KR101316603B1 - Water paint containing zink powder for protecting metal corrosion - Google Patents

Water paint containing zink powder for protecting metal corrosion Download PDF

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KR101316603B1
KR101316603B1 KR1020070078852A KR20070078852A KR101316603B1 KR 101316603 B1 KR101316603 B1 KR 101316603B1 KR 1020070078852 A KR1020070078852 A KR 1020070078852A KR 20070078852 A KR20070078852 A KR 20070078852A KR 101316603 B1 KR101316603 B1 KR 101316603B1
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zinc
weight
potassium silicate
coating
water
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KR1020070078852A
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KR20090014705A (en
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송요석
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최원섭
최원석
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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
    • C09D5/08—Anti-corrosive paints
    • C09D5/10—Anti-corrosive paints containing metal dust
    • C09D5/106—Anti-corrosive paints containing metal dust containing Zn
    • 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
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/54—Silicon-containing compounds
    • C08K5/541—Silicon-containing compounds containing oxygen
    • C08K5/5415—Silicon-containing compounds containing oxygen containing at least one Si—O bond
    • C08K5/5419—Silicon-containing compounds containing oxygen containing at least one Si—O bond containing at least one Si—C bond
    • 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
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/66—Additives characterised by particle size
    • C09D7/69—Particle size larger than 1000 nm

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Inorganic Chemistry (AREA)
  • Nanotechnology (AREA)
  • Paints Or Removers (AREA)

Abstract

본 발명은, 아연분말과 규산칼륨을 혼합한 금속 방부식용 수성 아연도료에 관한 것이다.The present invention relates to a metal anticorrosive aqueous zinc coating containing a zinc powder and potassium silicate.

본 발명의 수성 아연도료는, 아연분말 50∼80중량％, 규산칼륨 10∼30중량％, 보조제 1∼5중량％ 및 물 5∼20중량％ 로 조성되며, 아연분말은 금속 아연의 함량이 95중량％ 이상인 동시에 입도가 20㎛ 이하인 것을 사용하며, 규산칼륨은 K2O에 대한 SiO2의 몰 비가 2∼4 인 것을 사용하고, 보조제로서 헥사메틸 디실록산을 사용함에 그 특징이 있다.The aqueous zinc coating of the present invention is composed of 50 to 80% by weight of zinc powder, 10 to 30% by weight of potassium silicate, 1 to 5% by weight of auxiliaries and 5 to 20% by weight of water. It is characterized by using hexamethyl disiloxane as an auxiliary agent by using one having a weight% or more and a particle size of 20 µm or less, and a potassium silicate having a molar ratio of SiO 2 to K 2 O of 2 to 4, and an adjuvant.

본 발명의 금속 방부식용 수성 아연도료는, 제조공정이 간단하여 제조원가가 절감되면서도 도막 성능이 우수한 장점이 있다. The metal anticorrosive aqueous zinc coating of the present invention has an advantage of excellent coating performance while reducing the manufacturing cost due to the simple manufacturing process.

접착제, 아연분말, 도료, 규산칼륨 Adhesive, Zinc Powder, Paint, Potassium Silicate

Description

금속 방부식용 수성 아연도료{Water paint containing zink powder for protecting metal corrosion}Water paint containing zink powder for protecting metal corrosion}

본 발명은, K2O에 대한 SiO2의 몰 비가 2∼4 인 규소칼륨, 아연분말, 물 및 보조제를 혼합하여 도료로서의 도막 성능과 접착제로서의 안정성을 확보할 수 있도록 한, 금속 방부식용 수성 아연도료에 관한 것이다.The present invention provides an aqueous zinc anticorrosive zinc, in which a silicon dioxide, zinc powder, water, and an auxiliary agent having a molar ratio of SiO 2 to K 2 O is mixed to ensure coating performance as a paint and stability as an adhesive. It is about paint.

여러 종류의 금속들 중에서 양적으로 가장 널리 사용되고 있는 금속은 철강으로서, 철강은 우수한 가공성과 적절한 강성 등을 가지고 있으면서 상대적으로 가장 저렴한 금속인 바, 철강이 사용되지 않는 산업분야는 없다고 할 수 있을 정도이다.Among the various types of metals, the most widely used metal is steel. Steel is a relatively inexpensive metal having excellent workability and adequate rigidity, and there is no industrial field where steel is not used. .

