KR100758294B1 - A low-bake base and top coating paint composition and method therefor - Google Patents

A low-bake base and top coating paint composition and method therefor Download PDF

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KR100758294B1
KR100758294B1 KR1020050097868A KR20050097868A KR100758294B1 KR 100758294 B1 KR100758294 B1 KR 100758294B1 KR 1020050097868 A KR1020050097868 A KR 1020050097868A KR 20050097868 A KR20050097868 A KR 20050097868A KR 100758294 B1 KR100758294 B1 KR 100758294B1
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weight
water
agent
dispersed
resin
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KR20070042230A (en
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백면현
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대영고분자 주식회사
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/80Processes for incorporating ingredients
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D133/00Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C09D133/04Homopolymers or copolymers of esters
    • C09D133/14Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04Polyurethanes
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04Polyurethanes
    • C09D175/14Polyurethanes having carbon-to-carbon unsaturated bonds
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/60Additives non-macromolecular
    • C09D7/61Additives non-macromolecular inorganic

Abstract

본 발명은 저온 소부용 하도 및 상도 도료 조성물과 이의 제조 방법에 관한 것으로, 보다 상세하게는 저온 소부에 의한 수분과 조막조제의 증발로 강한 도막이 형성되고 대기에 방출되는 유기용제가 거의 없는 친환경 수성도료 조성물에 관한 것이다.The present invention relates to a low-temperature baking coat and top coat composition and a method for manufacturing the same, and more particularly, an environmentally friendly water-based paint having a strong coating film formed by evaporation of water and a film preparation aid by low-temperature baking and having almost no organic solvent released to the atmosphere. It relates to a composition.

도료 조성물, 우레탄 아크릴레이트, 플라스틱 도장, 친환경, 저온 소부 Paint composition, urethane acrylate, plastic coating, eco-friendly, low temperature baking

Description

저온 소부용 하도 및 상도 도료 조성물과 이의 제조 방법{A low-bake base and top coating paint composition and method therefor}A low-bake base and top coating paint composition and method therefor}

본 발명은 저온 소부용 하도 및 상도 도료 조성물과 이의 제조 방법에 관한 것으로, 보다 상세하게는 저온 소부에 의한 수분과 조막조제의 증발로 강한 도막이 형성되고 대기에 방출되는 유기용제가 거의 없는 친환경 수성도료 조성물에 관한 것이다.The present invention relates to a low-temperature baking coat and top coat composition and a method for manufacturing the same, and more particularly, an environmentally friendly water-based paint having a strong coating film formed by evaporation of water and a film preparation aid by low-temperature baking and having almost no organic solvent released to the atmosphere. It relates to a composition.

플라스틱 성형물은 가전제품, 핸드폰, 자동차, 전자 장비, 화장품 용기 등의 다양한 산업 분야에 적용되고 있으며, 사용 용도는 점점 증가하고 있다. 이와 같은 플라스틱 성형물은 표면 보호, 경도 확보, 광택 향상 및 내구성 향상 등의 목적을 위해 광중합 건조형의 UV도료, 열중합 건조형의 우레탄(1액형, 2액형) 등이 주로 사용되고 있다.Plastic moldings are applied to various industrial fields such as home appliances, mobile phones, automobiles, electronic equipment, cosmetic containers, etc., and their use is increasing. Such plastic moldings are mainly used for UV polymerization of photopolymerization type and urethane (1 part type, 2 part type) of thermal polymerization drying type for the purpose of surface protection, securing hardness, improving gloss and improving durability.

이 중, UV 도료를 도장하는 방법은, 먼저 하도(base coating)에 비닐, 아크릴계 수지를 안료와 혼합하여 작업한다. 이후, 상도(top coating)에 폴리에스테르-아크릴레이트, 에폭시-아크릴레이트 또는 우레탄-아크릴레이트와 같은 광중합 원료를 사용한 UV도료를 도장한다.Among these, the method of coating a UV coating material works by first mixing vinyl and acrylic resin with a pigment in base coating. Then, UV coating using a photopolymerization raw material such as polyester-acrylate, epoxy-acrylate or urethane-acrylate is applied to the top coating.

우레탄 1액형 또는 2액형 으로 도장하는 방법은, 먼저 하도에 비닐, 아크릴계 수지를 안료와 혼합하여 작업한다. 이후 상도에 비닐, 아크릴계 수지를 안료와 혼합하여 래커(lacquer) 형태로 도장하거나(우레탄 1액형), 아크릴 폴리올과 폴리에스테르 폴리올을 혼합하여 도장(우레탄 2액형)한다.In the method of coating one-component or two-component urethane, first, a vinyl and an acrylic resin are mixed with a pigment in a coat. Thereafter, vinyl and acrylic resins are mixed with pigments to coat the lacquer (lacquer) or acrylic polyols and polyester polyols are mixed (urethane two-component).

우레탄 1액형 또는 2액형 으로 도장하는 방법은, 먼저 하도에 비닐, 아크릴계,우레탄 수지를 안료와 혼합하여 작업한다. 이후 상도에 우레탄 수지등을 래커(lacquer) 형태로 도장하거나(우레탄 1액형), 아크릴 폴리올과 폴리에스테르 폴리올을 경화제를 혼합하여 도장(우레탄 2액형)한다.In the method of coating one-component or two-component urethane, first, a vinyl, acrylic, urethane resin is mixed with a pigment in a coat. Later, a urethane resin or the like is coated in a lacquer (lacquer) form or an acrylic polyol and a polyester polyol are mixed and mixed with a curing agent (urethane 2-component).

전술된 도장 방법들은 휘발성 유기 화합물(VOC: Volatile Organic Compounds, 이하 별다른 설명이 없는 한 'VOC'라 한다)에 대한 환경 규제의 강화의 영향으로 권장되지 못하는 문제가 있다. 즉, 가전 제품이나 핸드폰과 같이 소비자의 신체에 직접 접촉이 가능한 전자 소재 분야에서는 특히 유기용제보다 수용성 소재의 제품 개발이 요구된다.The above-described coating methods have a problem that cannot be recommended due to the strengthening of environmental regulations on Volatile Organic Compounds (VOCs, hereinafter referred to as 'VOC') unless otherwise stated. In other words, in the field of electronic materials that can be in direct contact with the consumer's body, such as home appliances or mobile phones, in particular, the development of water-soluble materials rather than organic solvents is required.

