KR20060047069A - Low-bake paint composition for painting plastics - Google Patents

Low-bake paint composition for painting plastics Download PDF

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KR20060047069A
KR20060047069A KR1020040092896A KR20040092896A KR20060047069A KR 20060047069 A KR20060047069 A KR 20060047069A KR 1020040092896 A KR1020040092896 A KR 1020040092896A KR 20040092896 A KR20040092896 A KR 20040092896A KR 20060047069 A KR20060047069 A KR 20060047069A
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weight
aqueous
coating
solvent
low
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이진
한상노
김인수
오병수
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(주)피어켐
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L33/04—Homopolymers or copolymers of esters
    • 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
    • C09D133/00—Coating 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
    • C09D133/04—Homopolymers or copolymers of esters
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • 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
    • C09D7/43—Thickening agents
    • 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
    • C09D7/47—Levelling agents
    • 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
    • C09D7/61—Additives non-macromolecular inorganic
    • 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
    • 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
    • C09D7/80—Processes for incorporating ingredients
    • 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
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/08—Metals
    • C08K2003/0812—Aluminium

Abstract

본 발명은 플라스틱 일회 도장용 저온소부형 도료 조성물에 관한 것으로서, 보다 상세하게는 경도, 내스크래치성, 내후성 및 내용제성이 우수한 수성 스타이렌-아크릴계 수지 및 수성 자기가교형 아크릴 코폴리머를 혼합하여 사용함으로써, 저온소부를 통해 단시간 내에 건조가 가능하고 점착성이 제거되어 취급이 용이하며 상도도장 없이 일회 도장만으로도 요구되는 외관, 내마모성, 내습성 및 내알코올성 등의 도막물성이 우수한 저온소부형 수성 도료 조성물에 관한 것이다.The present invention relates to a low-temperature baking composition for plastic one-time coating, and more specifically, to a mixture of an aqueous styrene-acrylic resin and an aqueous self-crosslinking acrylic copolymer having excellent hardness, scratch resistance, weather resistance, and solvent resistance. Thus, it is possible to dry in a short time through the low temperature baking, adhesiveness is removed, easy to handle, and the coating material properties such as appearance, abrasion resistance, moisture resistance, and alcohol resistance required by a single coating without top coat are excellent in low temperature type water-based coating composition. It is about.

수성 도료 * 환경친화형 도료 * 일회 도장용 도료 * 플라스틱 도장용 도료Water-based paints * Environment-friendly paints * One-time paints * Plastic paints

Description

플라스틱 도장용 저온소부형 도료 조성물{Low-bake paint composition for painting plastics}Low-bake paint composition for painting plastics

본 발명은 플라스틱 일회 도장용 저온소부형 도료 조성물에 관한 것으로서, 보다 상세하게는 경도, 내스크래치성, 내후성 및 내용제성이 우수한 수성 스타이렌-아크릴계 수지 및 수성 자기가교형 아크릴 코폴리머를 혼합하여 사용함으로써, 저온소부를 통해 단시간 내에 건조가 가능하고 점착성이 제거되어 취급이 용이하며 상도도장 없이 일회 도장만으로도 요구되는 외관, 내마모성, 내습성 및 내알코올성 등의 도막물성이 우수한 저온소부형 수성 도료 조성물에 관한 것이다.The present invention relates to a low-temperature baking composition for plastic one-time coating, and more specifically, to a mixture of an aqueous styrene-acrylic resin and an aqueous self-crosslinking acrylic copolymer having excellent hardness, scratch resistance, weather resistance, and solvent resistance. Thus, it is possible to dry in a short time through the low temperature baking, adhesiveness is removed, easy to handle, and the coating material properties such as appearance, abrasion resistance, moisture resistance, and alcohol resistance required by a single coating without top coat are excellent in low temperature type water-based coating composition. It is about.

플라스틱 성형물의 용도가 화장품 뚜껑, 전화기, 자동차, 전자장비 등의 분야에서 그 사용량이 점차 증가되고 있다. 그러나, 이들 플라스틱 성형품들은 유리나 금속에 비해 내스크래치성이나 경도가 떨어져 상품가치에 막대한 손실을 가져오게 된다. 이러한 플라스틱 성형품의 표면손상 보호 및 경도, 광택 향상을 위하여 여러 가지 도장기법이 개발되고 있다. 가장 범용적으로 사용되어지는 도장기법들로는 자연건조방법, 40∼80℃의 저온소부 방법 및 자외선 경화 방법 등을 들 수 있다.The use of plastic moldings is gradually increasing in the fields of cosmetic lids, telephones, automobiles and electronic equipment. However, these plastic molded parts have a lower scratch resistance and hardness than glass or metal, resulting in a great loss in commodity value. Various coating techniques have been developed for surface damage protection, hardness, and gloss improvement of plastic molded products. The most widely used coating techniques include a natural drying method, a low temperature baking method of 40 ~ 80 ℃ and ultraviolet curing method.

