KR20190014264A - Coating Composition for Pre-Coated Metal Color Sheet Having Bio-Clean Function and Color Sheet Using the Same - Google Patents

Coating Composition for Pre-Coated Metal Color Sheet Having Bio-Clean Function and Color Sheet Using the Same Download PDF

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KR20190014264A
KR20190014264A KR1020170097070A KR20170097070A KR20190014264A KR 20190014264 A KR20190014264 A KR 20190014264A KR 1020170097070 A KR1020170097070 A KR 1020170097070A KR 20170097070 A KR20170097070 A KR 20170097070A KR 20190014264 A KR20190014264 A KR 20190014264A
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resin
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acid
contained
pcm
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KR101992531B1 (en
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노진균
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포스코강판 주식회사
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING 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
    • C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/05—Alcohols; Metal alcoholates
    • C08K5/053—Polyhydroxylic alcohols
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/29—Compounds containing one or more carbon-to-nitrogen double bonds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
    • C08K5/41—Compounds containing sulfur bound to oxygen
    • C08K5/42—Sulfonic acids; Derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/56—Organo-metallic compounds, i.e. organic compounds containing a metal-to-carbon bond
    • C08K5/57—Organo-tin compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
    • C08L61/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C08L61/26—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
    • C08L61/28—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds with melamine
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING 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
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/20—Diluents or solvents
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/65—Additives macromolecular

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  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
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Abstract

The present invention relates to a paint composition for pre-coated metal (PCM) having a bio-clean function and a painted steel sheet manufactured by the same. An objective of the present invention is to provide a painted steel sheet suitable for use as a construction material of a bio-complex building by allowing a PCM paint composition to have water resistance and excellent chemical protection such as chemical resistance. To achieve the objective, the paint composition for PCM comprises a resin which is a main component, a cross-linking agent, a curing catalyst, a solvent, and an additive. The resin includes a first resin to improve machinability and a second resin to improve adhesion. The first resin is a polyester resin having a molecular weight of 9,000-12,000, a hydroxyl value of 20-40 mgKOH/g, an acid value of 1-6 mgKOH/g, and a glass transition temperature of 23-25°C, and 15-25 wt% of the same is contained with respect to the entire composition. The second resin comprises 40-60 wt% of an aromatic component in the entire mixture, and has a weight-average molecular weight of 20,000-25,000, a hydroxyl value of 10-30 mgKOH/g, an acid value of 1-3 mgKOH/g, and a glass transition temperature of 65-67°C. 10-20 wt% of the second resin is contained with respect to the entire composition. 1-5 wt% of an epoxy resin having two or more epoxides in a molecule is contained with respect to the entire composition.

Description

바이오 클린 기능을 갖는 피씨엠용 도료 조성물 및 이에 의해 제조된 도장강판{Coating Composition for Pre-Coated Metal Color Sheet Having Bio-Clean Function and Color Sheet Using the Same}[0002] Coating Composition for Pre-Coated Metal Color Sheets Having Bio-Clean Function and Color Sheet Using the Same [

본 발명은 바이오 클린 기능을 갖는 피씨엠용 도료 조성물 및 이에 의해 제조된 도장강판에 관한 것으로서, 더욱 상세하게는, 바이오 단지 건물 등에 사용되는 건자재용 아연도금 강판에 여러 화학물질에 내성을 갖는 도료를 도장함으로써, 내수성, 내약품성 등이 우수한 바이오 클린 기능을 갖는 피씨엠 도장강판을 제조할 수 있는 도료 조성물에 관한 것이다.[0001] The present invention relates to a coating composition for PCM having a bioclean function and a coated steel sheet produced thereby. More particularly, the present invention relates to a zinc-plated steel sheet for building materials used for bio- To a coating composition capable of producing a PCM coated steel sheet having a bioclean function excellent in water resistance, chemical resistance and the like.

강판 도장 방식에는, 강판을 성형 가공한 후에 도장하는 포스트 코팅(Post-Coating) 방식과, 강판을 성형 가공하기 전에 먼저 도장을 하는 프리 코팅(Pre-Coating) 방식이 있다.In the steel plate coating method, there are a post-coating method in which a steel plate is molded and then a pre-coating method in which a steel plate is coated before molding.

상기 포스트 코팅 방식은, 설비비가 저렴하고 소량 생산에 유리하지만, 균일한 제품의 생산 및 대량 생산이 어렵다는 단점이 있다.The post coating method has a disadvantage in that it is difficult to produce a uniform product and to mass-produce, although the equipment cost is low and it is advantageous in producing a small amount.

이에 비하여 프리 코팅 방식은, 균일한 제품을 생산할 수 있고 도료의 손실이 적으며, 단시간 내에 대량 생산이 가능하다는 장점이 있다.On the other hand, the precoating method has advantages that a uniform product can be produced, the loss of the coating material is small, and mass production is possible in a short time.

상기한 프리 코팅 방식으로 도장한 강판을 통상 피씨엠(Pre-Coated Metal) 강판이라 하고, 프리 코팅에 사용되는 도료를 피씨엠 도료라 부르고 있다. The steel sheet coated with the above-described pre-coating method is referred to as a pre-coated steel sheet, and the coating used for precoating is called a PCM coating.

상기한 피씨엠 도료에 의해 도장된 피씨엠 강판은, 도장 후에 별도의 가공 과정을 거치게 된다.The PCM steel sheet painted by the above-mentioned PCM paint is subjected to a separate processing step after coating.

현재 일반적인 피씨엠 도장방식은, 하도와 상도의 2 Coat 시스템이 주로 사용되고 있으며, 이는 도막의 가공성과 외관 등을 고려할 때 최적의 피씨엠 도장 시스템으로 알려져 있다.At present, PC Coating system of Hado and Sangdo is mainly used, and it is known as an optimal PCM coating system considering the processability and appearance of coating film.

상기 피씨엠 도료로는, 도막두께 20 ~ 30㎛의 솔리드(Solid) 색상 도료가 주를 이루고 있다. As the PCM paint, a solid color paint having a thickness of 20 to 30 탆 is mainly used.

