biggest disadvantage of the conventional water-based anti-vibration paint, and in particular, a uniform coating film can be obtained with even spraying work on the vertical surface, and ultimately high insulation and sound-absorbing vibration damping performance It can be applied to the vehicle's applied materials.

In the present invention, matters other than those described above can be added or subtracted as required, and therefore, the present invention is not particularly limited thereto.

The coating composition is environmentally friendly because drying time is faster and no harmful substances are discharged compared to conventional oil-based or aqueous, and it is possible to obtain excellent anticorrosive performance with high adhesion to various steels and non-ferrous materials. The range that can be applied to is high (700 µm or more). In addition, it is easy to store for a long period of time by improving storage stability, and in particular, a uniform coating can be obtained with even spraying work on the vertical surface, and ultimately, high insulation, sound absorption and vibration damping performance and low toxicity can be effectively applied to railroad vehicles' applied materials. Can be.

Hereinafter, the present invention will be described in more detail with reference to the following examples. However, the scope of the present invention is not limited to the following examples.

Examples 1-4 and Comparative Examples 1-2

An aqueous coating composition was prepared in a composition as shown in Table 1 below.

First, an aqueous resin and a water-soluble polymer dispersant were added to the vessel, followed by stirring at a speed of 400 rpm for 10 minutes with a disper.

To the resin mixture was added a flow control agent, sedimentation inhibitors, corrosion inhibitors, antibacterial agents and antifoaming agents and mixed for 30 minutes at a high speed of 400 rpm until homogeneous, mixed with rust preventive pigments, pigmented pigments , Sieving pigments and hollow pigments were added and stirred at high speed at 200 rpm for 1 hour, and mixed until they were also uniform. When uniformly mixed, a viscosity modifier was added to the mixture, and the mixture was stirred at 200 rpm for 20 minutes, and degassed by applying a vacuum at 0.4 atmosphere of 40% of 1 atmosphere.

No Raw material name Example
One Example
2 Example
3 Example
4 Comparative example
One Comparative example
2 One Acrylic Emulsion 1 45.0 - - - - - 2 Acrylic Emulsion 2 - 45.0 - - - - 3 Acrylic Emulsion 3 - - 45.0 - - - 4 Polyurethane Dispersion - - - 45.0 - - 5 Silane-Modified Acrylic Urethane Dispersion - - - - 46.5 6 Silane-Modified Acrylic Urethane Dispersion - - - - - 46.5 7 Aqueous silicone resin 1.5 1.5 1.5 1.5 - - 8 Aqueous phosphorus modified resin 3.0 3.0 3.0 3.0 3.0 3.0 9 Water Soluble Polymer Dispersant 0.3 0.3 0.3 0.3 0.3 0.3 10 Solvent 1.0 1.0 1.0 1.0 1.0 1.0 11 Surface Spreading Preparation 0.2 0.2 0.2 0.2 0.2 0.2 12 Corrosion inhibitor 2.0 2.0 2.0 2.0 2.0 2.0 13 Surface conditioner 0.7 0.7 0.7 0.7 0.7 0.7 14 Antibacterial agents 0.5 0.5 0.5 0.5 0.5 0.5 15 White pigment 2.0 2.0 2.0 2.0 2.0 2.0 16 Black pigment 1.0 1.0 1.0 1.0 1.0 1.0 17 Antirust pigment 4.0 4.0 4.0 4.0 4.0 4.0 18 Sedimentation inhibitors 10.0 10.0 10.0 10.0 10.0 10.0 19 Hollow pigment 28.0 28.0 28.0 28.0 28.0 28.0 20 Rheology modifier 0.6 0.6 0.6 0.6 0.6 0.6 21 Distilled water 0.2 0.2 0.2 0.2 0.2 0.2 Sum 100.0 100.0 100.0 100.0 100.0 100.0 Note 1)
1.Aqueous acrylic emulsion: Tg 20 ~ 30 ℃, Jonson Polymer
2. Aqueous acrylic emulsion: Tg -20 ~ -10 ℃, Daewon high-tech products
3. Aqueous acrylic emulsion: Tg 0 ~ 10 ℃, BASF products
4. Aqueous water dispersion acrylic resin: its own synthetic resin
5. Aqueous water dispersion silane modified acrylic resin: Nano tech products
6. Aqueous water dispersion silane modified acrylic resin: Nano tech products
7. Aqueous ureido modified silicone resin: chrome tone product
8. Aqueous Phosphorus Modified Resin: Dain Chem Products
9. Water-soluble high molecular weight dispersant: high molecular weight block copolymer with functional group, manufactured by BYK-154, BYK
10. Solvents: Ethylene Glycol, Dongrak Chemicals
11. Surface spreading aid: polyether modified polydimethylsiloxane solution, BYK products
12. Preservatives: Donghwa Chemtech
13. Surface modifier: polyether modified siloxane, BYK products
14. Anticorrosive: Product of Asung Fine Chemical Co., Ltd.
15,16. Color Pigment: TiO ₂ + Carbon black (2: 1)
17. Antirust pigment: ZINC PHOSPHATE, Hanchang Industrial Products
18. Sedimentation inhibitors: fume silica + bentonite (2: 1) from Degussa, C & A Industries
19. Hollow pigment: 50 ~ 150 ㎛, E-spheres
20. Fluid regulator: Polymeric urethane thickener, SUD product

