KR20200040128A - Undercoat acrylic emulsion composition for environmentally friendly vehicles. - Google Patents

Abstract

The present invention relates to an eco-friendly acrylic emulsion composition for undercoating of vehicles, which has a reduced VOC and an improved freezing point depression function. More particularly, the present invention relates to an acrylic emulsion composition for undercoating of vehicles which has excellent adhesive property, bondability and anti-corrosive property, when being sprayed through air spray to the lower part and inner part of a main body of vehicles, and shows excellent compatibility with synthetic rubber latex, or the like. The acrylic emulsion composition for undercoating of vehicles includes 30-80 parts by weight of acrylic emulsion, 5-20 parts by weight of synthetic rubber latex, 1-10 parts by weight of a cold resistant plasticizer, 1-10 parts by weight of freezing-thawing stabilizer, 5-20 parts by weight of an inorganic filler and 0.1-2 parts by weight of a dispersing agent. The present invention provides an aqueous undercoating agent for use in winter season exclusively, which is eco-friendly with a low VOC, contains no six typical heavy metals, allows easy work and coating film formation even at low temperature, and shows excellent anti-corrosive, cold resistance, sound-absorbing and sound-proofing effects.

Description

{Undercoat acrylic emulsion composition for environmentally friendly vehicles.}

The present invention relates to an environmentally friendly acrylic emulsion composition that improves the undercoating VOC reduction and freezing point lowering function for automobiles, and more specifically, adhesion, adhesion, and rust resistance when coating with an air spray on the lower and interior of a vehicle body. This excellent and excellent compatibility with synthetic rubber latex and the like relates to an eco-friendly automotive undercoat acrylic emulsion composition that can be used exclusively for the winter season.

In general, when the vehicle is completed and shipped, the undercarriage of the vehicle body is undercoated to prevent corrosion and to improve the quality of the vehicle through sound insulation and anti-rusting, but undercoating is not performed on the entire underbody of the vehicle. Undercoating is performed only in a very limited range. The lower part of the car is exposed to calcium chloride sprayed on the road in winter, rain on summer rain, salt water on the beach, etc., and corrosion occurs.In addition, when the car is operating, it is exposed to the shock generated by the stone scattered by the tire hitting the lower part of the car. have. For this reason, the user who purchased the car prevents corrosion that may occur in the course of using the car for a long time, thereby extending the life of the car and at the same time undercoating to obtain a comfortable ride through absorption of noise or shock. It is often performed. For example, in the process of driving on a paved road, asphalt components and other foreign substances are constantly attached and deposited on the lower part of the vehicle body to contaminate it, or, in the case of winter, calcium chloride sprayed on the road during snowfall is adsorbed on the lower part of the vehicle body. This causes the corrosion of the vehicle body to be accelerated.

In addition, it is contaminated by foreign substances such as fine dust (sand grains) generated in the course of driving off-road, and vibrations or sand are scattered by the wheels, colliding with the lower part of the vehicle body, causing a lot of noise and shock, and riding comfort. It is acting as a cause of lowering. In order to solve this problem, undercoating is performed on the lower portion of the vehicle body, and these coating agents are coated on the external exposed parts such as the underbody of the vehicle and the wheel house, thereby providing soundproofing, anti-rusting, and abrasion resistance to provide vibration and soundproofing of the vehicle. Improve it. However, in the prior art, various products such as PVC (soft), Epoxy, and Asphalt rubber have been used among compositions for performing automotive under coating, and in recent years, aqueous under coating in accordance with environmental standards has been used, but the adhesion, elasticity, The effect was insignificant in anti-corrosive properties. Therefore, it is excellent in adhesiveness, adhesion and anti-corrosion when it is applied to the lower and inner parts of automobiles, for example, external parts of automobiles, such as the car's underbody, wheel house, and meets environmental standards, and is used with synthetic rubber latex, etc. There is an urgent need to develop an acrylic emulsion with excellent compatibility. In particular, the need for a water-based undercoat for exclusive use of the winter season that provides the best anti-corrosive effect, cold resistance, sound absorption, and sound insulation effect that is eco-friendly with low VOC, does not contain six heavy metal materials, is easy to work even at low temperatures, and can form a coating film is desperate. The invention was completed.

