KR100528319B1 - A composite of electromagnetic shielding plaster - Google Patents
A composite of electromagnetic shielding plaster Download PDFInfo
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- KR100528319B1 KR100528319B1 KR10-2004-0033660A KR20040033660A KR100528319B1 KR 100528319 B1 KR100528319 B1 KR 100528319B1 KR 20040033660 A KR20040033660 A KR 20040033660A KR 100528319 B1 KR100528319 B1 KR 100528319B1
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/24—Electrically-conducting paints
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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
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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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
- 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
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Abstract
본 발명은 전자파 차폐 기능을 갖도록 하는 건축용 바름재에 관한 것으로 탄소계 재료 및 세라믹 재를 포함하여 구성된 전자파 차폐 무기질계 바름재 조성물에 관한 것으로, 본 발명에 따른 전자파 차폐 조성물은 도전성 물질이 0.1 내지 1.0mm 입도의 흑연분말과 모나자이트 분말이 1:0.5～20의 비율로 혼합된 것을 결합재 100중량부에 대하여 5 내지 50중량부 첨가하여 구성된 것에 충전재중 0.1 ～ 1mm 입도의 분말상의 세라믹 재료인 하소 명반석을 결합재 100중량부에 대하여 30 ～ 70중량부 첨가하여서 된 것을 특징으로 하여 일상 생활환경에서 인체가 가장 흔하게 노출될 수 있는 주파수 영역의 전자파에 대한 우수한 차폐효과를 제공하여 청정한 생활환경용 건축자재로서 유효하게 사용될 수 있는 효과를 갖는다.The present invention relates to a building coating material having an electromagnetic shielding function, and to an electromagnetic shielding inorganic coating material composition comprising a carbon-based material and a ceramic material, the electromagnetic shielding composition according to the present invention is 0.1 to 1.0 conductive material. It is composed by mixing 5 to 50 parts by weight of graphite powder and monazite powder in a ratio of 1: 0.5 to 20 parts by weight with respect to 100 parts by weight of the binder, and calcined alumite, which is a powdery ceramic material with a particle size of 0.1 to 1 mm in the filler. It is effective as a building material for a clean living environment by providing excellent shielding effect against electromagnetic waves in the frequency range where the human body is most commonly exposed in the daily living environment, by adding 30 to 70 parts by weight based on 100 parts by weight of the binder. Has an effect that can be used.
Description
본 발명은 건축물의 내장재 또는 외장재로 사용될 수 있는 전자파 차폐 무기질계 도료 조성물에 판한 것으로, 더욱 상세하게는 무기질계 결합제, 수지, 전도성 물질, 충전재를 주성분으로 하는 건축용 전자파 차폐 조성물에 있어서, 전도성 물질로 흑연 분말과 모나자이트를 사용함으로써 전자파 차폐 효율이 높아 일반적으로 흔하게 노출될 수 있는 전자파를 효율적으로 차폐할 수 있는 전자파 차폐 무기질계 바름재 조성물을 제공하는 것이다.The present invention is directed to an electromagnetic wave shielding inorganic coating composition that can be used as an interior or exterior material of a building, and more particularly, in an electromagnetic wave shielding composition for a building comprising an inorganic binder, a resin, a conductive material, and a filler as a conductive material, The use of graphite powder and monazite provides an electromagnetic shielding inorganic coating material composition that can efficiently shield electromagnetic waves that can be commonly exposed due to high electromagnetic shielding efficiency.
전자파는 매질을 지나면서 투과, 흡수 및 반사가 일어나며, 이러한 현상들은 매질의 종류와 형상 등에 영향을 받으며, 매질의 전자기적 성질에 따라 흡수체와 반사체로 구분될 수 있다.Electromagnetic waves are transmitted, absorbed, and reflected as they pass through the medium. These phenomena are affected by the type and shape of the medium, and may be classified into absorbers and reflectors according to the electromagnetic properties of the medium.