또한 플라스틱 소재의 특성상(소재별 유리전이온도 차이, 유기용제에 의한 용해력 차이 등) 각각의 소재에 적용되는 도료 타입이 달라진다. 그러나, 플라스틱 소재별로 적합한 하도(下塗)와 상도(上塗)의 타입이 제한적이어서, 생산성 및 도장 작업성 향상에 막대한 지장을 주고 있는 실정이다. 일회 도장용 도료는 도료를 거듭 칠해서 상도도장 없이 도장 마무리를 하는 도료로서, 도장계에 의한 바탕의 악영향을 방지하고 부착성을 증가시키기 위해서 사용하며 주로 비닐이나 아크릴 수지 등에 안료를 섞어 락카 형태로 쓰인다. 이와 같은 일회 도장용 도료는 물성이 약하기 때문에 수지에 대한 특별한 설계가 필요하다.In addition, the type of paint applied to each material varies depending on the characteristics of the plastic material (difference in glass transition temperature for each material, difference in solvent power due to organic solvent, etc.). However, since the type of the lower coat and the upper coat suitable for each plastic material is limited, it is a situation that greatly affects the productivity and the paintability. A one-time paint is a paint that finishes the coating without top coating by repeatedly painting the paint. It is used to prevent the adverse effects of the background caused by the paint system and to increase adhesion. It is mainly used in the form of lacquer by mixing pigments in vinyl or acrylic resin. . Since such a one-time coating material is weak in physical properties, a special design for the resin is required.

종래에는 아크릴 주수지와 상용성이 좋은 에스테르 올리고머를 주로 사용하여 왔으며, 일반적으로 우레탄은 아크릴과의 좋지 않은 상용성으로 인하여 사용을 회피하였다. 수분산 수지 제조시, 일반적으로 수지 주쇄에 친수성 사슬을 도입하지 않으면 안정한 수분산물을 형성하지 못한다. 그래서 아크릴수지 단독의 수분산물 제조시에는 어느 정도 물에 녹는 성질을 가진 모노머의 적절한 조합이 요구되거나 중화 작용기로 많은 양의 카르복시기를 도입하거나 하이드록시기를 가진 모노머를 도입하여 물과의 상용성을 좋게 한다. 그러나 이러한 방법은 고점도의 수지를 만들게 되어 많은 양의 용제가 필요하게 되는 단점이 있다. 또한 많은 양의 카르복시기로 인해 도막의 내수성이 좋지 않은 결과를 초래한다. 그리고 친수성 아크릴 모노머의 도입시도 내수성 및 기타물성을 만족시키지 못한다. Conventionally, ester oligomers having good compatibility with acrylic resins have been mainly used, and urethanes have generally been avoided due to poor compatibility with acrylics. In the preparation of water-dispersible resins, it is generally not possible to form stable water products unless a hydrophilic chain is introduced into the resin backbone. Therefore, in the production of water-based acrylic resin alone, proper combination of monomers having some water-soluble property is required, or a large amount of carboxyl group is introduced as a neutralizing functional group or a monomer having a hydroxy group is introduced to improve compatibility with water. do. However, this method has a disadvantage in that a large amount of solvent is required to make a high viscosity resin. In addition, a large amount of carboxyl groups results in poor water resistance of the coating film. In addition, the introduction of the hydrophilic acrylic monomer does not satisfy the water resistance and other physical properties.

또한 에스테르 올리고머형 수지는 물성면에서 내수 및 내산성 등에서 좋지 않은 결과를 초래하였다.In addition, the ester oligomeric resin has a poor result in water and acid resistance in terms of physical properties.

최근 들어서 제시되고 있는 저온 경화 기술들을 보면 폴리에스테르수지의 관능기 및 반응성을 증가시키는 방법과, 잠재성 경화제를 이용하는 방법 및 저온에서 우수한 반응성기를 갖는 에폭시경화제를 사용하는 방법 등이 제시되어 있는데, 이 경우에도 레벨링 저하의 문제점과 70∼80 ㎛의 도막두께에서 핀홀의 발생이 심하고, 저온 경화도료에서만 특징적으로 나타나는 장기간 저장시 화학적 경시변화의 발생으로 인하여 초기 대비 기계적 물성이 저하되는 문제점 등이 발생하여 일부 도료는 현재 용도에 따라서 제한적으로 사용되고 있는 실정이다.Recently, low temperature curing techniques have been proposed to increase the functional group and reactivity of polyester resins, to use latent curing agents, and to use epoxy curing agents having excellent reactive groups at low temperatures. The problem of lowering of leveling and pinholes in the film thickness of 70-80 ㎛ is severe, and the mechanical properties decrease in comparison with the initial ones due to the change of chemical aging during long-term storage, which is characteristic only in low-temperature curing paints. Paint is currently used in a limited manner depending on the application.

선진국에서는 VOC 규제법률에 따라 각종 산업분야에서 수용성 도료, 분체 도료, UV 도료 등의 환경친화형 도료 적용이 의무화 되어가고 있으며, 국내에서도 도료 제조시설 및 도장설비에 대한 규제가 본격화될 예정이며 최근에는 자동차, 금속부품 및 플라스틱류의 도장시 수용성 도료가 일부 적용되기 시작하고 있다.In developed countries, the application of environmentally friendly paints such as water-soluble paints, powder paints, and UV paints is mandatory in various industrial fields under the VOC regulations.In Korea, regulations on paint manufacturing facilities and painting facilities are expected to be in full swing. When painting automotive, metal parts and plastics, some water-soluble paints are beginning to be applied.

