JP4558419B2 - Cementitious substrate coating method - Google Patents
Cementitious substrate coating method Download PDFInfo
- Publication number
- JP4558419B2 JP4558419B2 JP2004257034A JP2004257034A JP4558419B2 JP 4558419 B2 JP4558419 B2 JP 4558419B2 JP 2004257034 A JP2004257034 A JP 2004257034A JP 2004257034 A JP2004257034 A JP 2004257034A JP 4558419 B2 JP4558419 B2 JP 4558419B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- paint
- coating
- weight
- resin emulsion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000576 coating method Methods 0.000 title claims description 59
- 239000000758 substrate Substances 0.000 title claims description 22
- 239000003973 paint Substances 0.000 claims description 119
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 110
- 239000011248 coating agent Substances 0.000 claims description 53
- 239000000839 emulsion Substances 0.000 claims description 53
- 239000000049 pigment Substances 0.000 claims description 44
- 239000000178 monomer Substances 0.000 claims description 42
- 229920003002 synthetic resin Polymers 0.000 claims description 39
- 239000000057 synthetic resin Substances 0.000 claims description 39
- 239000007787 solid Substances 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 30
- 229920005989 resin Polymers 0.000 claims description 27
- 239000011347 resin Substances 0.000 claims description 27
- 238000004040 coloring Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 16
- 239000002562 thickening agent Substances 0.000 claims description 16
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 12
- 239000003960 organic solvent Substances 0.000 claims description 12
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 10
- 239000011230 binding agent Substances 0.000 claims description 8
- 238000010422 painting Methods 0.000 claims description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 25
- 229910052751 metal Inorganic materials 0.000 description 15
- 239000002184 metal Substances 0.000 description 15
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- 239000002585 base Substances 0.000 description 13
- 239000003795 chemical substances by application Substances 0.000 description 12
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
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- 239000004568 cement Substances 0.000 description 6
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- 230000009477 glass transition Effects 0.000 description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000007720 emulsion polymerization reaction Methods 0.000 description 5
- 229920001296 polysiloxane Polymers 0.000 description 5
- 238000007761 roller coating Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- WAEVWDZKMBQDEJ-UHFFFAOYSA-N 2-[2-(2-methoxypropoxy)propoxy]propan-1-ol Chemical compound COC(C)COC(C)COC(C)CO WAEVWDZKMBQDEJ-UHFFFAOYSA-N 0.000 description 4
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- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
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- 239000003429 antifungal agent Substances 0.000 description 3
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- 239000004567 concrete Substances 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 125000003700 epoxy group Chemical group 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
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- 239000004570 mortar (masonry) Substances 0.000 description 3
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- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 3
- 239000000080 wetting agent Substances 0.000 description 3
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 2
- DAFHKNAQFPVRKR-UHFFFAOYSA-N (3-hydroxy-2,2,4-trimethylpentyl) 2-methylpropanoate Chemical compound CC(C)C(O)C(C)(C)COC(=O)C(C)C DAFHKNAQFPVRKR-UHFFFAOYSA-N 0.000 description 2
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- JLIDVCMBCGBIEY-UHFFFAOYSA-N 1-penten-3-one Chemical compound CCC(=O)C=C JLIDVCMBCGBIEY-UHFFFAOYSA-N 0.000 description 2
- HYZJCKYKOHLVJF-UHFFFAOYSA-N 1H-benzimidazole Chemical compound C1=CC=C2NC=NC2=C1 HYZJCKYKOHLVJF-UHFFFAOYSA-N 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 2
- SVTBMSDMJJWYQN-UHFFFAOYSA-N 2-methylpentane-2,4-diol Chemical compound CC(O)CC(C)(C)O SVTBMSDMJJWYQN-UHFFFAOYSA-N 0.000 description 2
- HGINCPLSRVDWNT-UHFFFAOYSA-N Acrolein Chemical compound C=CC=O HGINCPLSRVDWNT-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- NRCMAYZCPIVABH-UHFFFAOYSA-N Quinacridone Chemical compound N1C2=CC=CC=C2C(=O)C2=C1C=C1C(=O)C3=CC=CC=C3NC1=C2 NRCMAYZCPIVABH-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 125000003545 alkoxy group Chemical group 0.000 description 2
- 125000003368 amide group Chemical group 0.000 description 2
- 125000003277 amino group Chemical group 0.000 description 2
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 2
- 150000004056 anthraquinones Chemical class 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 125000000751 azo group Chemical group [*]N=N[*] 0.000 description 2
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 description 2
- 229920001400 block copolymer Polymers 0.000 description 2
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 2
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
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- 239000010941 cobalt Substances 0.000 description 2
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- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
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- SWXVUIWOUIDPGS-UHFFFAOYSA-N diacetone alcohol Chemical compound CC(=O)CC(C)(C)O SWXVUIWOUIDPGS-UHFFFAOYSA-N 0.000 description 2
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- 239000003822 epoxy resin Substances 0.000 description 2
- PBJZAYSKNIIHMZ-UHFFFAOYSA-N ethyl carbamate;oxirane Chemical compound C1CO1.CCOC(N)=O PBJZAYSKNIIHMZ-UHFFFAOYSA-N 0.000 description 2
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- PXZQEOJJUGGUIB-UHFFFAOYSA-N isoindolin-1-one Chemical compound C1=CC=C2C(=O)NCC2=C1 PXZQEOJJUGGUIB-UHFFFAOYSA-N 0.000 description 2
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- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 2
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Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
Description
本発明は、セメント質下地に対する水性メタリック塗料の塗装方法に関するものである。 The present invention relates to a method for applying a water-based metallic paint to a cementitious substrate.
一般にメタリック塗料は、顔料としてアルミニウム粉等の金属粉顔料を含んでおり、この金属粉顔料の作用によって独特の美観性を表出することができ、また熱線反射等の性能を発揮することもできる。ただし、金属粉顔料は、下地に対する隠ぺい性において不十分な点がある。そのため、メタリック塗料で仕上げ塗装を行う場合には、隠ぺい性を高めるために、金属粉顔料とともに着色顔料を配合する方法や、メタリック塗料とほぼ同色(共色)の下塗材を塗装しておく方法等が採用されている(特許文献1参照)。 In general, a metallic paint contains a metal powder pigment such as aluminum powder as a pigment, and can exhibit a unique aesthetic appearance by the action of the metal powder pigment, and can also exhibit performance such as heat ray reflection. . However, the metal powder pigment has an insufficient point in hiding with respect to the base. Therefore, when finishing with a metallic paint, in order to increase the concealment, a method of blending a color pigment together with a metal powder pigment, or a method of painting a primer that is almost the same color (co-color) as the metallic paint Etc. are employed (see Patent Document 1).
このうち、金属粉顔料とともに着色顔料を配合する方法では、着色顔料の配合比率を大きくすれば隠ぺい性は高まるが、一方で形成塗膜の彩度や光輝性が低下するおそれがある。これに対し、メタリック塗料と共色の下塗材層を設ける方法によれば、メタリック塗料の彩度や光輝性を保持しつつ、隠ぺい性を高めることができる。 Among these, in the method of blending the color pigment together with the metal powder pigment, the hiding property is increased if the blending ratio of the color pigment is increased, but on the other hand, there is a possibility that the saturation and glitter of the formed coating film are decreased. On the other hand, according to the method of providing an undercoat material layer that is the same color as the metallic paint, the concealment can be enhanced while maintaining the saturation and glitter of the metallic paint.
ところで、近年、塗料分野においては、環境問題、省資源、労働安全衛生等の見地より、水を媒体とする水性塗料が注目されている。上述のようなメタリック塗料やその下塗材についても、従来は芳香族炭化水素等の有機溶剤を媒体とする溶剤系塗料が主流であったが、水性塗料への切替の要望が高まりつつある。 By the way, in recent years, in the paint field, water-based paints using water as a medium have attracted attention from the viewpoints of environmental problems, resource saving, occupational safety and health, and the like. Conventionally, solvent-based paints using organic solvents such as aromatic hydrocarbons as the medium have been mainstream for the metallic paints and the undercoat materials as described above, but there is an increasing demand for switching to water-based paints.
メタリック塗料とその下塗材を水性化する場合、バインダーとしては通常、合成樹脂エマルションが使用される。しかし、合成樹脂エマルションをバインダーとする水性塗料では、溶剤系塗料に比べチクソトロピーが高くなる傾向がある。そのため、形成塗膜においてゆず肌状の微細な凹凸が生じやすい。このような凹凸は仕上り外観に影響するのは勿論であるが、塗装対象となる下地がモルタル、コンクリート等のセメント質下地である場合、下塗材において凹凸が生じると、その凹部より経時的にアルカリ成分が滲み出て、金属粉顔料の溶出や変色等を引き起こすおそれがある。 When making a metallic paint and its undercoat water-based, a synthetic resin emulsion is usually used as a binder. However, water-based paints using synthetic resin emulsions as binders tend to have thixotropy higher than solvent-based paints. Therefore, it is easy to produce the fine uneven | corrugated of the skin shape in the formed coating film. Of course, such irregularities have an effect on the finished appearance. However, when the substrate to be coated is a cementitious substrate such as mortar or concrete, if irregularities occur in the primer, the alkali is gradually removed from the recess. The component may ooze out and cause elution or discoloration of the metal powder pigment.