Experimental Example 1

In order to measure the physical properties of the coating composition prepared in Examples 1 to 4 and Comparative Examples 1 and 2 were carried out as follows to prepare a test piece.

After cold rolled steel sheet (KS D 3512) and mechanical sanding 220 necks were sprayed by airless spray 650 ~ 700 ㎛ and dried for 3 days at room temperature (20 ~ 25 ℃).

A: Nonvolatile matter (%)

After the sample was taken, the initial sample weight was measured, followed by hot air drying at 105 ° C. for 3 hours, and the weight of volatile matter relative to the initial sample weight was calculated based on Equation 1 below.

[Equation 1]

Nonvolatile matter (%) = ((Initial sample weight-weight of volatile) / Initial sample weight) × 100

B: viscosity (CPS)

Measurement was made using a Brookfield viscometer at 25 ° C.

C: Painting workability (spray coating state)

The dry coating thickness was coated with a thickness of 650 to 700 µm and visually compared to obtain an even coating thickness on the vertical plane, and then divided into three stages of good (○), good (△), and bad (×).

D: adhesive

According to the cross-cut test method of ASTM D 3359, cuts were cut with a sheath on cold rolled sheet, stainless steel, and aluminum specimens and adhered with cellophane tape so that the scratched portions were evenly attached. Next, the peeling state of the coating film of the site | part where the cellophane tape was peeled off and a scratch was compared visually, and it divided and evaluated as follows.

(Circle): No peeling.

(Triangle | delta): 50% or more of coating film remainder.

X: 50% or less coating film remaining.

E: Impact Resistance (Dupont, 1/2 "* 500g * 30)

Dupont impact tester was used to measure the cracks on the specimens produced in the size of 1/2 "× 500g × 30㎝, and according to the crack condition, there were three stages of good (○), good (△) and bad (×). Judgment was made separately.

F: salt spray

Specimens made according to ASTM B117 were made with X-shaped lines according to method 2 (scraping method) of ASTM D1654. Subsequently, according to KS D 9502, a 5% NaCl aqueous solution was exposed to a salt spray machine sprayed at 35 ° C. to expose the time, and the state of the coating film was examined.

○: 1 mm or less on one side.

(Triangle | delta): 1-2 mm.

X: 2 mm or more.

G: hypotonic

Each paint composition was stored at 60 ° C. for 1 month, and then the storage condition of the paint composition was checked to see whether the floating of the hollow pigment and the hard precipitate occurred:

○: no injury or deposits at all.

△: slight injury or precipitate

X: A large amount of injuries or precipitates occurred.

H: Fire performance test

According to BS 6853, the specimens were burned according to the fire performance test method for dry coating, and then flame propagation distance, smoke density, toxicity, and measured were classified into Class 1, 2 and 3 stages.

I: vibration damping performance test

In accordance with ISO 6721-3, loss coefficients were measured using elastic and viscous values with a Dynamic Mechanical Analyzer (DMA) instrument.

