KR100319072B1 - Process for preparing coating composition - Google Patents

Process for preparing coating composition Download PDF

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KR100319072B1
KR100319072B1 KR1020000038430A KR20000038430A KR100319072B1 KR 100319072 B1 KR100319072 B1 KR 100319072B1 KR 1020000038430 A KR1020000038430 A KR 1020000038430A KR 20000038430 A KR20000038430 A KR 20000038430A KR 100319072 B1 KR100319072 B1 KR 100319072B1
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weight
parts
water
composition
coating composition
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KR1020000038430A
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KR20000063403A (en
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박홍욱
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배종렬
삼성물산 주식회사
박홍욱
(주)세라켐
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Priority claimed from KR1019990027143A external-priority patent/KR19990073370A/en
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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
    • C09D1/06—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances cement
    • C09D1/08—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances cement with organic additives
    • 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
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • 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
    • C08K3/34—Silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
    • C08L1/02—Cellulose; Modified cellulose
    • 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
    • C09D7/43—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
    • C09D7/60—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

Abstract

백시멘트 5∼35중량부; 탄산칼슘 20∼50중량부, 규사 5∼35중량부 및 고로 슬랙 5∼35중량부으로 이루어진 필러; 재유화형 분말 수지 3∼25중량부; 증점제 0.05∼0.3중량부; 및 소포제 0.1∼0.5 중량부로 이루어진 분말형 무기계 베이스 코팅 조성물을 조제하고, 여기에 물을 가하여 수화반응을 일으켜 얻어지는 슬러리상의 조성물에 적용시키기 위하여, 콜로이달 실리카에 대하여 10∼25중량배의 물을 가하고 교반하여 혼합액을 제조한 후, 산을 가하여 그의 pH가 2.5∼4.0로 조정하고, 이와 별도로 메틸 트리메톡시실란 또는 n-디트리메톡시실란으로부터 선택된 실란계 화합물을 2∼8배량의 수용성 저급 알코올에 가하고, 교반하여 균일한 혼합물을 얻은 후, 상기 콜로이달 실리카 혼합액과 상기 실란 화합물의 저급 알코올 혼합물을 약 1:9∼2:8의 중량비로 혼합하고, 교반한 후, 숙성하는 상기 실란계 화합물을 무기계의 실리카상의 올리고머 또는 폴리머로 전환시킴을 특징으로 하는 졸상의 마감제 코팅 조성물의 제조방법에 관한다.5 to 35 parts by weight of back cement; Filler consisting of 20 to 50 parts by weight of calcium carbonate, 5 to 35 parts by weight of silica sand and 5 to 35 parts by weight of blast furnace slag; 3 to 25 parts by weight of reemulsifying powder resin; 0.05 to 0.3 parts by weight of a thickener; And a powdery inorganic base coating composition composed of 0.1 to 0.5 parts by weight of an antifoaming agent, and 10 to 25 weight times of water is added to the colloidal silica in order to apply it to the slurry-like composition obtained by adding water to the hydration reaction. After the mixture was prepared by stirring, an acid was added to adjust the pH thereof to 2.5 to 4.0, and separately, a silane compound selected from methyl trimethoxysilane or n-ditrimethoxysilane was used in an amount of 2 to 8 times higher water-soluble lower alcohol. After adding to the mixture and stirring to obtain a uniform mixture, the lower alcohol mixture of the colloidal silica mixture solution and the silane compound was mixed at a weight ratio of about 1: 9 to 2: 8, stirred, and then aged to the silane compound. To a process for producing a sol-like finish coating composition characterized by converting .

본 발명에 의해 제조된 조성물은 무기계 베이스 코팅 조성물에 물을 가하여 얻어지는 액상 조성물은 재유화 분말수지를 제외한 모두 무기성분으로 결합성이 우수하나, 물과 접촉하면 반복적으로 용해되어 전체 조성물의 기계적, 물리적, 화학적 성질을 크게 감소시킨다. 이러한 문제를 해결하기 위하여 외부에서 침투되는 물을 차단하고, 경우에 따라서는 프라이머 역할을 하는 마감제 코팅 조성물을 제공하는 것이다. 이 마감제 코팅 조성물은 실란 유도체는 pH 조정제로 조성물을 산성으로 함에 따라 산가수분해를 일으켜 알코올 부분을 이탈되어 증발되고, 잔여하는 부문은 무기질의 실리카 결합으로 전환되어 전체 성분이 무기질로 존재하고, 이러한 조성물을 도포한 후, 건조되면, 졸상에서 겔상으로 변환되어 수불용성으로 되어 물이나 수분에 용해되지 않고, 또한 통기성이 우수하여 수분 침입에 의한 백화현상, 표면 박리 등의 문제점이 발생하지 않고, 도막의 두께를 후막화하여도 어떠한 문제도 발생하지 않는다. 또한, 구조물, 타일 등에 도포하여도 우수한 결합성 등을 갖는 도막을 형성할 수 있다.The composition prepared according to the present invention is a liquid composition obtained by adding water to the inorganic base coating composition, but all have excellent binding properties as inorganic components except for re-emulsified powder resin, but repeatedly dissolved in contact with water, mechanical and physical , Greatly reduces the chemical properties. In order to solve this problem is to provide a finish coating composition to block the water penetrated from the outside, and in some cases serves as a primer. This finish coating composition is characterized in that the silane derivatives are acid hydrolyzed as the composition is pH-adjusted, causing acid hydrolysis to leave the alcohol moiety and evaporating, while the remaining sections are converted to inorganic silica bonds and the entire component is present as inorganic. When the composition is applied and then dried, it is converted into a gel form from a sol to become water insoluble and insoluble in water or moisture, and excellent in breathability, and does not cause problems such as whitening and surface peeling due to moisture intrusion. Even if the thickness of the film is thickened, no problem occurs. Moreover, even if it apply | coats to a structure, a tile, etc., the coating film which has the outstanding bond etc. can be formed.

