KR102148742B1 - Eco-friendly automotive undercoat acrylic emulsion composition for winter - Google Patents

Abstract

The present invention relates to an eco-friendly acrylic emulsion composition that reduces VOCs for automobile undercoating and improves the function of lowering the freezing point, and more particularly, adhesion, adhesion, and rust resistance when coating the lower and inner parts of a vehicle with air spray. The present invention relates to an undercoating acrylic emulsion composition for automobiles having excellent compatibility with synthetic rubber latex and the like. According to an embodiment of the present invention, acrylic emulsion 30 to 80 parts by weight, synthetic rubber latex 5 to 20 parts by weight, cold-resistant plasticizer 1 to 10 parts by weight, freeze-thaw stabilizer 1 to 10 parts by weight, inorganic filler 5 to 20 parts by weight And there is provided an eco-friendly automotive undercoating acrylic emulsion composition comprising 0.1 to 2 parts by weight of a dispersant. The present invention is eco-friendly with low VOC, does not contain 6 heavy metal substances, and is particularly easy to work even at low temperatures and provides the best rust prevention effect, cold resistance, sound absorption, sound insulation effect, etc.for winter season exclusive water-based undercoat. There is.

Description

Eco-friendly automotive undercoat acrylic emulsion composition for winter

The present invention relates to an eco-friendly acrylic emulsion composition that reduces VOCs for automobile undercoating and improves the function of lowering the freezing point, and more particularly, adhesion, adhesion, and rust resistance when coating the lower and inner parts of a vehicle with air spray. The present invention relates to an eco-friendly automotive undercoating acrylic emulsion composition that can be used exclusively in winter because of its excellent compatibility with synthetic rubber latex and the like.

In general, when a car is completed and shipped, undercoating is applied to important parts of the lower body of the car to prevent corrosion, while improving the quality of the car through sound insulation and rust prevention, but undercoating is not performed on the entire lower part of the car. Undercoating is done only in a very limited range. The lower part of the car is exposed to calcium chloride sprayed on the road when it snows in winter, rainwater in summer, salt water on the beach, etc., and corrosion occurs.In addition, when the car is operated, it is exposed to the impact that occurs when the stones scattered by the tire hit the lower part of the car. have. For this reason, users who have purchased a car use undercoat to prevent corrosion that may occur in the process of using the car for a long period of time to extend the life of the car and at the same time obtain a comfortable ride through absorption of noise or shock. Often performed. For example, while driving on a paved road, asphalt components and other foreign substances are continuously attached and deposited on the lower part of the vehicle to contaminate it, or in winter, calcium chloride sprayed on the road during snowfall is adsorbed to the lower part of the vehicle body. As it continues, it is the cause of accelerating the corrosion of the vehicle body.

In addition, it is contaminated by foreign substances such as fine dust (sand grains) generated in the process of driving off-road, and vibration or sand is scattered by the wheel, causing a lot of noise and shock as it collides with the lower part of the vehicle body. It is acting as a cause of deterioration. In order to solve such a problem, undercoating is performed on the lower part of the vehicle body, and this coating agent is coated on external exposed parts such as the under body and wheel house of the vehicle, thereby imparting sound insulation, rust prevention, and abrasion resistance to vibration and sound insulation of the vehicle. Can improve. However, in the past, various products such as PVC (soft), epoxy, and asphalt rubber were used among the compositions for performing automobile undercoating. Recently, water-based undercoating that meets environmental standards has been used. The effect was insignificant in terms of rust prevention and the like. Therefore, when coating on the underbody and inside of a car body, for example, on the underbody of a car, and on the outside exposed parts such as wheel house, it has excellent adhesion, adhesion and rust resistance, meets environmental standards, and is compatible with synthetic rubber latex. There is an urgent need to develop an acrylic emulsion with excellent compatibility. In particular, it is seen from the desperate need for a water-based undercoat exclusively for the winter season that is eco-friendly with low VOC, does not contain 6 heavy metal substances, is easy to work even at low temperatures, and provides the best anti-rust effect, cold resistance, sound absorption, and sound insulation effect. The invention was completed.