The measurement results of the physical properties as described above for the specimens prepared from Examples 1 to 4 and Comparative Examples 1 to 2 are shown in Table 2 below.

division Example
One Example
2 Example
3 Example
4 Comparative example
One Comparative example
2 Nonvolatile matter (%) 67 63 66 63 68 68 Viscosity
(CPS 25 ℃, Brookfield Viscometer) 60000 80000 60000 70000 60000 60000 Painting workability ○ ○ ○ ○ ○ ○ Adhesive ○ ○ ○ ○ △ △ Impact resistance
(Dupont, 1/2 "* 500g * 30) △ △ ○ × △ △ Salt spray ○ ○ ○ ○ ○ ○ Zhejiang ○ ○ ○ ○ ○ ○ Fire performance ○ ○ ○ ○ ○ ○ Dustproofing Performance △ ○ △ △ △ △

Examples 5 to 13

To the composition as shown in Table 3, to carry out the same method as in Example 1 to prepare a coating composition.

No Raw material name Example
6 Example
7 Example
8 Example
9 Example
10 Example
11 Example
12 Example
13 One Acrylic emulsion 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 2 Aqueous silicone
Suzy 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 3 Aqueous phosphorus modified resin 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 4 Water Soluble Polymer Dispersant 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 5 Solvent 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 6 Surface Spreading Preparation 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 7 Corrosion inhibitor 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 8 Surface conditioner 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 9 Antibacterial agents 0.5 0.5 0.5 0.5 0.5 0.7 0.7 0.7 10 White pigment 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 11 Black pigment 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 12 Antirust pigment 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 13 Sedimentation inhibitors 10.0 10.0 10.0 10.0 10.0 4.0 4.0 4.0 14 Hollow pigment 28.0 28.0 28.0 28.0 28.0 4.0 4.0 4.0 15 Rheology modifier 0.6 0.6 0.6 0.6 0.6 4.0 4.0 4.0 16 Distilled water 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 Sum 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 Note 2)
1.Aqueous acrylic emulsion: Tg 0 ~ 10 ℃, BASF product
2. Aqueous ureido modified silicone resin: chrome tone product
3. Aqueous Phosphorus Modified Resin: Dain Chem Products
4. Water-soluble high molecular weight dispersant: high molecular weight block copolymer with functional group
5. Solvent: Ethylene Glycol, Dongrak Chemicals
6. Surface spreading aid: polyether modified polydimethylsiloxane, BYK products
7. Preservative: Donghwa Chemtech
8. Surface modifier: polyether modified siloxane, BYK products
9. Preservative: Product of Asung Fine Chemical Co., Ltd.
10,11. Color Pigment: TiO ₂ + Carbon black (2: 1)
12. Antirust Pigment: ZINC PHOSPHATE, Hanchang Industrial Products
13. Sedimentation inhibitor: fume silica + bentonite (2: 1) Degussa, C & A Industries
14. Hollow pigment: 50 ~ 150 ㎛, E-spheres
15. Fluid regulator: Polymeric urethane thickener, SUD product

In preparing the coating compositions of Examples 5 to 13, the adhesion test results for various materials according to the selection of each more specific modified silicone resin are shown in Table 3a below.

In addition, the compatibility test results with the resin which is a measure of the storage stability during storage of the anti-vibration paint according to the selection of the water-soluble polymer dispersant and the stability test results in the actual storage experiment are shown in Table 3b below, and the storage according to the selection of the anti-settling agent The stability and thickening performance test results are as shown in Table 3c, and the damping performance test results according to the selection of hollow pigments are as shown in Table 3d below.

Example No. Silane CRS SUS Al 5,8,11 A-187 ◎ Δ Ο 6,9,12 A-11542 ◎ Δ Ο 7,10,13 A-1524 Ο Ο ◎

 Example No. Dispersant
(Dispersion Agent) Compatibility stability Hypotability (60 ℃ Χ 15 days) 5 SN 5027 Ο Δ Χ 6 Surfynol-104 Ο Δ Χ 7 Tego 750 W Δ Δ Χ 8 OP-10 Χ Χ Χ 9 BYK-154 Ο Ο Ο 10 BYK-181 Δ Δ Χ 11 BYK-194 Δ Δ Χ 12 EFKA-4560 Ο Δ Χ 13 EFKA-4590 Δ Δ Χ