전자파 흡수체는 반사보다 흡수의 영역이 더 큰 물질을 의미하며 전자파 흡수는 크게 도전손실, 유전손실 또는 자성손실에 의해 일어나는 것으로 알려져 있으며, 일반적으로 도전 손실은 금속 등과 같은 전도성 물질에서 유전손실은 티탄산바륨과 같은 유전성 물질에서 그리고 자성손실은 페라이트 등과 같은 자성물질에서 주로 일어나며 목적에 따라 이들 중 적절한 물질을 사용하여 전자파를 흡수하는데 사용할 수 있는 것으로 공지되어 있다.An electromagnetic wave absorber means a material having a larger area of absorption than reflection, and electromagnetic wave absorption is known to be caused largely by conduction loss, dielectric loss, or magnetic loss. In general, the conduction loss is a conductive material such as metal, and the dielectric loss is barium titanate. It is known that in dielectric materials such as and magnetic losses mainly occur in magnetic materials such as ferrite and the like, and may be used to absorb electromagnetic waves using appropriate materials among them according to the purpose.
일본구 특개평3-217466호는 내습윤성이 우수한 불연성 무기계 전도성 도료 조성물을 기술하고 있는데, 이는 전도성 분말과 일반식M20·nSiO2(M:Li,Na,K,n:몰비)로 표시되는 혼합수용성규산염 가운데, 적어도 Li염 및 Na염을 포함하고, 혼합수용성 규산염의 몰 조성은 [0.40∼0.75Li20·0.25∼0.60(Na20-K20)]·3∼3.5SiO2(단, Na20＞K20,Li20+Na20+K20=1)이고, 상기 혼합수용성 규산염의 수용액의 농도가 25∼35중량％이고, 상기 수용액에 대한 전도성 분말의 배합비율이 중량비로 0.4∼1.0인 것을 특징으로 하고 있으며, 전도성 분말로는 은가루, 나켈, 구리분말, 카본분말, 질화티탄분말, 이들의 분에 표면처리한 것, 마이카 또는 세리사이트 등의 무기분말을 양도성금속으로 피복한 것 등을 사용하였고, 바람직하게는 구리분말과 니켈분말이라고 기술하고 있다.Japanese Patent Laid-Open No. 3-217466 describes a non-flammable inorganic conductive coating composition having excellent wettability, which is a mixed water soluble represented by a conductive powder and a general formula M20 · nSiO 2 (M: Li, Na, K, n: molar ratio). Among the silicates, at least Li salts and Na salts are included, and the molar composition of the mixed water-soluble silicate is [0.40 to 0.75 Li20 · 0.25 to 0.60 (Na20-K20)]. + K20 = 1), the concentration of the aqueous solution of the mixed water-soluble silicate is 25 to 35% by weight, and the mixing ratio of the conductive powder to the aqueous solution is 0.4 to 1.0 by weight, and the conductive powder is silver powder. , Nickel, copper powder, carbon powder, titanium nitride powder, surface-treated on these powders, and inorganic powders such as mica or sericite coated with a transferable metal, and the like, and preferably copper powder and nickel powder It is described.
일본국 특개소62-153155호는 전자파 흡수제에 대하여 설명하고 있는데, 구체적으로 포틀랜드 시멘트 25중량％, 수재55중량％중에 수재와 용량비 24％ 내지 50％의 흑연을 포함하고, 액상 유기중합체 수성 에멀젼 20중량％를 혼합한 것을 특징으로 하며, 도전성 물질로 흑연만을 사용하고 있어 전자파 차폐 효율이 그다지 높지 않은 문제점이 있었다.Japanese Patent Application Laid-Open No. 62-153155 describes an electromagnetic wave absorber. Specifically, 25% by weight of Portland cement and 55% by weight of a resin include graphite in water and a volume ratio of 24% to 50%, and a liquid organic polymer aqueous emulsion 20 It is characterized by mixing the weight%, and only graphite is used as the conductive material, so that electromagnetic wave shielding efficiency is not so high.
극내 특허등록 제281697호는 도전성복합물에 있어, 도전성 재료가 0.05 내지 7.7mm의 입도를 갖는 입자형 탄소재료와 2 내지 40mm의 길이를 갖는 섬유형 탄소재료가 100:0.5∼100:140의 중량비로 혼합된 도전성 복합물에 대하여 기술하여 기술하고 있으며 효과로서 본 특허에 의한 혼합물을 도전성 재료로 사용하여 전기응용분야에 적용이 가능한 수준인 1 내지 10 Ω-cm 정도로 낮출 수 있다고 기재하고 있을 뿐, 구체적으로 차폐 가능한 전자파 대역에 대한 구체적인 기술이 전혀 없는 문제점이 있다.Intra-patent patent No. 281697 has a weight ratio of 100: 0.5 to 100: 140 for a conductive composite in which the conductive material has a particulate carbon material having a particle size of 0.05 to 7.7 mm and a fibrous carbon material having a length of 2 to 40 mm. The mixed conductive composites are described and described. As an effect, the mixture according to the present patent is used as the conductive material, and it can be lowered to about 1 to 10 Ω-cm, which is a level applicable to electrical applications. There is a problem that there is no specific technology for the shieldable electromagnetic wave band.