Description

마감제 코팅 조성물의 제조방법 {PROCESS FOR PREPARING COATING COMPOSITION}Process for producing finish coating composition {PROCESS FOR PREPARING COATING COMPOSITION}

본 발명은 콜로이달 실리카에 대하여 10∼25중량배의 물을 가하고 교반하여 혼합액을 제조한 후, 산을 가하여 그의 pH가 2.5∼4.0로 조정하고,이와 별도로 메틸 트리메톡시실란 또는 n-디트리메톡시실란으로부터 선택된 실란계 화합물을 2∼8배량의 수용성 저급 알코올에 가하고, 교반하여 균일한 혼합물을 얻은 후,상기 콜로이달 실리카 혼합액과 상기 실란 화합물의 저급 알코올 혼합물을 약 1:9∼2:8의 중량비로 혼합하고, 교반한 후, 숙성하여 상기 실란계 화합물을 무기계의 실리카상의 올리고머 또는 폴리머로 전환시킴을 특징으로 하는 졸상의 마감제 코팅 조성물의 제조방법에 관한 것이다. 더 상세히는 백시멘트 5∼35중량부; 탄산칼슘 20∼50중량부, 규사 5∼35중량부 및 고로 슬랙 5∼35중량부으로 이루어진 필러; 재유화형 분말 수지 3∼25중량부; 증점제 0.05∼0.3중량부; 및 소포제 0.1∼0.5 중량부로 이루어진 분말형 무기계 베이스 코팅 조성물을 조제하고, 여기에 물을 가하여 수화반응을 일으켜 얻어지는 슬러리상의 조성물을 적용시키기 위하여, 콜로이달 실리카에 대하여 10∼25중량배의 물을 가하고 교반하여 혼합액을 제조한 후, 산을 가하여 그의 pH가 2.5∼4.0로 조정하고, 이와 별도로 메틸 트리메톡시실란 또는 n-디트리메톡시실란으로부터 선택된 실란계 화합물을 2∼8배량의 수용성 저급 알코올에 가하고, 교반하여 균일한 혼합물을 얻은 후, 상기 콜로이달 실리카 혼합액과 상기 실란 화합물의 저급 알코올 혼합물을 약 1:9∼2:8의 중량비로 혼합하고, 교반한 후, 숙성하여 상기 실란계 화합물을 무기계의 실리카상의 올리고머 또는 폴리머로 전환시킴을 특징으로 하는 졸상의 마감제 코팅 조성물의 제조방법에 관한 것이다.According to the present invention, 10-25 weight times of water is added to the colloidal silica and stirred to prepare a mixed solution, and then acid is added thereto to adjust its pH to 2.5-4.0, and methyl trimethoxysilane or n-ditri After adding a silane compound selected from methoxysilane to 2 to 8 times the amount of water-soluble lower alcohol and stirring to obtain a uniform mixture, the lower alcohol mixture of the colloidal silica mixture solution and the silane compound is about 1: 9 to 2: A method for producing a sol-like finish coating composition characterized by mixing in a weight ratio of 8, stirring, and then aging to convert the silane compound into an oligomer or polymer on inorganic silica. More specifically 5 to 35 parts by weight of cement; Filler consisting of 20 to 50 parts by weight of calcium carbonate, 5 to 35 parts by weight of silica sand and 5 to 35 parts by weight of blast furnace slag; 3 to 25 parts by weight of reemulsifying powder resin; 0.05 to 0.3 parts by weight of a thickener; And 0.1 to 0.5 parts by weight of an antifoaming agent to prepare a powdery inorganic base coating composition, and in order to apply a slurry-like composition obtained by hydration by adding water thereto, 10 to 25 weight times of water is added to colloidal silica. After the mixture was prepared by stirring, an acid was added to adjust the pH thereof to 2.5 to 4.0, and separately, a silane compound selected from methyl trimethoxysilane or n-ditrimethoxysilane was used in an amount of 2 to 8 times higher water-soluble lower alcohol. After adding to the mixture, stirring to obtain a uniform mixture, the lower alcohol mixture of the colloidal silica mixture solution and the silane compound was mixed in a weight ratio of about 1: 9 to 2: 8, stirred, and then aged to mature the silane compound. To a process for producing a sol-like finish coating composition characterized by converting A.

종래 시멘트 콘크리트의 표면에 페인트를 도포하거나, 또는 타일 등을 부착하여 시멘트 구조물을 보호하여 왔다. 그러나, 최근 환경 악화로 인하여 매연 및 산성비로 인하여 건축물의 외면이 부식하거나, 또는 부착된 타일이 떨어지게 되는 등 여러 문제가 발생하고 있다. 따라서, 시멘트 구축물이나 타일 표면에 도막제를 적용하여 내후성, 접착성, 내마모성, 내약품성, 내수성, 난연성 등을 향상시키기위한 기술이 시도되고 있다.In the past, paint has been applied to the surface of cement concrete, or tiles have been attached to protect the cement structure. However, recently, due to environmental degradation, soot and acid rain have caused various problems such as corrosion of the exterior surface of the building or falling of the attached tiles. Therefore, a technique has been attempted to improve weather resistance, adhesion, wear resistance, chemical resistance, water resistance, flame retardancy, etc. by applying a coating agent to a cement structure or tile surface.

그러나, 종래 사용되는 폴리머 시멘트계 도막제의 경우 도막 두께가 증가함에 따라 경화시 응고 수축에 따른 균열이 발생하는 문제점과 내수성이 매우 취약하기 때문에 수분과 직·간접적으로 접촉하게 되면 도막이 열화되어 접착강도와 표면경도가 급격하게 저하하는 등의 문제점을 가지고 있어 소재를 보호하는 역할에 한계가 있기 때문에, 피도물의 종류에 많은 제한을 받고 있는 실정이다.However, in the case of the conventional polymer cement-based coating agent, as the thickness of the coating film increases, cracks due to solidification shrinkage during curing and water resistance are very weak. Therefore, when contacted directly or indirectly with moisture, the coating film deteriorates and Since the surface hardness has a problem such as a sharp decrease, there is a limit to the role of protecting the material, it is a situation that is much limited to the type of the workpiece.