Domestic Registration Patent No. 10-1679908 (2016.11.21.) Domestic Registration Patent No. 10-1590905 (2016.01.27.) Domestic Registration Patent No. 10-1236415 (2013.02.18.)

An object of the present invention is 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 having excellent adhesion, adhesion, and rust prevention properties when coating the lower part and interior of a vehicle body of an automobile with air spray, and excellent compatibility with synthetic rubber latex and the like.

Another object of the present invention is to provide an environmentally friendly aqueous undercoat agent as an aqueous undercoat agent that provides workability and film formation in a low temperature phase.

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

According to an embodiment of the present invention, the acrylic emulsion is provided with an eco-friendly automotive undercoating acrylic emulsion composition comprising at least one or more 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, there is provided an eco-friendly automotive undercoating acrylic emulsion composition further comprising any one or more 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-hydroxy itaconic acid, ethyl meth acrylate, There is provided an eco-friendly automotive undercoating acrylic emulsion composition comprising at least one selected from the group consisting of isoboryl metaacrylate and acrylic acid metaacrylic acid.

According to an embodiment of the present invention, the reactive monomer is arylmethacrylate, glycidylmethacrylate, ethylene glycol dimethacrylate, normal methylol acrylamide, N-butoxy methyl acrylamide, and tert-butyl acylamide. There is provided an eco-friendly automotive undercoating acrylic emulsion composition comprising at least one selected from the group consisting of.

In an embodiment of the present invention, the coupling agent is N-(2-aminoethyl)-3-aminopropyltrimethoxysilane (N-(2-aminoethyl)-3-aminopropyltrimethoxysilane), vinyltriethoxysilane , 3-Glycidoxypropyl trimethoxysilane (3-Glycidoxypropyl trimethoxysilane) There is provided an eco-friendly automotive undercoating acrylic emulsion composition comprising at least one selected from the group consisting of methacryloxy propyl 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 alkylethoxylate (Sodium salt sulfate alkyl Ethoxylate), CO-436 ammonium salt sulfate alkyl ethoxylate (Amoniun alt sulfate alkyl Ethoxylate) and DS4 sodium dodecyl benzene sulfate (Sodium Dodecyl Bengen Sulfanate) An eco-friendly automotive undercoating acrylic emulsion composition comprising the above is provided.

According to an embodiment of the present invention, the catalyst is APS (ammonium persulphate, ammonium persulphate), an eco-friendly automotive undercoating acrylic emulsion composition is provided.

According to an embodiment of the present invention, preparing a reaction tank and a cylindrical separator for a stirrer, and heating 100 to 300 parts by weight of water and 1 to 10 parts by weight of a surfactant to the reaction tank to 80°C; Pre-emulsifying the monomer tank after step a, including 50 to 150 parts by weight of water, 1 to 10 parts by weight of an emulsifier, 400 to 600 parts by weight of an acrylic monomer, and 10 to 30 parts by weight of a reactive monomer; An eco-friendly vehicle comprising the step of preparing an emulsion by adding 0.05 to 0.15 parts by weight of the catalyst after step b and reacting dropwise at 80°C to 90°C for 1 hour to 3 hours and aging at 80°C to 90°C for 3 hours after step c A method for preparing an undercoating acrylic emulsion composition for use is provided.

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

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

In addition, the present invention is environmentally friendly with low VOC, does not contain 6 heavy metal substances, and is particularly easy to work at low temperatures and provides the best rust prevention effect, cold resistance, sound absorption, sound insulation effect, etc. It works.

The description of the present invention to be described below refers to specific embodiments in which the present invention may be practiced as an example. These embodiments are described in detail sufficient to enable a person skilled in the art to practice the present invention. It is to be understood that the various embodiments of the present invention are different from each other, 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 spirit and scope of the present invention in relation to one embodiment. In addition, it is to be understood that the position or arrangement of individual components in each disclosed embodiment may be changed without departing from the technical spirit and scope of the present invention.

