JP2002294164A - Water-base soundproof vibration-proofing coating material composition, method for forming coating film, and coated object - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a water-base soundproof vibration-proofing coating material composition which can give a soundproof vibration-proofing effect by a simple and easy method and can be obtained by using a powder coating material and a coating surplus recovered liquid coating material generated in a coating line, as the raw material of a coating material that reveals a soundproof vibration-proofing effect, to provide a method of forming a coating film, and a coated object. SOLUTION: The water-base soundproof vibration-proofing coating material composition contains an emulsion, a powder coating material and a coating surplus recovered liquid coating material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-based sound-insulating and vibration-proof coating composition which exhibits a sound-proof and vibration-proofing effect by reusing a powder coating and a surplus recovered liquid coating, a coating film forming method and a coated product.

[0002]

2. Description of the Related Art In a passenger car, it is desired that noise such as engine noise in an engine room and tire noise during traveling is not transmitted as much as possible in the vehicle, and that engine vibration is not transmitted as much as possible to the vehicle body. A method for preventing such noise and vibration with paint has been proposed. For example, JP-A-10-141434 discloses an emulsion containing a synthetic resin having a constant glass transition temperature as a main component, and an inorganic filler of 30 to 550 parts by mass with respect to 100 parts by mass of the solid content of the emulsion. A soundproofing material having a layer obtained by drying a coating material containing the coating and a porous layer is described. This has both sound absorbing properties, sound insulating properties, and vibration damping properties, and can also reduce air-borne noise and solid-borne noise.However, the means for obtaining the sound-proof and vibration-proof effect is complicated. However, it was not enough for the purpose of obtaining the effect simply and easily.

[0003] In the case of spray coating with a liquid paint, surplus spray dust is separated in a surplus paint separation tank of a spray booth or the like, and the separated surplus dust is discarded. On the other hand, in the case of powder paint, surplus spray dust is separated in a surplus paint collection tank of a spray booth or the like, and the separated surplus dust is similarly discarded. For these surplus dusts, resources are desired to be reused, and methods for solving the problems have been proposed. For example, Japanese Patent Application Laid-Open No. 7-48528 discloses that a coating waste fine powder composed of a thermosetting paint is less than 25 parts by weight with respect to 100 parts by weight of an acrylic emulsion paint, and a viscosity controlling solvent for obtaining a predetermined viscosity. And a chip-resistant coating composition comprising: In order to use fine paint waste powder, paint waste generated in the coating line is collected, pulverized while heating with a Henschel mixer, and ground to about 2000 μm or less. In addition, there is a problem that a man-hour is required for pre-treatment as a raw material of a coating material such as classification into fine powder having a particle size of 100 μm or less.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a powder coating material or a coating material generated in a coating line as a raw material of a coating material which can provide a soundproofing and vibration-proofing effect by a simple method and exhibit the soundproofing and vibration-proofing effect. An object of the present invention is to provide a water-based sound and vibration-proof and anti-vibration coating composition, a coating film forming method and a coated product obtained by using a surplus recovered liquid coating.

[0005]

Means for Solving the Problems The present inventors have conducted intensive studies in view of the above-mentioned problems, and as a result, have reached the present invention. 1. A water-based sound and vibration-proof paint composition containing an emulsion, a powder paint and a paint surplus recovered liquid paint. 2. For 100 parts by mass of the resin solid content of the emulsion,
The water-based soundproofing and vibration-proofing coating composition according to claim 1, comprising 10 to 80 parts by mass of the powder coating. 3. The above water-based soundproof and vibration-proof coating composition, wherein the powder paint is a paint surplus recovered powder paint. 4. For 100 parts by mass of the resin solid content of the emulsion,
The above-mentioned water-based soundproof and vibration-proof paint composition containing the paint surplus recovered liquid paint in an amount of 10 to 80 solids. 5. For 100 parts by mass of the resin solid content of the emulsion,
The above-mentioned water-based sound and vibration-proof coating composition further comprising 5 to 160 parts by mass of a hollow balloon. 6. For 100 parts by mass of the resin solid content of the emulsion,
The above-mentioned water-based sound and vibration-proof coating composition further comprising 10 to 120 parts by mass of silicone rubber. 7. A coating film forming method for forming at least one soundproof and vibration-proof coating film of the above water-based sound and vibration-proof coating composition on a substrate. 8. The above-described method for forming a coating film, wherein an electrodeposition coating film is formed on the substrate. 9. A coated product obtained by the above-mentioned coating film forming method.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below in detail.
I do.Water-based sound and vibration-proof coating composition  The water-based sound-proof and vibration-proof paint composition of the present invention comprises an emulsion, a powder,
Specially contains body paint and liquid paint
Sign. The above emulsion is composed mainly of resin
Is emulsified and dispersed in water by a method such as emulsion polymerization.
is there. The solid content of the above emulsion is particularly limited.
Not specified, for example, 30 to 70% by mass
Can be.