이러한 문제점을 개선하기 위하여 무기질 분말의 조성을 변화시킨다든가, 충진제의 입도를 치밀화하는 기술(예, 일본특허공개 평8-208302호, 일본특허공개 평8-120192호, 일본특허공개 평10-120938호, 일본특허공개 평11-35363호, 일본특허공개 평11-16317호, 일본특허공개 평11-171627호 등)에 관한 발명이 개시되어 있으나, 이들 발명은 모두 (백)시멘트, 골재 등으로 구성되어 있으며, 이들은 근본적으로 수분에 대한 안정성에는 효과적이지 못하여 도막의 열화에 따른 균열, 박리 및 구조물의 내부로부터 침입하는 수분에 대해 도막층과 상이하여 균열, 박리, 백화현상 등의 문제점을 가지고 있는 실정이다.In order to improve such a problem, a technique of changing the composition of the inorganic powder or densifying the particle size of the filler (for example, Japanese Patent Application Laid-open No. Hei 8-208302, Japanese Patent Application Laid-open No. Hei 8-120192, Japanese Patent Application Laid-Open No. 10-120938) , Japanese Patent Application Laid-Open No. 11-35363, Japanese Patent Application Laid-Open No. 11-16317, Japanese Patent Application Laid-Open No. 11-171627, etc.), but these inventions are all composed of (white) cement, aggregate, and the like. They are fundamentally ineffective for stability against moisture, and thus have problems such as cracking, peeling, whitening, etc., because they are different from the coating layer with respect to the cracks, peeling, and moisture invading from inside of the structure due to deterioration of the coating. to be.

이러한 문제점은 오래된 건축물이나 시멘트 콘크리트 구조물에서 특히 심각한 문제가 발현되기 때문에, 이를 해결하기 위하여 방수제 또는 발수제를 도포하여 해결하고자 하나, 이러한 방수층 자체가 기존층과의 접착성이 좋지 못하여 박리되는 현상이 되풀이되고 있다.This problem is particularly serious in older buildings and cement concrete structures, so in order to solve this problem by applying a waterproofing agent or a water repellent, this waterproof layer itself is not good adhesion to the existing layer is repeatedly peeled phenomenon. It is becoming.

또한, 종래 콘크리트 외벽, 타일, 적벽돌 등의 외부를 도포하여 도막을 형성하고, 내오염성 등의 문제 때문에 이 도막층위에 상도층을 형성하였다. 종래 시멘트 등의 몰타르와 합성수지와 같은 수불용성 유기물질 및 계면활성제로 구성된 베이스 코팅 조성물은 수분을 차단하고, 또한 이러한 조성물의 베이스 코팅위에 베이스 코팅 성분중의 합성수지와 동류의 상도코팅을 하기 때문에 코팅 초기에는 외부로부터 빗물 등의 수분의 침입을 차단하는 것으로 생각되기 쉬우나, 실제로는 빗물 등이 건축물중의 콘크리트 내부에 존재하는 기공(대부분 약 16％ 이상의 기공 존재)을 통하여 수분이 침투하게 되고, 이렇게 침투된 수분은 건축물 외부에 도막된 유기질 코팅성분을 통과할 수 없게 되어 상도층 내부에서 백화현상이 일어나고, 더 심각한 경우에는 도막층이 박리되는 현상이 발생한다.In addition, a coating film is formed by coating the exterior of a conventional concrete outer wall, tile, red brick, or the like, and a top coat layer is formed on the coating layer due to problems such as stain resistance. The base coating composition composed of water-insoluble organic substances such as cement and mortar and synthetic resins and surfactants in the related art blocks the moisture and also coats the top coating of the synthetic resin in the base coating component on the base coating of the composition. While it is easy to think of blocking the intrusion of moisture such as rainwater from the outside, in reality, the rainwater or the like penetrates through the pores existing in the concrete inside the building (mostly porosity of about 16% or more). The moisture cannot pass through the organic coating component coated on the exterior of the building, so that whitening occurs inside the top coat layer, and in more serious cases, the coating layer is peeled off.

본 발명자는 상기의 문제점을 개선하기 위하여 예의 연구한 결과, 결합제로서 포틀랜드 시멘트에 비하여 철분이 적은 백시멘트를 사용하고, 필러로서 고철 슬랙, 규사 및 탄산칼슘을 사용하여 수분에 대한 저항성을 보완하며, 도막두께의 후막화에 따른 균열을 방지하고, 장기적인 결합력을 증가시키며, 또한, 재유화형 수지분말을 배합하여 물리적인 결합력과 유연성을 향상시키며, 이들 조성성분이 재유화형 수지분말 이외는 모두 무기질 성분이며, 재유화형 수지분말은 이들 무기질 성분을 결합시키는 역할만 하도록 소량 배합하여 이 조성물로 형성된 도막은 내부 콘크리트 등의 구축물과 미세한 기공을 통한 통기성을 유지하게 하고, 또한 이러한 조성물로 베이스 코팅한 후,이와 별도로 위에 콜로이달 실리카에 물을 가하고, 여기에 산을 가해 pH를 2.5∼4.0으로 조정하여 얻은 혼합물과; 실란계 화합물에 수용성 저급 알코올을 가하여 액상의 혼합물을 얻고, 여기에 상기에서 얻은 콜로이달 실리카의 산처리 수용액상의 혼합물과 혼합한 후, 교반한 후, 숙성하여 실란 화합물을 산가수분해시켜 실라카상의 올리고머 또는 폴리머로 전환시켜 제조한 졸상의 마감용 코팅 조성물을 도포함으로서 상도층을 형성하면 종래의 결점을 해결할 수 있음을 발견하고, 본 발명을 완성하게 되었다.As a result of earnest research to improve the above problems, the present inventors use a back cement having less iron as a binder than Portland cement, and use scrap iron slag, silica sand and calcium carbonate as fillers to compensate for water resistance. It prevents cracking due to thickening of the film thickness, increases long-term bonding strength, and improves physical bonding strength and flexibility by blending re-emulsifying resin powder. All of these components are inorganic components except for the reemulsifying resin powder. The re-emulsified resin powder is blended in small amounts so as to bind only these inorganic components, and the coating film formed of this composition maintains breathability through constructs such as internal concrete and fine pores, and also after base coating with such a composition, Separately, water is added to the colloidal silica on top, and acid is added to A mixture obtained by adjusting to 2.5 to 4.0; A water-soluble lower alcohol was added to the silane compound to obtain a liquid mixture. The mixture was mixed with the mixture of the acid-treated aqueous solution of colloidal silica obtained above, stirred, and then aged to age and hydrolyzed the silane compound. Forming a top coat layer with a sol-like finish coating composition prepared by converting it into an oligomer or a polymer was found to solve the conventional drawbacks, thus completing the present invention.