그런데 상기한 종래의 피씨엠용 도료는, 강판의 외관, 가공성, 부착성 등을 만족시킬 수는 있지만, 각종 약품에 대한 내화학성이 우수한 이른바 바이오 클린(Bio-Clean) 기능을 충족시키지 못한다는 한계가 있다.However, the above conventional coating material for PCM can not satisfy the so-called Bio-Clean function, which can satisfy the appearance, workability and adhesion of the steel sheet, but has excellent chemical resistance to various chemicals. have.

이에 따라 우수한 내수성, 내약품성 등이 요구되는 바이오 단지 건물에 사용되는 건자재에는 종래의 피씨엠 도료를 적용하기가 부적합하다는 문제점이 있다.Accordingly, there is a problem in that it is not suitable to apply conventional PCM paint to building materials used for buildings in bio-complexes where excellent water resistance and chemical resistance are required.

본 발명은 상기한 종래기술의 문제점을 해결하기 위한 것으로서, 피씨엠 도료 조성물이 내수성, 내약품성 등 우수한 내화학성을 갖도록 하여, 바이오 단지 건물의 건자재용으로 사용하기 적합한 피씨엠 도장강판을 제공하는 데 그 목적이 있다.DISCLOSURE OF THE INVENTION The present invention has been made to solve the problems of the prior art described above, and it is an object of the present invention to provide a PCM coated steel sheet suitable for use as a building material for a biomass building by having a chemical resistance excellent in water resistance and chemical resistance It has its purpose.

본 발명의 다른 목적은, 건자재용에 적합한 물성을 확보함과 동시에, 내화학성을 향상시켜 여러 화학 물질에 내성을 갖는 피씨엠용 도료 조성물을 제공하는 데 있다. It is another object of the present invention to provide a coating composition for PCM that secures physical properties suitable for use in building materials and has improved chemical resistance and resistance to various chemical substances.

본 발명의 또 다른 목적은, 도장강판이 바이오 클린 기능을 가지면서도 외관, 가공성, 부착성 등이 저하되지 않도록 하는 피씨엠용 도료 조성물을 제공하는 데 있다. It is still another object of the present invention to provide a coating composition for a coating film for a coating steel sheet which has a bioclein function but does not deteriorate appearance, workability, adhesion and the like.

상기한 목적을 달성하기 위하여 본 발명은, 주성분인 수지와, 가교제, 경화 촉매, 용제 및 첨가제를 포함하여 이루어지는 피씨엠용 도료 조성물에 있어서, 상기 수지는, 가공성을 향상시키기 위한 제1 수지와, 부착성을 향상시키기 위한 제2 수지로 이루어지고, 상기 제1 수지는, 분자량 9,000 ∼ 12,000, 수산가 20 ∼ 40 mgKOH/g, 산가 1 ∼ 6 mgKOH/g, 유리전이온도 23 ∼ 25℃인 폴리에스테르 수지로서, 전체 조성물에 대하여 15 ∼ 25 중량% 함유되고, 상기 제2 수지는, 전체 배합에서 방향족 성분이 40 ~ 60 중량%이고, 중량평균 분자량 20,000 ∼ 25,000, 수산가 10 ∼ 30 mgKOH/g, 산가 1 ∼ 3 mgKOH/g, 유리전이온도 65 ∼ 67℃로서, 전체 조성물에 대하여 10 ∼ 20 중량% 함유되며, 에폭시 기(Epoxide)를 1분자 중에 2개 이상 가지고 있는 에폭시 수지가, 전체 조성물에 대하여 1.0 ~ 5.0 중량% 함유되는 것을 특징으로 한다.In order to achieve the above object, the present invention provides a coating composition for a PC, which comprises a resin as a main component, a crosslinking agent, a curing catalyst, a solvent and an additive, wherein the resin comprises a first resin for improving workability, Wherein the first resin is a polyester resin having a molecular weight of 9,000 to 12,000, a hydroxyl value of 20 to 40 mg KOH / g, an acid value of 1 to 6 mg KOH / g, and a glass transition temperature of 23 to 25 ° C Wherein the second resin has an aromatic component in an amount of 40 to 60% by weight, a weight average molecular weight of 20,000 to 25,000, a hydroxyl value of 10 to 30 mgKOH / g, an acid value of 1 to 30 mgKOH / g, To 3 mgKOH / g and a glass transition temperature of 65 to 67 占 폚, wherein the epoxy resin is contained in an amount of 10 to 20% by weight based on the total composition, and the epoxy resin having two or more epoxy groups in one molecule is 1.0 ~ 5.0 wt% Characterized in that the oil.

또한 상기 제1 수지의 분자 구조 내에 프로판디올(Propanediol), 1,6 헥산디올(Hexanediol), 1,4 부탄디올(Butanediol) 중 어느 하나의 모노머가, 상기 제1 수지에 대하여 25 ~ 40 중량% 함유되는 것을 특징으로 한다.Also, in the molecular structure of the first resin, at least one monomer selected from the group consisting of propanediol, hexanediol, and 1,4-butanediol is contained in an amount of 25 to 40 wt% .

또한 상기 가교제는, 메톡시기를 갖는 메틸에테르화 멜라민 수지가 3 ∼ 7 중량%, 우레탄 가교제가 1 ∼ 3 중량% 함유되어 있는 것을 특징으로 한다.The crosslinking agent is characterized by containing 3 to 7% by weight of a methyl etherified melamine resin having a methoxy group and 1 to 3% by weight of a urethane crosslinking agent.

또한 상기 경화 촉매는, p-톨루엔 술폰산(p-TSA), 디노닐나프탈렌 술폰산(DNNSA), 디나프탈렌 디술폰산(DNNDSA), 플루오로 술폰산 중에서 선택된 어느 하나를, 2차 아민 또는 에폭시로 중화시켜 얻은 중화 생성물인 것을 특징으로 한다.The curing catalyst may be a catalyst obtained by neutralizing any one selected from p-toluenesulfonic acid (p-TSA), dinonylnaphthalenesulfonic acid (DNNSA), dinaphthalene disulfonic acid (DNNDSA), and fluorosulfonic acid with a secondary amine or epoxy And is a neutralization product.

또한 상기 경화 촉매는, 우레탄 가교 결합을 위해 Tin촉매(DBTDL)를 적용하는 것을 특징으로 한다. The curing catalyst is also characterized in that a Tin catalyst (DBTDL) is applied for urethane crosslinking.