Domestic registered patent No. 10-1679908 (2016.11.21.) Domestic registered patent No. 10-1590905 (2016.01.27.) Domestic registered patent No. 10-1236415 (2013.02.18.)

The present invention aims to solve the problems and technical problems of the prior art as described above.

An object of the present invention is to provide an undercoating acrylic emulsion composition for automobiles, which is excellent in adhesiveness, adhesion, and anti-corrosion property and has excellent compatibility with synthetic rubber latex, etc. when coating with an air spray on the lower and interior of a vehicle body.

Another object of the present invention is to provide an environmentally friendly aqueous undercoating agent as an aqueous undercoating agent that provides workability and film formation at low temperatures.

According to an embodiment of the present invention, 30 to 80 parts by weight of an acrylic emulsion, 5 to 20 parts by weight of a synthetic rubber latex, 1 to 10 parts by weight of a cold-resistant plasticizer, 1 to 10 parts by weight of a freeze-thawing stabilizer, inorganic filler 5 based on the total composition 100 An environment-friendly automotive undercoating acrylic emulsion composition comprising 20 to 20 parts by weight and 0.1 to 2 parts by weight of a dispersant is provided.

According to an embodiment of the present invention, the acrylic emulsion is provided with an environmentally friendly automotive undercoating acrylic emulsion composition comprising at least any one of an acrylic monomer, a reactive monomer, a coupling agent, a surfactant, a catalyst, and water.

According to an embodiment of the present invention, the synthetic rubber latex is provided with an eco-friendly automotive undercoating acrylic emulsion composition comprising at least one selected from the group consisting of SB latex, CR latex, NB latex and IR Latex.

According to an embodiment of the present invention, an environmentally friendly undercoating acrylic emulsion composition for automobiles is further provided, which further comprises at least one selected from the group consisting of alkyl acrylate, alkyl methacrylate, acrylic acid, and methacrylic acid reactive crosslinking agent.

According to an embodiment of the present invention, the acrylic monomer is butyl (meth) acrylate, ethyl acrylate, methyl (meth) acrylate, acrylonitrile, alpha methyl styrene, 2-hydroxyitaconic acid, ethyl methacrylate, Provided is an eco-friendly undercoating acrylic emulsion composition for automobiles comprising at least one selected from the group consisting of isoboryl metaacrylate and acrylic acid metaacrylate.

According to an embodiment of the present invention, the reactive monomers are arylmethacrylate, grisidylmethacrylate, ethylene glycol dimethacrylate, crosslinking monomer, normal methylol acrylic imide, N-butoxy methyl acrylamide and tert- An environment-friendly undercoating acrylic emulsion composition for automobiles comprising at least one selected from the group consisting of butyl acylamide is provided.

In one embodiment of the present invention, the coupling agent is N- (2-aminoethyl) -3-aminopropyl trimethoxysilane (N- (2-aminoethyl) -3-aminopropyltrimethoxysilane), vinyltriethoxysilane , 3-Glycidoxypropyl trimethoxysilane is provided for an eco-friendly automotive undercoating acrylic emulsion composition comprising at least one selected from the group consisting of methacryloxypropyl trimethoxysilane.

According to an embodiment of the present invention, the surfactant is SE-1025, SE-10N, RS-610 Aliphatic phosphate Ester, Poly erizable phosphate, CA-40S sodium salt sulfate Any one selected from the group consisting of Sodium salt sulfate alkyl Ethoxylate, CO-436 Ammonium alt sulfate alkyl Ethoxylate and DS4 Sodium Dodecyl Bengen Sulfanate An environment-friendly automotive undercoating acrylic emulsion composition is provided.

According to an embodiment of the present invention, the catalyst is an APS (ammonium persulphate, ammonium persulphate) characterized in that the environment-friendly automotive undercoat acrylic emulsion composition is provided.