즉, 본 발명은 백시멘트, 규사, 고로 슬랙, 탄산칼슘, 재유화형 수지, 증점제, 소포제, 셀루로오즈 유도체로 이루어진 베이스 코팅 조성물에 적용하기 위한 무기 실란계 화합물로 이루어진 마감용 코팅(top coating) 조성물의 제조방법을 제공하는 것이다.That is, the present invention is a top coating made of an inorganic silane-based compound for application to a base coating composition consisting of white cement, silica sand, blast furnace slag, calcium carbonate, reemulsifying resin, thickener, antifoaming agent, cellulose derivative. It is to provide a method for preparing the composition.

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

본 발명에서는 무기 결합제로서 일반 포틀랜드 시멘트에 비하여 철분 및 망간성분이 극히 적은 백시멘트를 사용함으로서 도장 공사시에 도장재에 번거롭게 물이나 용제 등의 점도조정제를 가할 필요가 없어 수밀성이나 내구성을 유지할 수 있고, 더욱이 백색이므로 각종 색상이나 모양을 만들기 쉽고, 미려한 외장을 형성할 수 있다. 이러한 백시멘트의 양은 도포제 조성물에 대하여 5∼35중량부가 바람직하다. 5중량부 이하를 사용하는 경우, 조성물의 결합력이 떨어지고, 장기 내수성이 저하하여 조성물로서 성능을 발휘할 수 없고, 또한, 35중량부를 초과하는 경우, 백화현상이 현상의 발생이 심하게 되어 바람직하지 못하다.In the present invention, by using a back cement having an extremely small amount of iron and manganese components as compared to general portland cement, it is not necessary to add a viscosity adjusting agent such as water or a solvent to the coating material during painting work, thereby maintaining watertightness and durability. Moreover, the white color makes it easy to make various colors and shapes, and to form a beautiful exterior. The amount of such back cement is preferably 5 to 35 parts by weight based on the coating composition. In the case where 5 parts by weight or less is used, the bonding strength of the composition is lowered, the long-term water resistance is lowered, so that the performance can not be exhibited as the composition, and when it is more than 35 parts by weight, the occurrence of whitening phenomenon becomes severe, which is not preferable.

본 발명의 마감제 코팅 조성물을 적용하기 위한 베이스 코팅 조성물중, 무기질 충진제로서는 주성분이 SiO2인 규사로서 입경이 0.2 mm이하인 것을 배합하여 시멘트 수화반응시 발생하는 수산화칼슘과 결합하는 반응을 유도하여 표면강도가 향상되도록 하며, 또한 필러로서 작용한다. 그의 배합량은 5∼35중량부가 바람직하다. 탄산칼슘은 필러로서 작용하고, 또한 시멘트의 수경반응시 발생하는 칼슘실리케이트 등과 반응하여 무기 결합제의 접합을 보조하는 것으로 생각된다. 그의 배합량은 20∼50중량부가 바람직하며, 20중량부이하에서는 필러로서의 작용이 약하여 바람직하지 못하고, 50중량부를 초과하면 조성물중의 필러의 양이 지나치게 많게 되어 조성물 전체의 결합력이 저하될 우려가 있다. 또한, 슬랙은 실리카 및 산화칼슘이 주성분이 제철 슬랙으로서 잠재 수경성을 나타내며, 규사와 혼합성이 우수하고, 경화 속도를 조절하는 역활을 한다. 그의 배합량은 5∼35중량부가 바람직하다. 5중량부 이하에서는 장기적인 결합력이 저하하고, 또한 35중량부이상에서는 경화속도가 지나치게 저하하여 바람직하지 못하다.In the base coating composition for applying the finish coating composition of the present invention, the inorganic filler is a silica sand whose main component is SiO 2 , blended with a particle diameter of 0.2 mm or less to induce a reaction that combines with calcium hydroxide generated during the cement hydration reaction to the surface strength To improve, and also acts as a filler. As for the compounding quantity, 5-35 weight part is preferable. Calcium carbonate acts as a filler and is thought to assist the bonding of the inorganic binder by reacting with calcium silicate or the like generated during hydroponics of the cement. The blending amount thereof is preferably 20 to 50 parts by weight, and less than 20 parts by weight, the action as a filler is weak, which is not preferable. When the amount is more than 50 parts by weight, the amount of the filler in the composition may be too large, resulting in a decrease in the bonding strength of the entire composition. . In addition, the slack is a silica and calcium oxide, the main component of the steelmaking slack, the latent hydraulic properties, silica sand and excellent mixing, and plays a role of controlling the curing rate. As for the compounding quantity, 5-35 weight part is preferable. If it is 5 parts by weight or less, the long-term bond strength is lowered, and if it is 35 parts by weight or more, the curing rate is too low, which is not preferable.