The above resin is not particularly restricted but includes, for example, resins commonly used as emulsion resins such as water-dispersible or water-soluble resins such as acrylic resins, polyester resins, polyurethane resins and epoxy resins. . One or two or more of the above resins can be used. In the case of using two or more, a two-component solvent-based resin such as an acrylic urethane resin, a fluorine urethane resin, or a silicone acrylic resin is used in combination. Can also. The resin used in combination is preferably a silicone acrylic resin from the viewpoints of high soundproofing, high vibration, and strength.

As the method for producing the above emulsion, a method usually used for producing an emulsion can be used. For example, a forced emulsification method in which a resin is used as it is or dissolved in a solvent and dispersed in water using the power of an emulsifier is used. And a general emulsion polymerization method for polymerizing an unsaturated monomer. The emulsion polymerization method is not particularly limited. For example, a reaction is carried out for 1 to 8 hours under the conditions of 40 to 90 ° C. using a polymerization initiator of 0.1 to 2% by mass in the presence of an emulsifier. Thereby, a resin emulsion can be obtained.

The method for producing the resin is not particularly limited, and examples thereof include a solution polymerization method in which an unsaturated monomer and a polymerization initiator are reacted in a solvent at about 50 to 150 ° C. for 2 to 8 hours. .

The solvent is not particularly limited, but the resin is dissolved or dispersed in an aqueous solvent later,
From the viewpoint of preparing the water-based sound-insulating and vibration-proof coating composition, an amphiphilic one having hydrophilicity is preferable, and alcohols such as isopropyl alcohol, methoxypropyl alcohol, and ethoxypropyl alcohol are more preferable.

As the above-mentioned emulsifier, anionic and nonionic emulsifiers can be used, and these include non-reactive and reactive ones. Non-reactive types of anionic emulsifiers include, for example, alkyl sulfates, alkyl benzene sulfonates, alkyl diphenyl ether disulfonates, polyoxyethylene alkyl phenyl ether sulfates, and the like; reactive types include AQUALON H
S-10 (trade name, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.), Latemul S-
180A (trade name, manufactured by Kao Corporation), Adecaria Soap SE
-10N (trade name, manufactured by Asahi Denka Kogyo Co., Ltd.), Elemir JS
-2 (trade name, manufactured by Sanyo Chemical Industries, Ltd.), Antox MS
-60 (trade name, manufactured by Nippon Emulsifier). Non-reactive nonionic emulsifiers include polyoxyethylene alkyl ether, polyoxyethylene phenyl ether, polyoxyethylene polycyclic phenyl ether and the like; reactive types include Aqualon RN-50 (trade name, manufactured by Daiichi Kogyo Seiyaku Co., Ltd. ), Adeka Real Soap NE-2
0 (trade name, manufactured by Asahi Denka Kogyo KK) and the like.

The unsaturated monomer is not particularly restricted but includes, for example, acrylic acid, methacrylic acid, maleic acid,
Carboxylic acids such as itaconic acid; alkyl esters of the above carboxylic acids such as ethyl (meth) acrylate; hydroxyalkyl esters of the above carboxylic acids such as hydroxyethyl (meth) acrylate; amides of the above carboxylic acids such as (meth) acrylamide And nitriles such as (meth) acrylonitrile; and vinyl compounds such as styrene, methylstyrene and vinyl acetate.

The above-mentioned polymerization initiator is not particularly limited.
For example, azo compounds such as dimethyl 2,2'-azobis (2-methylpropionate) and 2,2'-azobisisobutyronitrile; t-butylperoxy (2-ethylhexanoate); Peroxides such as benzoyl, persulfates and the like can be mentioned. It is also possible to react at a low temperature as a redox system by using a reducing agent such as a sulfite in combination.

The powder coating contained in the above-mentioned water-based sound and vibration-proof coating composition does not contain a solvent such as an organic solvent or water and comprises only a film-forming component. The powder coating is not particularly limited, and examples thereof include a thermosetting powder coating using an epoxy resin, an epoxy polyester resin, a polyester resin, an acrylic resin, a triglycidyl isocyanurate resin, or the like. The resin and the powder coating may be used alone or in combination of two or more.

