JP6893089B2 - Water-based coating material composition that imparts design to the outer wall - Google Patents
Water-based coating material composition that imparts design to the outer wall Download PDFInfo
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本発明は、建築物の外壁に０．５〜６．５ｍｍ厚に塗付し、該外壁に様々な凹凸模様から成る意匠性を付与する一液型の水系塗材組成物であって、特には塗材表面の汚れの付着が少ない外壁に意匠性を付与する水系塗材組成物に関するものである。 The present invention is a one-component water-based coating material composition that is applied to the outer wall of a building to a thickness of 0.5 to 6.5 mm and imparts a design property consisting of various uneven patterns to the outer wall. The present invention relates to a water-based coating material composition that imparts design to an outer wall with less adhesion of stains on the surface of the coating material.
従来、耐候性、耐薬品性、耐水性などの耐久性が向上し、かつ低汚染性をも改善した水性塗料用樹脂組成物が提案されている。該水性塗料用樹脂組成物は、（ａ）有機合成樹脂のエマルション、（ｂ）カップリング剤、および（ｃ）前記有機合成樹脂（ａ）以外でかつ前記カップリング剤（ｂ）と反応し得る基を有する親水化用有機化合物からなる低汚染型水性塗料用樹脂組成物である（特許文献1参照）。 Conventionally, resin compositions for water-based paints have been proposed, which have improved durability such as weather resistance, chemical resistance, and water resistance, and also have improved low stain resistance. The resin composition for an aqueous coating can react with (a) an emulsion of an organic synthetic resin, (b) a coupling agent, and (c) other than the organic synthetic resin (a) and with the coupling agent (b). It is a resin composition for a low-contamination water-based paint composed of an organic compound for hydrophilization having a group (see Patent Document 1).
また、建築物の躯体保護に使用し塗膜の耐汚染性を飛躍的に向上した水性低汚染塗料組成物が提案されている。該水性低汚染塗料組成物は、特定のエマルジョン粒子として、コア層（１）がシラン化合物、アクリル系化合物、スチレン、アクリルニトリル系化合物、メタクリル系化合物の共重合体、シェル層（２）がシラン化合物、アクリル系化合物、スチレン、アクリルニトリル系化合物、メタクリル系化合物からなる共重合体のコア・シェル重合体の樹脂エマルジョンの固形分が、全塗料組成物の固形分に対して１０〜３０重量部、ウェッティング剤が０．５〜５．０重量部を含むことを特徴とする水性低汚染塗料組成物である（特許文献２参照）。 Further, a water-based low-contamination coating composition used for protecting the building frame and dramatically improving the stain resistance of the coating film has been proposed. In the aqueous low-contamination coating composition, the core layer (1) is a silane compound, an acrylic compound, a styrene, an acrylic nitrile compound, a copolymer of a methacrylic compound, and the shell layer (2) is silane as specific emulsion particles. The solid content of the resin emulsion of the core-shell polymer of a copolymer composed of a compound, an acrylic compound, a styrene, an acrylic nitrile compound, and a methacrylic compound is 10 to 30 parts by weight based on the solid content of the total coating composition. , A water-based low-contamination coating composition containing 0.5 to 5.0 parts by weight of a wetting agent (see Patent Document 2).
また、水系塗料からなる塗膜において、屋外に曝露されたとき従来に比べ雨筋状の汚染を低減でき、特に塗膜形成直後からの汚れが防止でき、持続性に優れ、かつ塗料としての貯蔵安定性が良好な低汚染性水性被覆組成物及びその被覆物が提案されている。該低汚染性水性被覆組成物及びその被覆物は、（Ａ）水性樹脂組成物、及び、（Ｂ）平均粒子径４〜１００ｎｍの水分散型無機粒子（固形分）１〜３００質量部を乳化安定化剤として、１種又は２種以上のα，β−エチレン性不飽和単量体１００質量部を乳化重合して得られる水性分散体を含有することを特徴とする低汚染性水性被覆組成物であり、塗膜表面を親水化して水濡れ性を良くし、雨水が塗膜と汚染物質との界面に浸透して汚染物質を洗い流す機能を有するものである（特許文献３参照）。 In addition, in a coating film made of water-based paint, when exposed to the outdoors, rain streak-like contamination can be reduced, in particular, stains can be prevented immediately after the coating film is formed, and it is excellent in durability and stored as a paint. A low-staining aqueous coating composition having good stability and a coating thereof have been proposed. The low-contamination aqueous coating composition and its coating emulsify (A) an aqueous resin composition and (B) 1 to 300 parts by mass of aqueous dispersion type inorganic particles (solid content) having an average particle diameter of 4 to 100 nm. A low-contamination aqueous coating composition characterized by containing an aqueous dispersion obtained by emulsion polymerization of 100 parts by mass of one or more α, β-ethylenic unsaturated monomers as a stabilizer. It has a function of making the surface of the coating film hydrophilic to improve water wettability, and rainwater permeates the interface between the coating film and the pollutant to wash away the pollutant (see Patent Document 3).