또한, 물리적인 결합력을 향상시키기 위하여 재유화형 수지분말을 배합하여 도막의 유연성과 접착력을 보완하였다. 재유화형 수지로서는 비닐아세테이트/아크릴레이트 공중합체, 스티렌/아크릴레이트 공중합체, 비닐아세테이트/비닐 에스테르 공중합체, 비닐아세테이트/VeoVa/아크릴산 에스테르 터폴리머 등을 들 수 있으며, 이들의 입경은 30∼100㎛, pH는 9∼12 정도인 것이 바람직하다. 그의 구체적인 상품으로서는 DM-200P(상품명, 독일 훽스트사), DM-1140P, DM-2072P, DA-1200, DA-1210, DA-1400, DA-1410, LL-512, LL-512, RI-538, 5I-551Z, RI-554Z, RE-547, DP-2904, ELOTEX-511/44E, ELOTEX-50E100S, ELOTEX-50V/920, ELOTEX WS-73 등을 들 수 있다. 이 재유화형 분말수지의 배합량은 3∼25중량부가 바람직하다. 3중량부 이하에서는 결합력이 감소하고, 내수성이 저하되며, 25중량부이상에서는 잔갈림 발생이 심하고, 작업성이 저하한다.In addition, re-emulsifying resin powder was formulated to improve the physical bonding strength to complement the flexibility and adhesion of the coating film. Examples of reemulsifying resins include vinyl acetate / acrylate copolymers, styrene / acrylate copolymers, vinyl acetate / vinyl ester copolymers, vinyl acetate / VeoVa / acrylic acid ester terpolymers, and their particle diameters range from 30 to 100 μm. It is preferable that pH is about 9-12. Specific products thereof include DM-200P (trade name, German company Zustst), DM-1140P, DM-2072P, DA-1200, DA-1210, DA-1400, DA-1410, LL-512, LL-512 and RI-538. , 5I-551Z, RI-554Z, RE-547, DP-2904, ELOTEX-511 / 44E, ELOTEX-50E100S, ELOTEX-50V / 920, and ELOTEX WS-73. As for the compounding quantity of this reemulsification type | mold resin, 3-25 weight part is preferable. At 3 parts by weight or less, the bonding force decreases, and water resistance is lowered. At 25 parts by weight or more, the occurrence of cracking is severe and workability is reduced.

상기 성분이외에 증점제와 소포제를 소량 첨가하여도 좋다. 증점제로서는 알킬셀루로오즈, 특히 메틸셀루로오즈가 바람직하며, 그의 배합량은 0.05∼0.3중량부이다. 0.05중량부이하에서는 조성물이 흘러내려 작업성이 나쁘며, 0.3중량부이상에서는 조성물의 점도가 높아져 흙손 작업성 등이 저하하여 바람직하지 않다.In addition to the above components, a small amount of a thickener and an antifoaming agent may be added. As a thickener, alkyl cellulose, especially methyl cellulose is preferable, and the compounding quantity is 0.05-0.3 weight part. At 0.05 parts by weight or less, the composition flows down, resulting in poor workability. At 0.3 parts by weight or more, the viscosity of the composition is increased, and trowel workability is lowered, which is not preferable.

또한, 상기 베이스 코팅 조성물에 소포제를 첨가하여 조성물중에 발생하는 기포를 억제한다. 조성물 중에 기포가 발생하면 도포막의 물성이 급격히 저하하여 바람직하지 않다. 이러한 소포제의 예로서는 옥틸알코올, 시클로헥사놀, 에틸렌글리콜, 인산트리부틸, 실리콘 에멀젼, 2-에틸헥실알코올 등을 들 수 있으며, 소포제의 배합량은 특히 한정되는 것은 아니나, 전조성물에 대해 0.1∼0.5중량부가 바람직하다.In addition, an antifoaming agent is added to the base coating composition to suppress bubbles generated in the composition. If bubbles are generated in the composition, the physical properties of the coating film are sharply lowered, which is not preferable. Examples of such antifoaming agents include octyl alcohol, cyclohexanol, ethylene glycol, tributyl phosphate, silicone emulsion, 2-ethylhexyl alcohol, and the like. The amount of the antifoaming agent is not particularly limited, but is 0.1 to 0.5% by weight based on the precursor. Addition is preferred.

또한, 도포면의 색상을 다양한 색상으로 하기 위하여는 공지의 무기안료를 사용할 수 있으며, 이들 안료는 특히 한정되는 것은 아니나, 내알칼리성이 우수한 안료를 선택하여 사용하는 것이 바람직하다. 사용되는 안료의 양으로는, 예를 들면 0.1∼6.0 중량비까지 사용할 수 있다. 이들 양보다 지나치게 소량이면 착색도와 은폐력이 저하되고, 과량사용시 입자크기가 적기 때문에 상대적으로 물을 많이 흡수하게 되어 도막의 강도가 저하되거나 경화 시간의 지연으로 인하여 우수한 도막의 형성이 어렵다.In addition, in order to make the color of the coated surface various colors, well-known inorganic pigments can be used, and these pigments are not particularly limited, but it is preferable to select and use pigments having excellent alkali resistance. As an amount of the pigment used, it can use to 0.1-6.0 weight ratio, for example. When the amount is too small, the coloration and hiding power are lowered, and when the excessive amount is used, since the particle size is small, the amount of water is relatively absorbed and the strength of the coating film is lowered or the formation of an excellent coating film is difficult due to the delay of curing time.