The powder paint may be a powder paint which has been conventionally discarded due to mixing of dust, butter or the like, or a paint surplus recovered powder paint recovered by overspray. The powder paint as the paint surplus recovery powder paint, for example,
Excess parts that were not applied during application can be mentioned. The above-mentioned powder coating can be used in the water-based sound-proof and vibration-proof coating composition of the present invention, even when the powder coating is highly pulverized or when small dust is mixed therein. Powder coatings that have been disposed of due to the incorporation of such garbage and butter, and powder coatings that have been recovered by overspray, have been conventionally disposed of as waste without any re-use. The present invention makes it possible to reuse such a powder coating.

As a method for producing the powder coating, a method usually used for producing a powder coating can be used.
For example, after premixing raw materials such as a resin and a curing agent as necessary, a step of melt-kneading, a step of producing pellets from the melt-kneaded product obtained in the above step, and a step of pulverizing the pellets are included. Things.

In the above-mentioned melt-kneading step, raw materials such as a resin, a curing agent and additives are mixed, and the mixture is heated to 60 to 130 ° C.
And kneaded at the above temperature for 1 to 10 minutes,
The melting and kneading are performed by a kneading machine such as an extruder and a hot roll. It is preferable to use a resin that has been flaked by mechanical pulverization in advance.
Next, the melt-kneaded product obtained in the above step is extruded, cooled, and formed into pellets by a pelletizer. Subsequently, the obtained pellets are pulverized by an impact type pulverizer such as a hammer mill or an air current pulverizer such as a jet mill, and then classified by an air current classifier to obtain the powder coating.

The above-mentioned powder coating material may contain additives such as a coloring pigment, an extender pigment, a thermoplastic elastomer, a surface conditioner, an ultraviolet absorber, an antioxidant, an anti-bake agent, and a pigment dispersant, if necessary. Can be. The pigments and additives can be contained in the powder coating by adding them in the step of heating and melting and kneading.

The water-based sound-insulating and vibration-proof coating composition of the present invention preferably contains the powder coating in an amount of 10 to 80 parts by mass based on 100 parts by mass of the solid content of the emulsion. When the amount of the powder coating is less than 10 parts by mass with respect to the resin solid content, the function as soundproofing and vibration-proofing may not be sufficiently exhibited. The viscosity of the product may be too high, and storage stability and coating workability may be reduced. The content of the powder coating is more preferably 15 to the resin solid content.
To 70 parts by mass, and more preferably 20 to 60 parts by mass. In the present specification, the amounts of the powder coating, the surplus coating liquid coating, the hollow balloon, and the silicone rubber are in terms of solid content or solid content.

The excess paint liquid recovered from the paint composition contained in the water-based sound and vibration-proof and anti-vibration paint composition is obtained by collecting excess spray dust, and most of the overspray generated during painting in a wet painting booth is wet painting. They are collected in a water curtain or aquarium placed in the booth. After being collected in this way, it is guided by a pipe or the like to a separation tank that separates water and recovered paint, and floats in the separation tank or adheres to the wall or filter of the separation tank. to recover.

The above-mentioned surplus recovered liquid paint contains water, but the soundproof and vibration-proof paint composition of the present invention is a water-based paint. It is sufficient to leave it for a time until it is added. In particular, in the dispersing step in the production of the water-based sound-insulating and vibration-proof coating composition, it is preferable not to dry when adding, while on the other hand, in the dissolving step after the dispersion step of the water-based sound-proof and vibration-proof coating composition, After the coating surplus recovered liquid paint is once dried, n-butyl alcohol, alcohol solvents such as isopropyl alcohol, xylene, aromatic hydrocarbon solvents such as toluene, ethyl acetate, butyl acetate, ester solvents such as butyl cellosolve, acetone, It is preferably added after dissolving with a solvent such as a ketone solvent such as methyl ethyl ketone.

The water-based sound-insulating and vibration-proof coating composition of the present invention preferably contains 10 to 80 parts by weight of the above-mentioned surplus recovered liquid paint based on 100 parts by weight of the solid content of the emulsion. If the amount of the paint surplus recovered liquid paint is less than 10 parts by mass with respect to the resin solid content, the function as soundproofing and vibration-proofing may not be sufficiently exhibited. There is a possibility that the viscosity of the coating composition becomes too high, and storage stability and coating workability are reduced. The content of the coating surplus recovered liquid paint is more preferably 15 to 70 parts by mass, and still more preferably 20 to 60 parts by mass, based on the resin solid content.