본 발명자는 이와 같은 종래의 전자파 차폐재료의 문제점을 개선하기 위해 연구를 계속한 결과, 공지의 흑연분말에 음이온의 발생 및 원적외선 방사효율이 우수한 재료로만 알려져 있는 모나자이트를 혼합 사용하는 경우 상호 보완 작용에 의하여 전자파 차폐 효과가 공지의 여타 재료보다 탁월한 물성을 나타냄을 확인하고, 본 발명을 완성하게 되었다.The present inventors have continued to improve the problems of the conventional electromagnetic shielding material, and as a result, in the case of using a mixture of monazite known only as a material having excellent generation of negative ions and far-infrared radiation efficiency in known graphite powder, As a result, it was confirmed that the electromagnetic wave shielding effect exhibited superior physical properties than other known materials, thereby completing the present invention.
본 발명은 도전성 물질로서 흑연 분말과 음이온 방출 및 원적외선 방사효과만 우수한 것으로 알려진 모나자이트 분말을 혼합하여 사용함으로써 전자파 차폐 효율을 높인 전자파 차폐용 무기질계 바이오 바름재 조성물을 제공하는 것이다.The present invention provides an inorganic bio-based material composition for electromagnetic wave shielding by increasing the electromagnetic wave shielding efficiency by using a mixture of graphite powder and a monazite powder known to have excellent anion emission and far-infrared radiation effects as a conductive material.
본 발명에 의한 전자파 차폐 무기질계 바름재 조성물은 도전성 물질, 결합재, 충전재, 혼합재, 수지 및 혼화제로 이루어지며, 상기 도전성 물질이 0.1 내지 1.0mm 입도의 흑연분말과 분말도 5500 메쉬의 모나자이트 분말이 1: 0.5∼20의 비율로 혼합된 것을 결합재 100중량부에 대하여 5 내지 50 중량부의 비율로 혼합하는 것과 700℃∼900℃의 고온에서 소성 가공한 세라믹 분말을 충전재 전체 중량당 30∼70중량부로 첨가하여 상온에서 전자파 차폐 특성을 갖는 건축물 내외장재용 무기질계 바름재 조성물을 제공하는 것이다.The electromagnetic wave shielding inorganic coating material composition according to the present invention is composed of a conductive material, a binder, a filler, a mixture, a resin, and a admixture. The conductive material is a graphite powder having a particle size of 0.1 to 1.0 mm and a powder of 5,500 mesh monazite powder. : A mixture of 0.5 to 20 parts by weight is mixed at a ratio of 5 to 50 parts by weight with respect to 100 parts by weight of the binder, and 30 to 70 parts by weight of the ceramic powder calcined at a high temperature of 700 to 900 ° C. is added per filler. To provide an inorganic coating material composition for interior and exterior building materials having electromagnetic shielding properties at room temperature.
이하, 본 발명을 상세히 설명하면 아래와 같다.Hereinafter, the present invention will be described in detail.
본 발명의 전자파 차폐 무기질계 도료 조성물에 사용되는 결합재로는 일반 시멘트를 모두 사용할 수 있으며 그 중에서 보통 포틀랜드 시멘트, 슬래그 시멘트, 플라이 애쉬 시멘트, 알루미나 시멘트, 백 시멘트로부터 선택되는 1종 이상을 사용할 수 있다.As the binder used in the electromagnetic wave shielding inorganic coating composition of the present invention, all cements may be used, and among them, at least one selected from portland cement, slag cement, fly ash cement, alumina cement and white cement may be used. .