本発明は、以上のような問題点に鑑みなされたものであり、セメント質下地に適した水性メタリック塗料の塗装方法を得ること目的とするものである。 The present invention has been made in view of the above-described problems, and an object of the present invention is to obtain a coating method of a water-based metallic paint suitable for a cementitious substrate.
本発明者は、上記目的を達成するため鋭意検討を行なった結果、セメント質下地に対し、特定の水性着色塗料を塗装した後、水性メタリック塗料を塗装する方法に想到し、本発明を完成させるに到った。 As a result of intensive studies to achieve the above object, the present inventor has conceived a method of applying a water-based metallic paint after applying a specific water-based colored paint to a cementitious substrate, and completes the present invention. It reached.
すなわち、本発明は以下の特徴を有するものである。
1.セメント質下地に対し、水性着色塗料、水性メタリック塗料を順次塗装する塗装方法において、
前記水性着色塗料として、
(メタ)アクリル酸アルキルエステルに加え、水酸基含有重合性モノマーを含むモノマー群を共重合して得られる合成樹脂エマルション、着色顔料、水への溶解度が10g/100g以上の親水性有機溶剤及び会合性増粘剤を必須成分とし、該合成樹脂エマルションの固形分100重量部に対し該着色顔料を1〜500重量部含み、
前記水性メタリック塗料との色差△Eが20以下であり、
粘度が0.3〜3Pa・s、チクソトロピーインデックスが3.0以下である水性着色塗料を使用し、
前記水性着色塗料の単位面積当たりの固形分が30g/m2以上となるように塗装することを特徴とするセメント質基材の塗装方法。
2.前記水性着色塗料の合成樹脂エマルションが、(メタ)アクリル酸アルキルエステル、水酸基含有重合性モノマーに加え、カルボキシル基含有重合性モノマーを含むモノマー群を共重合して得られる合成樹脂エマルションであることを特徴とする1.記載のセメント質基材の塗装方法。
3.前記水性着色塗料の塗装をローラブラシを用いて行うことを特徴とする1.または2.記載のセメント質基材の塗装方法。
4.前記水性着色塗料の塗装に先立ち、セメント質下地に対し、
平均粒子径0.1μm以下の水性樹脂を結合剤とし、該水性樹脂を固形分で5〜50重量%含む水性下塗塗料を、単位面積当たりの固形分が10g/m2以上となるように塗装することを特徴とする1.から3.のいずれかに記載のセメント質基材の塗装方法。
5.前記水性下塗塗料の結合剤として、平均粒子径が異なる2種以上の水性樹脂を含むことを特徴とする1.から4.のいずれかに記載のセメント質基材の塗装方法。
That is, the present invention has the following characteristics.
1. In the painting method of painting a water-based colored paint and a water-based metallic paint sequentially on a cementitious substrate,
As the water-based colored paint,
In addition to (meth) acrylic acid alkyl ester, a synthetic resin emulsion obtained by copolymerizing a monomer group containing a hydroxyl group-containing polymerizable monomer , a coloring pigment , a hydrophilic organic solvent having a solubility in water of 10 g / 100 g or more, and associative properties A thickener as an essential component, containing 1 to 500 parts by weight of the coloring pigment with respect to 100 parts by weight of the solid content of the synthetic resin emulsion,
The color difference ΔE with the water-based metallic paint is 20 or less,
Using a water-based colored paint having a viscosity of 0.3 to 3 Pa · s and a thixotropy index of 3.0 or less,
A method for coating a cementitious substrate, wherein the coating is performed so that the solid content per unit area of the water-based colored paint is 30 g / m 2 or more.
2. The synthetic resin emulsion of the aqueous coloring paint is a synthetic resin emulsion obtained by copolymerizing a monomer group containing a carboxyl group-containing polymerizable monomer in addition to a (meth) acrylic acid alkyl ester and a hydroxyl group-containing polymerizable monomer. Features 1 The method for coating a cementitious substrate as described.
3. The water-based colored paint is applied using a roller brush. Or 2. The method for coating a cementitious substrate as described.
4). Prior to the application of the water-based colored paint,
An aqueous base coating material containing an aqueous resin having an average particle size of 0.1 μm or less as a binder and containing 5 to 50% by weight of the aqueous resin in a solid content is applied so that the solid content per unit area is 10 g / m 2 or more. It is characterized by the following. To 3. The coating method of the cementitious base material in any one of.
5). The binder for the water-based undercoating paint contains two or more water-based resins having different average particle diameters. To 4. The coating method of the cementitious base material in any one of.
本発明では、セメント質下地に対し、特定の水性着色塗料及び水性メタリック塗料を順次塗装することにより、セメント質下地からのアルカリ成分の滲出に起因するメタリック塗膜の色むら発生等を抑制することができる。
水性着色塗料の塗装に先立ち下塗塗料を塗装すれば、水性着色塗料との相乗効果により、セメント質下地からのアルカリ成分の滲出をより確実に抑制することができる。
In the present invention, a specific water-colored paint and a water-based metallic paint are sequentially applied to the cementitious base, thereby suppressing the occurrence of uneven color in the metallic coating resulting from the leaching of the alkaline component from the cementitious base. Can do.
If the primer coating is applied prior to the application of the water-based colored paint, the exudation of the alkaline component from the cementitious substrate can be more reliably suppressed due to the synergistic effect with the water-based colored paint.
以下、本発明を実施するための最良の形態について説明する。 Hereinafter, the best mode for carrying out the present invention will be described.
本発明は、セメント質下地を塗装対象とするものである。かかるセメント質下地は、セメントを必須成分として得られる材料である。セメント以外の成分として、例えば、珪砂、珪石、フライアッシュ等の骨材、パルプ、ガラスウール等の繊維類等が含まれていてもよい。
具体的に、セメント質下地としては、例えば、コンクリート、モルタル、繊維混入セメント板、セメント珪酸カルシウム板、スラグセメントパーライト板、石綿セメント板、スレート板、ALC板、サイディング板等が挙げられる。このうち、コンクリート、モルタル等の基材は、通常、施工現場で水等と混練したものを硬化させることによって得られる。ALC板、サイディング板等のセメント質建材は、抄造法、押し出し成形法、注型法等の各種方法によって板状に成形されたものである。これら基材の表面は、何らかの表面処理(例えばパテ処理、フィラー処理等)が施されたものでもよく、既に塗膜が形成されたものでもよい。
In the present invention, a cementitious substrate is to be coated. Such a cementitious substrate is a material obtained by using cement as an essential component. As components other than cement, for example, aggregates such as silica sand, silica stone, and fly ash, fibers such as pulp and glass wool, and the like may be included.
Specifically, examples of the cementitious substrate include concrete, mortar, fiber-mixed cement board, cement calcium silicate board, slag cement pearlite board, asbestos cement board, slate board, ALC board, and siding board. Among these, base materials such as concrete and mortar are usually obtained by curing a material kneaded with water or the like at a construction site. Cementitious building materials such as ALC plates and siding plates are formed into a plate shape by various methods such as papermaking, extrusion, and casting. The surface of these base materials may have been subjected to some surface treatment (for example, putty treatment, filler treatment, etc.), or may already have a coating film formed thereon.
本発明では、水性着色塗料の塗装に先立ち、セメント質下地に対し水性下塗塗料を塗装することができる。この場合、水性下塗塗料としては、平均粒子径0.1μm以下(好ましくは0.02〜0.1μm)の水性樹脂を結合剤として含む塗料を使用することが望ましい。かかる水性樹脂の使用により、下地への浸透性が高まり、下地からのアルカリの滲出を十分に抑制することができる。水性樹脂の形態は、水分散型(樹脂エマルション)であってもよいし、水溶性であってもよい。樹脂の種類としては、例えば、酢酸ビニル樹脂、塩化ビニル樹脂、ポリエステル樹脂、エポキシ樹脂、アクリル樹脂、ウレタン樹脂、アクリルシリコン樹脂、フッ素樹脂等、あるいはこれらの複合系等を挙げることができる。これらは1種または2種以上で使用することができる。 In the present invention, prior to the application of the water-based colored paint, the water-based undercoat paint can be applied to the cementitious substrate. In this case, as the aqueous undercoat paint, it is desirable to use a paint containing an aqueous resin having an average particle size of 0.1 μm or less (preferably 0.02 to 0.1 μm) as a binder. By using such an aqueous resin, the permeability to the base is increased, and alkali exudation from the base can be sufficiently suppressed. The form of the aqueous resin may be a water-dispersed type (resin emulsion) or water-soluble. Examples of the type of resin include vinyl acetate resin, vinyl chloride resin, polyester resin, epoxy resin, acrylic resin, urethane resin, acrylic silicon resin, fluorine resin, or a composite system thereof. These can be used alone or in combination of two or more.