상기 조성물의 성분을 배합하는 것은 특별히 한정되는 것은 아니다. 우선, 재유화형 분말수지, 백시멘트, 탄산칼슘, 규사, 고로 슬랙을 혼합기에서 혼합하여 균일하게 한 후, 이들 조성 성분에 대해 소량의 소포제, 증점제, 안료 등을 가하고, 상기 조성 성분에 대해 15∼60중량부, 바람직하기로는 20∼50중량부의 물을 가하여 사용한다. 이때 혼합수량이 적으면 고점도로 인하여 도포가 곤란하고 과량일 경우에는 강도가 저하될 수 있다. 이러한 조성물은 물을 제외한 성분을 배합한 후, 사용시에 물을 가하여 사용하거나, 또는 물을 함께 가하여 조성물을 준비하는 경우에는 통상의 안정화제를 가하여 배합할 수 있다.Mixing the components of the composition is not particularly limited. First, re-emulsifying powder resin, white cement, calcium carbonate, silica sand, blast furnace slag are mixed and homogenized in a mixer, and then a small amount of antifoaming agent, thickener, pigment, etc. is added to these components, 60 parts by weight, preferably 20 to 50 parts by weight of water is added and used. In this case, when the amount of the mixture is small, the coating may be difficult due to the high viscosity, and when the amount is excessive, the strength may be reduced. Such a composition may be formulated by adding components other than water and then adding water at the time of use, or adding a common stabilizer when preparing the composition by adding water together.

이상과 같은 조성물을 물과 일정비율을 혼합하여 도포한 후 상온에서 1∼2시간 이상 건조한 후 마감용 도포제로서 무기 실란계 도포제로 코팅하여 수분에 대한 저항성과 고도의 부착력, 색상변색이 없는 우수한 도막을 형성 할 수 있다.After applying the above composition by mixing water and a certain ratio, and drying at room temperature for 1 ~ 2 hours or more, it is coated with inorganic silane-based coating agent as finish coating agent, and is excellent coating film without moisture resistance, high adhesion and color discoloration. Can form.

본 발명의 마감용 코팅 조성물은 실란계 화합물, 콜로이달 실리카, 수용성 저급 알코올 및 물을 사용하여 제조한다. 여기서 실란계 화합물로서는 메틸 트리메톡시실란(methyl trimethoxy silane, CH3Si(OCH3)3), n-디트리메톡시실란(n-C10H21Si(OCH3)3)로 이루어진 군에서 선택된 1종이상을 들 수 있으며, 이들 성분은 마감 코팅 조성물의 콜로이달 실리카에 대하여 4∼20중량배로 배합하는 것이 바람직하다. 4중량배 미만에서는 결합력이 약하게 되고, 20중량배를 초과하면 비용이 많이 들고, 유연성이 떨어지고, 다량으로 배합된 만큼 비례하여 결합력이 증가하지 않기 때문에 바람직하지 않다.The finishing coating composition of the present invention is prepared using a silane compound, colloidal silica, water soluble lower alcohol and water. Herein, the silane compound is selected from the group consisting of methyl trimethoxy silane (CH 3 Si (OCH 3 ) 3 ) and n-ditrimethoxysilane (nC 10 H 21 Si (OCH 3 ) 3 ). A paper form is mentioned, It is preferable to mix these components at 4-20 weight times with respect to the colloidal silica of a finishing coating composition. If it is less than 4 weight times, the binding force becomes weak, and if it exceeds 20 weight times, it is unpreferable since it is costly, flexibility falls, and binding force does not increase proportionally as it is mix | blended in large quantities.

콜로이달 실리카는 시판의 것을 사용할 수 있다.Colloidal silica can use a commercially available thing.

수용성 알코올로서는 메탄올, 에탄올, 프로판올, 이소프로판올 등을 들 수 있으나, 이소프로필 알코올과 메탄올이 바람직하다. 이들 알코올의 함량은 특별히 한정되지 않으며, 교반, 혼합이 용이하게 하기 위하여 실란계 화합물과 콜로이달 실리카를 합한 양의 2∼8배량으로 배합하여 조제하는 것이 바람직하다.Examples of the water-soluble alcohol include methanol, ethanol, propanol, isopropanol, and the like, and isopropyl alcohol and methanol are preferable. The content of these alcohols is not particularly limited, and in order to facilitate stirring and mixing, it is preferable to mix and prepare the silane compound and colloidal silica in 2 to 8 times the combined amount.

본 발명의 조성물의 제조방법에서, pH의 조정은 2.5∼4.0인 것이 바람직하다. pH조정제로서는 질산, 아세트산이 바람직하다. 이와 같이 질산이나 아세트산으로 pH를 상기 범위로 조정하는 것은 실란 화합물, 즉, 메틸 트리메톡시실란(methyl trimethoxy silane, CH3Si(OCH3)3), n-디트리메톡시실란과 산과 반응하여 가수분해를 일으킴으로서 실란에 결합되어 있던 메틸기나 메톡시기가 분리되고, 규소 및 이산화규소만으로 강한 결합을 형성하게 되고, 떨어진 메틸기나 메톡시기는 메틸알코올 등으로 형성되어 발산되어 버린다.In the manufacturing method of the composition of this invention, it is preferable that adjustment of pH is 2.5-4.0. As the pH adjuster, nitric acid and acetic acid are preferable. Thus, adjusting the pH to the above range with nitric acid or acetic acid reacts with a silane compound, that is, methyl trimethoxysilane (CH 3 Si (OCH 3 ) 3 ), n-ditrimethoxysilane and acid. By causing hydrolysis, the methyl group and methoxy group bonded to the silane are separated, and a strong bond is formed only by silicon and silicon dioxide, and the separated methyl group and methoxy group are formed by methyl alcohol or the like and diverge.