상기와 같은 철강은, 기계적성질에 있어서 가격대비 매우 우수한 재료이나 내식성이 약한 것이 강 큰 약점으로서, 철강의 표면이 외부로 노출되는 경우에는 그대로 사용할 수 없는 단점이 있는 바, 철강의 표면에 아연도금층이나 주석도금층 등을 피복하거나, 도료층을 형성시킨 상태로 사용되는 것이 일반적이다.As described above, the steel is a material that has a very good value for money in terms of mechanical properties, but is poor in corrosion resistance. The steel has a disadvantage in that it cannot be used as it is when the surface of the steel is exposed to the outside. It is common to use it, covering the tin plating layer, etc., or forming the coating layer.

그러나, 크기가 큰 철강 구조물의 경우에는 도금을 실시할 수 없기 때문에 도장을 실시하는 것이 일반적인데, 도장에 사용되는 도료의 경우, 일반 도료보다는 아연이 혼합됨으로써 아연의 희생부식에 의해 더욱 효과적으로 철강을 보호할 수 있는 아연계 도료가 바람직한 바, 이를 살펴보면 다음과 같다.However, in the case of a large steel structure, it is common to apply the coating because it cannot be plated. In the case of the paint used for coating, the zinc is mixed rather than the general paint, so that the steel is more effectively affected by the sacrificial corrosion of zinc. Zinc-based paint that can protect is preferred, look at this as follows.

철강의 방부식용 도료로 사용되고 있는 아연계 도료는 크게 두 가지 종류가 있는데, 그 하나는, 수용성 유기 접착제와 극세(超細) 아연분말로 조성된 것으로, 이러한 도료에는 대량의 유기 성분이 함유되어 있기 때문에 환경을 오염시킬 뿐만 아니라, 보관, 운송 및 사용 중에 발생할 수 있는 안전성의 문제가 있어 그 사용이 제한을 받고 있다.There are two main types of zinc paints used as anticorrosive paints for steel, one consisting of a water-soluble organic adhesive and an ultrafine zinc powder. These paints contain a large amount of organic components. This not only contaminates the environment, but also restricts its use due to safety issues that can occur during storage, transportation and use.

그리고, 다른 하나는, 수용성 무기 접착제와 아연분말로 조성되었는데, 수용성 무기 접착제를 기초로 한 아연계 도료는 내후성과 부착력이 약하기 때문에 도막이 쉽게 갈라지는 등의 문제점이 있다.The other is composed of a water-soluble inorganic adhesive and a zinc powder, but the zinc-based paint based on the water-soluble inorganic adhesive has a problem such that the coating film is easily cracked because of poor weatherability and adhesion.

그러나, 안전성의 문제가 거의 없는 수용성 아연계 도료의 경우, 부착력이 약한 단점을 해결하기 위하여 수용성 무기 접착제로서 수용액상의 규산칼륨이 첨가되는데, 규산칼륨은, SiO2와 와 K2CO3를 고열에서 함께 용융시켜 제조되는 수용액으로서, 일반적인 화학식은 KOㆍnSiOㆍmHO로 표현되며(n은 K2O에 대한 SiO2의 몰 비), n=1의 메타규산칼륨에는 무수물, 0.5 또는 1 수염도 있으나, 현재 공업용으로 생산되고 있는 것은 주로 몰 비가 2∼4 범위이다.However, in the case of water-soluble zinc paint, which has almost no safety problem, in order to solve the disadvantage of weak adhesion, potassium silicate in aqueous solution is added as a water-soluble inorganic adhesive, and potassium silicate is used to heat SiO 2 and K 2 CO 3 at high temperatures. As an aqueous solution prepared by melting together, a general chemical formula is represented by KO.nSiO.mHO (n is the molar ratio of SiO 2 to K 2 O). Potassium metasilicate of n = 1 also has anhydrides, 0.5 or 1 beard. Currently, industrial production is mainly in the molar ratio of 2-4.

상기와 같은 규산칼륨은, 규산나트륨과 함께 널리 사용되며 물에는 잘 용해되나 알코올에는 녹지 않는 수용성 무기화합물로서 높은 접착성을 가지고 있는데, 이를 수용성 아연계 도료에 첨가하는 경우 규산칼륨의 몰 비를 4 이상으로 높여주어야 하는 문제가 있다.Potassium silicate as described above is widely used together with sodium silicate and has high adhesion as a water-soluble inorganic compound that is well soluble in water but insoluble in alcohol, and when added to a water-soluble zinc paint, the molar ratio of potassium silicate is 4 There is a problem that must be raised above.

그러나, 몰 비가 4 이상인 규산칼륨을 직접 제조하는 데는 어려움이 있는 바, 근래에는 일정한 조건 하에서 실리카졸(silica sol)을 별도로 첨가하는 방법이 사용되고 있는데, 그 결과, 도료의 제조공정이 복잡해질 뿐 아니라, 단가도 높아지게 된다.However, it is difficult to directly prepare potassium silicate having a molar ratio of 4 or more. Recently, a method of separately adding silica sol under constant conditions is used. As a result, the manufacturing process of the paint is not only complicated. In addition, the unit price will increase.