水性下塗塗料において、平均粒子径が異なる2種以上の水性樹脂を使用すれば、アルカリシール効果をより高めることができる。この場合においては、少なくとも1種の水性樹脂の平均粒子径が0.1μm以下であればよい。その他の水性樹脂は、平均粒子径が0.1μmを超えてもよいが、通常は0.4μm以下とする。なお、本発明における平均粒子径は、動的光散乱法により測定した値である。具体的には、動的光散乱測定装置として、マイクロトラック粒度分析計(例えば、UPA150、日機装株式会社製)を用い、検出された散乱強度をヒストグラム解析法のMarquardt法により解析した値であり、測定温度は25℃である。 If two or more types of aqueous resins having different average particle diameters are used in the water-based undercoating material, the alkali sealing effect can be further enhanced. In this case, the average particle size of at least one aqueous resin may be 0.1 μm or less. The other aqueous resin may have an average particle diameter of more than 0.1 μm, but is usually 0.4 μm or less. The average particle diameter in the present invention is a value measured by a dynamic light scattering method. Specifically, as a dynamic light scattering measurement device, using a Microtrac particle size analyzer (for example, UPA150, Nikkiso Co., Ltd.), the detected scattering intensity is a value analyzed by the Marquardt method of the histogram analysis method, The measurement temperature is 25 ° C.
水性下塗塗料における水性樹脂の混合比率は、水性下塗塗料中に固形分で5〜50重量%(好ましくは10〜30重量%)とする。水性樹脂の混合比率がかかる範囲内であれば、水性下塗塗料のチクソトロピーを低い値に設定することができ、形成塗膜における微細な凹凸の発生を抑制することができる。さらに、浸透性とシール性(造膜性)に優れた塗膜を形成することもできる。なお、水性下塗塗料における水性樹脂以外の成分は、主に水及び/または親水性有機溶剤であるが、必要に応じ着色顔料、体質顔料、増粘剤、消泡剤、造膜助剤、レベリング剤、湿潤剤、可塑剤、凍結防止剤、防腐剤、防黴剤、防藻剤、抗菌剤、分散剤、吸着剤、架橋剤等が含まれていてもよい。 The mixing ratio of the aqueous resin in the aqueous base coating is 5 to 50% by weight (preferably 10 to 30% by weight) in solid content in the aqueous base coating. If the mixing ratio of the aqueous resin is within such a range, the thixotropy of the aqueous primer coating can be set to a low value, and the occurrence of fine irregularities in the formed coating film can be suppressed. Furthermore, it is also possible to form a coating film excellent in permeability and sealing properties (film forming property). The components other than the water-based resin in the water-based undercoat paint are mainly water and / or a hydrophilic organic solvent, but if necessary, coloring pigment, extender pigment, thickener, antifoaming agent, film-forming aid, leveling Agents, wetting agents, plasticizers, antifreezing agents, preservatives, antifungal agents, antialgae agents, antibacterial agents, dispersants, adsorbents, crosslinking agents and the like may be included.
このような水性下塗塗料は、単位面積当たりの固形分が10g/m2以上(好ましくは15〜150g/m2)となるように塗装する。水性下塗塗料の塗付量がかかる範囲内であれば、後述の水性着色塗料との相乗作用により、優れたアルカリシール効果を得ることができる。
水性下塗塗料の塗装方法としては、ハケ塗り、スプレー塗装、ローラ塗装等の種々の方法を採用することができる。塗付時には水等で希釈することによって、粘性を適宜調整することもできる。希釈割合は、通常0〜50重量%程度である。塗装後の乾燥は通常、常温で行えばよいが、必要に応じ加熱することもできる。
Such an aqueous primer coating is applied so that the solid content per unit area is 10 g / m 2 or more (preferably 15 to 150 g / m 2 ). If the coating amount of the water-based undercoat paint is within such a range, an excellent alkali sealing effect can be obtained by a synergistic action with the water-colored paint described later.
Various methods such as brush coating, spray coating, roller coating and the like can be adopted as a coating method for the water-based undercoat. The viscosity can also be adjusted as appropriate by diluting with water or the like during application. The dilution ratio is usually about 0 to 50% by weight. Drying after coating is usually performed at room temperature, but can be heated as necessary.
本発明では、上述のセメント質基材に対し(必要に応じ水性下塗塗料を塗装した後に)、水性着色塗料を塗装する。
本発明における水性着色塗料は、その形成塗膜において、後述のメタリック塗料とほぼ同色(共色)の色相を呈するものである。本発明では、かかる水性着色塗料をメタリック塗料の下塗りとして採用することにより、メタリック塗料の彩度や光輝性を保持しつつ、塗膜全体の隠ぺい性を高めることができる。具体的に、水性着色塗料の色相は、水性メタリック塗料との色差が20以下(好ましくは10以下、より好ましくは5以下)となるように設定する。
なお、本発明における色差(△E)は、色差計を用いて測定される値であり、それぞれの塗膜のL*値、a*値、b*値より下記式にて算出することができる。
<式>△E={(L* 1−L* 2)2+(a* 1−a* 2)2+(b* 1−b* 2)2}0.5
(式中、L* 1、a* 1、b* 1はそれぞれ水性着色塗料の塗膜のL*、a*、b*。L* 2、a* 2、b* 2はそれぞれ水性メタリック塗料の塗膜のL*、a*、b*)
In the present invention, a water-based colored paint is applied to the above-mentioned cementitious substrate (after applying a water-based undercoat if necessary).
The water-based colored paint in the present invention exhibits a hue of substantially the same color (co-color) as a metallic paint described later in the formed coating film. In the present invention, by employing such a water-based colored paint as an undercoat of the metallic paint, it is possible to improve the concealment of the entire coating film while maintaining the saturation and glitter of the metallic paint. Specifically, the hue of the water-based colored paint is set so that the color difference from the water-based metallic paint is 20 or less (preferably 10 or less, more preferably 5 or less).
The color difference (ΔE) in the present invention is a value measured using a color difference meter, and can be calculated by the following formula from the L * value, a * value, and b * value of each coating film. .
<Equation> △ E = {(L * 1 -L * 2) 2 + (a * 1 -a * 2) 2 + (b * 1 -b * 2) 2} 0.5
(In the formula, L * 1 , a * 1 , and b * 1 are L * , a * , and b * of the paint film of the water-based colored paint, respectively . L * 2 , a * 2 , and b * 2 are the water-based metallic paint, respectively. L * , a * , b * of coating film)
本発明における水性着色塗料では、その粘度を0.1〜6Pa・sに、チクソトロピーインデックスを6.0以下に調整する。本発明では、水性着色塗料の粘性特性をかかる条件に設定することで、塗膜形成時における微細な凹凸の発生が抑制され、下地からのアルカリの滲出を抑えることができる。
水性着色塗料の粘度は、通常0.1〜6Pa・sであるが、好ましくは0.2〜4Pa・s、より好ましくは0.3〜3Pa・sである。また、チクソトロピーインデックスは、通常6.0以下であるが、好ましくは4.0以下、より好ましくは3.0以下である。チクソトロピーインデックスの下限は、通常1.0以上である。
なお、本発明における粘度は、BH型粘度計による20rpmにおける粘度(4回転目の指針値)を測定することにより求められる値である。チクソトロピーインデックス(TI)は、BH型粘度計を用い、下記式により求められる値である。いずれも測定温度は23℃である。
<式>TI=η1/η2
(式中、η1は2rpmにおける粘度(Pa・s:2回転目の指針値)。η2は20rpmにおける粘度(Pa・s:4回転目の指針値))
In the water-based colored paint in the present invention, the viscosity is adjusted to 0.1 to 6 Pa · s, and the thixotropy index is adjusted to 6.0 or less. In the present invention, by setting the viscosity characteristic of the water-based colored paint to such a condition, generation of fine irregularities during formation of the coating film is suppressed, and alkali exudation from the base can be suppressed.
The viscosity of the water-based colored paint is usually 0.1 to 6 Pa · s, preferably 0.2 to 4 Pa · s, more preferably 0.3 to 3 Pa · s. The thixotropic index is usually 6.0 or less, preferably 4.0 or less, more preferably 3.0 or less. The lower limit of the thixotropy index is usually 1.0 or more.
In addition, the viscosity in this invention is a value calculated | required by measuring the viscosity (guide value of the 4th rotation) in 20 rpm by a BH type viscometer. The thixotropy index (TI) is a value determined by the following formula using a BH viscometer. In either case, the measurement temperature is 23 ° C.
<Formula> TI = η1 / η2
(Where η1 is the viscosity at 2 rpm (Pa · s: guide value for the second rotation). Η2 is the viscosity at 20 rpm (Pa · s: guide value for the fourth rotation))
以上の如き特性を有する水性着色塗料は、合成樹脂エマルション及び着色顔料を必須成分として得ることができる。
水性着色塗料における合成樹脂エマルションとしては、少なくとも(メタ)アクリル酸アルキルエステルをモノマー成分として含むモノマー群を共重合して得られる合成樹脂エマルションが好ましく使用できる。
The water-based colored paint having the above characteristics can be obtained by using a synthetic resin emulsion and a colored pigment as essential components.