본 발명에 따른 전자파 차폐 무기질계 도료 조성물에 사용되는 수지로는 아크릴계로 결합재 100중량부에 대하여 5 내지 50중량부가 바람직하다. 이때, 수지의 함량이 5중량부 미만인 경우에는 조성물의 부착강도가 낮아지고 유변학적인 특성변화에 따른 박막 시공이 불가능하게 되고, 50중량부를 초과하는 경우에는 점성이 증가하고 기포가 발생하는 등 적절한 작업성 확보 및 도막형성이 어렵게 됨으로써 차폐 특성이 저하되는 문제점이 있다.As resin used for the electromagnetic wave shielding inorganic coating composition which concerns on this invention, 5-50 weight part is preferable with respect to 100 weight part of binders with acryl-type. At this time, when the content of the resin is less than 5 parts by weight, the adhesion strength of the composition is lowered and thin film construction is impossible due to the change in rheological properties, and when the content is more than 50 parts by weight, the viscosity increases and bubbles are generated. There is a problem that the shielding properties are lowered due to the difficulty in securing the properties and forming the coating film.
본 발명에 따른 전자파 차폐 무기질계 바름재 조성물에 전기전도성을 부여하기 위하여 첨가되는 흑연 분말은 입자형으로, 분말 입도는 0.1 내지 1.0mm이 바람직하다. 이때, 흑연분말의 입도가 0.1mm 미만인 경우에는 조성물에 전자파 차폐 특성을 부여할 수 없고, 1.0mm를 초과하는 경우에는 작업성이 저하되어 바람직하지 못하다.Graphite powder added in order to impart electrical conductivity to the electromagnetic wave shielding inorganic coating material composition according to the present invention has a particle shape, and the powder particle size is preferably 0.1 to 1.0 mm. At this time, when the particle size of the graphite powder is less than 0.1mm, electromagnetic shielding properties cannot be imparted to the composition, and when the particle size exceeds 1.0mm, workability is lowered, which is not preferable.
또한, 전도성을 부여하기 위하여 본 발명의 전자파 차폐 조성물에 특징적으로 첨가되는 모나자이트는 분말도가 5500 메쉬 통과율 90％ 이상의 것이 바람직하다. 이러한 모나자이트의 사용량은 흑연분말 1에 대하여 0.5 내지 20이 바람직하다.In addition, the monazite, which is characteristically added to the electromagnetic wave shielding composition of the present invention in order to impart conductivity, preferably has a powder degree of 5500 mesh pass rate of 90% or more. The amount of monazite to be used is preferably 0.5 to 20 with respect to graphite powder 1.
본 발명에 따른 도전성 혼합 물질은 결합재 100중량부에 대하여 5 내지 50중량부의 비율로 첨가되는 것이 바람직한데, 도전성 혼합물질의 함량이 5중량부 미만인 경우에는 차폐효율이 크게 낮아지거나 차폐기능이 상실될 우려가 있고, 50중량부를 초과하는 경우에는 조성물을 건축 외장재로 도포하는 등 최종작업을 하였을 경우 표면상태가 불량해지고 응결이 지연되는 문제점이 있어 바람직하지 못하다.The conductive mixed material according to the present invention is preferably added at a ratio of 5 to 50 parts by weight with respect to 100 parts by weight of the binder. When the content of the conductive mixture is less than 5 parts by weight, the shielding efficiency may be greatly lowered or the shielding function may be lost. There is a concern that, if the amount exceeds 50 parts by weight, the final work such as applying the composition to the building exterior material is not preferable because the surface condition is poor and the condensation is delayed.
이외에도, 강도를 높이고 작업성을 향상시키기 위하여 충전재가 첨가될 수 있는데, 이러한 충전재로는 주로 탄산칼슘과 세라믹 분말인 하소 명반석 분말을 사용하며 결합재 100중량부에 대하여 30 내지 200중량부를 첨가할 수 있다.In addition, fillers may be added to increase strength and improve workability. The filler may be calcined alumite powder, which is mainly calcium carbonate and ceramic powder, and may be added in an amount of 30 to 200 parts by weight based on 100 parts by weight of the binder. .
조성물에 혼합되어 있는 도전성물질의 분산을 돕기 위하여 유동화제를 첨가할 수 있으며, 이러한 유동화제로는 나프탈렌계, 멜라민계 등이 사용될 수 있고, 결합재 100중량부에 대하여 0.3 내지 5중량부가 바람직하다.A fluidizing agent may be added to assist in the dispersion of the conductive material mixed in the composition, and as such a fluidizing agent, naphthalene-based or melamine-based may be used, and 0.3 to 5 parts by weight based on 100 parts by weight of the binder is preferable.