According to an embodiment of the present invention, preparing a reaction tank, a cylindrical stirrer for agitator, and adding 100 to 300 parts by weight of water and 1 to 10 parts by weight of surfactant to the reactor to warm to 80 ° C .; After step a, pre-emulsifying the monomer tank comprising 50 to 150 parts by weight of water, 1 to 10 parts by weight of emulsifier, 400 to 600 parts by weight of acrylic monomer and 10 to 30 parts by weight of reactive monomer; Eco-friendly vehicle comprising the step of dropping reaction of 80 ° C to 90 ° C for 1 hour to 3 hours by adding 0.05 to 0.15 parts by weight of catalyst after step b and preparing an emulsion solution by aging at 80 ° C to 90 ° C for 3 hours after step c Provided is a method for manufacturing an undercoat acrylic emulsion composition.

According to an embodiment of the present invention, the surfactant in step a) includes any one or more of SE-10N and RS-610, and the acrylic monomer in step b) is butyl acrylate, methyl ketaacrylate, or styrene monomer. And at least one of isobornyl methacrylate, the reactive monomer includes at least one of allyl methacrylate and glycidyl methacrylate, and the catalyst of step c) is APS (ammonium persulfate It provides a method for manufacturing an undercoating acrylic emulsion composition for a vehicle, characterized in that.

The present invention has an effect of providing an acrylic emulsion having excellent adhesiveness, adhesion and rust resistance, meeting environmental standards, and having excellent compatibility with synthetic rubber latex.

In addition, the present invention is eco-friendly with low VOC, does not contain six heavy metal materials, and is particularly easy to work even at low temperatures and provides the best anti-corrosive effect and cold-resistance, sound-absorbing, sound-absorbing effect that can be formed even at low temperatures. It works.

The following description of the present invention refers to specific embodiments in which the present invention may be practiced. These examples are described in detail enough to enable those skilled in the art to practice the present invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the technical spirit and scope of the invention in connection with one embodiment. In addition, it should be understood that the location or arrangement of individual components within each disclosed embodiment can be changed without departing from the spirit and scope of the invention.

Therefore, the following detailed description is not intended to be taken in a limiting sense, and the scope of the present invention, if appropriately described, is limited only by the appended claims, along with all ranges equivalent to those claimed.

Hereinafter, with reference to the preferred embodiments of the present invention will be described in detail to enable those of ordinary skill in the art to easily implement the present invention.

According to an embodiment of the present invention, 30 to 80 parts by weight of an acrylic emulsion, 5 to 20 parts by weight of a synthetic rubber latex, 1 to 10 parts by weight of a cold-resistant plasticizer, 1 to 10 parts by weight of a freeze-thawing stabilizer, inorganic filler 5 based on the total composition 100 An environment-friendly automotive undercoating acrylic emulsion composition comprising 20 to 20 parts by weight and 0.1 to 2 parts by weight of a dispersant is provided.

According to an embodiment of the present invention, the acrylic emulsion is provided with an environmentally friendly automotive undercoating acrylic emulsion composition comprising at least any one of an acrylic monomer, a reactive monomer, a coupling agent, a surfactant, a catalyst, and water. In addition, it is possible to further synthesize an undercoat acrylic emulsion for automobiles by further including an antifoaming agent, a thickener, a dispersing agent, and a crosslinking agent. If a crosslinking agent and a coupling agent are used for the net work structure of the emulsion, physical properties may be increased, and N-methoxy methyl acrylamide, N-butoxy methyl acrylamide, etc. are used as the crosslinking agent, and the coupling agent is preferably 1 ) N- (2-aminoethyl) -3-aminopropyltrimethoxysilane (N- (2-aminoethyl) -3 aminopropyltrimethoxysilane), 2) 3-Glycidoxypropyl trimethoxysilane 3 ) Vinyltriethoxysilane is provided, but is not limited thereto.

According to an embodiment of the present invention, any one or more selected from allyl methacrylate, glycidyl methacrylate, and ethylene glycol dimethacrylate may be used to increase the molecular weight and adhesion strength, water resistance, and weather resistance of the acrylic emulsion polymer. You can.

According to an embodiment of the present invention, the acrylic monomer is butyl (meth) acrylate, ethyl acrylate, methyl (meth) acrylate, acrylonitrile, alpha methyl styrene, 2-hyrooxyitaconic acid, ethyl methacrylate, Provided is an eco-friendly undercoating acrylic emulsion composition for automobiles comprising at least one selected from the group consisting of isoboryl metaacrylate and acrylic acid metaacrylate.