As the synthetic resin emulsion in the aqueous coloring paint, a synthetic resin emulsion obtained by copolymerizing at least a monomer group containing a (meth) acrylic acid alkyl ester as a monomer component can be preferably used.
(メタ)アクリル酸アルキルエステルの具体例としては、例えばメチル(メタ)アクリレート、エチル(メタ)アクリレート、イソプロピル(メタ)アクリレート、n−ブチル(メタ)アクリレート、イソブチル(メタ)アクリレート、n−アミル(メタ)アクリレート、イソアミル(メタ)アクリレート、n−ヘキシル(メタ)アクリレート、2−エチルヘキシル(メタ)アクリレート、オクチル(メタ)アクリレート、デシル(メタ)アクリレート、ドデシル(メタ)アクリレート、オクタデシル(メタ)アクリレート、シクロヘキシル(メタ)アクリレート、フェニル(メタ)アクリレート、ベンジル(メタ)アクリレート等が挙げられる。これらは1種または2種以上で使用することができる。なお、本発明では、アクリル酸アルキルエステルとメタクリル酸アルキルエステルを合わせて、(メタ)アクリル酸アルキルエステルと表記している。
モノマー群における(メタ)アクリル酸アルキルエステルの構成比率は、通常50重量%以上、好ましくは60重量%以上、より好ましくは70重量%以上である。上限は特に限定されないが、通常99.8重量%以下、好ましくは99.5重量%以下、より好ましくは99.2重量%以下である。
Specific examples of the (meth) acrylic acid alkyl ester include, for example, methyl (meth) acrylate, ethyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, n-amyl ( (Meth) acrylate, isoamyl (meth) acrylate, n-hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, octyl (meth) acrylate, decyl (meth) acrylate, dodecyl (meth) acrylate, octadecyl (meth) acrylate, Examples include cyclohexyl (meth) acrylate, phenyl (meth) acrylate, and benzyl (meth) acrylate. These can be used alone or in combination of two or more. In the present invention, the acrylic acid alkyl ester and the methacrylic acid alkyl ester are collectively referred to as (meth) acrylic acid alkyl ester.
The component ratio of the (meth) acrylic acid alkyl ester in the monomer group is usually 50% by weight or more, preferably 60% by weight or more, more preferably 70% by weight or more. Although an upper limit is not specifically limited, Usually, it is 99.8 weight% or less, Preferably it is 99.5 weight% or less, More preferably, it is 99.2 weight% or less.
水性着色塗料における合成樹脂エマルションとしては、上記(メタ)アクリル酸アルキルエステルに加え、カルボキシル基含有重合性モノマー及び/または水酸基含有重合性モノマーを含むモノマー群を共重合して得られるものが好適である。このような重合性モノマーを併用することにより、水性着色塗料の粘性を本発明規定内に調整しつつ、塗料の安定性、顔料分散性等を高めることができる。 As the synthetic resin emulsion in the water-based colored paint, those obtained by copolymerizing a monomer group containing a carboxyl group-containing polymerizable monomer and / or a hydroxyl group-containing polymerizable monomer in addition to the above (meth) acrylic acid alkyl ester are suitable. is there. By using such a polymerizable monomer in combination, the stability of the paint, the pigment dispersibility, and the like can be improved while adjusting the viscosity of the aqueous colored paint within the provisions of the present invention.
カルボキシル基含有重合性モノマーは、分子内にカルボキシル基と重合性不飽和結合を併有する化合物である。カルボキシル基含有重合性モノマーの具体例としては、例えばアクリル酸、メタクリル酸、クロトン酸、マレイン酸またはそのモノアルキルエステル、イタコン酸またはそのモノアルキルエステル、フマル酸またはそのモノアルキルエステル等が挙げられる。このうち、特にアクリル酸、メタクリル酸から選ばれる1種以上が好適である。モノマー群におけるカルボキシル基含有重合性モノマーの構成比率は、通常0.1〜5重量%、好ましくは0.2〜3重量%、より好ましくは0.3〜2重量%とすることが望ましい。 The carboxyl group-containing polymerizable monomer is a compound having both a carboxyl group and a polymerizable unsaturated bond in the molecule. Specific examples of the carboxyl group-containing polymerizable monomer include acrylic acid, methacrylic acid, crotonic acid, maleic acid or a monoalkyl ester thereof, itaconic acid or a monoalkyl ester thereof, fumaric acid or a monoalkyl ester thereof, and the like. Among these, at least one selected from acrylic acid and methacrylic acid is particularly preferable. The constituent ratio of the carboxyl group-containing polymerizable monomer in the monomer group is usually 0.1 to 5% by weight, preferably 0.2 to 3% by weight, and more preferably 0.3 to 2% by weight.
水酸基含有重合性モノマーは、分子内に水酸基と重合性不飽和結合を併有する化合物である。水酸基含有重合性モノマーとしては、例えば、2−ヒドロキシエチル(メタ)アクリレート、2−ヒドロキシメチル(メタ)アクリレート、2−ヒドロキシプロピル(メタ)アクリレート、エチレングリコールモノ(メタ)アクリレート、グリセロールモノ(メタ)アクリレート等が挙げられる。これらは1種または2種以上で使用することができる。モノマー群における水酸基含有重合性モノマーの構成比率は、通常0.1〜10重量%、好ましくは0.3〜8重量%、より好ましくは0.5〜5重量%とすることが望ましい。 The hydroxyl group-containing polymerizable monomer is a compound having both a hydroxyl group and a polymerizable unsaturated bond in the molecule. Examples of the hydroxyl group-containing polymerizable monomer include 2-hydroxyethyl (meth) acrylate, 2-hydroxymethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, ethylene glycol mono (meth) acrylate, and glycerol mono (meth). An acrylate etc. are mentioned. These can be used alone or in combination of two or more. The constituent ratio of the hydroxyl group-containing polymerizable monomer in the monomer group is usually 0.1 to 10% by weight, preferably 0.3 to 8% by weight, and more preferably 0.5 to 5% by weight.
水性着色塗料における合成樹脂エマルションは、本発明の効果を著しく阻害しない限り、上記モノマー以外の重合性モノマーが共重合されたものであってもよい。かかる重合性モノマーとしては、例えば、酢酸ビニル、プロピオン酸ビニル等のビニルエステル系モノマー;スチレン、ビニルトルエン、ジビニルベンゼン等の芳香族モノマー;グリシジル(メタ)アクリレート、ジグリシジル(メタ)アクリレート等のエポキシ基含有モノマー;アクロレイン、ビニルエチルケトン等のカルボニル基含有モノマー;アクリルアミド、メタクリルアミド等のアミド基含有モノマー等のアミド基含有モノマー、アクリロニトリル、メタアクリロニトリル等のニトリル基含有モノマー;N−メチルアミノエチル(メタ)アクリレート、ジメチルアミノエチル(メタ)アクリレート等のアミノ基含有モノマー;ビニルトリメトキシシラン、γ−(メタ)アクリロイルオキシプロピルトリメトキシシラン等のアルコキシシリル基含有モノマー;塩化ビニリデン、フッ化ビニリデン等のハロゲン化ビニリデン系モノマー;その他、エチレン、プロピレン、イソプレン、ブタジエン、ビニルピロリドン、塩化ビニル、ビニルエーテル、クロロプレン等が挙げられる。モノマー群におけるこのような重合性モノマーの構成比率は、通常50重量%以下、好ましくは40重量%以下、より好ましくは30重量%以下である。 The synthetic resin emulsion in the water-based colored paint may be a copolymer obtained by copolymerizing a polymerizable monomer other than the above monomers as long as the effect of the present invention is not significantly impaired. Examples of such polymerizable monomers include vinyl ester monomers such as vinyl acetate and vinyl propionate; aromatic monomers such as styrene, vinyltoluene and divinylbenzene; epoxy groups such as glycidyl (meth) acrylate and diglycidyl (meth) acrylate. Containing monomers; Carbonyl group-containing monomers such as acrolein and vinyl ethyl ketone; Amide group-containing monomers such as amide group-containing monomers such as acrylamide and methacrylamide; Nitrile group-containing monomers such as acrylonitrile and methacrylonitrile; N-methylaminoethyl (meta ) Amino group-containing monomers such as acrylate and dimethylaminoethyl (meth) acrylate; Alkoxy such as vinyltrimethoxysilane and γ- (meth) acryloyloxypropyltrimethoxysilane Silyl group-containing monomers: vinylidene chloride, vinylidene halide monomers such as vinylidene fluoride and the like; ethylene, propylene, isoprene, butadiene, vinyl pyrrolidone, vinyl chloride, vinyl ethers, chloroprene, and the like. The constituent ratio of such polymerizable monomers in the monomer group is usually 50% by weight or less, preferably 40% by weight or less, more preferably 30% by weight or less.