마감용 조성물을 제조하기 위하여는 우선 이소프로필 알코올과 메탄올과 같은 수용성 저급알코올을 사용하여 배합한다. 이들 알코올은 도막후에 용이하게 발산되므로 조성물의 점성이나 기타 물성을 저해하지 않는다. 이러한 알코올 용매에 메틸 트리메톡시 실란을 가한 후, 교반하여 균일하게 한 후, n-디트리메톡시 실란을 가하고, 교반한다. 메틸 트리메톡시 실란과 n-디트리메톡시 실란의 배합순서를 바꾸어도 지장이 없으며, 함께 투입하여 조제하는 것도 가능하나, 독립적으로 투입하여 배합하는 것이 바람직하다. 또한, 이들 양자중 1종만을 사용하여도 제조할 수 있다.In order to prepare the finishing composition, it is first compounded using a water-soluble lower alcohol such as isopropyl alcohol and methanol. These alcohols are easily released after coating, and do not impair the viscosity or other physical properties of the composition. Methyl trimethoxy silane is added to this alcohol solvent, after stirring and homogeneous, n-ditrimethoxy silane is added and stirred. It is possible to change the compounding order of methyl trimethoxy silane and n-ditrimethoxy silane, and it is also possible to add and prepare together, but it is preferable to add and mix independently. Moreover, even if only one of these is used, it can manufacture.

한편, 별도로 콜로이달 실리카를 물에 넣어 교반하여 균일하게 현탁시키고, 여기에 산을 가하여 pH를 2.5∼4.0으로 조정한다. 이 때, 물의 양은 마감제 코팅 조성물 전량에 대하여 10∼25중량％가 되도록 배합하는 것이 교반, 혼합하는 데 편리하다.On the other hand, colloidal silica is separately added to water, stirred and uniformly suspended, and acid is added thereto to adjust the pH to 2.5 to 4.0. At this time, it is convenient to mix | blend and mix so that the quantity of water may be 10-25 weight% with respect to the finishing agent coating composition whole quantity.

이 콜로이달 현탁액에 상기에서 조제한 실란계 화합물이 함유된 조성물을 가하고, 약 2∼4시간 교반하여 숙성하여 사용한다.A composition containing the silane compound prepared above is added to this colloidal suspension, and it is stirred and used for about 2 to 4 hours.

이러한 조성물에는 필요에 따라, 안료, 통상의 안정화제를 첨가할 수 있다.Pigments and usual stabilizers can be added to these compositions as needed.

이 마감용 코팅 조성물은 상기 베이스 코팅 조성물의 도막층위에 코팅하는 데 사용하는 것이 유리하나, 필요에 따라, 이 조성물만을 독립적으로 구조물, 타일 등에 시행하여 도막층을 형성하여도 좋다.This finishing coating composition is advantageously used to coat the coating layer of the base coating composition, but if necessary, the coating layer may be formed by independently applying the composition to a structure, a tile, or the like.

[실시예]EXAMPLE

이하, 실시예를 들어 본 발명을 더욱 구체적으로 설명한다. 그러나, 본 발명의 범위가 이들 실시예에 한정되는 것은 아니다.Hereinafter, an Example is given and this invention is demonstrated further more concretely. However, the scope of the present invention is not limited to these Examples.

실시예 1 (베이스 코팅 조성물 1)Example 1 (base coating composition 1)

재유화형 분말수지인 훽스트사의 DM-200P 13중량부, 백시멘트(유니온 사) 20중량부 탄산칼슘 35, 규사 20중량부, 고로 슬랙(제철 세라믹사) 12중량부를 혼합기에 넣고, 균일하게 혼합하였다.13 parts by weight of Huxest's DM-200P, a re-emulsified powder resin, 20 parts by weight of back cement (Union), 35 parts of calcium carbonate, 20 parts by weight of silica sand, and 12 parts by weight of blast furnace slag (steel ceramics) were placed in a mixer and mixed uniformly. .

이 조성물 100중량부에 대해 2-에틸헥실알코올 0.3중량부, 셀루로오즈(Dow228) 0.15 중량부 및 적색 안료 0.2 중량부를 가하고, 물 35중량부를 가하고, 약 500 rpm으로 균일하게 혼합하여 베이스 코팅 조성물을 조제하였다.0.3 parts by weight of 2-ethylhexyl alcohol, 0.15 parts by weight of cellulose (Dow228) and 0.2 parts by weight of red pigment were added to 100 parts by weight of the composition, 35 parts by weight of water was added, and the base coating composition was uniformly mixed at about 500 rpm. Was prepared.

이 조성물을 사용하여 한국 건자재 시험연구원에 시험 의뢰하여 KS F4715-'97 시험을 검사한 바, 내충격성, 가요성 시험에 이상이 없고, 또한, 타일과의 접착강도가 8.5 kgf/㎠, 몰타르와의 접착강도가 21.6 kgf/㎠이었다.Using this composition, the KS F4715-'97 test was tested by the Korea Institute of Construction Materials, and there was no abnormality in impact resistance and flexibility test, and the adhesive strength with the tile was 8.5 kgf / ㎠, The adhesive strength of was 21.6 kgf / cm 2.

실시예 2 (마감 코팅 조성물 1)Example 2 (Finish Coating Composition 1)

이소프로필 알코올 34중량부와 메탄올 30중량부를 혼합하고, 400 rpm에서 5분간 교반한 후, 여기에 메틸트리메톡시실란 18중량부를 가하고, 700rpm에서 10분간 교반하고, n-디트리메톡시실란 2중량부를 가하고, 700rpm에서 10분간 교반하였다.34 parts by weight of isopropyl alcohol and 30 parts by weight of methanol were mixed and stirred at 400 rpm for 5 minutes, and then 18 parts by weight of methyltrimethoxysilane was added thereto, stirred at 700 rpm for 10 minutes, and n-ditrimethoxysilane 2 Part by weight was added and stirred at 700 rpm for 10 minutes.