본 발명에 의하면, 내수성, 내약품성 등 우수한 내화학성을 갖는 도료 조성물을 이용하여, 바이오 단지 건물의 건자재용으로 사용하기 적합한 피씨엠 도장강판을 제조할 수 있는 효과가 있다. INDUSTRIAL APPLICABILITY According to the present invention, it is possible to produce a PCM coated steel sheet suitable for use as a building material for a bio-complex using a coating composition having excellent chemical resistance such as water resistance and chemical resistance.

또한 건자재용으로 적합한 물성을 확보함과 동시에 내화학성을 극대화함으로써, 여러 화학 물질에 우수한 내성을 갖는 피씨엠 도장강판을 제조할 수 있는 효과가 있다. In addition, it is possible to manufacture a PCM coated steel sheet having excellent resistance to various chemicals by securing suitable physical properties for construction materials and maximizing chemical resistance.

또한 바이오 클린 기능을 가지면서도, 외관, 가공성, 부착성 등의 물성이 저하되지 않는 피씨엠 도장강판을 제조할 수 있는 효과가 있다.In addition, there is an effect that a coated steel sheet having a bioclean function and which does not deteriorate physical properties such as appearance, workability and adhesion can be produced.

도 1은 본 발명에 따른 피씨엠 도료 조성물에 의해 제조된 도장강판의 단면도.BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a coated steel sheet produced by a PCM paint composition according to the present invention. FIG.

본 발명자는 외관, 가공성, 부착성 등의 물성을 만족시키는 동시에 내수성, 내화학성 등이 우수한 피씨엠 도료 조성물을 개발하기 위해 연구 노력한 결과, 에스테르 결합( - C - CO - O -)을 갖는 2종의 고분자 수지와, 에폭시 기(Epoxide)를 1분자 중에 2개 이상 가지고 있는 에폭시 수지를 콜드 블렌딩(Cold Blending)함으로써, 바이오 클린 기능을 갖는 피씨엠 도료 조성물을 개발하기에 이르렀다.The inventors of the present invention have made efforts to develop a PCM coating composition which satisfies physical properties such as appearance, workability and adhesiveness and is excellent in water resistance and chemical resistance. As a result, it has been found that two kinds of compounds having an ester bond (- C - CO - O--) , And an epoxy resin having two or more epoxy groups in one molecule (Cold Blending) to develop a PCM coating composition having a bio-clean function.

본 발명의 기술적 요지는, 기존의 피씨엠 도료 조성물에 우수한 바이오 클린 기능을 부여할 수 있도록 하였다는 데 있다.The technical point of the present invention is to provide an excellent bioclean function to the conventional PCM coating composition.

즉 2종의 고분자 수지에 의해 건자재용에 적합한 물성을 확보하면서, 별도의 에폭시 수지를 사용하여 피씨엠 도료의 내화학성을 크게 향상시켰다는데 그 특징이 있다. In other words, it has a feature that the chemical resistance of the PCM paint is greatly improved by using a separate epoxy resin while securing proper physical properties for construction materials by using two kinds of polymer resins.

다시 말해서 화학물질에 접촉되는 강판의 표면을 본 발명에 따른 도료 조성물을 코팅함으로써, 여러 화학물질에 견딜 수 있는 기능을 부여한 것이다.In other words, the surface of the steel sheet in contact with the chemical is coated with the coating composition according to the present invention, thereby imparting a function capable of enduring various chemical substances.

본 발명자는, 에스테르 결합( - C - CO - O -)을 갖는 2종의 고분자 수지와, 분자 구조가 (-C-C-) 또는 에테르 결합(-C-O-C)을 갖는 에폭시 수지를 콜드 블렌딩함으로써, 내수성, 내약품성 등을 극대화할 수 있음을 확인하였다.The present inventors have found that by cold-blending two kinds of polymer resins having an ester bond (- C - CO - O -) and an epoxy resin having a molecular structure of (-CC-) or ether bond (-COC) It is possible to maximize the chemical resistance and the like.

본 발명의 도막 구성은, 도 1에 도시된 바와 같이, 외관은 일반 피씨엠 도료와 동일하지만, 2종의 고분자 수지(이하 각각 '제1 수지' 및 '제2 수지'라 한다)와 에폭시 기(Epoxide)를 1분자 중에 2개 이상 가지고 있는 에폭시 수지를 콜드 블렌딩함으로써, 외관, 가공성, 부착성을 유지하면서 내화학성이 우수한 바이오 클린 기능을 갖도록 할 수 있다.As shown in FIG. 1, the coating composition of the present invention has the same outer appearance as a general PCM paint, but comprises two polymer resins (hereinafter referred to as a 'first resin' and a 'second resin') and an epoxy group An epoxy resin having two or more epoxides in one molecule can be cold-blended to have a bioclean function with excellent chemical resistance while maintaining appearance, workability, and adhesion.

이하 본 발명에 따른 피씨엠용 도료 조성물의 각 성분에 대하여 설명한다.Each component of the coating composition for PC according to the present invention will be described below.

<폴리에스테르 수지><Polyester resin>

본 발명에 따른 폴리에스테르 수지는, 가공성이 우수한 제1 수지와 부착성이 우수한 제2 수지로 이루어진다.The polyester resin according to the present invention is composed of a first resin having excellent workability and a second resin having excellent adhesion.

상기 제1 수지는 가공성을 높이기 위해 적용되는 폴리에스테르 수지로서, 중량평균 분자량 9,000 ∼ 12,000, 수산가 20 ∼ 40 mgKOH/g, 산가 1 ∼ 6 mgKOH/g, 유리전이온도 23 ∼ 25℃인 것이 바람직하다.The first resin is preferably a polyester resin which is applied to improve workability and has a weight average molecular weight of 9,000 to 12,000, a hydroxyl value of 20 to 40 mgKOH / g, an acid value of 1 to 6 mgKOH / g, and a glass transition temperature of 23 to 25 ° C .

또한 상기 제1 수지는 전체 조성물에 대하여 15 ∼ 25 중량% 함유시키는 것이 바람직하다.The first resin is preferably contained in an amount of 15 to 25% by weight based on the total composition.