また、建造物の外壁面に存在する旧塗膜の上に下塗塗料を塗布して下塗塗膜を形成した後、この下塗塗膜の上に親水性防汚塗料を塗布し、塗膜厚が１０〜４０μmであって、塗膜表面の水接触角が５０°以下である親水性防汚塗膜を形成することを特徴とする建造物外壁面の親水性防汚処理方法が提案されている（特許文献４参照）。 Further, after the undercoat paint is applied on the old coating film existing on the outer wall surface of the building to form the undercoat coating film, the hydrophilic antifouling paint is applied on the undercoat coating film to increase the thickness of the coating film. A method for hydrophilic antifouling treatment of the outer wall surface of a building has been proposed, which comprises forming a hydrophilic antifouling coating film having a water contact angle of 10 to 40 μm and a water contact angle of 50 ° or less on the surface of the coating film. (See Patent Document 4).
しかしながら、特許文献１に係る低汚染型水性塗料用樹脂組成物は、持続的な表面親水化のためにカップリング剤と親水化用有機化合物を反応させる構成であり、予想通りの効果を得るには被塗布物に塗装する直前にこれらを混合する必要があり、結果として一液型とは成らないと共に、該低汚染型水性塗料用樹脂組成物の塗装膜厚は４０μｍ程度であるため、本願発明のような、外壁に０．５〜６．５ｍｍ厚に塗付する一液型の水系塗材組成物には適用できないという課題がある。 However, the resin composition for a low-contamination water-based paint according to Patent Document 1 has a configuration in which a coupling agent and an organic compound for hydrophilization are reacted for continuous surface hydrophilicity, and an expected effect can be obtained. It is necessary to mix these immediately before coating on the object to be coated, and as a result, it does not become a one-component type, and the coating film thickness of the low-contamination type water-based paint resin composition is about 40 μm. There is a problem that it cannot be applied to a one-component water-based coating material composition such as the present invention, which is applied to an outer wall to a thickness of 0.5 to 6.5 mm.
また、特許文献２に係る水性低汚染塗料組成物は、ウェッティング剤により塗膜を親水化すると同時に塗膜表面に静電防止効果を付与することで耐汚染性が向上されていても、雨水等で該ウェッティング剤が塗膜表面より洗い流されると耐汚染性が低下する場合があるという課題がある。 Further, in the water-based low-contamination coating composition according to Patent Document 2, even if the stain resistance is improved by making the coating film hydrophilic with a wetting agent and at the same time imparting an antistatic effect to the coating film surface, rainwater There is a problem that the stain resistance may be lowered when the wetting agent is washed away from the surface of the coating film.
また、特許文献３に係る低汚染性水性被覆組成物は、水分散型無機粒子であるコロイダルシリカを乳化剤として作用させることにより塗膜の耐水性を低下させる界面活性剤を組成物中に含まないようにすると共に、該コロイダルシリカにより塗膜表面を親水化することで雨筋状の汚染を低減させているが、あくまで該組成物の塗布厚みは６ｍｉｌ（約０．１５ｍｍ）程度であり、特許文献１の低汚染型水性塗料用樹脂組成物と同様に、本願発明のような、外壁に０．５〜６．５ｍｍ厚に塗付する一液型の水系塗材組成物には適用できないという課題がある。 Further, the low-contamination water-based coating composition according to Patent Document 3 does not contain a surfactant that lowers the water resistance of the coating film by acting as an emulsifier on colloidal silica which is an aqueous dispersion type inorganic particle. Although the coating film surface is made hydrophilic with the colloidal silica to reduce rain streak-like contamination, the coating thickness of the composition is only about 6 mil (about 0.15 mm), which is patented. Similar to the resin composition for low-contamination water-based coating film of Document 1, it is said that it cannot be applied to a one-component water-based coating material composition to be applied to an outer wall with a thickness of 0.5 to 6.5 mm as in the present invention. There are challenges.