이와 같은 요구에 부응하여 아크릴 에멀젼, 수분산 우레탄 에멀젼, 우레탄-아크릴 수분산 등의 수지와, 수용성 메탈릭, 나노 크기를 갖는 안료 입자, 수성전용 첨가제 등이 개발되었다.In response to such demands, resins such as acrylic emulsions, water-dispersed urethane emulsions, and urethane-acrylic water dispersions, water-soluble metallic particles, nano-sized pigment particles, aqueous additives, and the like have been developed.

이와 같이 개발된 수성 도료의 경우, 전술된 VOC에 대한 규제의 영향을 받지 않는 장점이 있으나, 외관, 작업성, 양산성, 신뢰성 등과 같은 품질 요구에 부합할 수 없는 단점이 상존한다.In the case of the aqueous paint thus developed, there is an advantage that is not affected by the above-mentioned regulations on VOC, but there are disadvantages that cannot meet quality requirements such as appearance, workability, mass productivity, reliability, and the like.

본 발명은 전술된 종래기술에 따른 문제점들을 해결하기 위하여 도출된 것으로, 부착성, 외관, 광택도, 내마모성, 내알코올성, 내후성, 내산성, 내화장품성, 내열탕성 등과 같은 신뢰성을 만족할 수 있는 저온 소부용 하도 및 상도 도료 조성물과 이의 제조 방법의 제공을 목적으로 한다.The present invention is derived to solve the problems according to the prior art described above, low temperature that can satisfy the reliability, such as adhesion, appearance, gloss, wear resistance, alcohol resistance, weather resistance, acid resistance, cosmetic resistance, hot water resistance, etc. It is an object of the present invention to provide a baking coating and a top coat composition and a method for producing the same.

전술된 목적을 달성하기 위하여, 본 발명의 실시형태에 따른 저온 소부용 하도 메탈릭 도료 조성물의 제조 방법은, 수분산 우레탄 수지 또는 우레탄-아크릴 수분산 수지 20~60중량%에 이온교환수 5~30중량%를 첨가한 후 교반하는 제1단계; 교반상태를 유지하면서, 표면평활제 0.1~1.0중량%, 습윤제 0.1~1.0중량%, 분산제 0.1~1.0중량%, 소포제 0.1~1.0중량% 및 조막조제 5~20중량%를 첨가하여 혼합 용액이 균일상을 유지할 때까지 기포 발생을 억제하면서 분산 및 교반하는 제2단계; 수성용 알루미늄 페이스트 3~10중량%, 분산제 0.1~1.0중량% 및 조막조제 3~10중량%를 별도 용기에서 웨팅 교반한 후, 상기 제2단계의 혼합 용액에 투입하여 교반하는 제3-a단계 및 증점제 0.5~10중량%를 첨가하여 전체 혼합 용액의 점도를 50~60KU로 맞추고, 중화제 0.1~5.0중량%를 첨가하여 혼합 용액의 pH를 7.5~8.5로 맞춘 후 상온 상태에서 보관하는 제4단계를 포함한다.In order to achieve the above object, the method for producing a low-temperature baking undercoat metallic coating composition according to an embodiment of the present invention is ion exchanged water 5-30 to 20-60 wt% of a water-dispersed urethane resin or a urethane-acrylic water-dispersed resin. A first step of stirring after adding weight%; While maintaining the stirring state, 0.1 to 1.0% by weight of surface smoothing agent, 0.1 to 1.0% by weight of wetting agent, 0.1 to 1.0% by weight of dispersant, 0.1 to 1.0% by weight of antifoaming agent and 5 to 20% by weight of film forming aid were added A second step of dispersing and stirring while suppressing bubble generation until the daily routine is maintained; 3-a wt% of the aqueous aluminum paste, 0.1-1.0 wt% of the dispersant, and 3-10 wt% of the film forming aid are wet-stirred in a separate container, and then added to the mixed solution of the second step to stir. And adding 0.5 to 10 wt% of a thickener to adjust the viscosity of the entire mixed solution to 50 to 60 KU, adding 0.1 to 5.0 wt% of a neutralizer to adjust the pH of the mixed solution to 7.5 to 8.5, and then storing it at room temperature. It includes.

또한 전술된 목적을 달성하기 위하여, 본 발명의 실시형태에 따른 저온 소부용 하도 메탈릭 도료 조성물은, 전술된 제조 방법에 의해 제조되고, 수분산 우레탄 수지 또는 우레탄-아크릴 수분산 수지 20~60중량%, 이온교환수 5~30중량%, 표면 평활제 0.1~1.0중량%, 습윤제 0.1~1.0중량%, 분산제 0.2~2.0중량%, 소포제 0.1~1.0중 량%, 조막조제 8~30중량%, 수성용 알루미늄 페이스트 3~10중량%, 증점제 0.5~10중량% 및 중화제 0.1~5중량%를 혼합하여 제조된다.In addition, in order to achieve the above object, the low-temperature baking undercoat metallic coating composition according to the embodiment of the present invention is produced by the above-described manufacturing method, 20 to 60% by weight of a water dispersion urethane resin or a urethane-acrylic water dispersion resin , 5-30% by weight of ion-exchanged water, 0.1-1.0% by weight of surface smoothing agent, 0.1-1.0% by weight of wetting agent, 0.2-2.0% by weight of dispersant, 0.1-1.0% by weight of antifoaming agent, 8-30% by weight of film preparation, aqueous It is prepared by mixing 3-10 wt% of the aluminum paste for use, 0.5-10 wt% of the thickener and 0.1-5 wt% of the neutralizer.