그러나 과거 및 현재까지의 도료용 수용성 수지를 도료에 적용할 때 내수성, 충격성, 부착성, 연마성 및 건조성 등에서 기존 유용성 도료에 비해 현저히 열등할 뿐만 아니라 도장 작업성 및 외관에서도 유성도료의 목표 물성에 부합할 수 없었다.However, when applying water-soluble resins for paints to paints, they are not only inferior to existing useful paints in water resistance, impact, adhesion, abrasiveness and dryness, but also target properties of oil paints in painting workability and appearance. Could not meet.

이에 본 발명자들은 상기한 문제점들을 해결하기 위하여 연구한 결과, 수성 스타이렌-아크릴 수지 및 수성 자기가교형 아크릴 코폴리머를 혼합하여 저온소부형 도료 조성물을 제조함으로써 다양한 플라스틱 소재에 대한 부착성이 우수하고 상도도장 없이도 우수한 도막물성을 가지는 도료 조성물을 제조할 수 있음을 발견하고 본 발명을 완성하였다. 따라서, 본 발명의 목적은 수성 스타이렌-아크릴 수지 및 수성 자기가교형 아크릴 코폴리머를 함유하는 플라스틱 도장용 저온소부형 도료 조성물을 제공하는 것이다.Accordingly, the present inventors have studied to solve the above problems, and as a result, by mixing an aqueous styrene-acrylic resin and an aqueous self-crosslinking acrylic copolymer to prepare a low-temperature small coating composition, it is excellent in adhesion to various plastic materials. The present invention was completed by discovering that a coating composition having excellent coating properties can be prepared without top coat. Accordingly, it is an object of the present invention to provide a low temperature baking composition for plastic coating containing an aqueous styrene-acrylic resin and an aqueous self-crosslinking acrylic copolymer.

상기한 목적을 달성하기 위하여, 본 발명에 의한 저온소부형 도료 조성물은 수성 스타이렌-아크릴 수지 및 수성 자기가교형 아크릴 코폴리머를 함유하며, 상기 수성 자기가교형 아크릴 코폴리머가 고형분 함량을 기준으로 전체 도료 조성물의 5∼25 중량%, 첨가제가 2∼10 중량% 및 조용제가 3∼20 중량%로 함유되는 것을 특징으로 하며, 이 범위 안에서 도료 조성물의 가장 바람직한 물성을 얻을 수 있다.In order to achieve the above object, the low temperature baking composition according to the present invention contains an aqueous styrene-acrylic resin and an aqueous self-crosslinking acrylic copolymer, wherein the aqueous self-crosslinking acrylic copolymer is based on a solid content. It is characterized by containing 5 to 25% by weight of the total coating composition, 2 to 10% by weight of additives and 3 to 20% by weight of co-solvent, the most desirable physical properties of the coating composition can be obtained within this range.

이하 본 발명을 보다 상세히 설명한다.Hereinafter, the present invention will be described in more detail.

본 발명에서 사용하는 수성 스타이렌-아크릴 수지의 함량은 15∼50 중량%가 바람직하다. 상기 수성 스타이렌-아크릴 수지의 함량이 15 중량% 미만일 경우 내알코올성과 부착성이 저하되고 50 중량부를 초과할 경우 내산성이 저하될 수 있다.The content of the aqueous styrene-acrylic resin used in the present invention is preferably 15 to 50% by weight. When the content of the aqueous styrene-acrylic resin is less than 15% by weight, alcohol resistance and adhesion may be lowered, and when it exceeds 50 parts by weight, acid resistance may be lowered.

본 발명에서 사용하는 수성 자기가교형 아크릴 코폴리머는 경도와 내화학성이 우수한 것이 특징이며, 그 함량은 10∼40 중량%가 바람직하다. 상기 수성 자기가교형 아크릴 코폴리머의 함량이 10 중량% 미만일 경우 스크래치(Scratch)성과 내화학성이 저하되며, 40 중량%를 초과할 경우 저장 안정성에 영향을 준다.The aqueous self-crosslinking acrylic copolymer used in the present invention is characterized by excellent hardness and chemical resistance, and its content is preferably 10 to 40% by weight. When the content of the aqueous self-crosslinked acrylic copolymer is less than 10% by weight, scratch resistance and chemical resistance are lowered, and when it exceeds 40% by weight, the storage stability is affected.

본 발명에 따른 도료 조성물을 구성하는 용제는 도료 제조시 수지를 용해시켜 주며, 안료의 분산을 양호하게 해주고, 점도조절, 저장성 및 최저 도막의 형성온도 등을 부여한다. 또한, 기대하는 표면상태를 만들어 주고, 도장시 도장기기에 적합한 성질을 부여하며, 용제의 휘발에 기여한다. The solvent constituting the coating composition according to the present invention dissolves the resin in preparing the coating, improves the dispersion of the pigment, and imparts viscosity control, shelf life and formation temperature of the minimum coating film. In addition, it creates the expected surface condition, imparts suitable properties to the coating equipment during painting, and contributes to the volatilization of the solvent.