Further, the above-mentioned water-based sound and vibration proof coating composition preferably contains a hollow balloon in order to enhance the sound and vibration proof function. When the water-based sound-proof and vibration-proof coating composition contains the hollow balloon, the general effects such as lightening of the material and heat insulation are imparted, and in particular, the hollow balloon has a void, and Due to being different from resin and the like, a sound and vibration energy incident on the coating film is attenuated by converting the energy into thermal energy, etc., thereby producing a high sound and vibration proof effect. As a result, the film functions as a bulking agent, and as a result, the film thickness can be increased, and the soundproofing and vibration-proofing effect can be further enhanced.

The above-mentioned hollow balloon is a granular material having a hollow. The material of the hollow balloon is not particularly limited, and examples thereof include glass, a crosslinked or non-crosslinked acrylic resin, and a composite carbonate of calcium and magnesium. The term “hollow” used herein refers to an open core structure, a porous structure, or the like. Open core structures are preferred. The shape of the hollow balloon may be spherical, needle-like, plate-like, column-like, or the like, but is preferably spherical from the viewpoint of strength and sound and vibration proofing. The surface of the hollow balloon may be treated with organic particles, titanium oxide, or the like.

The hollow balloon has a particle size of 0.1 to 25.
It is preferably 0 μm. If the particle diameter of the hollow balloon is less than 0.1 μm, the effect of adding the hollow balloon may not be sufficiently obtained, and if it exceeds 250 μm, the coating workability, the appearance and physical properties of the obtained coating film are reduced. There is fear. The particle diameter of the hollow balloon is more preferably 0.3 to 220 μm, and still more preferably 1 to 200 μm.

The specific gravity of the hollow balloon is 0.01 to 5
It is preferred that When the specific gravity is less than 0.01, the storage stability of the obtained water-based soundproofing and vibration-proof coating composition may decrease. When the specific gravity is more than 5, hollow voids become insufficient, and the hollow balloon is added. The effect may not be obtained. The specific gravity is more preferably 0.05 to 3
And more preferably 0.1 to 2.

The hollow balloon is not particularly limited as long as it has the above-mentioned properties. Examples thereof include JSR hollow particles (trade name, manufactured by Nippon Synthetic Rubber Co., Ltd.) and Microdoll (trade name, manufactured by Hoechst Synthetic Co., Ltd.) , Microsphere (trade name, manufactured by Matsumoto Yushi Pharmaceutical Co., Ltd.), CEL-STAR (trade name, manufactured by Asahi Glass Co., Ltd.), HSC-110 (trade name, manufactured by Toshiba Barotini Co., Ltd.), SYB series (trade name, manufactured by Toyowa Naoshi) ).

The water-based soundproof and vibration-proof coating composition of the present invention comprises the above-mentioned hollow balloon and the above-mentioned emulsion having a resin solid content of 100%.
The content is preferably 5 to 160 parts by mass with respect to parts by mass. When the hollow balloon is less than 5 parts by mass with respect to the resin solid content, the soundproofing and vibration-insulating effect due to containing the hollow balloon may not be obtained. There is a possibility that the fluidity, storage stability, paintability or film-forming property of the vibration-damping coating composition will deteriorate, the physical properties of the coating film will deteriorate, the adhesion to the substrate will decrease, and the like. The content of the hollow balloon with respect to the resin solid content is more preferably from 10 to 100 parts by mass, and still more preferably from 10 to 80 parts by mass.

Further, it is preferable that the water-based soundproof and vibration-proof coating composition contains a silicone rubber in order to enhance the soundproof and vibration-proof function. When the water-based sound-proof and vibration-proof coating composition contains the silicone rubber, the elasticity of the silicone rubber buffers and absorbs the sound and vibration energy incident on the coating film, thereby exhibiting a high sound-proof and vibration-proof effect. In addition, due to the fact that the silicone rubber is different from the surrounding resin and the like, the sound and vibration energy is converted to heat energy to be attenuated, thereby producing a high sound and vibration damping effect. As a result of functioning as a bulking agent based on the bulkiness of the hollow balloon, the film thickness can be increased,
The sound and vibration proof effect can be further enhanced.

The above-mentioned silicone rubber can be contained in the above-mentioned aqueous soundproof and vibration-proof coating composition instead of or together with the above-mentioned hollow balloon. It is preferable to use the silicone rubber together with the hollow balloon, since the soundproofing and vibration-proofing effect is further improved.

The silicone rubber is a soft gel-like material containing silicone as a main material, and may be porous. The shape of the silicone rubber is not particularly limited, and may be, for example, a powder, a sphere, a needle, a plate, a column, or the like. However, a powder is preferable from the viewpoint of strength and sound and vibration proofing.