본 발명은, 철강의 방부식을 위하여 철강 표면에 피복되는 아연계 수성도료가 가지고 있는 문제점을 해결하기 위하여 창안된 것으로, K2O에 대한 SiO2의 몰 비율이 4 이하인 규산칼륨을 사용할 수 있도록 함으로써 제조비용이 절감되도록 하는 동시에, 철강에 우수한 방부식성을 부여할 수 있는 금속 방부식용 수성 아연도료를 제공함에 본 발명의 목적이 있다.The present invention was devised to solve the problem of the zinc-based water-based coatings coated on the steel surface for corrosion protection of the steel, so that potassium silicate having a molar ratio of SiO 2 to K 2 O of 4 or less can be used. It is an object of the present invention to provide a metal anticorrosive aqueous zinc coating that can reduce the manufacturing cost and at the same time impart excellent corrosion protection to steel.

본 발명의 상기 목적은, 헥사메틸 디실록산(hexamethyl disiloxane)에 의하여 달성된다.The above object of the present invention is achieved by hexamethyl disiloxane.

이상에서 살펴본 바와 같이, 본 발명의 금속 방부식용 수성 아연도료는, 규산칼륨의 몰 비를 2∼4로 유지하기 때문에 제조공정이 간단하여 제조원가가 절감되면서도 도막 성능이 우수한 장점이 있다.As described above, since the metal anticorrosive aqueous zinc paint of the present invention maintains the molar ratio of potassium silicate at 2 to 4, the manufacturing process is simple and the manufacturing cost is reduced, but the coating film performance is excellent.

본 발명의 금속 방부식용 수성 아연도료는, 아연분말 50∼80중량％, 규산칼 륨 10∼30중량％, 보조제 1∼5중량％ 및 물 5∼20중량％ 으로 조성된다.The aqueous zinc coating for anticorrosive metal of the present invention is composed of 50 to 80% by weight of zinc powder, 10 to 30% by weight of calcium silicate, 1 to 5% by weight of auxiliaries and 5 to 20% by weight of water.

이때, 상기 아연분말은, 금속 아연의 함량이 95중량％ 이상되는 것을 사용하여야 하며, 아연분말의 입도는 20㎛ 이하, 더욱 바람직하게는 10㎛ 이하가 좋다.In this case, the zinc powder, the metal zinc content of 95% by weight or more should be used, the particle size of the zinc powder is 20㎛ or less, more preferably 10㎛ or less.

그리고, 상기와 같은 조성의 본 발명 수성 아연도료는, 규산칼륨과 보조제를 첨가함에 특징이 있는 바, 본 발명에 사용되는 액상의 규산칼륨은 K2O에 대한 SiO2의 몰 비가 2∼4 이며, 보조제로서는, 예를 들어, 헥사메틸 디실록산(hexamethyl disiloxane)이 사용된다.In addition, the aqueous zinc coating of the present invention having the composition as described above is characterized by adding potassium silicate and an auxiliary agent. The liquid potassium silicate used in the present invention has a molar ratio of SiO 2 to K 2 O of 2 to 4; As an adjuvant, hexamethyl disiloxane is used, for example.

즉, 상기 보조제는, 몰 비가 4 이상 되는 규산칼륨을 사용하지 않고도 도료의 접착력을 향상시켜 도막에 크랙이 발생하는 것을 방지하기 위한 것으로, 별도로 실리카졸을 첨가할 필요 없이 일정한 조건 하에서 물로서 규산칼륨을 희석하여도 효과적인 금속 방부식용 아연도료를 얻을 수 있게 된다.That is, the adjuvant is to improve the adhesion of the paint without using potassium silicate having a molar ratio of 4 or more, and to prevent cracking in the coating film. Potassium silicate is used as water under constant conditions without the need to add silica sol. Dilution of the coating can provide an effective metal anticorrosive zinc coating.

상기와 같은 본 발명의 금속 방부식용 수성 아연도료가 철강 표면에 도포되면 규산칼륨이 보호막을 형성하게 되는데, 이는, 도료 중의 규산염이 아연 및 철과 각각 반응하면서 공기 중의 이산화탄소를 흡수함으로써 규소와 산소 고리(Silicon-Oxygen Linkage)로 연결되는 매우 견고한 그물형 규산아연 화합물 도막이 형성되기 때문이다.When the metal anticorrosive aqueous zinc paint of the present invention is applied to the steel surface, potassium silicate forms a protective film, which is because the silicate in the paint reacts with zinc and iron, respectively, to absorb carbon dioxide in the air, thereby reducing silicon and oxygen rings. This is because a very solid mesh zinc silicate compound coating formed by the (Silicon-Oxygen Linkage) is formed.