水性着色塗料における合成樹脂エマルションは、上記重合性モノマーを適宜混合したモノマー群を乳化重合することにより製造することができる。重合方法として公知の方法を採用すればよく、通常の乳化重合の他、ソープフリー乳化重合、フィード乳化重合、シード乳化重合等を採用することもできる。重合時には、乳化剤、開始剤、分散剤、重合禁止剤、重合抑制剤、緩衝剤、連鎖移動剤等を使用することもできる。
合成樹脂エマルションのガラス転移温度は通常−60〜80℃(好ましくは−40〜60℃)程度である。また、合成樹脂エマルションの平均粒子径は、通常0.05〜0.4μm程度である。
The synthetic resin emulsion in the water-based colored paint can be produced by emulsion polymerization of a monomer group in which the polymerizable monomers are appropriately mixed. A known method may be employed as the polymerization method, and soap-free emulsion polymerization, feed emulsion polymerization, seed emulsion polymerization, etc. may be employed in addition to ordinary emulsion polymerization. During the polymerization, an emulsifier, an initiator, a dispersant, a polymerization inhibitor, a polymerization inhibitor, a buffer, a chain transfer agent, and the like can be used.
The glass transition temperature of the synthetic resin emulsion is usually about −60 to 80 ° C. (preferably −40 to 60 ° C.). Moreover, the average particle diameter of a synthetic resin emulsion is about 0.05-0.4 micrometer normally.
着色顔料としては、通常塗料に使用可能なものであれば特に制限されず、例えば酸化チタン、カーボンブラック、酸化第二鉄(ベンガラ)、黄色酸化鉄、オーカー、群青、コバルトグリーン等の無機系顔料、アゾ系、ナフトール系、ピラゾロン系、アントラキノン系、ペリレン系、キナクリドン系、ジスアゾ系、イソインドリノン系、ベンゾイミダゾール系、フタロシアニン系、キノフタロン系等の有機顔料等が使用できる。これら着色顔料の1種または2種以上を適宜使用することにより、水性着色塗料の色相を調整することができる。
着色顔料の混合比率は、上記合成樹脂エマルションの固形分100重量部に対し、通常1〜500重量部、好ましくは5〜200重量部、より好ましくは10〜100重量部である。着色顔料の混合比率がかかる範囲内であれば、水性着色塗料の色相を水性メタリック塗料の共色に調整しつつ、塗膜の隠ぺい性を十分に確保することができる。
The coloring pigment is not particularly limited as long as it can be used for a normal coating material. For example, inorganic pigments such as titanium oxide, carbon black, ferric oxide (bengara), yellow iron oxide, ocher, ultramarine, and cobalt green. Organic pigments such as azo, naphthol, pyrazolone, anthraquinone, perylene, quinacridone, disazo, isoindolinone, benzimidazole, phthalocyanine, and quinophthalone can be used. By appropriately using one or more of these color pigments, the hue of the water-based color paint can be adjusted.
The mixing ratio of the color pigment is usually 1 to 500 parts by weight, preferably 5 to 200 parts by weight, and more preferably 10 to 100 parts by weight with respect to 100 parts by weight of the solid content of the synthetic resin emulsion. If the mixing ratio of the color pigment is within such a range, the hiding property of the coating film can be sufficiently ensured while adjusting the hue of the water-based color paint to the same color as that of the water-based metallic paint.
本発明の水性着色塗料では、上記塗料の安定性、塗装作業性等を確保するため、少量の増粘剤を混合することが望ましい。かかる増粘剤としては、例えば、ヒドロキシエチルセルロース、ポリビニルアルコール、アルカリ可溶性エマルション、会合性増粘剤等が挙げられる。このうち本発明では、塗料の粘性調整の点で会合性増粘剤が好適である。会合性増粘剤としては、エチレンオキシドウレタンブロックコポリマーが特に好適である。かかる増粘剤の混合比率は、上記合成樹脂エマルションの固形分100重量部に対し、固形分換算で通常0.05〜3重量部、好ましくは0.1〜2重量部である。 In the water-based colored paint of the present invention, it is desirable to mix a small amount of a thickener in order to ensure the stability of the paint and the coating workability. Examples of such thickeners include hydroxyethyl cellulose, polyvinyl alcohol, alkali-soluble emulsions, associative thickeners, and the like. Among these, in the present invention, an associative thickener is suitable in terms of adjusting the viscosity of the coating material. As the associative thickener, an ethylene oxide urethane block copolymer is particularly suitable. The mixing ratio of the thickener is usually 0.05 to 3 parts by weight, preferably 0.1 to 2 parts by weight in terms of solids, based on 100 parts by weight of the solids of the synthetic resin emulsion.
水性着色塗料では、上記成分に加え親水性有機溶剤を混合することもできる。特に親水性有機溶剤としては、水への溶解度が10g/100g以上(好ましくは20g/100g以上、より好ましくは∞)の親水性有機溶剤が好適である。かかる親水性有機溶剤の使用は、水性着色塗料の粘性調整の点で有利である。とりわけ、増粘剤として会合性増粘剤を使用する場合は、親水性有機溶剤を併用することにより、塗料の粘度及びチクソトロピーインデックスを本発明規定内に容易に設定することが可能となる。 In the water-based colored paint, a hydrophilic organic solvent can be mixed in addition to the above components. In particular, a hydrophilic organic solvent having a solubility in water of 10 g / 100 g or more (preferably 20 g / 100 g or more, more preferably ∞) is suitable. Use of such a hydrophilic organic solvent is advantageous in terms of adjusting the viscosity of the water-based colored paint. In particular, when an associative thickener is used as the thickener, the viscosity and thixotropy index of the coating can be easily set within the provisions of the present invention by using a hydrophilic organic solvent in combination.
具体的に、親水性有機溶剤としては、例えば、エチレングリコールモノメチルエーテル、エチレングリコールモノエチルエーテル、エチレングリコールモノプロピルエーテル、エチレングリコールイソプロピルエーテル、エチレングリコールモノブチルエーテル、エチレングリコールモノフェニルエーテル、エチレングリコールモノメチルエーテルアセテート、エチレングリコールモノエチルエーテルアセテート、エチレングリコールジメチルエーテル、エチレングリコールジエチルエーテル、ジエチレングリコール、ジエチレングリコールモノメチルエーテル、ジエチレングリコールモノエチルエーテル、ジエチレングリコールモノブチルエーテル、ジエチレングリコールモノエチルエーテルアセテート、ジエチレングリコールジメチルエーテル、ジエチレングリコールメチルエチルエーテル、ジエチレングリコールジエチルエーテル、トリエチレングリコール、トリエチレングリコールモノメチルエーテル、トリエチレングリコールモノエチルエーテル、テトラエチレングリコール、プロピレングリコール、プロピレングリコールモノメチルエーテル、プロピレングリコールモノエチルエーテル、プロピレングリールモノプロピルエーテル、プロピレングリコールモノブチルエーテル、プロピレングリコールモノメチルエーテルアセテート、ジプロピレングリコール、ジプロピレングリコールモノメチルエーテル、ジプロピレングリコールジメチルエーテル、ジプロピレングリコールモノエチルエーテル、ジプロピレングリコールモノプロピルエーテル、トリプロピレングリコールモノメチルエーテル、1,3−ブタンジオール、1,4−ブタンジオール、1,5−ペンタジオール、ヘキシレングリコール、ジアセトンアルコール、N−メチルピロリドン等が挙げられる。
親水性有機溶剤の混合比率は、上記合成樹脂エマルションの固形分100重量部に対し、通常0.2〜30重量部、好ましくは1〜20重量部である。
Specific examples of the hydrophilic organic solvent include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol isopropyl ether, ethylene glycol monobutyl ether, ethylene glycol monophenyl ether, and ethylene glycol monomethyl ether. Acetate, ethylene glycol monoethyl ether acetate, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, diethylene glycol monoethyl ether acetate, diethylene glycol dimethyl ether Ter, diethylene glycol methyl ethyl ether, diethylene glycol diethyl ether, triethylene glycol, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, tetraethylene glycol, propylene glycol, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl Ether, propylene glycol monobutyl ether, propylene glycol monomethyl ether acetate, dipropylene glycol, dipropylene glycol monomethyl ether, dipropylene glycol dimethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol monopropyl ether, tripropylene glycol Monomethyl ether, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, hexylene glycol, diacetone alcohol, N- methylpyrrolidone and the like.
The mixing ratio of the hydrophilic organic solvent is usually 0.2 to 30 parts by weight, preferably 1 to 20 parts by weight with respect to 100 parts by weight of the solid content of the synthetic resin emulsion.
本発明における水性着色塗料には、上述の成分の他に通常塗料に使用可能な成分を混合することもできる。かかる成分としては、例えば、体質顔料、レベリング剤、湿潤剤、造膜助剤、可塑剤、凍結防止剤、防腐剤、防黴剤、防藻剤、抗菌剤、分散剤、吸着剤、紫外線吸収剤、酸化防止剤、光安定剤、触媒、架橋剤等が挙げられる。
なお、水性着色塗料のpHは、6.0〜8.0であることが望ましい。pHがかかる範囲内であれば、水性着色塗料の粘性調整の点で有利である。
In addition to the above-mentioned components, components that can be used in ordinary coating materials can be mixed with the water-based colored coating material in the present invention. Examples of such components include extender pigments, leveling agents, wetting agents, film-forming aids, plasticizers, antifreezing agents, preservatives, antifungal agents, anti-algae agents, antibacterial agents, dispersants, adsorbents, and UV absorbing agents. Agents, antioxidants, light stabilizers, catalysts, crosslinking agents and the like.