상기 제1 수지의 중량평균 분자량이 12,000를 초과하면 작업성이 떨어지고, 9,000 미만이 되면 도막의 가공성 및 내구성을 유지하기가 어려워진다. If the weight average molecular weight of the first resin exceeds 12,000, the workability decreases. If the weight average molecular weight is less than 9,000, it is difficult to maintain the workability and durability of the coating film.

따라서 제1 수지의 중량평균 분자량은 9,000 ∼ 12,000인 것이 바람직하다.Therefore, the weight average molecular weight of the first resin is preferably 9,000 to 12,000.

또한 도막의 가공성을 유지하기 위해, 상기 분자구조 내에 프로판디올(Propanediol), 1,6 헥산디올(Hexanediol), 1,4 부탄디올(Butanediol) 등의 모노머(Monomer)를 25 ~ 40 중량% 함유시키는 것이 바람직하다.In order to maintain the processability of the coating film, 25 to 40% by weight of monomers such as propanediol, 1,6 hexanediol and 1,4-butanediol are contained in the molecular structure desirable.

상기 모노머의 함량이 30%를 초과하면 표면 경도가 떨어지고, 25% 미만이 되면 도막의 가공성을 확보하기가 어려워진다. When the content of the monomer exceeds 30%, the surface hardness decreases. When the content of the monomer is less than 25%, it becomes difficult to secure the workability of the coating film.

따라서 상기 모노머는, 제1 수지에 대하여 25 ~ 30 중량% 함유시키는 것이 바람직하다. Therefore, it is preferable that the monomer is contained in an amount of 25 to 30% by weight based on the first resin.

또한 전체 도료 조성물에 대한 상기 제1 수지의 함량이 25 중량%를 초과하게 되면, 도료 내에 수지분이 지나치게 많아져 도막의 건조 및 색상 구현에 문제가 발생하게 된다.If the content of the first resin relative to the total coating composition is more than 25% by weight, the amount of the resin component in the coating becomes excessively large, thereby causing a problem of drying and coloring of the coating film.

또한 제1 수지의 함량이 15 중량% 미만이 되면, 도막의 가공성 및 부착성이 매누 저하되어 바람직하지 않다. When the content of the first resin is less than 15% by weight, the workability and adhesion of the coating film deteriorate.

상기 제2 수지는 부착성을 높이기 위해 적용되며, 전체배합에서 방향족 성분을 40 ~ 60%로 하고, 중량평균 분자량 20,000 ∼ 25,000, 수산가 10 ∼ 30 mgKOH/g, 산가 1 ∼ 3 mgKOH/g, 유리전이온도 65 ∼ 67℃인 폴리에스테르 수지인 것이 바람직하다.The second resin is applied in order to improve the adhesion. In the whole composition, the aromatic component is 40 to 60%, the weight average molecular weight is 20,000 to 25,000, the acid value is 10 to 30 mgKOH / g, the acid value is 1 to 3 mgKOH / And a polyester resin having a transition temperature of 65 to 67 占 폚.

또한 상기 제2 수지는, 전체 조성물에 대하여 10 ∼ 20 중량% 함유시키는 것이 바람직하다. The second resin is preferably contained in an amount of 10 to 20% by weight based on the total composition.

상기 제2 수지의 중량평균 분자량이 25,000을 초과하면 작업성이 떨어지고, 20,000 미만이 되면 도막의 부착성을 유지하기가 어렵게 된다. If the weight average molecular weight of the second resin exceeds 25,000, the workability decreases. If the weight average molecular weight is less than 20,000, it is difficult to maintain the adhesion of the coating film.

또한 전체 도료 조성물에 대한 상기 제2 수지의 함량이 20 중량%를 초과하게 되면, 도료 내에 수지분이 지나치게 많아져 도막의 건조 및 색상 구현에 문제가 발생하게 된다.If the content of the second resin relative to the total coating composition exceeds 20% by weight, the amount of the resin component in the coating becomes excessively large, thereby causing a problem in drying and coloring of the coating film.

또한 제2 수지의 함량이 10 중량% 미만이 되면, 도막의 가공성 및 부착성이 저하되어 바람직하지 않다. When the content of the second resin is less than 10% by weight, the workability and adhesion of the coating film are deteriorated.

아래의 <표 1>은 본 발명에 따른 제1 수지의 실시예를 나타낸 것이다. Table 1 below shows an embodiment of the first resin according to the present invention.

본 발명에 따른 제1 수지의 물성The physical properties of the first resin according to the present invention 실시예
항목 Example
Item 1One 22 33 44 비 고Remarks
알코올
(당량비,%)
Alcohol
(Equivalence ratio,%) TMPTMP 5.05.0 5.05.0 3.03.0 3.03.0 NPGNPG 90~9590 ~ 95 43~4843 ~ 48 90~9590 ~ 95 43~4843 ~ 48 MP-DMP-D -- 43~4843 ~ 48 -- 43~4843 ~ 48 PDPD
산
(당량비,%)
mountain
(Equivalence ratio,%) IPAIPA 48~5348 ~ 53 18~2318-23 48~5348 ~ 53 18~2318-23 TPATPA 8~138-13 33~3833 ~ 38 8~138-13 33~3833 ~ 38 TPATPA -- -- 0~0.50 to 0.5 HHPAHHPA -- -- 40~4540 to 45 40~4540 to 45 PAPA 35~4035 to 40 40~4540 to 45 첨가제additive DBTODBTO 0.10.1 0.10.1 0.10.1 0.10.1 희석용제Diluting solvent K150/XYL=
90/10K150 / XYL =
90/10 K150/XYL=90/10K150 / XYL = 90/10 비중importance 1.051.05 1.051.05 1.051.05 1.051.05 점도Viscosity Z~Z2Z ~ Z2 Z1~Z3Z1 ~ Z3 Z~Z2Z ~ Z2 Z1~Z3Z1 ~ Z3 고형분Solids 7070 7070 7070 7070 산가Acid value 6이하6 or less 6이하6 or less 6이하6 or less 6이하6 or less 분자량Molecular Weight 9000 ~ 12,0009000 ~ 12,000 수산기값Hydroxyl value SOLID값SOLID value 35~4035 to 40 20~2520-25 35~4035 to 40 20~2520-25 NPG:네오펜틸글리콜, EG:에틸렌글리콜, 1,6HD:1,6헥산디올, PD:프로판디올
IPA:이소프탈산, TPA:테레프탈산, AA:아디핀산
점도:50%용액(25℃ 가드너)
분자량: 중량평균분자량(GPC)NPG: neopentyl glycol, EG: ethylene glycol, 1,6HD: 1,6 hexanediol, PD: propanediol
IPA: isophthalic acid, TPA: terephthalic acid, AA: adipic acid
Viscosity: 50% solution (25 캜 Gardner)
Molecular weight: weight average molecular weight (GPC)

또한 아래의 <표 2>는 본 발명에 따른 제2 수지의 실시예를 나타낸 것이다.Table 2 below shows an embodiment of the second resin according to the present invention.