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

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

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

According to an embodiment of the present invention, the acrylic emulsion is provided with an eco-friendly automotive undercoating acrylic emulsion composition comprising at least one or more of an acrylic monomer, a reactive monomer, a coupling agent, a surfactant, a catalyst, and water. In addition, a defoamer, a thickener, a dispersant, and a crosslinking agent may be further included to synthesize an undercoat acrylic emulsion for an automobile. If a crosslinking agent and a coupling agent are used for the net work structure of the emulsion, physical properties can be improved, and the crosslinking agent is N-methoxy methyl acrylamide, N-butoxy methyl acrylamide, etc., and the coupling agent is preferably 1 ) N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, 2) 3-Glycidoxypropyl trimethoxysilane 3 ) The use of 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. I 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-hyrooxy itaconic acid, ethyl meth acrylate, There is provided an eco-friendly automotive undercoating acrylic emulsion composition comprising at least one selected from the group consisting of isoboryl metaacrylate and acrylic acid metaacrylic acid.

According to an embodiment of the present invention, the reactive monomer is arylmeth acrylate, glycidylmeth acrylate, ethylene glycol dimethacrylate, normal methylol acrylamide, N-butoxy methyl acrylamide and tert-butyl acylamide. An eco-friendly automotive undercoating acrylic emulsion composition comprising at least one selected from the group consisting of is provided. The reactive monomer may be used to improve the water resistance of the acrylic emulsion and the adhesion to the substrate.

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

According to an embodiment of the present invention, any one or more selected from the group consisting of anionic, reactive emulsifiers and phosphorus surfactants may be used as the surfactant. It is used for reactive emulsifier (anion) and rust prevention property, and two or more types may be used, and the surfactants are SE-1025, SE-10N, RS-610 Aliphatic phosphate Ester, polyerysable phosphate ( Poly erizable phosphate), CA-40S Sodium salt sulfate alkyl Ethoxylate, CO-436 Ammonium salt sulfate alkyl Ethoxylate and DS4 sodium dodecyl benzene sulfate (Sodium Dodecyl Bengen Sulfanate) is provided with an eco-friendly automotive undercoating acrylic emulsion composition comprising 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, and APS (ammonium persulphate), BPO (Benzoyl Peroxide), AIBN (2,2'-Azobisisobutyronitrile) and DTBPO (Di-Tert-Butyl Peroxide) ) At least one or more selected from the group consisting of can be used, preferably APS (ammonium persulphate) can be used.

According to an embodiment of the present invention, the synthetic rubber latex is provided with an eco-friendly undercoating acrylic emulsion composition for automobiles using 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 may be used as a solvent, and may be used to adjust the viscosity of an undercoat acrylic emulsion composition for an automobile. In addition, water or eco-friendly solvents (Ethanol) can be used for the VOC minimization process. In addition, any one or more selected from the group consisting of alkyl acrylate, alkyl methacrylate, acrylic acid, and methacrylic acid reactive crosslinking agents may be used to prevent corrosion caused by salt water. In addition, as a method of improving the cold resistance for forming a coating film at low temperatures, it provides the most suitable cold resistance such as the use of synthetic rubber (SBR, NBR), addition of a cold-resistant plasticizer DBS, and freeze-thaw stabilizers EG (Ethylene Glycol) and DEG (Diethylene Glycol). We provide optimized products.

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

According to an embodiment of the present invention, the antifoaming agent may be used to prevent bubbles from being generated when a coating film is coated on the underside or inside of an automobile body by using an undercoating acrylic emulsion composition for automobiles. SAMNOPCO NXZ (manufactured by NopcoChemical), BYK-190 (manufactured by BYK), and Tego 760 (manufactured by Evonik) may be used.

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

According to an 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 undercoating composition for automobiles, and the dispersant may be BYK-190 (manufactured by BYK). Alternatively, any one or more selected from Tego 760W (manufactured by Evonik) may be used.