Example No. Rheology modifier Compatibility Thickening effect Storage stability
(Layer separation) manufacturer 5 Aerosil-972 Ο Δ Χ Degussa 6 Tixogel MP Ο Χ Χ Sud 7 Bentone LT Ο Ο Δ Dongwha Corporation 8 H-400 Ο ◎ Χ Sud 9 Natrazol Ο ◎ Χ Xenochem 10 AQ-600 Ο Δ Χ Sud 11 Bentone EW Ο Ο Ο C & A Industries

Example No. Hollow pigment Microns Main Components of Hollow Pigments Dustproofing Performance manufacturer 5, 11 E-Spheres
SL-125 125 Alumino silicate ◎ Enviro-spheres 6 E-Spheres
SLG 300 Alumino silicate Δ Enviro-spheres 7 E-Spheres
SL-75 75 Alumino silicate Δ Enviro-spheres 8 3CB
80 80 Calcium carbonate Δ Toyo-science 9, 12 3CB
120 120 Calcium carbonate Ο Toyo-science 10, 13 Hy-
Microsphere 130 Ceramic microsphere Ο Hy-Techs

Experimental Example 2

The physical properties of the coating compositions prepared in Examples 5 to 13 were measured in the same manner as in Experimental Example 1, and the measurement results obtained are shown in Table 4 below.

division Example
5 Example
6 Example
7 Example
8 Example
9 Example
10 Example
11 Example
12 Example
13 Nonvolatile matter (%) 66 66 66 66 66 66 66 66 66 Viscosity (CPS 25 ℃, Brookfield Viscometer) 70000 60000 60000 80000 70000 80000 60000 70000 80000 Painting workability ○ ○ ○ ○ ○ ○ ○ ○ ○ Adhesive △ △ ○ △ △ ○ △ △ ○ Impact Resistance (Dupont, 1/2 "* 500g * 30) ○ ○ ○ ○ ○ ○ ○ ○ ○ Salt spray △ △ ○ △ △ ○ △ △ ○ Zhejiang Χ Χ Χ Χ ○ Χ Χ Χ Χ Fire performance ○ ○ ○ ○ ○ ○ ○ ○ ○ Dustproofing Performance ◎ △ △ △ ○ ○ ◎ ○ ○

With reference to Table 4, an aqueous vibration damping coating composition as shown in Table 5 below was prepared.

No Raw material name combination One Acrylic Emulsion 1 45.0 2 Aqueous silicone resin 1.5 3 Aqueous phosphorus modified resin 3.0 4 Water Soluble Polymer Dispersant 0.3 5 Solvent 1.0 6 Surface Spreading Preparation 0.2 7 Corrosion inhibitor 2.0 8 Surface conditioner 0.7 9 Antibacterial agents 0.5 10 White pigment 2.0 11 Black pigment 1.0 12 Antirust pigment 4.0 13 Sedimentation inhibitors 10.0 14 Hollow pigment 28.0 15 Rheology modifier 0.6 16 Distilled water 0.2 Sum 100.0 Note 3)
1.Aqueous acrylic emulsion: Tg 0 ~ 10 ℃, BASF product
2. Aqueous ureido modified silicone resin: chrome tone product
3. Aqueous Phosphorus Modified Resin: Dain Chem Products
4. Water-soluble high molecular weight dispersant: high molecular weight block copolymer with functional group, manufactured by BYK
5. Solvent: Ethylene Glycol, Dongrak Chemicals
6. Surface spreading aid: polyether modified polydimethylsiloxane, BYK products
7. Preservative: Donghwa Chemtech
8. Surface modifier: polyether modified siloxane, BYK products
9. Preservative: Product of Asung Fine Chemical Co., Ltd.
10,11. Color Pigment: TiO ₂ + Carbon black (2: 1)
12. Antirust Pigment: ZINC PHOSPHATE, Hanchang Industrial Products
13. Sedimentation inhibitor: fume silica + bentonite (2: 1) Degussa, C & A Industries
14. Hollow pigment: 50 ~ 150 ㎛, E-spheres
15. Fluid regulator: Polymeric urethane thickener, SUD product

Table 6 shows the results of measuring the final physical properties of the aqueous vibration damping coating composition prepared in the composition of Table 5, as described in Experimental Example 1.

division standard Example 5 Nonvolatile matter (%) 60-70 66 Viscosity (CPS 25 ℃, Brookfield Viscometer) 65,000-75,000 70000 Painting workability Airless spray Great Adhesive No peeling Bali Impact resistance Dupont, 1/2 "* 500g * 30cm or more 40 cm Salt spray 120 Great Zhejiang 60 ℃ X 1 month Good Fire performance BS Class 1 Class 1 Dustproofing Performance 0.1 or more 0.21

Among the most important fire performance and vibration suppression performances of Table 6, the fire performance was obtained type approval from Warrington Fire and Korea Railroad Research Institute of the Bodycote Testing group, an internationally recognized institution. The damping performance has been certified by Korea Research Institute of Standards and Science, the representative organization for national measurement standards.