조성물의 점도를 조절하기 위한 증점제 및 도포 후 표면상태를 균일성을 향상시키기 위한 소포제가 결합재 100중량부에 대하여 각각 0.1 내지 3중량부, 0.1 내지 5중량부 첨가될 수 있다.A thickener for adjusting the viscosity of the composition and an antifoaming agent for improving the uniformity of the surface state after application may be added in an amount of 0.1 to 3 parts by weight and 0.1 to 5 parts by weight based on 100 parts by weight of the binder, respectively.
상기에서 언급한 충전재 일부와 증점제, 유동화제, 소포제 등은 시멘트 조성물 등에 일반적으로 사용되는 것으로, 본 발명을 위하여 특별히 한정되는 것은 아니다.Some of the fillers mentioned above, thickeners, glidants, antifoams and the like are generally used in cement compositions and the like, and are not particularly limited for the present invention.
이하, 본 발명을 실시예를 들어 더욱 상세히 설명하면 아래와 같고, 본 발명이 하기 실시예의 의해 제한되는 것온 아니며, 특허청구의 범위를 벗어나지 않는 범위 내에서 본 발명의 기술이 속하는 분야의 당업자에 의해 변형될 수 있음은 자명하다.Hereinafter, the present invention will be described in more detail with reference to the following examples, the present invention is not limited by the following examples, modified by those skilled in the art to which the technology of the present invention belongs without departing from the scope of the claims It can be obvious.
실시예Example
결합재인 포틀랜드 시멘트, 폴리비닐아세테이트 재유화형 분말수지, 입도가 0.5mm인 흑연분말, 직경대 두께의 비가 35 이고 입도가 0.2mm인 모나자이트 분말, 탄산칼슘, 하소 명반석 및 멜라민계 유동화제, 증점제, 소포제로 구성된 혼화제로 구성되고 하기 표 1과 같은 조성비율을 갖는 본 발명에 따른 전자파 차폐 무기질계 바름재 조성물의 차폐율, 표면상태 및 작업성을 하기 표 2에 나타내었다.Portland cement as binder, polyvinylacetate reemulsifying powder resin, graphite powder with particle size of 0.5mm, monazite powder with diameter to thickness of 35mm, calcium carbonate, calcined alum and melamine fluidizing agent, thickener, antifoaming agent Shielding rate, surface state and workability of the electromagnetic wave shielding inorganic coating material composition according to the present invention composed of a admixture consisting of and having a composition ratio as shown in Table 1 are shown in Table 2 below.
* 시험방법* Test Methods
실시예 1 내지 5 및 비교예 1 내지 5와 같이 제조된 조성물과 물을 충분히 혼합한 후, 에어 스프레이건을 이용하여 가로, 세로 1m크기의 시멘트 압출 성형 판에 0.5mm두께로 도장한 후, 무기 도료로서의 물리적 특성을 측정하였다. 또한, 전자파 차폐 효과를 측정하기 위하여 ASTM D4935-99(30㎒-1.5㎓)에 의거하여 폴리에스테르 필름에 0.5mm 두께로 도장한 후 3일 동안 상대습도 65％± 3℃, 온도 23± 3℃에서 양생한 후 측정하였다.After mixing the composition prepared in Examples 1 to 5 and Comparative Examples 1 to 5 and water sufficiently, using an air spray gun and coated with a 0.5mm thickness on a cement extrusion plate of 1m size, horizontal, vertical Physical properties as paints were measured. In addition, in order to measure the electromagnetic wave shielding effect, the film was coated with a polyester film with a thickness of 0.5 mm according to ASTM D4935-99 (30 MHz-1.5 Hz), and then the relative humidity was 65% ± 3 ° C. for 3 days and the temperature was 23 ± 3 ° C. It was measured after curing at.
이상에서 살펴본 바와 같이, 본원발명에 따른 전자파 차폐 무기질계 바름재 조성물은 작업성이 용이하면서도 전자파 차폐 효율이 우수하여 일상 생활에서 쉽게 노출될 수 있는 전자파를 효율적으로 차단할 수 있는 효과를 갖는 아주 유용한 발명인 것이다.As described above, the electromagnetic wave shielding inorganic coating material composition according to the present invention is a very useful invention having an effect that can effectively block the electromagnetic waves that can be easily exposed in daily life due to easy workability and excellent electromagnetic shielding efficiency will be.
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