또한 전술된 목적을 달성하기 위하여, 본 발명의 실시형태에 따른 저온 소부용 하도 솔리드 도료 조성물의 제조 방법은, 수분산 우레탄 수지 또는 우레탄-아크릴 수분산 수지 20~60중량%에 이온교환수 5~30중량%를 첨가한 후 교반하는 제1단계; 교반상태를 유지하면서, 표면평활제 0.1~1.0중량%, 습윤제 0.1~1.0중량%, 분산제 0.1~1.0중량%, 소포제 0.1~1.0중량% 및 조막조제 5~20중량%를 첨가하여 혼합 용액이 균일상을 유지할 때까지 기포 발생을 억제하면서 교반하는 제2단계; 수분산 우레탄 수지 또는 우레탄-아크릴 수분산 수지에 5㎛ 이하로 분산된 안료, 분산제 및 이온교환수로 구성된 조색제 5~30중량%를 투입하여 교반하는 제3-b단계 및 증점제 0.5~10중량%를 첨가하여 전체 혼합 용액의 점도를50~60KU로 맞추고, 중화제 0.1~5.0중량%를 첨가하여 혼합 용액의 pH를 7.5~8.5로 맞춘 후 상온 상태에서 보관하는 제4단계를 포함한다.Moreover, in order to achieve the above-mentioned object, the manufacturing method of the low temperature baking composition undercoat solid coating composition which concerns on embodiment of this invention is ion-exchange water 5-20 to 20-60 weight% of water dispersion urethane resin or urethane-acrylic water dispersion resin. A first step of stirring after adding 30% by weight; While maintaining the stirring state, 0.1 to 1.0% by weight of surface smoothing agent, 0.1 to 1.0% by weight of wetting agent, 0.1 to 1.0% by weight of dispersant, 0.1 to 1.0% by weight of antifoaming agent and 5 to 20% by weight of film forming aid were added A second step of stirring while suppressing bubble generation until the daily routine is maintained; Step 3-b and 0.5 to 10% by weight of a step 3b and a thickening agent, which are prepared by stirring 5-30% by weight of a colorant comprising a pigment, a dispersant, and ion-exchanged water dispersed in a water-dispersed urethane resin or a urethane-acrylic water-dispersed resin at 5 μm or less. Adding a to adjust the viscosity of the entire mixed solution to 50 to 60 KU, adding a neutralizing agent to 0.1 to 5.0% by weight to adjust the pH of the mixed solution to 7.5 to 8.5, and storing the product at room temperature.

또한 전술된 목적을 달성하기 위하여, 본 발명의 실시형태에 따른 저온 소부용 하도 솔리드 도료 조성물은, 전술된 제조 방법에 의해 제조되고, 수분산 우레탄 수지 또는 우레탄-아크릴 수분산 수지 20~60중량%, 이온교환수 5~30중량%, 표면 평활제 0.1~1.0중량%, 습윤제 0.1~1.0중량%, 분산제 0.1~1.0중량%, 소포제 0.1~1.0중량%, 조막조제 5~20중량%, 5㎛ 이하로 분산된 안료, 분산제 및 이온교환수로 구성된 조색제 5~30중량% 및 증점제 0.5~10중량% 및 중화제 0.1~5중량%를 혼합하여 제조된다.Further, in order to achieve the above object, the low-temperature baking coating solid coating composition according to the embodiment of the present invention is produced by the above-described manufacturing method, 20 to 60% by weight of a water dispersion urethane resin or a urethane-acrylic water dispersion resin , 5-30% by weight of ion-exchanged water, 0.1-1.0% by weight of surface leveling agent, 0.1-1.0% by weight of wetting agent, 0.1-1.0% by weight of dispersant, 0.1-1.0% by weight of antifoaming agent, 5-20% by weight of film forming agent, 5㎛ It is prepared by mixing 5-30% by weight of a colorant composed of a pigment, a dispersant and ion-exchanged water dispersed below, 0.5-10% by weight of a thickener and 0.1-5% by weight of a neutralizing agent.

또한 전술된 목적을 달성하기 위하여, 본 발명의 실시형태에 따른 저온 소부용 상도 도료 조성물의 제조 방법은, 수분산 우레탄 수지 또는 아크릴 포리올 에멀젼 수지 60~90중량%와 이온교환수 5~15중량%를 혼합하여 교반하는 제1단계; 조막조제 5~15중량%, 표면평활제 0.1~1.0중량% 및 소포제 0.1~1.0중량%를 추가한 후, 혼합 용액이 균일상을 유지할 때까지 기포발생을 억제하면서 교반한 후 상온에서 보관하는 제2단계 및 도장 작업시에 수성경화제 10~30중량%를 추가하여 혼합 용액을 제조하는 제3단계를 포함한다.In addition, in order to achieve the above object, the method for producing a low-temperature baking coating composition according to an embodiment of the present invention, 60 to 90% by weight of water-dispersed urethane resin or acrylic polyolol emulsion resin and 5 to 15% by weight of ion-exchanged water Mixing and stirring the first step; 5-15% by weight of film forming agent, 0.1-1.0% by weight of surface leveling agent and 0.1-1.0% by weight of antifoaming agent, and then stirring while suppressing foaming until the mixed solution maintains a homogeneous phase and then stored at room temperature Step 2 and the third step of preparing a mixed solution by adding 10 to 30% by weight of the aqueous hardener during the painting operation.

또한 전술된 목적을 달성하기 위하여, 본 발명의 실시형태에 따른 저온 소부용 상도 도료 조성물은, 전술된 제조 방법에 의해 제조되고, 수분산 우레탄 수지 또는 아크릴 포리올 에멀젼 수지 60~90중량%, 이온교환수 5~15중량%, 조용제 5~15중량%, 표면평활제 0.1~1.0중량%, 소포제 0.1~1.0중량% 및 수성경화제 10~30중량%를 혼합하여 제조된다.In addition, in order to achieve the above object, the low-temperature baking coating composition according to the embodiment of the present invention is prepared by the above-described manufacturing method, 60-90% by weight of water-dispersed urethane resin or acrylic polyol emulsion resin, ion exchange It is prepared by mixing 5 to 15% by weight of water, 5 to 15% by weight of a solvent, 0.1 to 1.0% by weight of a surface leveling agent, 0.1 to 1.0% by weight of an antifoaming agent, and 10 to 30% by weight of an aqueous hardener.