According to an embodiment of the present invention, the reactive monomers are arylmethacrylate, grisidylmethacrylate, ethylene glycol dimethacrylate, crosslinking monomer, normal methylol acrylic imide, N-butoxy methyl acrylamide and tert- An environment-friendly undercoating acrylic emulsion composition for automobiles comprising at least one selected from the group consisting of butyl acylamide is provided. Reactive monomers can be used to improve the water resistance of acrylic emulsions and adhesion to substrates.

According to an embodiment of the present invention, the coupling agent is N- (2-aminoethyl) -3-aminopropyl trimethoxysilane (N- (2-aminoethyl) -3-aminopropyltrimethoxysilane), vinyltriethoxysilane ), 3-glycidoxypropyl trimethoxysilane (3-Glycidoxypropyl trimethoxysilane) and methacryloxy propyl trimethoxysilane is provided with an environmentally friendly automotive undercoat acrylic emulsion composition comprising at least one selected from the group consisting of.

According to an embodiment of the present invention, the surfactant may be any one or more selected from the group consisting of anion properties, reactive emulsifiers and phosphorus-based surfactants. Reactive emulsifier (anion) and used for anti-rusting, two or more can be used, the surfactant SE-1025, SE-10N, RS-610 Aliphatic phosphate ester (Aliphatic phosphate Ester), poly erysable phosphate ( Poly erizable phosphate, CA-40S Sodium salt sulfate alkyl Ethoxylate, CO-436 Ammonium alt sulfate alkyl Ethoxylate and DS4 sodium dodecyl benzene sulfate (Sodium Dodecyl Bengen Sulfanate) is provided with an eco-friendly undercoat acrylic emulsion composition for at least one selected from the group consisting of.

According to an embodiment of the present invention, the catalyst may be used to promote the reaction, APS (ammonium persulphate), BPO (Benzoyl Peroxide), AIBN (2,2'-Azobisisobutyronitrile) and DTBPO (Di-Tert-Butyl Peroxide) ) May be used at least any one selected from the group consisting of, it may be preferably used that is APS (ammonium persulphate).

According to an embodiment of the present invention, the synthetic rubber latex is provided with at least one selected from the group consisting of SB latex, CR latex, NB latex, and IR latex.

Water according to an embodiment of the present invention is used as a solvent, it can be used to adjust the viscosity of the automotive undercoat acrylic emulsion composition. In addition, the VOC minimization process can use water or eco-friendly solvent (Ethanol). In addition, any one or more selected from the group consisting of alkyl acrylate, alkyl methacrylate, acrylic acid, and methacrylic acid reactive crosslinking agent may be used to prevent corrosion by brine. In addition, as a method for improving cold resistance for forming a film at low temperature, synthetic rubber (SBR, NBR) is used, in addition to adding cold-resistant plasticizer DBS and freeze-thawing stabilizer EG (Ethylene Glycol), DEG (Diethylene Glycol), etc. Provide optimized products.

According to an embodiment of the present invention, the inorganic filler may be used to improve the mechanical properties of the automotive undercoating acrylic emulsion composition, for example, as the filler, calcium carbonate (CaCO3), titanium dioxide (TiO2) , Zinc oxide (ZnO), silica, talc, clay, bentonite, volcanic stone, zeolite and at least one selected from the group consisting of organic and inorganic hollow fillers (Filler) may be used.

According to one embodiment of the present invention, an anti-foaming agent may be used to prevent air bubbles from occurring when coating a coating film on the inside or the lower portion of a vehicle body using an undercoat acrylic emulsion composition for automobiles, for example, as the anti-foaming agent. The SAMNOPCO NXZ (NopcoChemical Co., Ltd.), BYK-190 (BYK Co., Ltd.) and Tego 760 (Evonik Co., Ltd.) selected from the group consisting of any one or more can be used.

According to an embodiment of the present invention, a thickener may be used to adjust the viscosity of an undercoat acrylic emulsion composition for automobiles, and as the thickener, any one or more selected from the group consisting of acrylic alkali thickeners, ethyl cellulose, and urethane thickeners may be used. have.