The silicone rubber has a particle size of 1 to 10
It is preferably 0 μm. If the particle diameter of the hollow balloon is less than 1 μm, the effect of adding the silicone rubber cannot be sufficiently obtained, and if it exceeds 100 μm, coating workability and appearance and physical properties of the obtained coating film may be deteriorated.
The particle size of the silicone rubber is more preferably from 4 to
50 μm.

The above silicone rubber has a specific gravity of 0.30 to 0.30.
It is preferably 1.30. When the above specific gravity is less than 0.30, the storage stability of the obtained water-based soundproof and vibration-proof coating composition may decrease. When the specific gravity exceeds 1.30, the dispersibility in the obtained water-based soundproof and vibration-proof paint composition can be reduced. In addition, there is a possibility that the sound and vibration proof effect obtained by containing the silicone rubber may not be sufficiently obtained. The specific gravity is more preferably 0.40 to 1.20, and still more preferably 0.1 to 1.20.
50 to 1.10.

The silicone rubber is not particularly limited as long as it has the above characteristics.
L, βGEL, γGEL, θ series
Geltech Co., Ltd.).

The water-based soundproof and vibration-proof coating composition of the present invention comprises the above silicone rubber and the above emulsion having a resin solid content of 10%.
It is preferably contained in an amount of 10 to 120 parts by mass with respect to 0 parts by mass. When the silicone rubber is less than 10 parts by mass with respect to the resin solid content, the soundproofing and vibration damping effect by containing the silicone rubber may not be obtained,
If the amount is more than 120 parts by mass, the fluidity, storage stability, paintability or film-forming property of the obtained coating composition may be deteriorated, the physical properties of the coating film may be deteriorated, and the adhesion to the substrate may be lowered.
The content of the silicone rubber with respect to the resin solid content is more preferably 15 to 115 parts by mass, and still more preferably 20 to 110 parts by mass.

The color of the silicone rubber and the hollow balloon is not particularly limited, and can be appropriately selected according to the application. When applied to a portion that is difficult for human eyes to see, it is not necessary to add a color. , Transparent, translucent,
It may be white, gray or milky white.

The particle size of the silicone rubber and the hollow balloon need not be uniform, and may be widely distributed. When the distribution of the particle diameter is wide, particles having a small diameter can enter between the particles having a large diameter.As a result, the distribution of the silicone rubber and the hollow balloon in the water-based soundproof and vibration-proof coating composition of the present invention is reduced. As a result, the sound and vibration proof properties of the obtained coating film can be further improved.

The method for incorporating the above-mentioned hollow balloon and / or silicone rubber into the above-mentioned water-based soundproof and vibration-proof coating composition is not particularly limited. A method in which a balloon and / or silicone rubber is added and mixed using a high disperser having relatively low shearing force or the like is used. The water-based soundproofing and vibration-proof coating composition of the present invention further comprises, if necessary, an aqueous solvent, a coloring pigment, an extender, a preservative, a dispersant, a defoaming agent, a thickener, an adhesion improver, and an antifreezing agent. And additives such as a stabilizer, an anti-skinning agent, a rust preventive, and a film forming aid (solvent).

The aqueous solvent is not particularly limited as long as it can dissolve the solid content of the emulsion resin.
For example, water, an aqueous acetic acid solution, an aqueous ammonia solution, an alcohol solvent, and the like can be given. The aqueous solvent can be selected according to the type of resin solid used.

The water-based sound-insulating and vibration-proof coating composition of the present invention can be prepared by a method for producing an ordinary aqueous resin dispersion. For example, the above-mentioned emulsion, the above-mentioned powder coating, the above-mentioned surplus recovered liquid coating, and A diversion emulsification method in which water is added and emulsified while stirring a solvent mixture as necessary is preferable from the viewpoint of preventing gelation during emulsification and ensuring stability after emulsification. The temperature at the time of the emulsification can be performed at room temperature, but heating and cooling may be performed as necessary.

The film forming method of a coating film forming method of the present invention, the substrate to form at least one layer of soundproofing and vibration-proof coating according to the above aqueous soundproof vibration damping paint composition. When the coating material coated by the coating film forming method of the present invention is an automobile body, the base material is previously subjected to a chemical conversion treatment, a base coat by undercoating by electrodeposition coating, and after the electrodeposition coating film is formed, Preferably, at least one layer is formed.