보다 구체적으로는 주용제로는 탈이온수를 사용하고, 그 함량은 5∼30 중량%가 적당하며, 조용제로는 당업계에 알려진 통상적인 친수성 유기용제를 사용하며, 바람직하게는 부틸렌글리콜을 사용하는 것이 좋다. 상기 조용제로 사용하는 친수성 유기용제의 함량은 5∼30 중량%가 적당하다. 상기 친수성 유기용제가 5 중량% 미만이 되면 도료의 수지에 대한 부착성이 나빠져 부착이 불안정해지고, 도료의 기포가 많이 발생하여 도막에 크레타링이 생기며, 도막의 치밀도가 떨어져 물성 저하가 생기고, 30 중량%를 초과하면 레올로지(Rheology) 조절이 어려워 도장 작업성이 저하되며 저장성 문제가 생길 수 있다.More specifically, deionized water is used as the main solvent, the content thereof is 5 to 30% by weight, and a conventional hydrophilic organic solvent known in the art is used, and preferably butylene glycol is used. It is good. The content of the hydrophilic organic solvent used as the co-solvent is 5 to 30% by weight is appropriate. When the hydrophilic organic solvent is less than 5% by weight, adhesion of the paint to the resin is poor, adhesion is unstable, bubbles of paint are generated a lot, cretaling occurs in the coating film, and the density of the coating film is lowered, resulting in deterioration of physical properties. If it exceeds 30% by weight, rheology is difficult to control, resulting in poor paintability and storage problems.

본 발명에서 사용하는 소포제는 도료 제조시 또는 도장시 기포를 제거하여 저장성이나 작업성에 영향을 주는 것으로서, 실리콘계 계면활성제를 사용하는 것이 바람직하며, 그 함량은 0.1∼1.0 중량%가 적당하다.The antifoaming agent used in the present invention removes bubbles during paint production or painting, and affects storage properties and workability, and it is preferable to use a silicone-based surfactant, and its content is suitably in the range of 0.1 to 1.0% by weight.

상기 소포제의 함량이 0.1 중량% 미만이면 소포효과가 없어 안료분산 및 도료 제조시 많은 기포가 발생하여 쉽게 꺼지지 않는 문제가 있으며, 1.0 중량%를 초과하면 소포력은 향상되나 도료 가격 상승의 요인이 됨은 물론 도막의 부착성을 저해하는 문제가 있다.If the content of the antifoaming agent is less than 0.1% by weight, there is no problem of antifoaming effect, so that many bubbles are generated during pigment dispersion and paint production, and it does not turn off easily. Of course, there is a problem of inhibiting the adhesion of the coating film.

본 발명에서 사용하는 표면 평활제는 도료의 표면장력을 저하시켜 도장 작업시 퍼짐성 및 외관향상을 위하여 사용하는 것으로서, 당업계에서 통상적으로 알려진 것을 사용하며, 바람직하게는 실리콘계를 사용하는 것이 좋다. 상기 표면 평활제의 함량은 0.2∼2.0 중량%가 적당하다.The surface leveling agent used in the present invention is used to improve the spreadability and appearance during painting work by lowering the surface tension of the paint, it is generally used in the art, it is preferable to use a silicone-based. The content of the surface leveling agent is suitably 0.2 to 2.0% by weight.

상기 평활제의 함량이 0.2 중량% 미만이면 도료의 웨팅(wetting) 효과가 떨어져 도장시 도료가 소재에 잘 부착하지 않는 문제가 있으며, 2.0 중량%를 초과하면 도료가격 상승요인은 물론 도료의 표면장력의 급격한 저하로 도장시 소재 표면에 새깅(Sagging) 현상을 유발할 수 있으며, 도막의 부착성을 저해하는 문제가 있다.If the content of the leveling agent is less than 0.2% by weight, there is a problem that the paint does not adhere well to the material due to the wetting effect of the paint, and when it exceeds 2.0% by weight, the surface tension of the paint as well as the increase in the paint price The sudden drop of may cause a sagging (Sagging) phenomenon on the surface of the material during painting, there is a problem that inhibits the adhesion of the coating film.

또한 본 발명에서는 수성도료용 알루미늄 페이스트 또는 유/무기 안료를 사용한다. 메탈릭 도료로 제형화하는 경우에는 수용성 안료로서 알루미늄 페이스트 3∼10 중량%를 상기 조용제 3∼10 중량%와 혼합하여 사용하며, 솔리드 도료로 제형화하는 경우에는 유/무기 안료를 분산제 및 탈이온수와 혼합하여 제조한 농축액 5∼30 중량%를 사용한다. 이때, 상기 농축액은 안료 10∼40 중량%, 분산제 3∼35 중량% 및 탈이온수 25∼87 중량%로 이루어진다.In addition, the present invention uses an aluminum paste or an organic / inorganic pigment for water-based paint. When formulated with metallic paint, 3-10 wt% of aluminum paste is mixed with 3-10 wt% of the above-mentioned coarse solvent as a water-soluble pigment, and when formulated with solid paint, organic / inorganic pigment is mixed with dispersant and deionized water. 5-30% by weight of the concentrate prepared by mixing is used. At this time, the concentrate is composed of 10 to 40% by weight of the pigment, 3 to 35% by weight of the dispersant and 25 to 87% by weight of deionized water.