According to one embodiment of the present invention, the dispersant may be used to uniformly disperse the filler or water-dispersible acrylic resin particles mixed in the aqueous aerosol undercoat composition for automobiles, and the dispersant is BYK-190 (manufactured by BYK Corporation) Alternatively, any one or more selected from Tego 760W (manufactured by Evonik Corporation) may be used.

According to an embodiment of the present invention, the cryoprotectant is a synthetic rubber for forming a film at a low temperature, using Styrene Butadiene Rubber (SBR), Nitrile-butadiene rubber (NBR), and adding cold-resistant plasticizer DBS (Dibutyl decanedioate) and freeze-thawing stabilizer EG ( Ethylene Glycol), DEG (Diethylene glycol), etc. can be used as a method for providing the most suitable cold resistance, and any one or more selected can be used.

According to an embodiment of the present invention, preparing a reaction tank, a cylindrical stirrer for agitator, and adding 100 to 300 parts by weight of water and 1 to 10 parts by weight of surfactant to the reactor to warm to 80 ° C .; After step a, pre-emulsifying the monomer tank comprising 50 to 150 parts by weight of water, 1 to 10 parts by weight of emulsifier, 400 to 600 parts by weight of acrylic monomer and 10 to 30 parts by weight of reactive monomer; After step b, adding 0.05 to 0.15 parts by weight of the catalyst to react dropwise for 1 hour to 3 hours at 80 ° C to 90 ° C; And c step after the aging step for 3 hours at 80 ℃ to 90 ℃ to provide an environment-friendly method for manufacturing an undercoating acrylic emulsion composition for automobiles.

According to an embodiment of the present invention, a reaction tank and a cooler, a stirrer, and a cylinder separator are prepared for an emulsion reaction, surfactant and water are added to the reaction tank, and a surfactant is added thereto, heated to 80 ° C., and an acrylic monomer emulsifier is separately pre-emulsified. The reaction method in this case is provided by the retox method.

According to an embodiment of the present invention, the pre-emulsion and the catalyst are reacted dropwise for 2 hours and aged for 2 hours at 82 ° C to 86 ° C.

According to an embodiment of the present invention, the monomer may be used as ethyl acrylate, butylo (meth) acrylate, 2-ethyl hexyl acrylate, acrylonitrile, di-methyl styrene, 2-, and three or more of them are used. to provide. In addition, any one or more selected from allyl methacrylate, glycidyl methacrylate, and ethylene glycol dimethacrylate may be used to increase the molecular weight, adhesion strength, water resistance, and weather resistance of the emulsion polymer.

According to an embodiment of the present invention, the surfactant in step a) includes any one or more of SE-10N and RS-610, and the acrylic monomer in step b) is butyl acrylate, methyl ketaacrylate, or styrene monomer. And at least one of isobornyl methacrylate, the reactive monomer includes at least one of allyl methacrylate and glycidyl methacrylate, and the catalyst of step c) is APS (ammonium persulfate It provides a method for manufacturing an environment-friendly undercoating acrylic emulsion composition for automobiles.

Hereinafter, a preferred embodiment of a method for manufacturing an acrylic emulsion using an undercoat acrylic emulsion composition for automobiles according to the present invention will be described in more detail.

Acrylic emulsion production

For the emulsion reaction, a reaction tank, a cooler, a stirrer, and a cylindrical separator are prepared, and a surfactant and water are added to the reaction tank, and a surfactant is added thereto, heated to 80 ° C, and an acrylic monomer emulsifier is separately pre-emulsified. (Reaction method at this time)

The pre-emulsion and the catalyst are added dropwise for 2 hours, and the reaction is aged at 82 ° C to 86 ° C for 2 hours. The monomers to be used at this time are ethyl acrylate, 2-ethyl hexyl acrylate, acrylonitrile, di-methylstyrene, 2-hydroxy ethyl (meth) acrylate, methyl (meth) acrylate, isoboryl (meth) acrylate, Acrylic acid meta acrylic acid, itaconic acid, etc. may be used, of which three or more can be used.