한편, 별도로 콜로이달 실리카 2중량부를 물 10중량부에 넣고 800 rpm에서 10분간 교반하여 현탁액을 얻은 후, 질산을 소량 가해 pH 2.5로 하였다. 여기에 상기에서 얻은 조성물을 가하고 1200rpm에서 2시간 교반한 후, 24시간 숙성시킨 후, 사용하였다.Meanwhile, 2 parts by weight of colloidal silica was separately added to 10 parts by weight of water, and stirred at 800 rpm for 10 minutes to obtain a suspension, and then a small amount of nitric acid was added to pH 2.5. The composition obtained above was added thereto, stirred at 1200 rpm for 2 hours, aged for 24 hours, and then used.

시험예 1Test Example 1

상기 실시예 1에서 얻은 조성물을 석면 시멘트판(6 mm에 1mm 두께로 바르고, 상기 실시예 2에서 얻은 조성물로 2회 도포하였다.The composition obtained in Example 1 was applied to an asbestos cement board (6 mm in thickness of 1 mm) and applied twice with the composition obtained in Example 2.

그 결과, 난연성의 표면시험에서 용융, 균열, 잔염이 없었으며, 발연계수(CA)는 1.2이었고, 온도시간면적은 3분 이내 및 이후에 0℃·min이었고, 기재시험에서 혼도차는 +30℃정도이었다. (이 결과는 한국 건자재 시험연구원에 수행한 것이다.)As a result, there was no melting, cracking or residual flame in the surface test of flame retardancy, the coefficient of smoke (C A ) was 1.2, the temperature time area was within 0min after 3 minutes, and the mixing difference was +30 in the substrate test. It was about degreeC. (This result was performed by the Korea Institute of Construction Materials.)

실시예 3∼6Examples 3-6

하기 표 1에 기재된 함량으로 상기 실시예 1과 동일하게 실시하고, 그 결과를 하기 표 2에 나타낸다. In the same manner as in Example 1, the content shown in Table 1 below, the results are shown in Table 2 below.

전술한 바와 같이, 베이스 코팅 조성물은 백시멘트, 재유화형 분말수지, 고로 슬랙, 탄산칼슘, 규사로 이루어져 있으므로 결합성이 우수하고, 또한 결합 재유화 분말수지를 제외하는 모두 무기성분이고, 또한 마감 코팅 조성물도 모두 무기성분으로 구성되어 있으므로, 수분 침입에 의한 백화현상, 표면 박리 등의 문제점이 발생하지 않고, 도막의 두께를 후막화하여도 어떠한 문제도 발생하지 않는다. 또한, 필요에 따라 구조물, 타일 등에 마감 코팅 조성물만으로 코팅하여도 우수한 결합성 등을 갖는 도막을 형성할 수 있다.As described above, the base coating composition is composed of the back cement, re-emulsified powder resin, blast furnace slag, calcium carbonate, silica sand, has excellent bonding properties, and all inorganic components except the binder re-emulsified powder resin, and also finish coating Since the compositions are all composed of inorganic components, problems such as whitening and surface peeling due to moisture invasion do not occur, and no problems arise even when the thickness of the coating film is thickened. In addition, a coating film having excellent bonding properties and the like may be formed by coating only a finish coating composition on a structure, tile, or the like as needed.

Claims (11)

백시멘트 5∼35중량부; 탄산칼슘 20∼50중량부, 규사 5∼35중량부 및 고로 슬랙 5∼35중량부으로 이루어진 필러; 재유화형 분말 수지 3∼25중량부; 증점제 0.05∼0.3중량부; 및 소포제 0.1∼0.5 중량부로 이루어진 분말형 무기계 베이스 코팅 조성물을 조제하고, 여기에 물을 가하여 수화반응을 일으켜 얻어지는 슬러리상의 조성물에 적용시키기 위하여,5 to 35 parts by weight of back cement; Filler consisting of 20 to 50 parts by weight of calcium carbonate, 5 to 35 parts by weight of silica sand and 5 to 35 parts by weight of blast furnace slag; 3 to 25 parts by weight of reemulsifying powder resin; 0.05 to 0.3 parts by weight of a thickener; And to prepare a powder-based inorganic base coating composition consisting of 0.1 to 0.5 parts by weight of an antifoaming agent, and to apply it to a slurry-like composition obtained by adding water thereto to cause a hydration reaction, 콜로이달 실리카에 대하여 10∼25중량배의 물을 가하고 교반하여 혼합액을 제조한 후, 산을 가하여 그의 pH가 2.5∼4.0로 조정하고,10-25 weight times of water was added to the colloidal silica, and it stirred, and prepared the liquid mixture, and added the acid, and adjusted the pH to 2.5-4.0, 이와 별도로 메틸 트리메톡시실란 또는 n-디트리메톡시실란으로부터 선택된 실란계 화합물을 2∼8배량의 수용성 저급 알코올에 가하고, 교반하여 균일한 혼합물을 얻은 후,Separately, a silane compound selected from methyl trimethoxysilane or n-ditrimethoxysilane is added to 2 to 8 times the amount of water-soluble lower alcohol, and stirred to obtain a uniform mixture. 상기 콜로이달 실리카 혼합액과 상기 실란 화합물의 저급 알코올 혼합물을 약 1:9∼2:8의 중량비로 혼합하고, 교반한 후, 숙성하여 상기 실란계 화합물을 무기계의 실리카상의 올리고머 또는 폴리머로 전환시킴을 특징으로 하는 졸상의 마감제 코팅 조성물의 제조방법.The colloidal silica mixture and the lower alcohol mixture of the silane compound are mixed in a weight ratio of about 1: 9 to 2: 8, stirred, and aged to convert the silane compound into an oligomer or polymer on inorganic silica. A process for producing a sol-like finish coating composition. 삭제delete 삭제delete 삭제delete 삭제delete 삭제delete 삭제delete 삭제delete 삭제delete 삭제delete 삭제delete
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