이하에서, 본 발명의 실시예들이 기술된다.In the following, embodiments of the present invention are described.

하기에서 본 발명을 설명함에 있어서, 관련된 공지 기능 또는 구성에 대한 구체적인 설명이 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우에는 그 상세한 설명은 생략될 것이다. 또한 후술되는 용어들은 본 발명에서의 기능을 고려하여 설정된 용어들로서 이 용어들은 제품을 생산하는 생산자의 의도 또는 관례에 따라 달라질 수 있으며, 용어들의 정의는 본 명세서 전반에 걸친 내용을 토대로 내려져야 할 것이다.In the following description of the present invention, if it is determined that detailed descriptions of related known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In addition, the terms to be described later are terms set in consideration of functions in the present invention, and these terms may vary according to the intention or custom of the producer producing the product, and the definition of the terms should be made based on the contents throughout the present specification.

(저온 소부용 하도 도료 조성물)(Low-temperature baking coating composition)

먼저, 본 실시예에 따른 저온 소부용 하도 도료 조성물과 이의 제조 과정을 설명한다.First, the low-temperature baking coating composition according to the present embodiment and a manufacturing process thereof will be described.

제1단계, 수분산 우레탄 수지 또는 우레탄-아크릴 수분산 수지 20~60중량%에 이온교환수 5~30중량%를 첨가한 후 교반한다.In the first step, 5-30 wt% of ion-exchanged water is added to 20-60 wt% of the water-dispersed urethane resin or the urethane-acrylic water-dispersed resin and then stirred.

잘 알려진 바와 같이, 수분산 우레탄 수지 또는 우레탄-아크릴 수분산 수지는 경도, 작업성, 내용제성 및 내화학성이 우수하다. 전술된 수지의 함량이 20중량% 미만으로 함유되는 경우에는 부착성, 표면 상태 등의 물성이 저하되고, 40중량%를 초과하는 경우에는 점도 상승의 문제가 있다. 그러나 본 실시예에 따른 저온 소부용 하도 도료 조성물은 수분산우레탄수지를 50~90중량%,우레탄-아크릴수지를 10~30중량%를 사용하고, 점도 상승시에는 이온교환수와 조막조제를 사용하여 도료 조성물로 사용될 수 있을 정도의 점도를 유지할 수 있게 한다.As is well known, water-dispersed urethane resins or urethane-acrylic water-dispersed resins are excellent in hardness, workability, solvent resistance and chemical resistance. When the content of the above-mentioned resin is contained in less than 20% by weight, physical properties such as adhesion and surface state are lowered, and when it exceeds 40% by weight, there is a problem of viscosity increase. However, the low-temperature baking coating composition according to the present embodiment uses 50 to 90% by weight of water-dispersed urethane resin and 10 to 30% by weight of urethane-acrylic resin, and when the viscosity is increased, ion-exchanged water and film preparation are used. It is possible to maintain a viscosity that can be used as a coating composition.

용제는 안료의 분산을 양호하게 하여 수성 도료의 색감에 영향을 주며, 수지의 점도 조절, 부착성 및 최저 도막 형성 온도 등에 관여된다. 본 실시예에서는 5~30중량%의 이온교환수를 사용하는데, 이온교환수가 5중량% 미만으로 첨가되는 경우에는 점도가 높아져 도장 작업시 색감이 떨어지고, 작업성이 나빠지며, 이색 등의 표면상태 저하성이 나타나고, 30중량%를 초과하여 첨가되는 경우에는 유동성(rheology) 조절이 어렵고, 표면장력이 커져서 표면상태, 은폐력 및 부위의 색감 저하가 발생된다.The solvent improves the dispersion of the pigment and affects the color of the aqueous coating, and is involved in the viscosity control of the resin, adhesion, and the minimum coating film formation temperature. In this embodiment, 5 to 30% by weight of ion-exchanged water is used, but when ion-exchanged water is added at less than 5% by weight, the viscosity becomes high, resulting in poor color during painting, poor workability, and surface conditions such as dichroism. When deterioration appears and when added in excess of 30% by weight, it is difficult to control rheology, and the surface tension is increased, resulting in deterioration of the surface state, hiding power, and color of the site.

제2단계, 교반 상태를 유지하면서, 표면 평활제 0.1~1.0중량%, 습윤제 0.1~1.0중량%, 분산제 0.1~1.0중량%, 소포제 0.1~1.0중량% 및 조막조제 5~20중량%를 첨가하고 혼합 용액이 균일상을 유지할 때까지 기포 발생을 억제하면서 충분히 분산, 교반한다.In the second step, while maintaining the stirring state, 0.1 to 1.0% by weight of the surface smoothing agent, 0.1 to 1.0% by weight of the wetting agent, 0.1 to 1.0% by weight of the dispersant, 0.1 to 1.0% by weight of the antifoaming agent and 5 to 20% by weight of the film forming aid were added. The mixture is sufficiently dispersed and stirred while suppressing bubble generation until the mixed solution maintains a uniform phase.

표면 평활제(levelling agent)는 주용제가 물인 도료의 표면 장력을 낮추어 퍼짐성 및 외관 향상을 위해 사용된다. 표면 평활제가 0.1중량% 미만으로 첨가되는 경우에는 퍼짐성이 떨어져 도막의 두께 차가 발생하게 되고, 1.0중량%를 초과하여 첨가되는 경우에는 표면 장력이 떨어져 도막 두께 조절이 곤란해진다.Surface leveling agent is used to improve the spreadability and appearance by lowering the surface tension of the paint whose main solvent is water. When the surface leveling agent is added at less than 0.1% by weight, the spreadability is poor, and when the surface leveling agent is added at more than 1.0% by weight, the surface tension decreases, making it difficult to control the film thickness.

습윤제(wetting/dispersing agent)는 안료의 분산 상태에 영향을 주어 안료의 색감, 부착 저하 등에 영향을 준다. 본 실시예에서는 변성폴리실록산류가 습윤제로서 사용된다.Wetting / dispersing agents affect the dispersion state of the pigment, affecting the color of the pigment, deterioration of adhesion, and the like. In this embodiment, modified polysiloxanes are used as wetting agents.