In addition, one or more of allyl methacrylate, glycidyl methacrylate, and ethylene glycol dimethacrylate may be used to increase the molecular weight and adhesion strength of the emulsion polymer, water resistance, and weather resistance. For the net work structure of the emulsion, physical properties can be increased by using a crosslinking monomer and a coupling agent. The cross-linking agent used at this time is N-methoxy methyl acrylamide, N-butoxy methyl acrylamide, and the like, and the coupling agent is preferably 1) N- (2-aminoethyl) -3-aminopropyltrimethoxy Silane (N- (2-aminoethyl) -3 aminopropyltrimethoxysilane), 2) 3-Glycidoxypropyl trimethoxysilane 3) Use of vinyltriethoxysilane is provided and limited thereto Does not work.

In addition, surfactants are reactive emulsifiers and anti-rusting agents.The surfactants are SE-1025, SE-10N, RS-610 Aliphatic phosphate Ester, Poly erizable phosphate, CA- Group consisting of 40S Sodium salt sulfate alkyl Ethoxylate, CO-436 Ammonium alt sulfate alkyl Ethoxylate and DS4 Sodium Dodecyl Bengen Sulfanate It may include any one or more selected from. The emulsion (acrylic) produced in this way produces products with a molecular weight of 15,000 to 50,000, a viscosity of 50 to 300 CPS, a pH of 8.2 to 8.6, and a solid content of 50%.

Hereinafter, preferred examples and comparative examples for the undercoat acrylic emulsion composition for automobiles according to the present invention will be described in more detail.

<Example 1>

For the emulsion reaction, a reaction vessel and a stirrer cylindrical fraction were prepared, 200 g of water, 3 g of surfactant SE-10N, and 2 g of RS-610 were added to the reaction vessel and heated to 80 ° C. In addition, 100 g of water in a monomer tank, 3 g of emulsifier LA40N, 3 g of SDBS are added, 250 g of monomer butyl acrylate monomer (BAM), 150 g of methyl ketaacrylate monomer (MMA), 40 g of styrene monomer (SM), 5 g of methacrylic acid (MAA) , Isobornyl methacrylate (IBOMA) 40g, allyl methacrylate (AMA) 10g, glycidyl methacrylate (GMA) 10g and pre-emulsion. Thereafter, a dropping reaction of 80-86 ° C for 2 hours with 0.1 g of catalyst APS was carried out, and then aged at 82-86 ° C for 3 hours to obtain an emulsion.

<Example 2>

For the emulsion reaction, a reaction vessel and a stirrer cylindrical fraction were prepared, 200 g of water, 3 g of surfactant SE-10N, and 2 g of RS-610 were added to the reaction vessel and heated to 80 ° C. In addition, 100 g of water in the monomer tank, 3 g of emulsifier LA40N and 3 g of SDBS are added, and monomer BAM 200 g, MMA 200 g, SM 40 g, MAA 5 g, IBOMA 40 g, and OFS6300 10 g are added and emulsified. Thereafter, the catalyst was reacted dropwise with 0.1 g of APS at 82 to 86 ° C for 2 hours, and then aged at 82 to 86 ° C for 3 hours to obtain an emulsion.

<Comparative Example 1>

200 g of water is added to the previously prepared reaction tank, 2 g of emulsifier LA40N, 2 g of SDBS, heated to 80 ° C, 100 g of water in the monomer tank, 4 g of emulsifier LA40N, 4 g of SDBS, 150 g of monomer BAM, 250 g of MMA, 40 g of SM, 40 g of MAA, 5 g of IBOMA , 10 g of AMA, 20 g of GMA, emulsified, reacted with 0.1 g of catalyst APS at 82 to 86 ° C for 2 hours, and then aged at 82 to 86 ° C for 3 hours to obtain an emulsion.

<Comparative Example 2>

200 g of water is added to the previously prepared reaction tank, 2 g of emulsifier SE10N, 2 g of SDBS, heated to 80 ° C, 100 g of water in the monomer tank, 2 g of emulsifier SE10N, 2 g of SDBS, 250 g of monomer BAM, 170 g of MMA, 40 g of SM, 5 g of MAA, 10 g of AMA , 20 g of GMA was added, followed by emulsion, followed by a dropping reaction at 82 to 86 ° C for 2 hours with 0.1 g of catalyst APS, and then aged at 82 to 86 ° C for 3 hours to obtain an emulsion.