본 발명에서 사용하는 유/무기 안료는 당업계에서 통상적으로 사용되는 것으로서 당업자가 용이하게 선택하여 사용할 수 있으며, 예를 들면 티타늄다이옥사이드, 카본블랙, 아이론 옥사이드 등의 무기 안료; 및 프탈로시아닌블루, 프탈로시아닌그린, 페릴렌레드 등의 유기 안료 등을 사용할 수 있으나, 이에 한정되는 것은 아니다.Organic / inorganic pigments used in the present invention are commonly used in the art and can be easily selected and used by those skilled in the art, for example, inorganic pigments such as titanium dioxide, carbon black, and iron oxide; And organic pigments such as phthalocyanine blue, phthalocyanine green, and perylene red, and the like, but are not limited thereto.

상기 안료의 함량이 10 중량% 미만이면 은폐력 저하 및 도막경도, 건조성 저하 등을 초래하게 되고, 40 중량%를 초과하면 도막 간의 층간 부착성 및 기계적 물성이 떨어질 뿐만 아니라 가격 상승의 원인이 된다. When the content of the pigment is less than 10% by weight, the hiding power, the coating film hardness, the drying property, and the like may be lowered. If the content is more than 40% by weight, the interlayer adhesion and mechanical properties between the coatings may be lowered and the price may be increased.

본 발명에서 상기 유/무기 안료를 분산하는데 사용하는 분산제는 통상적으로 당업계에 알려진 것을 사용하며, 그 함량은 상기 농축액 총 중량에 대하여 3∼35 중량%가 적당하다. 상기 분산제의 함량이 3 중량% 미만이면 분산시 원하는 입도(5㎛ 이하)로 안료를 분산시키기 어려운 문제가 있으며, 35 중량%를 초과하면 분산성은 좋아질 수 있으나 도막의 부착성을 저해하는 문제가 있다.In the present invention, a dispersant used to disperse the organic / inorganic pigment is generally used in the art, and its content is suitably 3 to 35% by weight based on the total weight of the concentrate. When the content of the dispersant is less than 3% by weight, it is difficult to disperse the pigment at a desired particle size (5 μm or less) during dispersion, and when the content of the dispersant exceeds 35% by weight, the dispersibility may be improved, but there is a problem that inhibits adhesion of the coating film. .

본 발명에서 최종 도료의 저장안정성과 pH 조절을 위하여 사용되는 중화제는 조성물 총 중량에 대하여 0.1∼5 중량%로 사용하는 것이 바람직하며, 도료 조성물의 pH가 7.5-8.5가 되도록 한다. 본 발명에서 사용하는 중화제의 예로는 암모니아, 트리에틸아민, 디에탄올아민, N,N-디메틸에탄올아민, 2-아미노-2-메틸-1-프로판올, N,N-디에틸에탄올아민, 2-디메틸아미노-2-메틸-1-프로판올, 모노이소프로판올, 트리이소프로판올아민, 트리부틸아민, 모노에탄올아민, 트리에탄올아민, N-메틸디에탄올아민, N-메틸디에탄올아민 및 몰포린으로 이루어진 군으로부터 선택하여 사용할 수 있으나, 이에 한정되는 것은 아니다. 상기 중화제의 함량이 0.1 중량% 미만이면 최종적으로 도료를 제조한 후 도료의 열저장 안정성이 불안정해지며, 5 중량%를 초과하면 상대적으로 많아진 아민이 조성물과 반응을 일으켜 작은 입자들을 석출하는 문제가 있다.In the present invention, the neutralizing agent used for storage stability and pH control of the final paint is preferably used at 0.1 to 5% by weight based on the total weight of the composition, so that the pH of the coating composition is 7.5-8.5. Examples of neutralizing agents used in the present invention include ammonia, triethylamine, diethanolamine, N, N-dimethylethanolamine, 2-amino-2-methyl-1-propanol, N, N-diethylethanolamine, 2- Selected from the group consisting of dimethylamino-2-methyl-1-propanol, monoisopropanol, triisopropanolamine, tributylamine, monoethanolamine, triethanolamine, N-methyldiethanolamine, N-methyldiethanolamine and morpholine However, the present invention is not limited thereto. If the content of the neutralizing agent is less than 0.1% by weight, the thermal storage stability of the coating becomes unstable after the final production of the paint, and when the content of the neutralizing agent exceeds 5% by weight, the amine reacts with the composition to precipitate small particles. have.