분산제(dispersing agent)는 안료의 분산 상태가 양호하도록 도우며, 색감 및 저장 안정성에 영향을 준다. 분산제를 0.1중량% 미만으로 사용하는 경우, 분산성이 떨어져 침강 현상이 발생한다. 본 실시예는 분산제로서 변성폴리우레탄계, 암모늄계를 사용한다.Dispersing agents help to ensure good dispersion of pigments and affect color and storage stability. When the dispersant is used in less than 0.1% by weight, the dispersibility is poor, the sedimentation phenomenon occurs. This embodiment uses a modified polyurethane system and ammonium system as a dispersant.

소포제(antifoaming agent)는 도료 제조시 기포 발생을 억제하여 도장 작업시 표면이 균일해지도록 돕는다. 소포제가 0.1중량% 미만으로 첨가되는 경우에는 소포 효과가 떨어지고, 1.0중량%를 초과하여 첨가되는 경우에는 소위 '피쉬 아이(fish eye) 현상'이 발생 된다. 본 실시예에서는 소포제로서 폴리실록산 공중합체계를 사용한다.Antifoaming agent helps to keep the surface uniform during painting work by suppressing bubble generation during paint production. If the antifoaming agent is added in less than 0.1% by weight, the defoaming effect is inferior, and when added in excess of 1.0% by weight so-called 'fish eye phenomenon' occurs. In this embodiment, a polysiloxane copolymerization system is used as the antifoaming agent.

조막조제는 건조 지연을 돕는다.The film preparation helps to delay drying.

제3-a단계, 메탈릭 도료의 경우, 수성용 알루미늄 페이스트 3~10중량%, 분산제 0.1~1.0중량% 및 조막조제 3~10중량%를 별도 용기에서 웨팅(wetting) 교반한 후, 제2단계의 혼합 용액에 천천히 투입하여 교반한다.Step 3-a, in the case of metallic paint, after wetting and stirring 3 to 10% by weight of aqueous aluminum paste, 0.1 to 1.0% by weight of dispersant and 3 to 10% by weight of film preparation agent in a separate container, and then in the second step The solution was slowly added to the mixed solution and stirred.

제3-b단계, 솔리드 도료의 경우, 수분산 우레탄 수지 또는 우레탄-아크릴 수분산 수지에 5㎛ 이하로 분산된 안료, 분산제 및 이온교환수로 구성된 조색제 5~30중량%를 제2단계의 혼합 용액에 천천히 투입하여 교반한다.In step 3-b, in the case of solid paint, 5-30% by weight of a colorant composed of pigments, dispersants and ion-exchanged water dispersed in a water-dispersed urethane resin or a urethane-acrylic water-dispersed resin of 5 μm or less is mixed in the second step. Slowly add to the solution and stir.

조색제가 5중량% 미만으로 첨가되는 경우에는 은폐력, 색감이 저하되고, 30중량%를 초과하면 소지 부착, 물리적?화학적 특성 저하 및 가격 상승의 문제가 발생한다.When the colorant is added at less than 5% by weight, hiding power and color are lowered, and when the colorant is more than 30% by weight, problems of body adhesion, physical and chemical properties, and price increase are caused.

제4단계, 증점제 0.5~10중량%를 첨가하여 점도를 50~60KU로 맞추고 중화제 0.1~5중량% 첨가하여 pH를 7.5~8.5로 맞춘 후 상온 상태에서 보관한다.In the fourth step, 0.5 to 10% by weight of thickener is added to adjust the viscosity to 50 to 60 KU, 0.1 to 5% by weight of neutralizer is added to adjust the pH to 7.5 to 8.5, and then stored at room temperature.

증점제가 0.5중량% 미만으로 첨가되는 경우에는 증점 효과가 없어 안료의 침강 현상을 억제할 수 없고, 10중량%를 초과하면 점도 증가에 의해 작업성, 도막의 평탄성이 떨어지고, 저장시 점도 경시 변화가 발생하여 동일한 외관 특성을 가질 수 없는 문제가 발생한다. 본 실시예는 증점제로서 아크릴 코폴리머 에멀젼 형, 우레탄 증점제, 셀룰로오즈계 증점제를 사용한다.If the thickener is added at less than 0.5% by weight, there is no thickening effect and the sedimentation phenomenon of the pigment cannot be suppressed, and when it exceeds 10% by weight, the workability and the flatness of the coating film are decreased due to the viscosity increase, and the viscosity changes with time during storage. A problem arises that cannot occur and have the same appearance characteristics. This embodiment uses an acrylic copolymer emulsion type, a urethane thickener, and a cellulose thickener as the thickener.

중화제는 pH 조절을 위해 사용되며, 0.1중량% 미만으로 첨가되는 경우에는 도료의 안정성이 불안정해지고, 5중량%를 초과하면 작은 입자들의 석출, 급격한 점도 변화, 도료의 저장 안정성이 나빠진다. 본 실시예는 중화제로서 암모니아, 트리에틸아민, 디에탄올아민, 2-아미노-2-메틸-1-프로판을 사용한다.The neutralizing agent is used for pH control, and when added at less than 0.1% by weight, the stability of the paint becomes unstable, and when it is more than 5% by weight, precipitation of small particles, rapid viscosity change, and storage stability of the paint are deteriorated. This example uses ammonia, triethylamine, diethanolamine and 2-amino-2-methyl-1-propane as neutralizing agents.