본 발명에 따른 제2 수지의 물성The physical properties of the second resin according to the present invention 실시예
항목 Example
Item 1One 22 33 44 비 고Remarks
알코올
(당량비)
Alcohol
(Equivalent ratio) TMPTMP 5.05.0 5.05.0 3.03.0 3.03.0 NPGNPG 43~4843 ~ 48 43~4843 ~ 48 43~4843 ~ 48 43~4843 ~ 48 MP-DMP-D 43~4843 ~ 48 43~4843 ~ 48 PDPD 43~4843 ~ 48 43~4843 ~ 48
산
(당량비)
mountain
(Equivalent ratio) IPAIPA 48~5348 ~ 53 18~2318-23 48~5348 ~ 53 18~2318-23 TPATPA 8~138-13 33~3833 ~ 38 8~138-13 33~3833 ~ 38 TPATPA 15~2015-20 -- 15~2015-20 -- HHPAHHPA -- -- PAPA 15~2015-20 40~4540 to 45 15~2015-20 40~4540 to 45 첨가제additive DBTODBTO 0.10.1 0.10.1 0.10.1 0.10.1 희석용제Diluting solvent K100/PMA=1/1K100 / PMA = 1/1 K100/PMA=50/50K100 / PMA = 50/50 비중importance 1.011.01 1.011.01 1.011.01 1.011.01 점도Viscosity Z~Z2Z ~ Z2 Z1~Z3Z1 ~ Z3 Z~Z2Z ~ Z2 Z1~Z3Z1 ~ Z3 고형분Solids 3737 3737 3737 3737 산가Acid value 3이하3 or less 3이하3 or less 3이하3 or less 3이하3 or less 분자량Molecular Weight 20,000~25,00020,000 ~ 25,000 수산기값Hydroxyl value 25~3025 to 30 10~1510 to 15 15~2015-20 10~1510 to 15 NPG:네오펜틸글리콜, EG:에틸렌글리콜, 1,6HD:1,6헥산디올, TMP:트리메칠올프로판
IPA:이소프탈산, TPA:테레프탈산, AA:아디핀산
점도:40%용액(25℃ 가드너)
분자량: 중량평균분자량(GPC)NPG: neopentyl glycol, EG: ethylene glycol, 1,6HD: 1,6hexanediol, TMP: trimethylolpropane
IPA: isophthalic acid, TPA: terephthalic acid, AA: adipic acid
Viscosity: 40% solution (25 캜 Gardner)
Molecular weight: weight average molecular weight (GPC)

그리고 아래의 <표 3>은 종래의 상도 수지와 본 발명에 따른 제1 수지 및 제2 수지를 비교한 것이다.Table 3 below compares the conventional top resin with the first resin and the second resin according to the present invention.

종래 상도 수지와 본 발명의 제1 수지 및 제2 수지의 비교표 The comparison between the conventional top resin and the first resin and the second resin of the present invention 종래의 상도 수지The conventional top resin 본 발명의 제1수지The first resin of the present invention 본 발명의 제2 수지The second resin of the present invention 고형분(%)Solid content (%) 6565 7070 3737 점도Viscosity Z-Z2Z-Z2 Z-Z3Z-Z3 Z-Z3Z-Z3 분자량Molecular Weight 5,000-7,0005,000-7,000 9,000-12,0009,000-12,000 20,000-25,00020,000-25,000 수산기값Hydroxyl value 35-4035-40 20-2520-25 10-1510-15 TgTg 30-35℃30-35 ℃ 23-25℃23-25 ° C 65-67℃65-67 ℃

위 <표 3>에서 알 수 있듯이, 본 발명에 따른 제1 수지 및 제2 수지는 종래의 상도 수지에 비해 고형분, 분자량, 수산기값, 유리전이온도(Tg)에 있어 큰 차이를 보이고 있다. As can be seen from the above Table 3, the first resin and the second resin according to the present invention show a large difference in solid content, molecular weight, hydroxyl value, and glass transition temperature (Tg) as compared with conventional top resins.

<에폭시 수지>&Lt; Epoxy resin &

본 발명에 따른 피씨엠 도료 조성물은, 바이오 클린 기능을 갖는 별도의 에폭시 수지를 함유하며, 상기 에폭시 수지는, 에폭시 기(Epoxide)를 1분자 중에 2개 이상 가지고 있는 것이 사용된다.The PCM paint composition according to the present invention contains a separate epoxy resin having a bioclean function, and the epoxy resin having two or more epoxy groups (Epoxide) in one molecule is used.

본 발명의 에폭시 수지는, 내수성 및 내약품성이 우수하여 바이오 클린 단지의 건자재 도료에 아주 적합하다. The epoxy resin of the present invention is excellent in water resistance and chemical resistance, and thus is well suited for use as a building material paint for a bioclean complex.

상기 에폭시 수지는, 내화학성은 우수하지만 도막 표면의 붕괴 위험이 있으므로 많은 양의 사용은 피해야 한다.The above-mentioned epoxy resin is excellent in chemical resistance, but there is a risk of collapse of the surface of the coating film, so a large amount of the epoxy resin should be avoided.

이에 따라 상기 에폭시 수지는, 전체 조성물에 대해 1.0 ~ 5.0 중량% 함유시키는 것이 바람직하다.Accordingly, the epoxy resin is preferably contained in an amount of 1.0 to 5.0% by weight based on the total composition.