본 발명에서 사용하는 증점제는 아크릴 코폴리머 에멀젼 타입을 사용하는 것이 바람직하며, 그 함량은 0.5∼10 중량%가 적당하다. 상기 증점제의 함량이 0.5 중량% 미만이면 도료의 증점 효과 및 슈도우 플라스틱(Pseudoplastic) 성향이 없어 도장시 새깅(Sagging) 현상을 제어하기 어려운 문제가 있으며, 10 중량%를 초과하면 도료의 급격한 점도 증가로 도장시 도료의 무화가 어려워지며 도막의 평활성을 저해하는 문제가 있다.The thickener used in the present invention is preferably an acrylic copolymer emulsion type, the content of which is preferably from 0.5 to 10% by weight. If the content of the thickener is less than 0.5% by weight, there is a problem in that it is difficult to control the sagging phenomenon during painting because there is no thickening effect of the paint and the tendency of pseudoplastic, and when it exceeds 10% by weight, the viscosity of the paint increases rapidly. As it becomes difficult to atomize the paint during painting, there is a problem of inhibiting the smoothness of the coating film.

본 발명에 의한 저온소부형 도료 조성물을 제조하는 과정을 살펴보면 다음과 같다. Looking at the process for producing a low-temperature small-type coating composition according to the present invention.

수성 스타이렌-아크릴 수지 15∼50 중량% 및 수성 자기가교형 아크릴 코폴리머 10∼40 중량%를 혼합용기에 투입한 후, 탈이온수 5∼30 중량%를 가하여 교반하면서 첨가제로서 소포제 0.1∼1.0 중량% 및 표면 평활제 0.2∼2.0 중량%를 투입하고, 계속해서 조용제 5∼30 중량%를 가하여 혼합 용액이 균일해질 때까지 충분히 분산시킨다.15-50% by weight of the aqueous styrene-acrylic resin and 10-40% by weight of the aqueous self-crosslinking acrylic copolymer were added to the mixing vessel, and then 5 to 30% by weight of deionized water was added thereto, and 0.1 to 1.0 weight of the antifoaming agent as an additive. % And 0.2 to 2.0% by weight of a surface leveling agent are added, and then 5 to 30% by weight of a coarse solvent is added to disperse until the mixed solution becomes uniform.

그런 다음 메탈릭 도료인 경우는 수성도료용 알루미늄 페이스트 3∼10 중량% 및 조용제 3∼10 중량%를 별도 용기에 평량하여 충분히 섞은 다음 상기 혼합 용액에 천천히 투입한 후 계속적으로 교반하고, 솔리드 도료의 경우는 안료가 5㎛ 이하로 분산되어 있는 안료, 분산제 및 탈이온수로 구성된 농축액 5∼30 중량%를 상기 혼합 용액에 투입하여 교반한다.Then, in the case of a metallic paint, 3-10 wt% of an aqueous paint aluminum paste and 3-10 wt% of a coarse solvent are weighed in a separate container, thoroughly mixed, slowly added to the mixed solution, followed by continuous stirring. 5-30% by weight of a concentrated solution composed of a pigment, a dispersant and deionized water in which the pigment is dispersed at 5 μm or less is added to the mixed solution and stirred.

상기 용액에 다시 첨가제로서 증점제 0.5∼10 중량% 및 중화제 0.1∼5 중량%를 가하여 pH를 7.5-8.5로 조절하고 점도를 20∼35 초(Din Cup #4)로 조절하여 마감한다.0.5-10 wt% of a thickener and 0.1-5 wt% of a neutralizer were added to the solution again to adjust the pH to 7.5-8.5 and the viscosity was adjusted to 20-35 seconds (Din Cup # 4).

본 발명에 의한 저온소부형 도료 조성물은 기존 용제형 도료의 작업성과 도막물성을 유지하면서 VOC를 획기적으로 감소시킨 환경친화적 플라스틱 도장용 도료 로서 저온소부(60∼70℃) 10∼20분으로 점착성을 완전히 제거하여 도장라인에서 작업자들이 바로 수작업으로 핸들링이 가능하도록 한 것이 특징이다.The low temperature calcined coating composition according to the present invention is an environmentally friendly plastic coating material which has dramatically reduced VOC while maintaining the workability and film properties of the existing solvent type paint, and has low adhesive strength at low temperatures (60 to 70 ° C) for 10 to 20 minutes. It is completely removed so that the workers can directly handle it in the painting line.

또한 본 발명에 의한 저온소부형 도료 조성물은 내알코올성, 내스크래치성 및 내마모성이 우수하여 클리어 코트를 도장하지 않아도 되는 것이 특징이다.In addition, the low-temperature small-type coating composition according to the present invention is excellent in alcohol resistance, scratch resistance and abrasion resistance, and is not required to coat a clear coat.

이하, 본 발명을 실시예에 의해 상세히 설명하지만, 하기 실시예는 본 발명을 예시하는 것일 뿐, 본 발명의 내용이 하기 실시예에만 한정되는 것은 아니다.Hereinafter, the present invention will be described in detail by way of examples, but the following examples are merely illustrative of the present invention, and the content of the present invention is not limited only to the following examples.