The pH of the water-based colored paint is desirably 6.0 to 8.0. If the pH is within such a range, it is advantageous in terms of adjusting the viscosity of the water-based colored paint.
以上の如き水性着色塗料の塗装においては、単位面積当たりの固形分が30g/m2以上(好ましくは50〜300g/m2、より好ましくは60〜200g/m2)となるように塗装を行う。水性着色塗料の塗付量がかかる範囲内であれば、優れたアルカリシール効果と隠ぺい効果を得ることができる。 In the application of the water-based colored paint as described above, the solid content per unit area is 30 g / m 2 or more (preferably 50 to 300 g / m 2 , more preferably 60 to 200 g / m 2 ). . As long as the application amount of the water-based coloring paint is within such a range, an excellent alkali sealing effect and concealment effect can be obtained.
水性着色塗料の塗装方法としては、ハケ塗り、スプレー塗装、ローラ塗装等の種々の方法を採用することができる。このうち、ローラ塗装を行う場合、一般の塗料では形成塗膜において微細な凹凸が発生しやすいが、本発明の水性着色塗料では、このような凹凸発生を抑制することができる。すなわち、本発明は、水性着色塗料の塗装をローラブラシを用いて行った場合に、特に有利な効果を得ることができるものである。ローラブラシとしては、天然繊維、合成繊維等の繊維からなるローラブラシが好適である。 Various methods such as brush coating, spray coating, roller coating, and the like can be employed as a method for applying the water-based coloring paint. Among these, when roller coating is performed, fine unevenness is likely to occur in the formed coating film with a general paint, but the occurrence of such unevenness can be suppressed with the water-based colored paint of the present invention. That is, the present invention can obtain a particularly advantageous effect when the water-based colored paint is applied using a roller brush. As the roller brush, a roller brush made of fibers such as natural fibers and synthetic fibers is suitable.
水性着色塗料の塗付時には水等で希釈することによって、塗料の粘性を本発明規定内に適宜調整することもできる。希釈割合は、通常0〜20重量%程度である。塗装後の乾燥は通常、常温で行えばよいが、必要に応じ加熱することもできる。 The viscosity of the paint can be appropriately adjusted within the scope of the present invention by diluting with water or the like when applying the water-based colored paint. The dilution ratio is usually about 0 to 20% by weight. Drying after coating is usually performed at room temperature, but can be heated as necessary.
本発明では、以上のように水性着色塗料を塗装した後、水性メタリック塗料を塗装する。かかる水性メタリック塗料としては、その形成塗膜においてメタリック感が表出可能なものであれば特に制限されず、公知または市販もののも使用できる。本発明では特に、合成樹脂エマルション及び金属粉顔料を必須成分とし、合成樹脂エマルションの固形分100重量部に対し金属粉顔料を1〜100重量部含む水性メタリック塗料が好適である。 In the present invention, after applying the water-based colored paint as described above, the water-based metallic paint is applied. The water-based metallic paint is not particularly limited as long as it can exhibit a metallic feeling in the formed coating film, and a known or commercially available one can also be used. In the present invention, a water-based metallic paint containing a synthetic resin emulsion and a metal powder pigment as essential components and containing 1 to 100 parts by weight of the metal powder pigment with respect to 100 parts by weight of the solid content of the synthetic resin emulsion is particularly suitable.
水性メタリック塗料における合成樹脂エマルションとしては、例えば、酢酸ビニル樹脂エマルション、塩化ビニル樹脂エマルション、エポキシ樹脂エマルション、アクリル樹脂エマルション、ウレタン樹脂エマルション、アクリルシリコン樹脂エマルション、フッ素樹脂エマルション等、あるいはこれらの複合系等を挙げることができる。これらは1種または2種以上で使用することができる。 Examples of the synthetic resin emulsion in the aqueous metallic paint include, for example, a vinyl acetate resin emulsion, a vinyl chloride resin emulsion, an epoxy resin emulsion, an acrylic resin emulsion, a urethane resin emulsion, an acrylic silicon resin emulsion, a fluororesin emulsion, or a composite system thereof. Can be mentioned. These can be used alone or in combination of two or more.
かかる合成樹脂エマルションは、架橋反応性を有するものであってもよい。合成樹脂エマルションが架橋反応型合成樹脂エマルションである場合は、塗膜の耐水性、耐候性、密着性等を高めることができる。架橋反応型合成樹脂エマルションは、それ自体で架橋反応を生じるもの、あるいは別途混合する架橋剤によって架橋反応を生じるもののいずれであってもよい。このような架橋反応性は、例えば、カルボキシル基と金属イオン、カルボキシル基とカルボジイミド基、カルボキシル基とエポキシ基、カルボキシル基とアジリジン基、カルボキシル基とオキサゾリン基、水酸基とイソシアネート基、カルボニル基とヒドラジド基、エポキシ基とアミノ基、アルド基とセミカルバジド基、ケト基とセミカルバジド基、アルコキシル基どうし等の反応性官能基を組み合わせることによって付与することができる。 Such a synthetic resin emulsion may have crosslinking reactivity. When the synthetic resin emulsion is a cross-linking reaction type synthetic resin emulsion, the water resistance, weather resistance, adhesion and the like of the coating film can be improved. The crosslinking reaction type synthetic resin emulsion may be either one that causes a crosslinking reaction by itself or one that causes a crosslinking reaction by a separately mixed crosslinking agent. Such crosslinking reactivity includes, for example, carboxyl group and metal ion, carboxyl group and carbodiimide group, carboxyl group and epoxy group, carboxyl group and aziridine group, carboxyl group and oxazoline group, hydroxyl group and isocyanate group, carbonyl group and hydrazide group. It can be imparted by combining reactive functional groups such as epoxy groups and amino groups, aldo groups and semicarbazide groups, keto groups and semicarbazide groups, and alkoxyl groups.
合成樹脂エマルションのガラス転移温度は通常−60〜80℃(好ましくは−40〜60℃)程度である。また、合成樹脂エマルションの平均粒子径は、通常0.05〜0.4μm程度である。 The glass transition temperature of the synthetic resin emulsion is usually about −60 to 80 ° C. (preferably −40 to 60 ° C.). Moreover, the average particle diameter of a synthetic resin emulsion is about 0.05-0.4 micrometer normally.
水性メタリック塗料における金属粉顔料は、形成塗膜にメタリック感を付与する成分である。金属粉顔料としては、例えばアルミニウム、銅、ニッケル、マグネシウム、亜鉛、真鍮等、及びそれらの合金等が使用できる。この中でも特に金属粉顔料としてアルミニウム顔料を含む場合に、本発明では有利な効果を得ることができる。
アルミニウム顔料としては、種々の表面処理を施したものも使用できる。例えば、アトマイズドアルミニウム粉及び/またはアルミニウム箔を、脂肪酸、脂肪族アミン、脂肪族アミド、脂肪族アルコール等の粉砕助剤を用いて粉砕した後、さらにクロム酸、リン酸、リン酸塩、リン酸エステル、バナジン酸塩、酸化バナジウム、モリブデン酸塩、シリカ等によって処理を施したもの等が使用できる。このような処理を施したアルミニウム顔料を使用すれば、水との接触による水素ガスの発生を抑制することもできる。
The metal powder pigment in the aqueous metallic paint is a component that imparts a metallic feeling to the formed coating film. As the metal powder pigment, for example, aluminum, copper, nickel, magnesium, zinc, brass, and alloys thereof can be used. Among these, particularly when an aluminum pigment is included as a metal powder pigment, an advantageous effect can be obtained in the present invention.
As the aluminum pigment, those subjected to various surface treatments can also be used. For example, after atomized aluminum powder and / or aluminum foil is pulverized using a grinding aid such as fatty acid, aliphatic amine, aliphatic amide, aliphatic alcohol, etc., chromic acid, phosphoric acid, phosphate, phosphorus Those treated with acid ester, vanadate, vanadium oxide, molybdate, silica or the like can be used. If the aluminum pigment which gave such a process is used, generation | occurrence | production of hydrogen gas by contact with water can also be suppressed.
金属粉顔料の形状は、通常リン片状であり、その平均粒径は通常1〜50μm(好ましくは5〜30μm)程度である。 The shape of the metal powder pigment is usually flake shaped, and the average particle size is usually about 1 to 50 μm (preferably 5 to 30 μm).