<가교제> <Cross-linking agent>

본 발명에서는 상기한 수지성분과 도막을 형성하기 위한 가교제로서, 멜라민 수지와 이소시아네이트 수지를 동시에 적용하였다. In the present invention, a melamine resin and an isocyanate resin are simultaneously applied as a crosslinking agent for forming a coating film with the resin component.

상기 가교제는 전체 조성물에 대해 5 ∼ 10 중량% 함유시키는 것이 바람직하다. The crosslinking agent is preferably contained in an amount of 5 to 10% by weight based on the total composition.

기존의 피씨엠 도료에 적용되는 가교제로는, 대부분 멜라민 수지가 사용된다.As the crosslinking agent applied to the conventional PCM paint, melamine resin is mostly used.

그러나 상기 멜라민 수지를 단독으로 사용하게 되면, 도막 강도는 우수하지만 도막의 가공성 및 부착성이 상대적으로 취약해지는 단점이 있다.However, when the melamine resin is used alone, the strength of the coating film is excellent, but the workability and adhesion of the coating film are relatively weak.

또한 가교제로서 이소시아네이트 수지를 단독으로 사용하게 되면, 가공성 및 부착성은 우수하나, 상대적으로 도막 경도가 저하되는 단점이 있다.When the isocyanate resin is used alone as a crosslinking agent, the processability and adhesion are excellent, but the coating film hardness is relatively lowered.

따라서 본 발명에서는 경화 반응속도가 빠르고 경화 반응성이 우수한 메톡시 멜라민 수지를 사용하되, 상기 멜라민 수지와 블록된(Blocked) 이소시아네이트 수지를 1:0.2 ~ 0.4의 비율로 혼합하여 사용하였다.Therefore, in the present invention, a melamine resin and a blocked isocyanate resin are mixed at a ratio of 1: 0.2 to 0.4, using a methoxy melamine resin having a fast curing reaction rate and excellent curing reactivity.

여기서 상기 두 수지의 혼합비가 1:0.4를 초과할 경우에는 도막의 표면 경화가 저하되고, 1:0.2 미만일 경우에는 도막의 가공성 및 부착성이 저하되는 단점이 있다.When the mixing ratio of the two resins is more than 1: 0.4, the surface hardness of the coating decreases. When the mixing ratio is less than 1: 0.2, the workability and adhesion of the coating are deteriorated.

따라서 상기 멜라민 수지와 블록된 이소시아네이트 수지는, 1:0.2 ~ 0.4의 비율로 혼합하여 사용하는 것이 바람직하다.Therefore, the melamine resin and the blocked isocyanate resin are preferably mixed in a ratio of 1: 0.2 to 0.4.

<경화 촉매><Curing Catalyst>

경화 촉매로는, p-톨루엔 술폰산(p-TSA)또는 디노닐나프탈렌 술폰산(DNNSA), 디나프탈렌 디술폰산(DNNDSA), 플루오로 술폰산 중에서 선택된 술폰산을, 아민 또는 에폭시로 중화시킨 것을 사용하는 것이 바람직하다.As the curing catalyst, it is preferable to use a product obtained by neutralizing a sulfonic acid selected from p-toluenesulfonic acid (p-TSA) or dinonylnaphthalenesulfonic acid (DNNSA), dinaphthalene disulfonic acid (DNNDSA) or fluorosulfonic acid with an amine or epoxy Do.

또한 우레탄 가교결합을 위해 Tin촉매(DBTDL)를 사용하는 것이 바람직하다. It is also preferred to use a Tin catalyst (DBTDL) for urethane crosslinking.

상기 경화촉매는 전체 도료 조성물에 대하여 0.5 ∼ 1.5 중량% 범위로 함유시키는 것이 바람직하다. The curing catalyst is preferably contained in an amount of 0.5 to 1.5% by weight based on the total coating composition.

<용제><Solvent>

본 발명의 피씨엠 도료 조성물은, 취급, 피복 작업 시의 특성 등을 고려하여 적당량의 유기 용제를 함유한다. The PCM paint composition of the present invention contains an appropriate amount of an organic solvent in consideration of characteristics during handling and coating.

상기 유기용제로는, 방향족 탄화수소계, 글리콜 에스테르계, 글리콜 에테르계, 알코올계 용제 등을 적절히 혼합하여 사용할 수 있다. As the organic solvent, an aromatic hydrocarbon-based, glycol ester-based, glycol ether-based or alcohol-based solvent may be appropriately mixed and used.

상기 방향족 탄화수소계 용제로는, SK사의 코코졸 #100, 코코졸 #150이 있으며, 글리콜 에스테르계 용제로는, 유니온 카바이드사의 에틸 아세테이트, n-부틸 아세테이트, 셀로솔브 아세테이트, 프로필렌 글리콜 모노메틸 아세테이트, 3-메톡시 부틸 아세테이트 등이 있다.Examples of the aromatic hydrocarbon-based solvent include coco sol # 100 and coco sol # 150 manufactured by SK Corporation. Examples of the glycol ester solvent include ethylacetate, n-butyl acetate, cellosolve acetate, propylene glycol monomethyl acetate, 3-methoxybutyl acetate, and the like.

또한 글리콜 에테르계 용제로는, 유니온 카바이드 사의 메틸 셀로솔브, 에틸 셀로솔브, 에틸렌 글리콜 부틸 에테르, 디에틸렌 글리콜 메틸 에테르, 디에틸렌 글리콜 에틸에테르, 디에틸렌 글리콜부틸 에테르 등이 있으며, 알코올계 용제로는 에탄올, 이소프로판올, n-부탄올, 아밀알콜, 사이클로 헥산올 등이 있다. Examples of glycol ether-based solvents include methyl cellosolve, ethyl cellosolve, ethylene glycol butyl ether, diethylene glycol methyl ether, diethylene glycol ethyl ether, diethylene glycol butyl ether and the like of Union Carbide Co., Ethanol, isopropanol, n-butanol, amyl alcohol, cyclohexanol and the like.

상기한 용제는, 전체 도료 조성물에 대하여 15 ∼ 25 중량% 범위로 함유시키는 것이 바람직하다. The above-mentioned solvent is preferably contained in the range of 15 to 25% by weight based on the total coating composition.