[실시예 1]Example 1

스타이렌-아크릴 수지 [알버딩크볼리(Alberdingk Boley)사 제품] 20 중량% 및 자기가교형 아크릴 코폴리머 [알버딩크볼리(Alberdingk Boley)사 제품] 20 중량%를 배합용기에 투입한 다음, 300 RPM으로 교반하면서 탈이온수 28 중량%를 가하고 20분 후 소포제 [빅케미(BYK Chemie)사 수계 실리콘 타입 제품] 1 중량%를 투입하여 10분간 교반하였다. 그런 다음 평활제 [빅케미(BYK Chemie)사 수계 실리콘 타입 제품] 2 중량% 및 조용제로 부틸렌글리콜 6 중량%를 투입하여 다시 20분간 교반하였다. 이때 소포제나 평활제의 분산상태가 안 좋으면 제조 후 도장 작업성과 외관에 영향을 끼치므로 상태를 확인하고 미흡할 시 추가로 교반을 지속하였다. Styrene-acrylic resin [Alberdingk Boley Co., Ltd.] 20% by weight and self-crosslinking acrylic copolymer [Alberdingk Boley Co.] 20% by weight was added to the mixing vessel, 300 RPM 28 wt% of deionized water was added thereto while stirring, and after 20 minutes, 1 wt% of an antifoaming agent (BYK Chemie's aqueous silicone type product) was added thereto, followed by stirring for 10 minutes. Then, 2 wt% of a smoothing agent (BYK Chemie's aqueous silicone type product) and 6 wt% of butylene glycol were added as a co-solvent, followed by further stirring for 20 minutes. In this case, if the dispersion state of the antifoaming agent or the smoothing agent is not good, it affects the workability and appearance after the manufacture.

별도 용기에 수성도료용 알루미늄 페이스트 [에카르트베르케(Eckart Werke)사 Hydro- 제품] 5 중량% 및 조용제인 부틸렌글리콜 6 중량%를 넣고 별도 교반기로 400 RPM으로 10분간 교반하여 배합용기에 투입하고 30분간 교반을 계속하였다. 이 때 알루미늄 페이스트가 조용제에 습윤이 완전히 안 될 경우 제조 후 이물질로 작용할 수 있으므로 필요시 추가로 교반하는 것이 바람직하다.Into a separate container, 5% by weight of an aqueous paint aluminum paste [Eckart Werke Hydro-product] and 6% by weight of a coarse butylene glycol were added to a mixing vessel by stirring at 400 RPM for 10 minutes. Stirring was continued for 30 minutes. In this case, if the aluminum paste is not completely wetted with the co-solvent, it may act as a foreign material after manufacture, so it is preferable to further stir if necessary.

상기 혼합 용액에 증점제 [아베시아(Avecia)사 수계 Solthix 제품] 5 중량%를 투입하여 20분간 교반하며 중화제 [디메틸에탄올아민] 4 중량%를 이용하여 pH를 7.5-8.5로 조정하고 탈이온수 2 중량%를 사용하여 점도를 30초(Din Cup #4)로 조절한 후 마감하여 200 메쉬로 여과하여 포장하였다.5% by weight of a thickener [Avecia's aqueous Solthix product] was added to the mixed solution and stirred for 20 minutes. The pH was adjusted to 7.5-8.5 using 4% by weight of a neutralizer [dimethylethanolamine], and 2% by weight of deionized water. The viscosity was adjusted to 30 seconds (Din Cup # 4) using% followed by packing with 200 mesh filtration.

이상에서 설명한 바와 같이, 본 발명에 의한 플라스틱 도장용 저온소부형 도료 조성물은 기존 용제형 도료의 작업성과 도막물성을 유지하면서 VOC를 획기적으로 감소시켰으며, 상도도장 없이도 내마모성, 내습성 및 내알코올성 등의 우수한 도막물성을 유지할 수 있었다.As described above, the low-temperature small-type coating composition for plastic coating according to the present invention dramatically reduced VOC while maintaining workability and coating film properties of existing solvent-based paints, and abrasion resistance, moisture resistance and alcohol resistance without top coating. It was possible to maintain excellent coating film properties.

Claims (4)