また、特許文献４に係る建造物外壁面の親水性防汚処理方法に記載の親水性防汚塗料は、上記特許文献１及び特許文献３の組成物と同様に塗膜厚みが１０〜４０μｍと薄膜であるため、同様に本願発明のような、外壁に０．５〜６．５ｍｍ厚に塗付する一液型の水系塗材組成物には適用できないという課題がある。 Further, the hydrophilic antifouling paint described in the hydrophilic antifouling treatment method for the outer wall surface of a building according to Patent Document 4 has a coating film thickness of 10 to 40 μm, similarly to the compositions of Patent Documents 1 and 3. Since it is a thin film, there is a problem that it cannot be applied to a one-component water-based coating material composition to be applied to an outer wall with a thickness of 0.5 to 6.5 mm, as in the present invention.
本発明の課題は、一液型であって、塗付膜厚が０．５〜６．５ｍｍであっても塗材表面を親水性に保持し、且つ長期に亘って該親水性を保持することで、結果として塗材表面に汚れの付着が少ない、外壁に意匠性を付与する水系塗材組成物を提供することにある。 The subject of the present invention is a one-component type, which retains the surface of the coating material hydrophilicly even when the coating film thickness is 0.5 to 6.5 mm, and retains the hydrophilicity for a long period of time. As a result, it is an object of the present invention to provide a water-based coating material composition that imparts designability to the outer wall with less adhesion of stains on the surface of the coating material.
本発明者らは、前記課題について鋭意検討し、請求項１記載の発明は、アクリル樹脂系エマルジョンと、光重合開始剤として１−ヒドロキシ−シクロヘキシル−フェニルケトンと、該光重合開始剤と共融する紫外線吸収剤としてベンゾフェノンと、表面親水化剤として分子量１００００以下のウレタン変性ポリエーテル化合物と、充填材と、骨材と、顔料と、増粘剤と、成膜助剤と、から成り、該光重合開始剤と該紫外線吸収剤とが共融混合物と成っており、該光重合開始剤は該アクリル樹脂系エマルジョンの固形分１００重量部に対して１．０〜４．０重量部であり、該表面親水化剤は該アクリル樹脂系エマルジョンの固形分１００重量部に対して７．５〜１５．０重量部であり、一液型で下地に０．５〜６．５ｍｍ厚に塗付することを特徴とする外壁に意匠性を付与する水系塗材組成物を提供する。
The present inventors have diligently studied the above-mentioned problems, and the invention according to claim 1 is a fusion of an acrylic resin emulsion, 1-hydroxy-cyclohexyl-phenylketone as a photopolymerization initiator, and the photopolymerization initiator. and benzophenone as an ultraviolet absorber to a urethane-modified polyether compound having a molecular weight of 10,000 or less as a surface hydrophilizing agent, and filler made of bone material, a pigment, a thickener, from a deposition aid, the and a photopolymerization initiator and the ultraviolet absorber comprises a eutectic mixture, the photoinitiator is an 1.0 to 4.0 parts by weight per 100 parts by weight of the solid content of the acrylic resin emulsion , the surface hydrophilizing agent is from 7.5 to 15.0 parts by weight based on 100 parts by weight of the solid content of the acrylic resin emulsion, coating with the 0.5~6.5mm thick base by one- Provided is a water-based coating material composition that imparts designability to an outer wall, which is characterized by the above.
請求項２記載の発明は、骨材が硅砂であることを特徴とする請求項１記載の外壁に意匠性を付与する水系塗材組成物を提供する。
The invention according to claim 2 provides a water-based coating material composition that imparts design to the outer wall according to claim 1 , wherein the aggregate is silica sand.
本発明の外壁に意匠性を付与する水系塗材組成物は、塗付膜厚が０．５〜６．５ｍｍであっても塗材表面が親水性に形成される効果があり、また長期に亘って該親水性が保持されるため、結果として塗材表面の汚れの付着が少ないという効果がある。 The water-based coating material composition that imparts design to the outer wall of the present invention has the effect of forming the coating material surface hydrophilic even when the coating film thickness is 0.5 to 6.5 mm, and also has a long-term effect. Since the hydrophilicity is maintained throughout, there is an effect that as a result, there is little adhesion of dirt on the surface of the coating material.