본 실시예에 따른 저온 소부용 하도 메탈릭 도료 조성물은 전술된 제1단계, 제2단계, 제3-a단계 및 제4단계에 의해 제조되며,The low-temperature baking undercoat metallic coating composition according to the present embodiment is prepared by the above-described first, second, third, and third steps,

수분산 우레탄 수지 또는 우레탄-아크릴 수분산 수지 20~60중량%, 이온교환수 5~30중량%, 표면 평활제 0.1~1.0중량%, 습윤제 0.1~1.0중량%, 분산제 0.2~2.0중량%, 소포제 0.1~1.0중량%, 조막조제≪조막조제로 변경≫ 8~30중량%, 수성용 알루미늄 페이스트 3~10중량%, 증점제 0.5~10중량% 및 중화제 0.1~5중량%로 구성된다.20 to 60% by weight of water-dispersed urethane resin or urethane-acrylic water-dispersed resin, 5 to 30% by weight of ion-exchanged water, 0.1 to 1.0% by weight of surface smoothing agent, 0.1 to 1.0% by weight of wetting agent, 0.2 to 2.0% by weight of antifoaming agent 0.1 to 1.0% by weight, film forming aid < > change to film forming aid > 8 to 30% by weight, 3 to 10% by weight aqueous aluminum paste, 0.5 to 10% by weight thickener and 0.1 to 5% by weight neutralizer.

본 실시예에 따른 저온 소부용 하도 솔리드 도료 조성물은 전술된 제1단계, 제2단계, 제3-b단계 및 제4단계에 의해 제조되며,The low-temperature baking primer coating composition according to the present embodiment is prepared by the above-described first, second, third, and third steps, and

수분산 우레탄 수지 또는 우레탄-아크릴 수분산 수지 20~60중량%, 이온교환수 5~30중량%, 표면 평활제 0.1~1.0중량%, 습윤제 0.1~1.0중량%, 분산제 0.1~1.0중량%, 소포제 0.1~1.0중량%, 조막조제 5~20중량%, 5㎛ 이하로 분산된 안료, 분산제 및 이온교환수로 구성된 조색제 5~30중량% 및 증점제 0.5~10중량% 및 중화제 0.1~5중량%로 구성된다.20 to 60% by weight of water-dispersed urethane resin or urethane-acrylic water-dispersed resin, 5 to 30% by weight of ion-exchanged water, 0.1 to 1.0% by weight of surface leveling agent, 0.1 to 1.0% by weight of wetting agent, 0.1 to 1.0% by weight of antifoaming agent 0.1 to 1.0% by weight, 5 to 20% by weight of a film forming aid, 5 to 30% by weight of a colorant consisting of a pigment, a dispersant and ion-exchanged water dispersed at 5 µm or less, 0.5 to 10% by weight of a thickener, and 0.1 to 5% by weight of a neutralizing agent. It is composed.

(저온 소부용 상도 도료 조성물)(Top coat composition for low temperature baking)

이하에서, 본 실시예에 따른 저온 소부용 상도 도료 조성물과 이의 제조 과정을 설명한다.Hereinafter, the low-temperature baking coating composition according to the present embodiment and a manufacturing process thereof will be described.

제1단계, 수분산 우레탄 수지 또는 아크릴 포리올 에멀젼 수지 60~90중량%, 이온교환수 5~15중량%를 혼합하여 교반한다.In the first step, 60 to 90% by weight of the water-dispersible urethane resin or acrylic polyol emulsion resin and 5 to 15% by weight of ion-exchanged water are mixed and stirred.

수분산 우레탄 수지 또는 아크릴 포리올 에멀젼 수지는 경도, 작업성, 내용제성, 내화학성 등이 우수하다. 전술된 수지의 함량이 60중량% 미만으로 함유되는 경우에는 부착성, 표면상태, 외관, 광택, 내마모성, 내알코올성, 내후성, 내산성, 내화장품성, 내열탕성 등의 물성이 저하되고, 90중량%를 초과하는 경우에는 도막 특성이 우수한 대신 점도 상승, 가사시간, 경시 변화 등의 문제가 발생 된다.The water-dispersed urethane resin or acrylic polyol emulsion resin is excellent in hardness, workability, solvent resistance, chemical resistance and the like. When the content of the above-mentioned resin is contained in less than 60% by weight, physical properties such as adhesion, surface condition, appearance, gloss, wear resistance, alcohol resistance, weather resistance, acid resistance, cosmetic resistance, hot water resistance, etc. are lowered, and 90 weight If it exceeds%, problems such as viscosity increase, pot life, and change over time occur while excellent coating properties.

이온교환수가 5중량% 미만으로 함유되는 경우에는 점도가 높아져서 도장 작업성, 외관 불량, 모서리 부분의 기포 발생, 광택과 같은 표면 상태의 저하가 발생되고, 15중량%를 초과하는 경우에는 유동성 조절이 어렵고 표면 장력이 커져 평탄성이 낮아져서 모서리 부분의 면 상태 불량, 신뢰성 등에 문제가 발생한다.When the ion-exchanged water is contained in less than 5% by weight, the viscosity becomes high, resulting in deterioration of surface states such as paintability, poor appearance, bubble formation at edges, and gloss. It is difficult and the surface tension is increased and the flatness is lowered, which causes problems such as poor surface condition and reliability of the edge portion.

제2단계, 조막조제 5~15중량%, 표면평활제 0.1~1.0중량% 및 소포제 0.1~1.0중량%를 추가한 후, 혼합 용액이 균일상을 유지할 때까지 기포발생을 억제하면서 교반한 후, 상온에서 보관한다.After adding the second step, 5-15% by weight of the film forming aid, 0.1-1.0% by weight of the surface smoothing agent and 0.1-1.0% by weight of the antifoaming agent, and stirring while suppressing the bubble generation until the mixed solution maintains a homogeneous phase, Store at room temperature.

조막조제는 건조 지연을 돕는다. 조막조제로는 글리콜(Glycol) 계통이 사용된다.The film preparation helps to delay drying. As a film preparation, a glycol system is used.

표면평활제는 0.1중량% 미만으로 첨가되는 경우에 평활성이 떨어져 광택 저하, 면 상태 불량 등이 발생하고, 1.0중량%를 초과하여 첨가되는 경우에는 표면 장력이 낮아져서 도막 두께 조절, 모서리 부분의 면 상태 불량, 신뢰성 등이 나빠진다.When the surface leveling agent is added at less than 0.1% by weight, the smoothness is lowered, resulting in poor gloss and poor surface condition.When the surface leveling agent is added in excess of 1.0% by weight, the surface tension is lowered to adjust the thickness of the coating film and the surface state of the edge portion. Badness, reliability and so on.