수성 스타이렌-아크릴 수지 15∼50 중량%, 수성 자기가교형 아크릴 코폴리머 10∼40 중량%, 탈이온수 5∼30 중량%, 소포제 0.1∼1.0 중량%, 표면 평활제 0.2∼2.0 중량%, 조용제 5∼30 중량%, 증점제 0.5∼10 중량% 및 중화제 0.1∼5 중량%를 함유하는 플라스틱 일회 도장용 저온소부형 도료 조성물.15-50 wt% of aqueous styrene-acrylic resin, 10-40 wt% of aqueous self-crosslinking acrylic copolymer, 5-30 wt% of deionized water, 0.1-1.0 wt% of antifoaming agent, 0.2-2.0 wt% of surface leveling agent, coarse solvent A low-temperature plastic coating composition for plastic coating containing 5 to 30% by weight, 0.5 to 10% by weight thickener and 0.1 to 5% by weight neutralizer. 제 1항에 있어서, 상기 조성물은 수성도료용 알루미늄 페이스트 3∼10 중량%를 더 함유함을 특징으로 하는 조성물.The composition according to claim 1, wherein the composition further contains 3 to 10% by weight of aluminum paste for water-based paint. 1) 수성 스타이렌-아크릴 수지 15∼50 중량%, 수성 자기가교형 아크릴 코폴리머 10∼40 중량% 및 탈이온수 5∼30 중량%를 혼합하여 교반시키는 단계;1) mixing and stirring 15-50 wt% of an aqueous styrene-acrylic resin, 10-40 wt% of an aqueous self-crosslinking acrylic copolymer, and 5-30 wt% of deionized water; 2) 첨가제로서 소포제 0.1∼1.0 중량%, 표면 평활제 0.2∼2.0 중량% 및 조용제 5∼30 중량%를 가하여 혼합 용액을 제조하는 단계;2) preparing a mixed solution by adding 0.1 to 1.0 wt% of an antifoaming agent, 0.2 to 2.0 wt% of the surface leveling agent and 5 to 30 wt% of the co-solvent as an additive; 3) 수성도료용 알루미늄 페이스트 3∼10 중량% 및 조용제 3∼10 중량%를 별도 용기에 평량하여 충분히 섞은 다음 상기 2)에서 제조한 혼합 용액에 천천히 투입시키는 단계; 및3) 3 to 10% by weight of the aqueous paint aluminum paste and 3 to 10% by weight of the co-solvent in a separate container and thoroughly mixed, and then slowly added to the mixed solution prepared in 2); And 4) 증점제 0.5∼10 중량% 및 중화제 0.1∼5 중량%를 가하여 pH를 7.5-8.5로 조절하고 점도를 20∼35 초(Din Cup #4)로 조절하는 단계;4) adding 0.5 to 10% by weight of thickener and 0.1 to 5% by weight of neutralizer to adjust the pH to 7.5-8.5 and the viscosity to 20-35 seconds (Din Cup # 4); 를 포함하는 플라스틱 일회 도장용 저온소부형 도료 조성물의 제조방법.Method for producing a low-temperature baking composition for plastic one-time coating comprising a. 1) 수성 스타이렌-아크릴 수지 15∼50 중량%, 수성 자기가교형 아크릴 코폴리머 10∼40 중량% 및 탈이온수 5∼30 중량%를 혼합하여 교반시키는 단계;1) mixing and stirring 15-50 wt% of an aqueous styrene-acrylic resin, 10-40 wt% of an aqueous self-crosslinking acrylic copolymer, and 5-30 wt% of deionized water; 2) 첨가제로서 소포제 0.1∼1.0 중량%, 표면 평활제 0.2∼2.0 중량% 및 조용제 5∼30 중량%를 가하여 혼합 용액을 제조하는 단계;2) preparing a mixed solution by adding 0.1 to 1.0 wt% of an antifoaming agent, 0.2 to 2.0 wt% of the surface leveling agent and 5 to 30 wt% of the co-solvent as an additive; 3) 안료 10∼40 중량%, 분산제 3∼35 중량% 및 탈이온수 25∼87 중량%로 이루어진 농축액을 상기 2)에서 제조한 혼합 용액에 천천히 투입시키는 단계; 및3) slowly adding a concentrated solution consisting of 10 to 40% by weight of pigment, 3 to 35% by weight of dispersant and 25 to 87% by weight of deionized water to the mixed solution prepared in 2) above; And 4) 증점제 0.5∼10 중량% 및 중화제 0.1∼5 중량%를 가하여 pH를 7.5-8.5로 조절하고 점도를 20∼35 초(Din Cup #4)로 조절하는 단계;4) adding 0.5 to 10% by weight of thickener and 0.1 to 5% by weight of neutralizer to adjust the pH to 7.5-8.5 and the viscosity to 20-35 seconds (Din Cup # 4); 를 포함하는 플라스틱 일회 도장용 저온소부형 도료 조성물의 제조방법.Method for producing a low-temperature baking composition for plastic one-time coating comprising a.
KR1020040092896A 2004-11-15 2004-11-15 Low-bake paint composition for painting plastics KR20060047069A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100990259B1 (en) * 2009-10-23 2010-10-26 이병태 Screen coating composition for 3d display and screen coating method therewith
KR101136484B1 (en) * 2009-12-29 2012-04-19 주식회사 노루홀딩스 Insulation Coating Material Of Non-Orient Electrical Steel Sheet, Method Of Manufacturing And Insulation Coating Material And Method Of Forming Insulation Coating Layer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100990259B1 (en) * 2009-10-23 2010-10-26 이병태 Screen coating composition for 3d display and screen coating method therewith
KR101136484B1 (en) * 2009-12-29 2012-04-19 주식회사 노루홀딩스 Insulation Coating Material Of Non-Orient Electrical Steel Sheet, Method Of Manufacturing And Insulation Coating Material And Method Of Forming Insulation Coating Layer

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