According to the present invention, the water-based anti-vibration coating composition prepared by the method as described above is in close contact with the ferrous and non-ferrous metal material has excellent corrosion resistance, it can be applied as a coating film to impart insulation, sound absorption, vibration damping performance and low toxicity to the applied material.

The coating composition of the present invention is environmentally friendly because it has a faster drying time and does not discharge harmful substances than conventional oil-based or aqueous, and can obtain excellent anticorrosive performance with high adhesion to various steel and nonferrous materials, and with low specific gravity design. The range which can be constructed at one time is high (700 µm or more). In addition, it is easy to store for a long time by improving storage stability, and in particular, a uniform coating film can be obtained with uniform spraying workability on the vertical surface, and ultimately, high insulation, sound absorption and vibration damping performance and low toxicity can be applied to application materials of railway vehicles. have.

1 is a graph of the sprayable flowability in the vibration control paint composition according to an embodiment of the present invention.

Figure 2 is a standard calibration curve for the content control criteria of the dispersant and the fluidity regulator in the vibration control paint composition according to an embodiment of the present invention.

Claims (11)

An aqueous resin emulsion having a polar group, comprising an aqueous silicone resin and a non-halogenated compound modified resin, a hollow pigment, a dispersant, and a fluidity regulator, A dustproof coating composition comprising 0.1 to 5% by weight of the dispersant and 0.1 to 5% by weight of the flow control agent, based on the total weight of the total composition. The method of claim 1, Aqueous silicone resin is a vibration damping coating composition whose glass transition temperature is 0-10 degreeC. The method of claim 1, Wherein the aqueous silicone resin has at least one ureido bond. The method of claim 1, The specific gravity of the coating composition is 0.7 to 0.8 vibration damping coating composition. The method of claim 1, A damping coating composition using from 1 to 10% by weight of an aqueous phosphorus-based modified resin in a non-halogenated compound-modified resin. The method of claim 1, A dustproof coating composition further comprising at least one inorganic filler selected from the group consisting of mica, talc, flake silica and hollow silica. The method of claim 6, A dustproof coating composition comprising the inorganic filler in an amount of 10 to 30% by weight. The method of claim 1, An average particle diameter of the hollow pigment is 10 to 200 ㎛ dust-proof coating composition. The method of claim 1, A dustproof coating composition comprising 20 to 50% by weight of the hollow pigment. The method of claim 1, 10-30% by weight of aqueous styrene acrylic resin emulsion and water-dispersible acrylic resin, 1 to 10% by weight of an aqueous silicone resin having a ureido bond, Phosphorus-based resin 1 to 10% by weight, Hollow pigment 20 to 50% by weight, Rust preventive pigment 1 to 10% by weight, 10-30 wt% of one or more selected from the group consisting of colored pigments and extender pigments, 0.1-5% by weight of a water-soluble polymer dispersant, 0.1-5% by weight of flow control agent, 1 to 10% by weight of antisettling agent, Preservative 0.1 to 5% by weight, 0.1-5% by weight of antimicrobial agent, 0.1 to 1.0 weight percent of ester alcohol, and Remaining water A damping coating composition comprising a. a) placing a liquid resin in the container, adding a water-soluble polymer dispersant and mixing until uniform with a disperser, b) adding to the mixture of step a) a flow control agent, a sedimentation inhibitor, a corrosion inhibitor, an antibacterial agent and an antifoaming agent, and agitate until mixing to be uniform; c) adding rust preventive pigments, coloring pigments, extender pigments and hollow pigments to the mixture of step b) and stirring until uniform; d) adding a viscosity modifier to the mixture of step c) to adjust the viscosity and to mix uniformly.

Images