The method of applying the water-based soundproof and vibration-proof coating composition is not particularly limited. For example, the composition is applied by a conventionally known coating method such as a roll coater, dip coating, spray coating, brushing, or electrostatic coating. be able to.

In the method for forming a coating film of the present invention, the substrate is not limited, and metals such as iron, aluminum, copper and alloys thereof; inorganic materials such as glass, cement and concrete; Resin, polypropylene resin, ethylene-vinyl acetate copolymer resin, polyamide resin, acrylic resin, vinylidene chloride resin, polycarbonate resin, polyurethane resin, epoxy resin and other resins, and various plastic materials such as FRP; wood, fiber materials ( Natural or synthetic materials such as paper and cloth). In particular, the use of a metal having a large sound or vibration transmission speed and a substrate having a property of expanding sound or vibration sufficiently enhances the sound and vibration damping effect of the aqueous sound and vibration damping coating composition of the present invention. It is preferable because it can be exerted.

The coating film coated by the above-mentioned coating method can be dried and cured by a usual method. For example, a method such as natural drying, hot air drying, infrared ray, far infrared ray drying, and electric furnace drying can be employed. .

The dry film thickness of the coating film obtained by the above coating method is not particularly limited, and may be, for example, 10 to 5000 μm. If the dry film thickness is less than 10 μm, sufficient soundproof and vibration-proof properties cannot be obtained. If the dry film thickness exceeds 5000 μm, it takes a long time to dry the coating film and cracks are liable to occur during drying. The dry film thickness is preferably 10
0 to 1000 μm, more preferably 300 to 80 μm.
0 μm. Normally, the water-based paint composition is easy to cause sagging, etc., it is not easy to apply a thick coating, but the water-based soundproof and vibration-proof coating composition can be applied thick because it contains a powder coating, In particular, when the above-mentioned hollow balloon is contained, it is possible to apply a thicker coating, and it is possible to preferably apply a thickness of 500 to 600 μm by one coating.

The aqueous anti-vibration and anti-vibration coating composition of the present invention applied to the above-mentioned substrate by the above-mentioned coating method and dried can be used as an anti-vibration and anti-vibration material. Etc., a coating film can be formed.

The present invention is an aqueous soundproof and vibration-proof coating composition containing the above-mentioned emulsion, the above-mentioned powder coating and the above-mentioned surplus recovered liquid coating. The sound-proof and vibration-proof effect can be kept constant without any gap between the material surface and the coating film, and the yield for the sound-proof and vibration-proof effect can be improved.

[0048]Painted object  The coated product of the present invention was coated by the above coating film forming method.
The base material, the above-mentioned water-based soundproof and vibration-proof coating composition
At least one soundproof and vibration-proof coating film is formed.
If the painted object is an automobile body, the substrate must be chemically treated and
The above-mentioned water-based soundproof and vibration-proof
At least one layer of the sound and vibration proof coating of the coating composition
Has been established.

[0049]

EXAMPLES Next, the present invention will be described more specifically with reference to examples and comparative examples, but the present invention is not limited to these examples. In addition, the compounding amount represents a mass part unless there is particular notice. The names of raw materials, paints, and equipment represent trade names unless otherwise specified. (Preparation of water-based soundproof and vibration-proof coating composition) 8.01 parts by mass of tap water, 2.16 parts by mass of dispersant (DISPERBYK-190, BYK), defoamer (SN deformer 7)
77, manufactured by San Nopco Co.) 0.21 parts by mass of the paint shown in Table 1 was added to 0.21 part by mass of a tank, and the following types of emulsion excess recovered liquid paint A or B were applied to 100 parts by mass of the resin solid content of the emulsion shown in Table 1. , White pigment (titanium CR-
95 (TIPAQUE CR-95), manufactured by Ishihara Titanium Industry Co., Ltd.) 26.84 parts by mass, extender pigment (Optiwhite,
2.95 parts by mass of Ishihara Calcium Industry Co., Ltd., 0.2 of defoamer (SN Deformer 777, manufactured by San Nopco) 0.2
1 part by mass was charged in order and stirred for 30 minutes using a dispersing machine (SG Mill, manufactured by Taihei System Co., Ltd.), and then 0.42 of tap water was added.
The inside of the tank was washed using parts by mass to obtain a dispersion paste.