詳しくは、本願発明には表面親水化剤が配合されていて該表面親水化剤は塗材内の他の成分と結合されていないため少しずつ塗材表面に移行する効果がある。特に塗材が乾燥硬化する過程で該効果は発揮され、塗材表面は速やかに親水性に形成される効果がある。 Specifically, the present invention contains a surface hydrophilic agent, and since the surface hydrophilic agent is not bound to other components in the coating material, it has an effect of gradually migrating to the surface of the coating material. In particular, the effect is exhibited in the process of drying and curing the coating material, and the surface of the coating material is rapidly formed into hydrophilicity.
従来の塗材表面であれば該表面親水化剤は雨水等により洗い流されるため塗材表面の親水性は低下するが、本願発明においては光重合開始剤が紫外線吸収剤と共に配合されているため、光重合開始剤によりアクリル樹脂エマルジョン中で残存しているα、β―エチレン性不飽和単量体が重合し、塗材表面を緻密化し、表面親水化剤の流出が防止されると推察される。 On the surface of a conventional coating material, the surface hydrophilic agent is washed away by rainwater or the like, so that the hydrophilicity of the coating material surface is lowered. However, in the present invention, the photopolymerization initiator is blended together with the ultraviolet absorber. It is presumed that the photopolymerization initiator polymerizes the α and β-ethylenically unsaturated monomers remaining in the acrylic resin emulsion to densify the surface of the coating material and prevent the outflow of the surface hydrophilic agent. ..
光重合開始剤は紫外線吸収剤と共に配合されているため、紫外線は速やかに吸収されて該エネルギーにより光重合開始剤よりラジカルが放出されて前記α、β―エチレン性不飽和単量体がラジカル（付加）重合する。該作用は光エネルギーにより切断されるアクリル樹脂の再度の重合（修復）にも寄与する可能性があると推測される。 Since the photopolymerization initiator is blended together with the ultraviolet absorber, the ultraviolet rays are rapidly absorbed and radicals are released from the photopolymerization initiator by the energy, and the α, β-ethylenically unsaturated monomer becomes radicals ( Addition) Polymerize. It is speculated that this action may also contribute to the repolymerization (repair) of the acrylic resin that is cut by light energy.
該作用により塗材表面が緻密化することで、他の成分と結合されていない表面親水化剤の雨水等による流出が防止され、長期に亘って塗材表面の親水性が保持されると推測され、上記のように結果として塗材表面の汚れの付着が少ないという効果がある。 It is presumed that by densifying the surface of the coating material by this action, the outflow of the surface hydrophilic agent that is not bound to other components due to rainwater or the like is prevented, and the hydrophilicity of the surface of the coating material is maintained for a long period of time. As a result, there is an effect that dirt on the surface of the coating material is less likely to adhere.
以下、本発明について詳細に説明する。 Hereinafter, the present invention will be described in detail.
本発明の外壁に意匠性を付与する水系塗材組成物は、アクリル樹脂系エマルジョンと、光重合開始剤と、該光重合開始剤と共融する紫外線吸収剤と、表面親水化剤と、充填材と、骨材と、顔料と、増粘剤と、成膜助剤と、から成り、光重合開始剤はアクリル樹脂系エマルジョンの固形分１００重量部に対して１．０〜４．０重量部であり、表面親水化剤はアクリル樹脂系エマルジョンの固形分１００重量部に対して７．５〜１５．０重量部であり、一液型で下地に０．５〜６．５ｍｍ厚に塗付することを特徴とする外壁に意匠性を付与する水系塗材組成物であり、必要に応じて消泡剤や分散剤等を配合することが出来る。 The water-based coating material composition that imparts design to the outer wall of the present invention is filled with an acrylic resin-based emulsion, a photopolymerization initiator, an ultraviolet absorber that co-fusulates with the photopolymerization initiator, and a surface hydrophilic agent. It is composed of a material, an aggregate, a pigment, a thickener, and a film-forming aid, and the photopolymerization initiator is 1.0 to 4.0 weight by weight with respect to 100 parts by weight of the solid content of the acrylic resin emulsion. The surface hydrophilic agent is 7.5 to 15.0 parts by weight with respect to 100 parts by weight of the solid content of the acrylic resin emulsion, and is applied to the base with a thickness of 0.5 to 6.5 mm in a one-component type. It is a water-based coating material composition that imparts design to the outer wall, which is characterized by being attached, and an antifoaming agent, a dispersant, or the like can be blended as needed.