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

According to an embodiment of the present invention, preparing a reaction tank and a cylindrical separator for a stirrer, and heating 100 to 300 parts by weight of water and 1 to 10 parts by weight of a surfactant to the reaction tank to 80°C; Pre-emulsifying the monomer tank after step a, including 50 to 150 parts by weight of water, 1 to 10 parts by weight of an emulsifier, 400 to 600 parts by weight of an acrylic monomer, and 10 to 30 parts by weight of a reactive monomer; After step b, adding 0.05 to 0.15 parts by weight of the catalyst and reacting dropwise to 80°C to 90°C for 1 hour to 3 hours; And there is provided a method for producing an eco-friendly undercoat acrylic emulsion composition for automobiles comprising the step of preparing an emulsion by aging at 80°C to 90°C for 3 hours after step c.

According to an embodiment of the present invention, a reaction tank, a cooler, a stirrer, and a cylindrical separator are prepared for the emulsion reaction, a surfactant and water are added to the reaction tank, and the surfactant is added to heat 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, a pre-emulsion and a catalyst are added dropwise for 2 hours, and the reaction is aged at 82°C to 86°C for 2 hours.

According to an embodiment of the present invention, the monomer may be ethyl acrylate, butylo (meth) acrylate, 2-ethyl hexyl acrylate, acrylonitrile, di-methyl styrene, and two or more of them may be 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 of step a) includes any one or more of SE-10N and RS-610, and the acrylic monomer of step b) is butyl acrylate, methyl methacrylate, styrene monomer And at least any one or more of isobornyl methacrylate, the reactive monomer includes any one or more of allyl methacrylate and glycidyl methacrylate, and the catalyst of step c) is APS (ammonium persulfate ), an eco-friendly automotive undercoating acrylic emulsion composition manufacturing method is provided.

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

Acrylic emulsion manufacturing

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 the surfactant is added to heat to 80°C. Separately, an acrylic monomer emulsifier is pre-emulsified. (The reaction method at this time is the Retox method)

The pre-emulsion and catalyst were added dropwise for 2 hours, and the reaction was 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, and the like may be used, and three or more of them may be used.

In addition, one or more of 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. Physical properties can be improved by using a crosslinking monomer and a coupling agent for the net work structure of the emulsion. In this case, the crosslinking agent used is N-methoxy methyl acrylamide, N-butoxy methyl acrylamide, etc., and the coupling agent is preferably 1) N-(2-aminoethyl)-3-aminopropyltrimethoxy It is provided to use silane (N-(2-aminoethyl)-3 aminopropyltrimethoxysilane, 2) 3-Glycidoxypropyl trimethoxysilane 3) Vinyltriethoxysilane, but limited thereto. It doesn't work.

In addition, surfactants are reactive emulsifiers (anion) and surfactants are SE-1025, SE-10N, RS-610 Aliphatic phosphate Ester, Poly erizable phosphate, CA- 40S Sodium salt sulfate alkyl Ethoxylate, CO-436 Ammonium salt alkyl ethoxylate (Amoniun alt sulfate alkyl Ethoxylate) and DS4 sodium dodecyl benzene sulfate (Sodium Dodecyl Bengen Sulfanate) group consisting of It may include any one or more selected from. The emulsion (acrylic) produced in this way produces a product 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 an automobile according to the present invention will be described in more detail.

<Example 1>

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

<Example 2>

For the emulsion reaction, a reaction tank and a cylindrical separator filter were prepared, and 200 g of water, 3 g of surfactant SE-10N, and 2 g of RS-610 were added to the reaction tank and heated to 80°C. In addition, 100g of water, 3g of emulsifier LA40N, and 3g of SDBS are put in the monomer tank, and the monomer BAM 200g, MMA200g, SM 40g, MAA 5g, IBOMA 40g, OFS6300 10g are added to emulsify. After that, the catalyst (with 0.1 g of APS was added dropwise for 2 hours at 82~86℃ and then aged at 82~86℃ for 3 hours to obtain an emulsion.