The obtained dispersion paste was mixed with tap water 13.6.
After extruding using 8 parts by mass, 41.75 parts by mass of a silicone acrylic emulsion (molecular weight: 20 to 300,000, acid value: 10, Nippon Paint Co., Ltd.) was charged, and then
0.68 parts by mass of tap water, thickener (HEC Daicel S
P600N, manufactured by Daicel Chemical Industries, Ltd.) and a premix consisting of 0.02 parts by mass of 0.002 parts by mass of 25% aqueous ammonia as a pH adjuster, and 0.94 parts by mass of butyl glycol ether as a film-forming auxiliary. A preliminary mixture consisting of 0.94 parts by mass of tap water is dropped and charged, and subsequently, a film-forming aid (CS-12 (Kyowanol M), manufactured by Chisso Corporation) is dropped, and further, a preservative (Bestside- 201, manufactured by Dainippon Ink and Chemicals Inc.) 0.1 part by mass, p
An H adjuster (AMP-90, manufactured by Nagase & Co., Ltd.) was charged in this order, stirred for 30 minutes and dissolved to obtain a silicone acrylic emulsion.

To the silicone acrylic emulsion obtained as described above, powder coating 1 or 2 shown below was added in an amount shown in Table 1 with respect to 100 parts by mass of the resin solid content, and a thickener (50% ASE-60, Roman Were mixed using a disper stirrer to obtain an aqueous soundproof and vibration-proof coating composition. As an example of the case where a hollow shirasu balloon or silicone rubber was added, the following types were added after adding the powder coating in the amounts shown in Table 1 based on 100 parts by mass of the resin solid content.

(Surplus paint liquid paint) Surplus paint liquid A: An acrylic / melamine resin organic solvent liquid paint (Superlac M180, manufactured by Nippon Paint Co., Ltd.)
The surface of a 0.8 × 300 × 500 mm bond steel plate (manufactured by Nippon Test Panel Kogyo Co., Ltd.) is electrostatically coated so as to have a dry film thickness of 40 μm. Collected in the recovery tank

Excessive recovered liquid paint B: acrylic / melamine resin-based aqueous liquid paint (Supernicks M300,
Nippon Paint Co., Ltd.) was electrostatically coated on a surface of a 0.8 × 300 × 500 mm bond steel plate (manufactured by Nippon Test Panel Industry Co., Ltd.) so as to have a dry film thickness of 40 μm. Liquid paint collected in the collection tank of the wet painting booth

(Powder coating) Powder coating 1: epoxy polyester powder coating (H-1)
00 white, manufactured by Nippon Paint Co., Ltd. Powder coating 2: 0.8 × 300 × 500
mm Bonded steel plate (manufactured by Nippon Test Panel Kogyo Co., Ltd.) electrostatically coated to a dry film thickness of 80 μm on the surface, and the excess powder paint that did not adhere to the steel plate was recovered by a powder recovery device. Hollow shirasu balloon 1: SYB-3000, average particle size 5
Hollow Shirasu Balloon 2: SYB-6000, manufactured by Howa Nao Corporation, average particle size 1
80 μm, Toyohadaiko Silicone Rubber 1: αGEL, average particle size 40 μm, Geltech

(Preparation of base material) Dull steel plate (0.8 × 300
× 300 mm) with a zinc phosphate treatment agent (“Surdyne SD”
2000 ", manufactured by Nippon Paint Co., Ltd., and then cationic electrodeposition paint (" Power Top U-50 ",
Nippon Paint Co., Ltd.) was electrodeposited so that the dry film thickness was 25 μm.

[0056]Examples 1 to 31, Comparative Examples 1 to 5  On the above-mentioned substrate, the water-based soundproof and vibration-proof coating composition obtained above
On one side so that each dry film thickness is 200 μm
Spray coating only, dried at 30 ° C for 1 day,
Obtained. The sound insulation and vibration isolation were evaluated by the following methods, and the results
Are shown in Table 1. (Soundproofing) Using the coated plate obtained above as a test plate,
Test with a metal hammer while hanging the upper two places with thread
The piece was hit hard, and the noise reduction effect was evaluated according to the following criteria. ○: almost no reverberation ×: reverberation

(Vibration Isolation) Using the coated plate obtained as described above as a test plate, a rectangular test piece having a width of 30 mm and a length of 250 mm was measured by a resonance method using an FFT analyzer (P & K, model 2032). A resonance point is obtained by changing the frequency at 40 ° C., and a bandwidth (f2−f1) at a point (half point) lower by 3 dB from the peak according to the equation η = (f2−f1) / fn and its resonance frequency (fn) The loss coefficient (η) was determined from the ratio of ○: Loss coefficient (η) is 0.6 or more ×: less than 0.6

[0058]

[Table 1]

As shown in Table 1, Examples 1 to 16 in which a water-based sound and vibration-proof coating composition of the present invention containing an unused or recovered powder coating and a surplus recovered liquid coating were applied. Are superior to any of Comparative Examples 1 to 5 in soundproofing and vibration-proofing effects. Further, Examples 17 to 31 in which the water-based soundproofing and vibration-proof coating compositions of the present invention containing a hollow balloon and / or silicone rubber are applied are: , And the sound and vibration proof effect was excellent.