<Comparative Example 3>

200 g of water is added to the previously prepared reaction tank, 2 g of emulsifier RS610, 2 g of LA40N, heated to 80 ° C, 100 g of water in the monomer tank, 2 g of emulsifier LA40N, 4 g of SDBS, 250 g of monomer BAM, 130 g of MMA, 40 g of SM, 5 g of MAA, 40 g of IBOMA , 10 g of OFS6030, 10 g of GMA are added and emulsion is reacted with 0.1 g of catalyst APS at 82 to 86 ° C for 2 hours, and then aged at 82 to 86 ° C for 3 hours to obtain emulsion.

<Comparative Example 4>

200 g of water is added to the previously prepared reaction tank, 2 g of the emulsifier SE10N, 2 g of LA40N, heated to 80 ° C, 100 g of water in the monomer tank, 100 g of emulsifier LA40N, and the monomer BAM 200 g, MMA 200 g, SM 30 g, MAA 5 g, IBOMA 40 g, GMA 20 g. After putting and emulsifying, reacting with 0.1 g of catalyst APS at 82 to 86 ° C for 2 hours, and then aged at 82 to 86 ° C for 3 hours to obtain an emulsion.

<Comparative Example 5>

200 g of water is added to the previously prepared reaction tank, 3 g of emulsifier SE10N, 2 g of RS610, heated to 80 ° C., 100 g of water in the monomer tank, 5 g of emulsifier LA40N, 4 g of SDBS, 250 g of monomer BAM, 150 g of MMA, 30 g of SM, 5 g of MAA, 40 g of IBOMA , OFS6030 10g, AMA 10g is added and emulsion is added with 0.1 g of catalyst APS for 2 hours dropping at 82 ~ 86 ℃ and aged at 82 ~ 86 ℃ for 3 hours to obtain an emulsion.

The emulsions prepared according to Examples 1 and 2 and Comparative Examples 1 to 5 were blended to prepare an eco-friendly automotive undercoat acrylic emulsion. The mixing ratios of the emulsions prepared according to Examples 1 and 2 and Comparative Examples 1 to 5 are as shown in Table 1 below.

division Preparation Example 1 Preparation Example 2 Preparation Example 3 Preparation Example 4 Preparation Example 5 Preparation Example 6 Preparation Example 7 Example 1 250 - - - - - - Example 2 - 250 - - - - - Comparative Example 1 - - 250 - - - - Comparative Example 2 - - - 250 - - - Comparative Example 3 - - - - 250 - - Comparative Example 4 - - - - - 250 - Comparative Example 5 - - - - - - 250 Latex 60 60 60 60 60 60 60 Caco3 80 80 80 80 80 80 80 Nxz One One One One One One One Taxanol 4 4 4 4 4 4 4 Black 5 5 5 5 5 5 5 Dryness 25 28 30 38 30 29 30

The physical properties of the undercoat acrylic emulsion for eco-friendly automobiles manufactured at the above mixing ratio were measured.

It was confirmed that the emulsions prepared according to Preparation Examples 1 and 2 had good water resistance, rust resistance, and adhesion. On the other hand, it was confirmed that the emulsion prepared according to Preparation Example 3 had good water resistance, but lacked rust resistance and adhesion.

In addition, it was confirmed that the emulsion prepared according to Preparation Example 4 had good water resistance and adhesion, but lacked rust prevention properties and lacked latex compatibility.

In addition, it was confirmed that the emulsion prepared according to Preparation Example 5 had good adhesion, but lacked drainage and rust resistance.

In addition, it was confirmed that the emulsion prepared according to Preparation Example 6 had good water resistance, adhesion and adhesion, but lacked latex mixing.

As described above, although a preferred embodiment of the present invention has been described, those skilled in the art to which the present invention pertains understand that the present invention can be implemented in other specific forms without changing its technical spirit or essential features. Will be able to. Therefore, it should be understood that the above-described embodiment is illustrative in all respects and not restrictive.