동시에, 도료 중의 아연분말이 전기화학적으로 양극의 역할을 함으로써 음극 즉, 철강을 보호하게 되어 철강의 표면을 장기적으로 보호할 수 있게 되는 바, 다음의 실시예를 통하여 본 발명 도료의 특성을 살펴보기로 한다.At the same time, the zinc powder in the paint acts as an anode electrochemically to protect the cathode, that is, steel, thereby protecting the surface of the steel for a long time. The characteristics of the paint of the present invention will be described through the following examples. Shall be.

실시예 1Example 1

규산칼륨 3000g과 물 1000g을 각각 50∼60℃ 범위로 가열한 상태에서 보조제 200g과 함께 혼합한 후 충분히 교반하여 접착제를 제조하고, 이 접착제와 극세 아연분말을 1:2의 비율로 혼합, 교반하여 본 발명의 금속 방부식용 수성 무기 아연도료를 제조하였다.3000 g of potassium silicate and 1000 g of water were mixed together with 200 g of an adjuvant in a state of heating at 50 to 60 ° C., respectively, and then sufficiently stirred to prepare an adhesive. The adhesive and the ultrafine zinc powder were mixed and stirred at a ratio of 1: 2. The metal anticorrosive aqueous inorganic zinc coating of the present invention was prepared.

실시예 2Example 2

규산칼륨 2000g과 물 1000g을 각각 50∼60℃ 범위로 가열한 상태에서 보조제 150g과 함께 혼합한 후 충분히 교반하여 접착제를 제조하고, 이 접착제와 극세 아연분말을 1:3.5의 비율로 혼합, 교반하여 본 발명의 금속 방부식용 수성 무기 아연도료를 제조하였다.2000 g of potassium silicate and 1000 g of water were mixed together with 150 g of an adjuvant in a state heated to 50 to 60 ° C., respectively, and then sufficiently stirred to prepare an adhesive. The adhesive and the ultrafine zinc powder were mixed and stirred at a ratio of 1: 3.5. The metal anticorrosive aqueous inorganic zinc coating of the present invention was prepared.

상기의 두 실시예를 통하여 제조된 본 발명 금속 방부식용 수성 아연도료의 특성은 다음의 표 1과 같다.The properties of the inventive metal anticorrosive aqueous zinc coating prepared through the two examples are shown in Table 1 below.

Figure 112007507238365-pat00001
Figure 112007507238365-pat00001

Claims (4)

아연분말을 함유하는 수용성 도료에 있어서, In a water-soluble paint containing a zinc powder, 아연분말 50∼80중량％, 규산칼륨 10∼30중량％, 보조제로서 헥사메틸 디실록산 1∼5중량％, 및 물 5∼20중량％으로 조성된 것을 특징으로 하는 금속 방부식용 수성 아연도료. 50 to 80% by weight of zinc powder, 10 to 30% by weight of potassium silicate, 1 to 5% by weight of hexamethyl disiloxane as an adjuvant, and 5 to 20% by weight of water. 제 1항에 있어서, 상기 아연분말은,The method of claim 1, wherein the zinc powder, 금속 아연의 함량이 95중량％ 이상이며, 입도가 20㎛ 이하인 것을 특징으로 하는 금속 방부식용 수성 아연도료.A metal anticorrosive aqueous zinc coating, wherein the content of the metal zinc is 95% by weight or more and the particle size is 20 µm or less. 삭제delete 제 1항에 있어서, 상기 규산칼륨은,The method of claim 1, wherein the potassium silicate, K2O에 대한 SiO2의 몰 비가 2∼4 인 것을 특징으로 하는 금속 방부식용 수성 아연도료.A metal anticorrosive aqueous zinc coating, characterized in that the molar ratio of SiO 2 to K 2 O is 2 to 4.
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KR20020000777A (en) * 1999-03-18 2002-01-05 추후제출 Coating composition for metal substrates
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KR20020000777A (en) * 1999-03-18 2002-01-05 추후제출 Coating composition for metal substrates
EP1179035B1 (en) * 1999-03-18 2004-06-02 Akzo Nobel Coatings International B.V. Coating composition for metal substrates
JP2004509209A (en) * 2000-09-13 2004-03-25 アクゾ　ノーベル　ナムローゼ　フェンノートシャップ Steel primer coating

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