[0060]

The water-based soundproof and vibration-proof coating composition of the present invention includes:
Since the above-mentioned powder paints and liquid paints, which were conventionally disposed of as industrial waste, can be reused, such paints can be used effectively and resources can be reduced, contributing to environmental protection. Rather, the powder coating also contributes to enhancing the sound and vibration proof effect by functioning mainly as an extender in the aqueous sound and vibration proof coating composition of the present invention.

When the aqueous soundproof and vibration-proof coating composition of the present invention contains the above-mentioned hollow balloon, the soundproof and vibration-proof properties can be further improved. The mechanism in which the soundproofing and vibration-proofing properties are improved by containing the hollow balloon, the energy of sound or vibration incident on the coating film containing the hollow balloon,
It is considered that the hollow space of the hollow balloon and the solid content around the hollow balloon convert the heat into thermal energy, and attenuate and absorb the heat, reduce the sound and vibration. Further, the hollow balloon is different from the other components of the coating film, and when sound or vibration enters the coating film, friction occurs inside the coating film due to a difference in viscoelasticity or the like, and the sound or vibration is reduced. It is considered that the energy and the heat are converted into the heat energy and attenuated, and the sound and the vibration are also reduced.

When the water-based sound-proof and vibration-proof coating composition of the present invention contains the silicone rubber, the sound-proof and vibration-proof properties can be further improved. The mechanism for improving the soundproofing and vibration-proofing properties by containing the silicone rubber is that the silicone rubber is different from other components of the coating film, and thus has a function of reducing sound and vibration similarly to the hollow balloon. Since the silicone rubber has a high shock absorption performance and a short vibration damping time, it is considered that the above-mentioned sound and vibration are reduced by quickly buffering and absorbing the energy of the sound and vibration incident on the coating film. Further, since the coating film obtained by the present invention has a high soundproofing and vibration-proofing property, it is preferably used for painted objects requiring high soundproofing and vibration-proofing properties such as automobiles, motorcycles, and other vehicle outer panels, coil coatings, home appliance industry, and building materials. used.

Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat II (Reference) C09D 5/03 C09D 5/03 7/12 7/12 183/04 183/04 F term (Reference) 4D075 AE03 BB89X CA03 CA05 CA13 CA47 DA06 DA23 DB02 DB06 DB07 DB12 DB13 DB18 DB20 DB21 DB36 DB38 DB40 DB43 DB47 DB48 DB50 DB53 DB61 DC01 DC10 DC12 DC13 DC18 EA02 EA06 EA13 EB14 EB16 EB19 EB22 EB33 EB35 EB38 EB43 EB56 EC01 EC07 EC24 EC54 4 HA486 KA21 MA03 MA08 MA10 NA09 NA27 PB07 PC02 PC03 PC04 PC06 PC08 PC10

Claims (9)

[Claims] 1. A water-based sound-proof and vibration-proof paint composition containing an emulsion, a powder paint and a paint surplus recovered liquid paint. 2. The water-based sound and vibration-proof coating composition according to claim 1, wherein the powder coating is contained in an amount of 10 to 80 parts by mass based on 100 parts by mass of the resin solid content of the emulsion. 3. The water-based soundproof and vibration-proof paint composition according to claim 1, wherein the powder paint is a paint surplus recovered powder paint. 4. The water-based sound-proof and vibration-proof paint composition according to claim 1, wherein the paint surplus recovered liquid paint is contained in an amount of 10 to 80 parts by weight based on 100 parts by weight of the resin solid content of the emulsion. 5. The water-based sound and vibration-proof coating composition according to claim 1, further comprising 5 to 160 parts by mass of a hollow balloon based on 100 parts by mass of the resin solid content of the emulsion. 6. The water-based soundproof and vibration-proof coating composition according to claim 1, further comprising 10 to 120 parts by mass of silicone rubber based on 100 parts by mass of the resin solid content of the emulsion. 7. A coating film forming method for forming at least one soundproof and vibration proof coating film of the aqueous sound proof and vibration proof coating composition according to any one of claims 1 to 6 on a substrate. 8. The method according to claim 7, wherein an electrodeposition coating film is formed on the base material. 9. A coated article obtained by the method of claim 7 or 8.