<첨가제(레벨링제, 소포제, 안료)><Additives (leveling agent, antifoaming agent, pigment)>

본 발명에서는 도막 평활성을 유지하고 도장 작업시 소포성 향상을 위하여, 아크릴계나 폴리머계 또는 폴리에틸계 레벨링제와 소포제를 전체 조성물에 대하여 각각 0.5 ∼ 1.0 중량% 함유시킨다. In the present invention, 0.5 to 1.0% by weight of an acrylic, polymeric or polyethyl leveling agent and a defoaming agent are contained in an amount of 0.5 to 1.0% by weight based on the total composition, in order to maintain the smoothness of the coating film and improve the defoaming property in the coating operation.

상기 레벨링제와 소포제로는, 쿠수모토 케미칼사의 디스파론 L-1980, 디스파론 L-1984, 디스파론 AP-30, BYK사의 BYK356, BYK410 등이 있다. Examples of the leveling agent and antifoaming agent include Diparron L-1980, Diparron L-1984, Diparron AP-30, and BYK356 and BYK410 of BYK, which are manufactured by Kusumoto Chemical Co.,

또한 본 발명의 도료 조성물은, 안료를 함유하지 않는 투명 도료 조성물로 사용될 수도 있고, 착색 안료를 함유할 수도 있다.Further, the coating composition of the present invention may be used as a clear coating composition containing no pigment or may contain a coloring pigment.

착색 안료를 첨가할 경우, 피복 조성물 분야에서 사용 가능한 티타늄 옥사이드, 카본 블랙(Carbon Black)등이 사용될 수 있으며, 전체 도료 조성물에 대하여 2 ∼ 5 중량% 범위로 함유시키는 것이 바람직하다. When a color pigment is added, titanium oxide, carbon black and the like which can be used in the coating composition field can be used, and it is preferable that the content is in the range of 2 to 5% by weight based on the total coating composition.

그밖에도 본 발명의 피씨엠 도료 조성물은, 활석, 점토, 실리카, 운모, 알루미나 등과 같은 체질 안료, 충진제를 포함할 수 있다. In addition, the PCM paint composition of the present invention may contain an extender such as talc, clay, silica, mica, alumina and the like, and a filler.

아래의 <표 4>는 도료선정 시험을 실시하기 위한 각 도료의 조성을 나타낸 것이다.Table 4 below shows the composition of each paint to perform the paint selection test.

도료선정 시험을 실시하기 위한 시험시편 도료의 조성Composition of test specimen paint for conducting paint selection test
조성(중량%)
Composition (% by weight)
바이오 클린 도료를 도장한 시험 시편
Test specimen coated with bio-clean paint
1 One 22 33 44 수지Suzy 4040 4040 4040 4040 분산첨가제Dispersant additive 1.01.0 1.01.0 1.01.0 1.01.0 Tio2TiO2 4545 4545 4545 4545 Epoxy 수지Epoxy Resin 1One 33 55 77 실리카Silica 33 33 33 33 멜라민Melamine 44 44 44 44 이소시아네이트Isocyanate 1.21.2 1.21.2 1.21.2 1.21.2 레벨링제Leveling agent 1.51.5 1.51.5 1.51.5 1.51.5 산촉매Acid catalyst 1.21.2 1.21.2 1.21.2 1.21.2 DBEDBE 66 66 66 66 PMAPMA 55 55 55 55 CYCLOHEXANONECYCLOHEXANONE 55 55 55 55 KOCOSOL 100KOCOSOL 100 44 44 44 44 KOCOSOL 150KOCOSOL 150 33 33 33 33

시험 시편은, 0.45T의 GI 강판을 메틸에틸케톤으로 탈지하고, 위 표의 1 ~ 4 의 도료를 건조도막 두께 20㎛가 되도록 바코팅한 뒤, 300℃의 분위기에서 27초간 소부하여 물성 시험 시편을 제조하였다.For the test specimen, 0.45 T GI steel sheet was degreased with methyl ethyl ketone, and the coatings 1 to 4 of the above table were bar coated to a dry film thickness of 20 μm and then baked in an atmosphere of 300 ° C. for 27 seconds. .

아래의 <표 5>는 도료선정 시험 결과로서, 물성 시험결과 중 ◎는 아주 양호, ○는 양호, △는 보통, ×는 불량상태를 나타낸 것이다.Table 5 below shows the result of the paint selection test. In the results of the physical property test,? Is very good,? Is good,? Is normal and X is poor.

구 분
division
바이오 클린 도료를 도장한 시험 시편Test specimen coated with bio-clean paint 1One 22 33 44 비중importance 1.251.25 1.251.25 1.251.25 1.251.25 고형분Solids 58.458.4 58.458.4 58.458.4 58.458.4 점도(sec/25'C)Viscosity (sec / 25'C) 110110 110110 110110 110110 광택Polish 3535 3535 3535 3535 경화도Degree of hardening 5050 5050 2020 1010 연필경도Pencil hardness HH HH HH HH 가공성Processability ◎◎ ◎◎ ◎◎ ◎◎ 부착성Attachment ◎◎ ◎◎ △△ △~×△ - × 약품성Chemical ×× ◎◎ △△ △△ 내식성Corrosion resistance ○○ ◎◎ ○○ △△

도료선정 시험결과, 제2 시험시편이 도막 가공성, 부착성, 약품성, 내식성에서 가장 우수한 결과를 나타내었다.As a result of the paint selection test, the second test specimen showed the best results in coatability, adhesion, chemical resistance and corrosion resistance.

이상에서는 본 발명의 바람직한 실시 예를 예시적으로 설명한 것으로서 본 발명의 범위는 상기한 특정 실시 예에 한정되지 아니한다. 해당 기술분야에서 통상의 지식을 가진 자라면 본 발명의 기술적 사상의 범위를 벗어남이 없이 다양한 변경 및 수정이 가능하다는 것을 이해할 수 있을 것이다. While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the present invention.