金属粉顔料の混合比率は、上記合成樹脂エマルションの固形分100重量部に対し、通常1〜100重量部、好ましくは2〜80重量部である。金属粉顔料が1重量部より少ない場合は、形成塗膜において十分なメタリック感を得ることができず、100重量部より多い場合は、塗料の流動性が低下し、塗装作業に支障をきたすおそれがある。また、形成塗膜に微細な凹凸が生じ、仕上外観に悪影響を及ぼしやすくなる。 The mixing ratio of the metal powder pigment is usually 1 to 100 parts by weight, preferably 2 to 80 parts by weight with respect to 100 parts by weight of the solid content of the synthetic resin emulsion. When the amount of the metal powder pigment is less than 1 part by weight, a sufficient metallic feeling cannot be obtained in the formed coating film. When the amount is more than 100 parts by weight, the fluidity of the paint is lowered, which may hinder the painting operation. There is. In addition, fine irregularities are formed on the formed coating film, which tends to adversely affect the finished appearance.
水性メタリック塗料では、上記金属粉顔料以外の着色顔料を使用することもできる。かかる着色顔料を水性メタリック塗料に混合することで、塗料の色相を調整することができ、様々な色彩を有するメタリック塗膜が得られる。ただし、着色顔料の混合量が多すぎると、形成塗膜の彩度や光輝性が低下するおそれがあるため、注意を要する。
着色顔料としては、通常塗料に使用可能なものであれば特に制限されず、例えば酸化チタン、カーボンブラック、酸化第二鉄(ベンガラ)、黄色酸化鉄、オーカー、群青、コバルトグリーン等の無機系顔料、アゾ系、ナフトール系、ピラゾロン系、アントラキノン系、ペリレン系、キナクリドン系、ジスアゾ系、イソインドリノン系、ベンゾイミダゾール系、フタロシアニン系、キノフタロン系等の有機顔料等が使用できる。これら着色顔料は、所望の色彩に応じて1種または2種以上を適宜使用することができる。
着色顔料の混合比率は、上記合成樹脂エマルションの固形分100重量部に対し通常200重量部以下、好ましくは0.1〜100重量部である。
In the water-based metallic paint, a color pigment other than the metal powder pigment can be used. By mixing such a color pigment into an aqueous metallic paint, the hue of the paint can be adjusted, and metallic coating films having various colors can be obtained. However, if the amount of the color pigment is too large, the saturation and glitter of the formed coating film may be lowered, so care must be taken.
The coloring pigment is not particularly limited as long as it can be used for a normal coating material. For example, inorganic pigments such as titanium oxide, carbon black, ferric oxide (bengara), yellow iron oxide, ocher, ultramarine, and cobalt green. Organic pigments such as azo, naphthol, pyrazolone, anthraquinone, perylene, quinacridone, disazo, isoindolinone, benzimidazole, phthalocyanine, and quinophthalone can be used. These color pigments can be used singly or in combination of two or more depending on the desired color.
The mixing ratio of the color pigment is usually 200 parts by weight or less, preferably 0.1 to 100 parts by weight with respect to 100 parts by weight of the solid content of the synthetic resin emulsion.
本発明における水性メタリック塗料には、上述の成分の他に通常塗料に使用可能な成分を混合することもできる。かかる成分としては、例えば、体質顔料、増粘剤、造膜助剤、レベリング剤、湿潤剤、可塑剤、凍結防止剤、防腐剤、防黴剤、防藻剤、抗菌剤、分散剤、吸着剤、紫外線吸収剤、酸化防止剤、光安定剤、触媒、架橋剤等が挙げられる。 In addition to the above-mentioned components, the water-based metallic paint in the present invention can be mixed with components that can be used in ordinary paints. Examples of such components include extender pigments, thickeners, film-forming aids, leveling agents, wetting agents, plasticizers, antifreezing agents, antiseptics, antifungal agents, antialgae agents, antibacterial agents, dispersants, and adsorption agents. Agents, ultraviolet absorbers, antioxidants, light stabilizers, catalysts, crosslinking agents and the like.
水性メタリック塗料の塗装方法としては、ハケ塗り、スプレー塗装、ローラ塗装等の種々の方法を採用することができる。塗装を行う際には、単位面積当たりの固形分が50g/m2以上(好ましくは80〜300g/m2、より好ましくは100〜200g/m2)となるように塗装する。
塗付時には水等で希釈することによって、塗料の粘性を適宜調整することもできる。希釈割合は、通常0〜20重量%程度である。塗装後の乾燥は通常、常温で行えばよいが、必要に応じ加熱することもできる。
As a coating method of the water-based metallic paint, various methods such as brush coating, spray coating, and roller coating can be employed. When performing painting, solids per unit area 50 g / m 2 or more (preferably 80~300g / m 2, more preferably 100 to 200 g / m 2) painting so that.
At the time of application, the viscosity of the paint can be appropriately adjusted by diluting with water or the like. The dilution ratio is usually about 0 to 20% by weight. Drying after coating is usually performed at room temperature, but can be heated as necessary.
水性メタリック塗料を塗装した後には、水性クリヤー塗料を塗装することができる。かかる水性クリヤー塗料の塗装により、耐久性、耐汚染性、美観性(光沢感)等を高めることができる。水性クリヤー塗料としては、アクリル樹脂エマルション、ウレタン樹脂エマルション、アクリルシリコン樹脂エマルション、フッ素樹脂エマルション等をバインダーとするものが使用できる。また、下層のメタリック塗膜の美観性が著しく損なわれない範囲内であれば、着色タイプのものも使用できる。 After applying the water-based metallic paint, the water-based clear paint can be applied. By applying such a water-based clear paint, durability, stain resistance, aesthetics (glossiness), and the like can be enhanced. As the water-based clear paint, those using an acrylic resin emulsion, a urethane resin emulsion, an acrylic silicon resin emulsion, a fluororesin emulsion or the like as a binder can be used. Moreover, a colored type can be used as long as the aesthetics of the lower metallic coating are not significantly impaired.
水性クリヤー塗料の塗装方法は、公知の方法に従えばよく、ハケ塗り、スプレー塗装、ローラ塗装等の種々の方法を採用することができる。塗装を行う際には、単位面積当たりの固形分が10g/m2以上(好ましくは20〜200g/m2)となるように塗装する。
塗付時には水等で希釈することによって、塗料の粘性を適宜調整することもできる。希釈割合は、通常0〜20重量%程度である。水性クリヤー塗料を塗装した後の乾燥は通常、常温で行えばよいが、必要に応じ加熱することもできる。
The application method of the water-based clear paint may be a known method, and various methods such as brush coating, spray coating, and roller coating can be employed. When performing the coating, the coating is performed so that the solid content per unit area is 10 g / m 2 or more (preferably 20 to 200 g / m 2 ).
At the time of application, the viscosity of the paint can be appropriately adjusted by diluting with water or the like. The dilution ratio is usually about 0 to 20% by weight. Drying after applying the water-based clear coating is usually performed at room temperature, but may be heated as necessary.
以下に実施例を示し、本発明の特徴をより明確にする。 Examples are given below to clarify the features of the present invention.
(水性下塗塗料の製造)
・水性下塗塗料A
容器内に合成樹脂エマルションA(スチレン−ブチルアクリレート−アクリルアミド−(2−ヒドロキシエチルメタクリレート)−グリシジルメタクリレート共重合体、pH7.0、固形分50重量%、ガラス転移温度2℃、平均粒子径0.08μm)を200重量部仕込み、これに2,2,4−トリメチル−1,3−ペンタンジオールモノイソブチレートを5重量部、水を180重量部、シリコーン系消泡剤を1重量部混合し、常法で均一に攪拌することによって水性下塗塗料Aを製造した。この水性下塗塗料Aにおける樹脂量(固形分)は26重量%である。
(Manufacture of water-based primer)
・ Water-based primer A
Synthetic resin emulsion A (styrene-butyl acrylate-acrylamide- (2-hydroxyethyl methacrylate) -glycidyl methacrylate copolymer, pH 7.0, solid content 50% by weight, glass transition temperature 2 ° C., average particle size 0. 0,8 μm) was added to 200 parts by weight, and 5 parts by weight of 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate, 180 parts by weight of water, and 1 part by weight of a silicone-based antifoaming agent were mixed therewith. A water-based undercoat paint A was produced by stirring uniformly in a conventional manner. The amount of resin (solid content) in this aqueous primer coating A is 26% by weight.
・水性下塗塗料B
容器内に合成樹脂エマルションAを100重量部仕込み、これに合成樹脂エマルションB(スチレン−メチルメタクリレート−ブチルアクリレート−アクリルアミド−メタクリル酸共重合体、pH7.2、固形分50重量%、ガラス転移温度5℃、平均粒子径0.2μm)を100重量部、2,2,4−トリメチル−1,3−ペンタンジオールモノイソブチレートを5重量部、水を180重量部、シリコーン系消泡剤を1重量部混合し、常法で均一に攪拌することによって水性下塗塗料Bを製造した。この水性下塗塗料Bにおける樹脂量(固形分)は26重量%である。
・ Water-based primer B
In a container, 100 parts by weight of synthetic resin emulsion A was charged, and synthetic resin emulsion B (styrene-methyl methacrylate-butyl acrylate-acrylamide-methacrylic acid copolymer, pH 7.2, solid content 50% by weight, glass transition temperature 5 100 ° C., average particle diameter 0.2 μm), 5 parts by weight of 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate, 180 parts by weight of water, and 1 silicone defoamer Aqueous primer B was prepared by mixing parts by weight and stirring uniformly by a conventional method. The resin amount (solid content) in this water-based undercoat paint B is 26% by weight.