<Comparative Example 1>

Put 200g of water into a previously prepared reaction tank, add 2g of emulsifier LA40N, 2g of SDBS, and heat up to 80℃, add 100g of water, 4g of emulsifier LA40N, 4g of SDBS to the monomer tank, 150g of monomer BAM, 250g of MMA, 40g of SM, 5g of MAA, 40g of IBOMA , 10g of AMA and 20g of GMA are added to the emulsion, followed by reaction with 0.1g of catalyst APS at 82~86℃ for 2 hours, and then aged at 82~86℃ for 3 hours to obtain an emulsion.

<Comparative Example 2>

Put 200g of water into the prepared reaction tank, 2g of emulsifier SE10N, 2g of SDBS, and warm to 80℃, add 100g of water, 2g of emulsifier SE10N, 2g of SDBS to the monomer tank, 250g of monomer BAM, 170g of MMA, 40g of SM, 5g of MAA, 10g of AMA , After emulsifying with 20 g of GMA, dropwise reaction with 0.1 g of catalyst APS at 82~86℃ for 2 hours, and then aged at 82~86℃ for 3 hours to obtain an emulsion.

<Comparative Example 3>

Put 200g of water into a prepared reaction tank, 2g of emulsifier RS610, 2g of LA40N, and warm to 80℃, add 100g of water, 2g of emulsifier LA40N, 4g of SDBS to the monomer tank, 250g of monomer BAM, 130g of MMA, 40g of SM, 5g of MAA, 40g of IBOMA , OFS6030 10g and 10g of GMA are added and emulsified. After reacting for 2 hours at 82~86℃ with 0.1g of catalyst APS, it is aged at 82~86℃ for 3 hours to obtain an emulsion.

<Comparative Example 4>

Put 200g of water into the prepared reaction tank, 2g of emulsifier SE10N, 2g of LA40N, and warm to 80℃, add 100g of water and LA40N as an emulsifier to the monomer tank, 200g of monomer BAM, 200g of MMA, 30g of SM, 5g of MAA, 40g of IBOMA, 20g of GMA. After adding and emulsifying, reaction with 0.1g of catalyst APS at 82~86℃ for 2 hours and then aging at 82~86℃ for 3 hours to obtain emulsion.

<Comparative Example 5>

Put 200g of water into the prepared reaction tank, add 3g of emulsifier SE10N, 2g of RS610, and heat up to 80℃, add 100g of water, 5g of emulsifier LA40N, 4g of SDBS to the monomer tank, 250g of monomer BAM, 150g of MMA, 30g of SM, 5g of MAA, 40g of IBOMA , OFS6030 10g, AMA 10g, emulsify, dropwise reaction with 0.1g of catalyst APS at 82~86℃ for 2 hours, and then aged at 82~86℃ for 3 hours to obtain an emulsion.

By blending the emulsions prepared according to Examples 1 and 2 and Comparative Examples 1 to 5, an eco-friendly automotive undercoating acrylic emulsion was prepared. The blending 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 Manufacturing Example 1 Manufacturing Example 2 Manufacturing Example 3 Manufacturing Example 4 Manufacturing Example 5 Manufacturing Example 6 Manufacturing 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 eco-friendly automotive undercoating acrylic emulsion prepared in 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 poor rust prevention and adhesion.

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

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

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

In the above, a preferred embodiment of the present invention has been described, but those of ordinary skill in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. I will be able to. Therefore, it should be understood that the exemplary embodiment described above is illustrative in all respects and is not limiting.

Claims (11)