［アクリル樹脂エマルジョン］
本発明のアクリル樹脂系エマルジョンには、アクリル酸エステル系共重合樹脂、酢酸ビニル・アクリル酸エステル系共重合樹脂、シリコン変性アクリル樹脂等のアクリル樹脂系エマルジョンを使用することができる。アクリル樹脂とするアクリル系単量体としては、メチルアクリレート、エチルアクリレート、ｎ−プロピルアクリレート、イソプロピルアクリレート、ｎ−ブチルアクリレート、イソブチルアクリレート、ｓｅｃ−ブチルアクリレート、ｔ−ブチルアクリレート、ヘキシルアクリレート、２−エチルヘキシルアクリレート、オクチルアクリレート、ノニルアクリレート、デシルアクリレート、ドデシルアクリレート、ｎ−アミルアクリレート、イソアミルアクリレート、ラウリルアクリレート、ステアリルアクリレート、メチル(メタ)アクリレート、エチル(メタ)アクリレート、ｎ−プロピル(メタ)アクリレート、イソプロピル(メタ)アクリレート、ん−ブチル(メタ)アクリレート、イソブチル(メタ)アクリレート、ｓｅｃ−ブチル(メタ)アクリレート、ｔ−ブチル(メタ)アクリレート、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、ノニル(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、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、ラウリル(メタ)アクリレート、ステアリル(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、メトキシエチル(メタ)アクリレート、エトキシエチル(メタ)アクリレート、メトキシプロピル(メタ)アクリレート、エトキシプロピル(メタ)アクリレート、等を使用することが出来る。他の不飽和単量体としては、スチレン、α-メチルスチレン、クロロスチレン、ビニルトルエン、メトキシスチレン等のスチレン誘導体；(メタ)アクリル酸、フマル酸、マレイン酸、無水マレイン酸、イタコン酸、無水イタコン酸、及びクロトン酸等のカルボキシル基含有単量体；(メタ)アクリル酸や、クロトン酸、イタコン酸；２−ヒドロキシエチル(メタ)アクリレートや、２（３）−ヒドロキシプロピル(メタ)アクリレート、４−ヒドロキシブチルアクリレート、アリルアルコール、多価アルコールのモノ(メタ)アクリル酸エステル等の水酸基含有単量体；(メタ)アクリルアミドや、マレインアミド等のアミド基含有単量体；２−アミノエチル(メタ)アクリレートや、ジメチルアミノエチル(メタ)アクリレート、３−アミノプロピル(メタ)アクリレート、２−ブチルアミノエチル(メタ)アクリレート、ビニルピリジン等のアミノ基含有単量体；グリシジル(メタ)アクリレートや、アリルグリシジルエーテル、２個以上のグリシジル基を有するエポキシ化合物と活性水素原子を有するエチレン性不飽和単量体との反応により得られるエポキシ基含有単量体やオリゴノマー；ビニルトリメトキシシラン、ビニルトリエトキシシラン、ビニルメチルジメトキシシラン、ビニルメチルジエトキシシラン、３−（メタ)アクリロキシプロピルトリメトキシシラン、３−(メタ)アクリロキシプロピルトリエトキシシラン、２−(メタ)アクリロキシエチルトリメトキシシラン、２−(メタ)アクリロキシエチルトリエトキシシラン、３−(メタ)アクリロキシプロピルメチルジメトキシシラン、３−(メタ)アクリロキシプロピルメチルジエトキシシラン、３−(メタ)アクリロキシプロピルメチルジプロポキシシラン、３−(メタ)アクリロキシブチルフェニルジメトキシシラン、３−(メタ)アクリロキシプロピルジメチルメトキシシラン、及び３−(メタ)アクリロキシプロピルジエチルメトキシシラン等のアルコキシシリル基含有単量体；その他、酢酸ビニル、塩化ビニル、更には、エチレン、ブタジエン、アクリロニトリル、ジアルキルフマレート等を使用することが出来る。
[Acrylic resin emulsion]
As the acrylic resin-based emulsion of the present invention, an acrylic resin-based emulsion such as an acrylic acid ester-based copolymer resin, a vinyl acetate / acrylic acid ester-based copolymer resin, or a silicon-modified acrylic resin can be used. Examples of the acrylic monomer used as the acrylic resin include methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate, isobutyl acrylate, sec-butyl acrylate, t-butyl acrylate, hexyl acrylate, and 2-ethylhexyl. Acrylate, octyl acrylate, nonyl acrylate, decyl acrylate, dodecyl acrylate, n-amyl acrylate, isoamyl acrylate, lauryl acrylate, stearyl acrylate, methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl ( Meta) acrylate, N-butyl (meth) acrylate, Isobutyl (meth) acrylate, sec-butyl (meth) acrylate, t-butyl (meth) acrylate, hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, octyl (meth) Meta) acrylate, nonyl (meth) acrylate, decyl (meth) acrylate, dodecyl (meth) acrylate, n-amyl (meth) acrylate, isoamyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, cyclohexyl (meth) Meta) acrylate, phenyl (meth) acrylate, benzyl (meth) acrylate, methoxyethyl (meth) acrylate, ethoxyethyl (meth) acrylate, methoxypropyl (meth) acrylate, ethoxypropyl (meth) acrylate, etc. can be used. You can. Other unsaturated monomers include styrene derivatives such as styrene, α-methylstyrene, chlorostyrene, vinyltoluene, and methoxystyrene; (meth) acrylic acid, fumaric acid, maleic acid, maleic anhydride, itaconic acid, and anhydrous. Carboxyl group-containing monomers such as itaconic acid and crotonic acid; (meth) acrylic acid, crotonic acid, itaconic acid; 2-hydroxyethyl (meth) acrylate, 2 (3) -hydroxypropyl (meth) acrylate, Hydroxyl-containing monomers such as 4-hydroxybutyl acrylate, allyl alcohol, and mono (meth) acrylic acid esters of polyhydric alcohols; amide group-containing monomers such as (meth) acrylamide and maleeamide; 2-aminoethyl ( Amino group-containing monomers such as meta) acrylate, dimethylaminoethyl (meth) acrylate, 3-aminopropyl (meth) acrylate, 2-butylaminoethyl (meth) acrylate, vinylpyridine; glycidyl (meth) acrylate, Allyl glycidyl ether An epoxy group-containing monomer or oligonomer obtained by reacting an epoxy compound having two or more glycidyl groups with an ethylenically unsaturated monomer having an active hydrogen atom; vinyltrimethoxysilane, vinyltriethoxy. Silane, vinylmethyldimethoxysilane, vinylmethyldiethoxysilane, 3- (meth) acryloxypropyltrimethoxysilane, 3- (meth) acryloxipropyltriethoxysilane, 2- (meth) acryloxyethyltrimethoxysilane, 2 -(Meta) acryloxyethyltriethoxysilane, 3- (meth) acryloxipropylmethyldimethoxysilane, 3- (meth) acryloxipropylmethyldiethoxysilane, 3- (meth) acryloxipropylmethyldipropoxysilane, 3 An alkoxysilyl group-containing monomer such as − (meth) acryloxybutylphenyldimethoxysilane, 3- (meth) acryloxipropyldimethylmethoxysilane, and 3- (meth) acryloxipropyldiethylmethoxysilane; in addition, vinyl acetate, Vinyl chloride, and further, ethylene, butadiene, acrylonitrile, dialkyl fumarate and the like can be used.
アクリル樹脂系エマルジョン中の樹脂のガラス転移温度は−３０〜２０℃が好ましい。ガラス転移温度が−３０℃未満の場合は仕上がり表面にタックが生じて汚れやすくなり、２０℃超の場合は成膜不良となる。本発明の水系塗材組成物全体中の樹脂固形分は５．０〜２０．０重量％が好ましく、５．０重量％未満では粘着性、塗付作業性が低下し、また２０．０重量％超では粘度が低下し塗付作業性が低下すると共に表現できる意匠（パターン）数が低下する。市販のアクリル樹脂系エマルジョンとしては、アクロナールＰＳ７４３（ＢＡＳＦ社製、固形分５５重量％）がある。 The glass transition temperature of the resin in the acrylic resin emulsion is preferably -30 to 20 ° C. If the glass transition temperature is less than -30 ° C, the finished surface is tacked and easily soiled, and if it exceeds 20 ° C, film formation is poor. The resin solid content in the entire water-based coating material composition of the present invention is preferably 5.0 to 20.0% by weight, and if it is less than 5.0% by weight, the adhesiveness and coating workability are lowered, and 20.0% by weight. If it exceeds%, the viscosity decreases, the coating workability decreases, and the number of designs (patterns) that can be expressed decreases. As a commercially available acrylic resin emulsion, there is Acronal PS743 (manufactured by BASF, solid content 55% by weight).