소포제가 0.1중량% 미만으로 첨가되는 경우에는 소포 억제 효과가 떨어지고, 1.0중량%를 초과하여 첨가되는 경우에는 소위 '피쉬 아이(fish eye) 현상'이 발생 된다.When the defoaming agent is added in less than 0.1% by weight, the antifoaming effect is inferior, and when added in excess of 1.0% by weight, so-called 'fish eye phenomenon' occurs.

제3단계, 도장 작업시에, 수성경화제 10~30중량%를 추가하여 혼합 용액을 제조한다.In the third step, painting, 10 to 30% by weight of an aqueous hardener is added to prepare a mixed solution.

경화제가 10중량% 미만으로 첨가되는 경우에는 가사시간이 긴 대신 물이나 조막조제의 증발로 형성된 가교 구조의 도막 특성이 나빠지고, 30중량%를 초과하면 우수한 가교 구조의 도막을 얻을 수 있어 신뢰성이 높아지는 대신 경화 속도가 빨라 작업성이 떨어지고 하도면과의 부착성 등이 저하된다. 본 실시예는 경화제로서 2액형 경화타입의 주제와 혼합하기 위해 무황변 형의 폴리이소시아네이트계, 아민계를 사용한다.When the curing agent is added in less than 10% by weight, the pot life is long, but the coating film properties of the crosslinked structure formed by evaporation of water or film forming agent deteriorate. Instead of increasing, the curing speed is high, resulting in poor workability and deterioration in adhesion to the underlying surface. This embodiment uses a polyisocyanate-based, amine-based non-yellowing type to mix with the two-component curing type of the main agent as the curing agent.

본 실시예에 따른 저온 소부용 상도 도료 조성물은 전술된 제조 방법의 제1단계, 제2단계 및 제3단계에 의해 제조되며, 수분산 우레탄 수지 또는 아크릴 포리올 에멀젼 수지 60~90중량%, 이온교환수 5~15중량%, 조막조제 5~15중량%, 표면평활 제 0.1~1.0중량%, 소포제 0.1~1.0중량% 및 수성경화제 10~30중량%로 구성된다.The low-temperature baking coating composition according to the present embodiment is prepared by the first, second and third steps of the above-described manufacturing method, 60 to 90% by weight of water-dispersed urethane resin or acrylic polyol emulsion resin, ion exchange It consists of 5 to 15% by weight of water, 5 to 15% by weight of film forming agent, 0.1 to 1.0% by weight of surface smoothing agent, 0.1 to 1.0% by weight of antifoaming agent, and 10 to 30% by weight of aqueous curing agent.

본 발명에 따른 저온 소부용 도료 조성물은 기존 도료와 비교하여 도막 물성, 외관성, 물리적?화학적 특성을 유지하면서도, 종래 용제형 도료의 환경규제문제(VOC) 해결, 작업장의 안전, 소지 침식, 제조 비용 절감 등의 효과를 갖는다.The low-temperature baking coating composition according to the present invention solves the environmental control problems (VOC) of conventional solvent-based paints, safety of the workplace, erosion, manufacturing, while maintaining the coating properties, appearance, physical and chemical properties compared to conventional paints It has the effect of cost reduction.

Claims (6)