Acrylic emulsion 30 to 80 parts by weight, synthetic rubber latex 5 to 20 parts by weight, cold-resistant plasticizer 1 to 10 parts by weight, freeze-thaw stabilizer 1 to 10 parts by weight, inorganic filler 5 to 20 parts by weight and dispersant 0.1 to Including 2 parts by weight,
The acrylic emulsion contains at least one or more of an acrylic monomer, a reactive monomer, a coupling agent, a surfactant, a catalyst, and water,
The synthetic rubber latex includes any one or more selected from the group consisting of SB latex, CR latex, NB latex, and IR Latex,
The cold-resistant plasticizer is DBS (Dibutyl decanedioate),
The freeze-thaw stabilizer is an eco-friendly winter-only undercoating acrylic emulsion composition for automobiles, characterized in that it comprises at least one selected from EG (Ethylene Glycol) and DEG (Diethylene glycol).
delete delete The method of claim 1,
An eco-friendly winter-only 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.
The method of claim 1,
The acrylic monomers are butyl (meth) acrylate, ethyl acrylate, methyl (meth) acrylate, acrylonitrile, alpha methyl styrene, 2-hydroxy itaconic acid, ethyl meth acrylate, isoboryl methacrylate, and acrylic acid meta. An undercoating acrylic emulsion composition for eco-friendly automobiles containing at least one selected from the group consisting of acrylic acid.
The method of claim 1,
The reactive monomer is at least one selected from the group consisting of arylmeth acrylate, glycidylmeth acrylate, ethylene glycol dimethacrylate, normal methylol acrylamide, N-butoxy methyl acrylamide, and tert-butyl acylamide. Eco-friendly automotive winter-only undercoat acrylic emulsion composition comprising a.
The method of claim 1,
The coupling agent is N-(2-aminoethyl)-3-aminopropyltrimethoxysilane (N-(2-
aminoethyl)-3-aminopropyltrimethoxysilane), vinyltriethoxysilane, 3-Glycidoxypropyl trimethoxysilane, and at least one selected from the group consisting of methacryloxypropyl trimethoxysilane Eco-friendly automotive winter-only undercoat acrylic emulsion composition comprising a.
The method of claim 1,
The surfactants are SE-1025, SE-10N, RS-610 Aliphatic phosphate Ester, Poly erizable phosphate, CA-40S Sodium salt sulfate alkylethoxylate (Sodium salt sulfate). alkyl Ethoxylate), CO-436 ammonium salt sulfate alkyl ethoxylate (Amoniun alt sulfate alkyl Ethoxylate) and DS4 sodium dodecyl benzene sulfate (Sodium Dodecyl Bengen Sulfanate). Exclusive undercoating acrylic emulsion composition.
The method of claim 1,
The catalyst is APS (ammonium persulphate, ammonium persulphate), characterized in that the eco-friendly automotive winter-only undercoating acrylic emulsion composition.
a) preparing a reaction tank and a cylindrical separator for a stirrer, adding 100 to 300 parts by weight of water and 1 to 10 parts by weight of a surfactant to the reaction tank, and heating 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 a surfactant (emulsifier), 400 to 600 parts by weight of an acrylic monomer, and 10 to 30 parts by weight of a reactive monomer;
c) adding 0.05 to 0.15 parts by weight of a catalyst after step b, and performing dropwise reaction at 80°C to 90°C for 1 hour to 3 hours, and
d) preparing an emulsion by aging at 80°C to 90°C for 3 hours after step c; including,
Based on 30 to 80 parts by weight of the emulsion of step d, 5 to 20 parts by weight of synthetic rubber latex, 1 to 10 parts by weight of a cold-resistant plasticizer, 1 to 10 parts by weight of a freeze-thaw stabilizer, 5 to 20 parts by weight of an inorganic filler, and 0.1 parts by weight of a dispersant It contains to 2 parts by weight,
The synthetic rubber latex includes any one or more selected from the group consisting of SB latex, CR latex, NB latex, and IR Latex,
The cold-resistant plasticizer is DBS (Dibutyl decanedioate),
The freeze-thaw stabilizer is an eco-friendly winter-only undercoat acrylic emulsion composition manufacturing method for automobiles, characterized in that it contains at least one selected from EG (Ethylene Glycol) and DEG (Diethylene glycol).
The method of claim 10,
The surfactant of step a) contains any one or more of SE-10N and RS-610, and the acrylic monomer of step b) is from butyl acrylate, methyl methacrylate, styrene monomer and isobornyl methacrylate. Including at least any one or more, the reactive monomer includes any one or more of allyl methacrylate and glycidyl methacrylate, and the catalyst of step c) is an eco-friendly vehicle, characterized in that APS (ammonium persulfate) Method for producing an undercoating acrylic emulsion composition for winter season only.