Claims (11)

30 to 80 parts by weight of an acrylic emulsion, 5 to 20 parts by weight of a synthetic rubber latex, 1 to 10 parts by weight of a cold-resistant plasticizer, 1 to 10 parts by weight of a freeze-thawing stabilizer, 5 to 20 parts by weight of an inorganic filler and 0.1 to 0.1 parts by weight based on the total composition 100 Eco-friendly car undercoat acrylic emulsion composition comprising 2 parts by weight.
According to claim 1,
The acrylic emulsion is an environmentally friendly automotive undercoat acrylic emulsion composition comprising at least any one of acrylic monomer, reactive monomer, coupling agent, surfactant, catalyst and water.
According to claim 1,
The synthetic rubber latex is an SB latex, CR latex, NB latex and IR Latex environmentally friendly automotive undercoat acrylic emulsion composition comprising any one or more selected from the group consisting of.
The method according to claim 1 or 2,
An environmentally friendly undercoating acrylic emulsion composition for automobiles comprising at least one selected from the group consisting of alkyl acrylate, alkyl methacrylate, acrylic acid and methacrylic acid reactive crosslinking agent.
According to claim 2,
The acrylic monomer is butyl (meth) acrylate, ethyl acrylate, methyl (meth) acrylate, acrylonitrile, alpha methyl styrene, 2-hydroxyitaconic acid, ethyl methacrylate, isoboryl methacrylate and acrylic acid meta An eco-friendly undercoating acrylic emulsion composition for at least one selected from the group consisting of acrylic acid.
According to claim 2,
The reactive monomer is selected from the group consisting of arylmethacrylate, grisidylmethacrylate, ethylene glycol dimethacrylate, crosslinking monomer, normal methylol acrylamide, N-butoxy methyl acrylamide and tert-butyl acylamide. Eco-friendly automotive undercoating acrylic emulsion composition comprising any one or more.
According to claim 2,
The coupling agent is N- (2-aminoethyl) -3-aminopropyl trimethoxysilane (N- (2-
aminoethyl) -3-aminopropyltrimethoxysilane, vinyltriethoxysilane, 3-glycidoxypropyl trimethoxysilane and methacryloxypropyl trimethoxysilane. Eco-friendly automotive undercoating acrylic emulsion composition comprising a.
According to claim 2,
The surfactants are SE-1025, SE-10N, RS-610 Aliphatic phosphate Ester, Poly erizable phosphate, CA-40S sodium salt sulfate alkyl ethoxylate (Sodium salt sulfate Alkyl Ethoxylate), CO-436 Ammonium Salt Sulfate Alkyl Ethoxylate and DS4 Sodium Dodecyl Bengen Sulfanate. Coated acrylic emulsion composition.
According to claim 2,
The catalyst is APS (ammonium persulphate, ammonium persulphate) characterized in that the environment-friendly automotive undercoat acrylic emulsion composition.
a) preparing a reaction vessel and a stirrer cylindrical fraction and adding 100 to 300 parts by weight of water and 1 to 10 parts by weight of surfactant to the reactor to warm to 80 ° C .;
b) pre-emulsifying the monomer tank after step a, including 50 to 150 parts by weight of water, 1 to 10 parts by weight of surfactant (emulsifier), 400 to 600 parts by weight of acrylic monomer and 10 to 30 parts by weight of reactive monomer;
c) After step b, adding 0.05 to 0.15 parts by weight of the catalyst to react dripping for 1 hour to 3 hours at 80 ° C to 90 ° C, and
d) A method for manufacturing an environment-friendly undercoating acrylic emulsion composition for an automobile, comprising the step of aging at 80 ° C to 90 ° C for 3 hours after step c to prepare an emulsion solution.
The method of claim 10,
The surfactant of step a) includes any one or more of SE-10N and RS-610, and the acrylic monomer of step b) is selected from butyl acrylate, methyl keta acrylate, styrene monomer, and isobornyl methacrylate. Including at least any one or more, the reactive monomer includes at least one of allyl methacrylate and glycidyl methacrylate, and the catalyst in step c) is an environmentally friendly vehicle characterized in that it is APS (ammonium persulfate). Preparation method for undercoating acrylic emulsion composition.