수분산 우레탄 수지 또는 우레탄-아크릴 수분산 수지 20~60중량%에 이온교환수 5~30중량%를 첨가한 후 교반하는 제1단계;A first step of adding 5-30 wt% of ion-exchanged water to 20-60 wt% of the water-dispersed urethane resin or the urethane-acrylic water-dispersed resin; 교반상태를 유지하면서, 표면평활제 0.1~1.0중량%, 습윤제 0.1~1.0중량%, 분산제 0.1~1.0중량%, 소포제 0.1~1.0중량% 및 조막조제 5~20중량%를 첨가하여 혼합 용액이 균일상을 유지할 때까지 기포 발생을 억제하면서 분산 및 교반하는 제2단계;While maintaining the stirring state, 0.1 to 1.0% by weight of surface smoothing agent, 0.1 to 1.0% by weight of wetting agent, 0.1 to 1.0% by weight of dispersant, 0.1 to 1.0% by weight of antifoaming agent and 5 to 20% by weight of film forming aid were added A second step of dispersing and stirring while suppressing bubble generation until the daily routine is maintained; 수성용 알루미늄 페이스트 3~10중량%, 분산제 0.1~1.0중량% 및 조막조제 3~10중량%를 별도 용기에서 웨팅 교반한 후, 상기 제2단계의 혼합 용액에 투입하여 교반하는 제3-a단계; 및3-a wt% of the aqueous aluminum paste, 0.1-1.0 wt% of the dispersant, and 3-10 wt% of the film forming aid are wet-stirred in a separate container, and then added to the mixed solution of the second step to stir. ; And 증점제 0.5~10중량%를 첨가하여 전체 혼합 용액의 점도를 50~60KU로 맞추고, 중화제 0.1~5.0중량%를 첨가하여 혼합 용액의 pH를 7.5~8.5로 맞춘 후 상온 상태에서 보관하는 제4단계;를 포함하는 저온 소부용 하도 메탈릭 도료 조성물의 제조 방법.Adding a thickener 0.5-10 wt% to adjust the viscosity of the entire mixed solution to 50-60 KU, adding 0.1-5.0 wt% neutralizing agent to adjust the pH of the mixed solution to 7.5-8.5, and then storing the mixture at room temperature; Method for producing a low-temperature baking undercoat metallic coating composition comprising a. 수분산 우레탄 수지 또는 우레탄-아크릴 수분산 수지 20~60중량%, 이온교환수 5~30중량%, 표면 평활제 0.1~1.0중량%, 습윤제 0.1~1.0중량%, 분산제 0.2~2.0중량%, 소포제 0.1~1.0중량%, 조막조제 8~30중량%, 수성용 알루미늄 페이스트 3~10중량%, 증점제 0.5~10중량% 및 중화제 0.1~5중량%를 혼합하여 제조한 저온 소부용 하 도 메탈릭 도료 조성물.20 to 60% by weight of water-dispersed urethane resin or urethane-acrylic water-dispersed resin, 5 to 30% by weight of ion-exchanged water, 0.1 to 1.0% by weight of surface smoothing agent, 0.1 to 1.0% by weight of wetting agent, 0.2 to 2.0% by weight of antifoaming agent Low-temperature baking coating metal coating composition prepared by mixing 0.1 to 1.0% by weight, 8 to 30% by weight of film forming aid, 3 to 10% by weight of aqueous aluminum paste, 0.5 to 10% by weight of thickener, and 0.1 to 5% by weight of neutralizer. . 수분산 우레탄 수지 또는 우레탄-아크릴 수분산 수지 20~60중량%에 이온교환수 5~30중량%를 첨가한 후 교반하는 제1단계;A first step of adding 5-30 wt% of ion-exchanged water to 20-60 wt% of the water-dispersed urethane resin or the urethane-acrylic water-dispersed resin; 교반상태를 유지하면서, 표면평활제 0.1~1.0중량%, 습윤제 0.1~1.0중량%, 분산제 0.1~1.0중량%, 소포제 0.1~1.0중량% 및 조막조제 5~20중량%를 첨가하여 혼합 용액이 균일상을 유지할 때까지 기포 발생을 억제하면서 분산 및 교반하는 제2단계;While maintaining the stirring state, 0.1 to 1.0% by weight of surface smoothing agent, 0.1 to 1.0% by weight of wetting agent, 0.1 to 1.0% by weight of dispersant, 0.1 to 1.0% by weight of antifoaming agent and 5 to 20% by weight of film forming aid were added A second step of dispersing and stirring while suppressing bubble generation until the daily routine is maintained; 수분산 우레탄 수지 또는 우레탄-아크릴 수분산 수지에 5㎛ 이하로 분산된 안료, 분산제 및 이온교환수로 구성된 조색제 5~30중량%를 투입하여 교반하는 제3-b단계; 및Step 3-b, in which 5-30% by weight of a colorant composed of a pigment, a dispersant, and ion-exchanged water dispersed in a water-dispersed urethane resin or a urethane-acrylic water-dispersed resin is 5 μm or less; And 증점제 0.5~5.0중량%를 첨가하여 전체 혼합 용액의 점도를 50~60KU로 맞추고, 중화제 0.5~5.0중량%를 첨가하여 혼합 용액의 pH를 7.5~8.5로 맞춘 후 상온 상태에서 보관하는 제4단계;를 포함하는 저온 소부용 하도 솔리드 도료 조성물의 제조 방법.Adding a thickener 0.5-5.0 wt% to adjust the viscosity of the entire mixed solution to 50-60 KU, adding 0.5-5.0 wt% neutralizing agent to adjust the pH of the mixed solution to 7.5-8.5, and then storing it at room temperature; Method for producing a low-temperature baking coating for solid coating composition comprising a. 수분산 우레탄 수지 또는 우레탄-아크릴 수분산 수지 20~60중량%, 이온교환수 5~30중량%, 표면 평활제 0.1~1.0중량%, 습윤제 0.1~1.0중량%, 분산제 0.1~1.0중량%, 소포제 0.1~1.0중량%, 조막조제 5~20중량%, 5㎛ 이하로 분산된 안료, 분산제 및 이온교환수로 구성된 조색제 5~30중량% 및 증점제 0.5~10중량% 및 중화제 0.1~5 중량%를 혼합하여 제조한 저온 소부용 하도 솔리드 도료 조성물.20 to 60% by weight of water-dispersed urethane resin or urethane-acrylic water-dispersed resin, 5 to 30% by weight of ion-exchanged water, 0.1 to 1.0% by weight of surface leveling agent, 0.1 to 1.0% by weight of wetting agent, 0.1 to 1.0% by weight of antifoaming agent 0.1 to 1.0% by weight, 5 to 20% by weight of a film forming aid, 5 to 30% by weight of a colorant consisting of a pigment, a dispersant and ion-exchanged water dispersed in 5 µm or less, 0.5 to 10% by weight of a thickener, and 0.1 to 5% by weight of a neutralizing agent. A low-temperature baking primer coating composition prepared by mixing. 수분산 우레탄 수지 또는 아크릴 포리올 에멀젼 수지 60~75중량%와 이온교환수 5~15중량%를 혼합하여 교반하는 제1단계;A first step of mixing and stirring 60 to 75% by weight of a water-dispersible urethane resin or acrylic polyol emulsion resin and 5 to 15% by weight of ion-exchanged water; 조막조제 5~15중량%, 표면평활제 0.1~1.0중량% 및 소포제 0.1~1.0중량%를 추가한 후, 혼합 용액이 균일상을 유지할 때까지 기포발생을 억제하면서 교반한 후 상온에서 보관하는 제2단계; 및5-15% by weight of film forming agent, 0.1-1.0% by weight of surface leveling agent and 0.1-1.0% by weight of antifoaming agent, and then stirring while suppressing foaming until the mixed solution maintains a homogeneous phase and then stored at room temperature Step 2; And 도장 작업시에 수성경화제 10~25중량%를 추가하여 혼합 용액을 제조하는 제3단계;를 포함하는 저온 소부용 상도 도료 조성물의 제조 방법.A third step of preparing a mixed solution by adding 10 to 25% by weight of the aqueous curing agent during the painting operation; manufacturing method of a low-temperature baking coating composition comprising a. 수분산 우레탄 수지 또는 아크릴 포리올 에멀젼 수지 60~75중량%, 이온교환수 5~15중량%, 조막조제 5~15중량%, 표면평활제 0.1~1.0중량%, 소포제 0.1~1.0중량% 및 수성경화제 10~25중량%를 혼합하여 제조한 저온 소부용 상도 도료 조성물.60-75 wt% of water-dispersed urethane resin or acrylic polyol emulsion resin, 5-15 wt% of ion-exchanged water, 5-15 wt% of film forming aid, 0.1-1.0 wt% of surface smoothing agent, 0.1-1.0 wt% of antifoaming agent and aqueous hardener A low-temperature baking top coat composition prepared by mixing 10 to 25% by weight.
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