10: 소지강판
20: 전처리층
30: 하도 도막층
40: 상도 도막층
50: 배면층10: Substrate steel
20: Pre-treatment layer
30: Lower coating layer
40: top coat layer
50: backside layer

Claims (6)

주성분인 수지와, 가교제, 경화 촉매, 용제 및 첨가제를 포함하여 이루어지는 피씨엠용 도료 조성물에 있어서,
상기 수지는, 가공성을 향상시키기 위한 제1 수지와, 부착성을 향상시키기 위한 제2 수지로 이루어지고,
상기 제1 수지는,
분자량 9,000 ∼ 12,000, 수산가 20 ∼ 40 mgKOH/g, 산가 1 ∼ 6 mgKOH/g, 유리전이온도 23 ∼ 25℃인 폴리에스테르 수지로서, 전체 조성물에 대하여 15 ∼ 25 중량% 함유되고,
상기 제2 수지는,
전체 배합에서 방향족 성분이 40 ~ 60 중량%이고, 중량평균 분자량 20,000 ∼ 25,000, 수산가 10 ∼ 30 mgKOH/g, 산가 1 ∼ 3 mgKOH/g, 유리전이온도 65 ∼ 67℃로서, 전체 조성물에 대하여 10 ∼ 20 중량% 함유되며,
에폭시 기(Epoxide)를 1분자 중에 2개 이상 가지고 있는 에폭시 수지가, 전체 조성물에 대하여 1.0 ~ 5.0 중량% 함유되는 것을 특징으로 하는 바이오 클린 기능을 갖는 피씨엠용 도료 조성물.1. A coating composition for a coating for PC comprising a resin as a main component, a crosslinking agent, a curing catalyst, a solvent and an additive,
The resin is composed of a first resin for improving workability and a second resin for improving adhesion,
Wherein the first resin comprises:
A polyester resin having a molecular weight of 9,000 to 12,000, a hydroxyl value of 20 to 40 mg KOH / g, an acid value of 1 to 6 mg KOH / g and a glass transition temperature of 23 to 25 ° C,
The second resin comprises
The total composition contains 40 to 60% by weight of aromatic components and 20 to 25,000 of weight average molecular weight, 10 to 30 mg KOH / g of acid value, 1 to 3 mg KOH / g of acid value and 65 to 67 캜 of glass transition temperature, To 20% by weight,
An epoxy resin having an epoxy group (Epoxide) in an amount of 1.0 to 5.0% by weight based on the total composition, the epoxy resin having two or more epoxy groups in one molecule. 제 1 항에 있어서,
상기 제1 수지의 분자 구조 내에 프로판디올(Propanediol), 1,6 헥산디올(Hexanediol), 1,4 부탄디올(Butanediol) 중 어느 하나의 모노머가, 상기 제1 수지에 대하여 25 ~ 40 중량% 함유되는 것을 특징으로 하는 바이오 클린 기능을 갖는 피씨엠용 도료 조성물.The method according to claim 1,
Wherein a monomer of any one of propanediol, 1,6 hexanediol and 1,4-butanediol is contained in the molecular structure of the first resin in an amount of 25 to 40% by weight based on the first resin Wherein the biocleaning agent is a bioclean. 제 1 항에 있어서,
상기 가교제는,
메톡시기를 갖는 메틸에테르화 멜라민 수지가 3 ∼ 7 중량%, 우레탄 가교제가 1 ∼ 3 중량% 함유되어 있는 것을 특징으로 하는 바이오 클린 기능을 갖는 피씨엠용 도료 조성물.The method according to claim 1,
The cross-
Wherein the methyl etherified melamine resin having a methoxy group is contained in an amount of 3 to 7% by weight and the urethane crosslinking agent is contained in an amount of 1 to 3% by weight. 제 1 항에 있어서,
상기 경화 촉매는,
p-톨루엔 술폰산(p-TSA), 디노닐나프탈렌 술폰산(DNNSA), 디나프탈렌 디술폰산(DNNDSA), 플루오로 술폰산 중에서 선택된 어느 하나를, 2차 아민 또는 에폭시로 중화시켜 얻은 중화 생성물인 것을 특징으로 하는 바이오 클린 기능을 갖는 피씨엠용 도료 조성물. The method according to claim 1,
The curing catalyst comprises
is a neutralization product obtained by neutralizing any one selected from p-toluenesulfonic acid (p-TSA), dinonylnaphthalenesulfonic acid (DNNSA), dinaphthalene disulfonic acid (DNNDSA), and fluorosulfonic acid with a secondary amine or epoxy And a bioclean function. 제 1 항에 있어서,
상기 경화 촉매는,
우레탄 가교 결합을 위해 Tin촉매(DBTDL)를 적용하는 것을 특징으로 하는 바이오 클린 기능을 갖는 피씨엠용 도료 조성물. The method according to claim 1,
The curing catalyst comprises
And a Tin catalyst (DBTDL) is applied for urethane crosslinking. 제 1 항 내지 제 5 항 중 어느 한 항에 기재된 도료 조성물에 의해 제조되는 것을 특징으로 하는 바이오 클린 기능을 갖는 피씨엠 도장강판.


A coated steel sheet having a bio-clean function, which is produced by the coating composition according to any one of claims 1 to 5.


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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100409151B1 (en) * 2000-12-30 2003-12-06 주식회사 디피아이 High Gloss Polyester Resin
KR20070009048A (en) * 2005-07-15 2007-01-18 유니온스틸 주식회사 Paint composition for greenness pcm
KR20100059232A (en) * 2008-11-26 2010-06-04 아주스틸 주식회사 Under coating material composite for pre-coated metal
JP4608233B2 (en) * 2004-04-02 2011-01-12 株式会社神戸製鋼所 Undercoating composition for production of non-chromate pre-coated metal sheet for forming uneven pattern, and non-chromate pre-coated metal sheet

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100409151B1 (en) * 2000-12-30 2003-12-06 주식회사 디피아이 High Gloss Polyester Resin
JP4608233B2 (en) * 2004-04-02 2011-01-12 株式会社神戸製鋼所 Undercoating composition for production of non-chromate pre-coated metal sheet for forming uneven pattern, and non-chromate pre-coated metal sheet
KR20070009048A (en) * 2005-07-15 2007-01-18 유니온스틸 주식회사 Paint composition for greenness pcm
KR20100059232A (en) * 2008-11-26 2010-06-04 아주스틸 주식회사 Under coating material composite for pre-coated metal

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