(水性着色塗料の製造)
表1に示す配合に従い、常法により各原料を均一に混合して水性着色塗料A〜Eを製造した。なお、水性着色塗料の製造においては以下の原料を使用した。
・合成樹脂エマルションC(メチルメタクリレート−スチレン−(2−エチルヘキシルアクリレート)−(2−ヒドロキシエチルメタクリレート)−メタクリル酸共重合体、pH7.0、固形分50重量%、ガラス転移温度16℃)
・合成樹脂エマルションD(メチルメタクリレート−スチレン−(2−エチルヘキシルアクリレート)−メタクリル酸共重合体、pH7.1、固形分50重量%、ガラス転移温度16℃)
・着色顔料A:酸化チタン70重量%分散液
・着色顔料B:カーボンブラック24重量%分散液
・有機溶剤A:トリプロピレングリコールモノメチルエーテル(水への溶解度∞)
・有機溶剤B:トリプロピレングリコールモノブチルエーテル(水への溶解度3g/100g)
・増粘剤A:会合性増粘剤(エチレンオキシドウレタンブロックコポリマー、固形分20重量%)
・増粘剤B:アルカリ可溶性エマルション(固形分20重量%)
・pH調整剤:25重量%アンモニア
・消泡剤:シリコーン系消泡剤
(Manufacture of water-based coloring paint)
According to the formulation shown in Table 1, water-based colored paints A to E were produced by uniformly mixing the raw materials by a conventional method. The following raw materials were used in the production of the water-based colored paint.
Synthetic resin emulsion C (methyl methacrylate-styrene- (2-ethylhexyl acrylate)-(2-hydroxyethyl methacrylate) -methacrylic acid copolymer, pH 7.0, solid content 50% by weight, glass transition temperature 16 ° C.)
Synthetic resin emulsion D (methyl methacrylate-styrene- (2-ethylhexyl acrylate) -methacrylic acid copolymer, pH 7.1, solid content 50% by weight, glass transition temperature 16 ° C.)
Coloring pigment A: Titanium oxide 70% by weight dispersion Coloring pigment B: Carbon black 24% by weight dispersion Organic solvent A: Tripropylene glycol monomethyl ether (solubility in water ∞)
Organic solvent B: tripropylene glycol monobutyl ether (water solubility 3 g / 100 g)
・ Thickener A: Associative thickener (ethylene oxide urethane block copolymer, solid content 20% by weight)
Thickener B: alkali-soluble emulsion (solid content 20% by weight)
-PH adjuster: 25% by weight ammonia-Antifoaming agent: Silicone antifoaming agent
(水性メタリック塗料の製造)
容器内に合成樹脂エマルションCを200重量部仕込み、これにアルミニウム顔料(平均粒子径15μm)を20重量部、トリプロピレングリコールモノメチルエーテルを12重量部、会合性増粘剤を2重量部、シリコーン系消泡剤0.8重量部等を常法にて順次混合・攪拌することによって水性メタリック塗料Aを製造した。
(Manufacture of water-based metallic paint)
200 parts by weight of synthetic resin emulsion C is charged in a container, 20 parts by weight of aluminum pigment (average particle size 15 μm), 12 parts by weight of tripropylene glycol monomethyl ether, 2 parts by weight of associative thickener, silicone Aqueous metallic paint A was produced by sequentially mixing and stirring 0.8 parts by weight of an antifoaming agent and the like in a conventional manner.
(水性クリヤー塗料の製造)
容器内に合成樹脂エマルションCを200重量部仕込み、これにトリプロピレングリコールモノメチルエーテルを12重量部、シリコーン系消泡剤0.8重量部等を常法にて順次混合・攪拌することによって水性クリヤー塗料Aを製造した。
(Manufacture of water-based clear paint)
200 parts by weight of the synthetic resin emulsion C is charged in a container, and 12 parts by weight of tripropylene glycol monomethyl ether, 0.8 parts by weight of a silicone-based antifoaming agent, etc. are sequentially mixed and stirred in the usual manner. Paint A was produced.
(試験方法)
・試験例1
スレート板に対し、水性下塗塗料Aを単位面積当たりの固形分が40g/m2となるようにスプレー塗りし、標準状態(温度23℃・相対湿度50%)で3時間乾燥後、水性着色塗料Aを単位面積当たりの固形分が70g/m2となるようにローラ塗りし、標準状態で24時間乾燥させた。次いで、水性メタリック塗料Aを単位面積当たりの固形分が150g/m2となるようにローラ塗りし、標準状態で24時間乾燥後、水性クリヤー塗料Aを単位面積当たりの固形分が70g/m2となるようにスプレー塗りし、標準状態で14日間乾燥させた。
以上の方法で得られた試験体について、促進耐候性試験機としてスーパーUVテスター(岩崎電気株式会社製)を用い、光照射6時間・結露2時間(計8時間)を1サイクルとして計30サイクルまで試験を行った。このときの試験体表面の状態(艶引け、変色等)を確認し、全く異常がないものを◎、ほとんど異常がないものを○、一部に異常がみられるものを△、全体に異常がみられるものを×とした。
(Test method)
Test example 1
Water-based undercoating paint A is spray-coated on the slate plate so that the solid content per unit area is 40 g / m 2 , dried in standard conditions (temperature 23 ° C., relative humidity 50%) for 3 hours, and then water-based coloring paint A was applied with a roller so that the solid content per unit area was 70 g / m 2, and dried in a standard state for 24 hours. Next, the water-based metallic paint A is applied with a roller so that the solid content per unit area is 150 g / m 2 , dried in a standard state for 24 hours, and then the water-based clear paint A has a solid content per unit area of 70 g / m 2. And sprayed for 14 days under standard conditions.
About the test body obtained by the above method, a super UV tester (manufactured by Iwasaki Electric Co., Ltd.) is used as an accelerated weathering tester, and light irradiation 6 hours and condensation 2 hours (8 hours in total) are set as one cycle for a total of 30 cycles The test was conducted up to. Check the condition of the specimen surface (glossing, discoloration, etc.) at this time, ◎ if there is no abnormality, ○ if there is almost no abnormality, △ if there is a partial abnormality, What was seen was made into x.
・試験例2〜6
表2に示す組合せにおいて、上記実施例1と同様の方法で試験を行った。
Test examples 2-6
In the combinations shown in Table 2, tests were performed in the same manner as in Example 1 above.
Claims (5)
前記水性着色塗料として、
(メタ)アクリル酸アルキルエステルに加え、水酸基含有重合性モノマーを含むモノマー群を共重合して得られる合成樹脂エマルション、着色顔料、水への溶解度が10g/100g以上の親水性有機溶剤及び会合性増粘剤を必須成分とし、該合成樹脂エマルションの固形分100重量部に対し該着色顔料を1〜500重量部含み、
前記水性メタリック塗料との色差△Eが20以下であり、
粘度が0.3〜3Pa・s、チクソトロピーインデックスが3.0以下である水性着色塗料を使用し、
前記水性着色塗料の単位面積当たりの固形分が30g/m2以上となるように塗装することを特徴とするセメント質基材の塗装方法。 In the painting method of painting a water-based colored paint and a water-based metallic paint sequentially on a cementitious substrate,
As the water-based colored paint,
In addition to (meth) acrylic acid alkyl ester, a synthetic resin emulsion obtained by copolymerizing a monomer group containing a hydroxyl group-containing polymerizable monomer , a coloring pigment , a hydrophilic organic solvent having a solubility in water of 10 g / 100 g or more, and associative properties A thickener as an essential component, containing 1 to 500 parts by weight of the coloring pigment with respect to 100 parts by weight of the solid content of the synthetic resin emulsion,
The color difference ΔE with the water-based metallic paint is 20 or less,
Using a water-based colored paint having a viscosity of 0.3 to 3 Pa · s and a thixotropy index of 3.0 or less,
A method for coating a cementitious substrate, wherein the coating is performed so that the solid content per unit area of the water-based colored paint is 30 g / m 2 or more.
平均粒子径0.1μm以下の水性樹脂を結合剤とし、該水性樹脂を固形分で5〜50重量%含む水性下塗塗料を、単位面積当たりの固形分が10g/m2以上となるように塗装することを特徴とする請求項1から請求項3のいずれかに記載のセメント質基材の塗装方法。 Prior to the application of the water-based colored paint,
An aqueous base coating material containing an aqueous resin having an average particle size of 0.1 μm or less as a binder and containing 5 to 50% by weight of the aqueous resin in a solid content is applied so that the solid content per unit area is 10 g / m 2 or more. The method for coating a cementitious substrate according to any one of claims 1 to 3, wherein:
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