［光重合開始剤］
本発明に使用する光重合開始剤は、本組成物を建築物の外壁に塗付し水分が揮発して乾燥した後、光によりアクリル樹脂系エマルジョン中の例えば未反応のα、β―エチレン性不飽和単量体を重合させる等の作用により塗材表面を緻密化することを目的に配合される。具体的にはα−ヒドロキシアルキルフェノン系光ラジカル重合開始剤が好ましく、特には１−ヒドロキシ−シクロヘキシル−フェニルケトンが好ましい。光重合開始剤の配合量は、本組成物中のアクリル樹脂系エマルジョンの固形分１００重量部に対して１．０〜４．０重量部が好ましく、１．０重量部未満では下記塗材表面にある表面親水化剤が雨水等により塗材表面より流出して塗材が汚れやすくなり、４．０重量部超では塗材表面の表面親水化剤が過剰量になり、逆に汚れが付着し易くなる場合がある。
[Photopolymerization initiator]
The photopolymerization initiator used in the present invention is, for example, unreacted α, β-ethylene property in an acrylic resin emulsion by applying the composition to the outer wall of a building, volatilizing moisture and drying. It is blended for the purpose of densifying the surface of the coating material by an action such as polymerizing an unsaturated monomer. Specifically, an α-hydroxyalkylphenone-based photoradical polymerization initiator is preferable, and 1-hydroxy-cyclohexyl-phenylketone is particularly preferable. The blending amount of the photopolymerization initiator is preferably 1.0 to 4.0 parts by weight with respect to 100 parts by weight of the solid content of the acrylic resin emulsion in the present composition, and less than 1.0 part by weight is the surface of the following coating material. The surface hydrophilic agent in the above is easily discharged from the surface of the coating material due to rainwater or the like, and the coating material is easily soiled. If the amount exceeds 4.0 parts by weight, the surface hydrophilic agent on the surface of the coating material becomes excessive and stains adhere to the surface. It may be easier to do.
［紫外線吸収剤］
本発明に使用する紫外線吸収剤は、上記光重合開始剤と共融する化学品が好ましく、具体的にはベンゾフェノンを使用することが出来る。使用に際しては光重合開始剤と共融混合物とした上で配合することが好ましく、共融混合物とすることで、光重合開始剤が組成物全体に均一に分散し効果的に光重合開始剤が作用する。共融混合物とする際の光重合開始剤と紫外線吸収剤の割合は３０／７０〜７０／３０が好ましく、該紫外線吸収剤の配合量は本組成物中のアクリル樹脂系エマルジョンの固形分１００重量部に対して１．０〜４．０重量部が好ましい。１．０重量部未満では光重合開始剤の活性化が不十分な場合があり、４．０重量部超では塗材表面に汚れが付着し易くなる場合がある。
[UV absorber]
The ultraviolet absorber used in the present invention is preferably a chemical product that is compatible with the above-mentioned photopolymerization initiator, and specifically, benzophenone can be used. When used, it is preferable to mix the photopolymerization initiator with a eutectic mixture, and by using the eutectic mixture, the photopolymerization initiator is uniformly dispersed throughout the composition and the photopolymerization initiator is effectively produced. It works. The ratio of the photopolymerization initiator and the ultraviolet absorber in the eutectic mixture is preferably 30/70 to 70/30, and the blending amount of the ultraviolet absorber is 100% by weight of the solid content of the acrylic resin emulsion in the present composition. It is preferably 1.0 to 4.0 parts by weight with respect to the part. If it is less than 1.0 part by weight, the activation of the photopolymerization initiator may be insufficient, and if it exceeds 4.0 parts by weight, stains may easily adhere to the surface of the coating material.
［表面親水化剤］
本発明に使用する表面親水化剤は、本組成物を建築物の外壁に塗付し水分が揮発して乾燥した後、塗材表面を親水化することを目的に配合され、特にはポリエーテルポリオールとイソシアネート化合物を反応させたウレタン変性ポリエーテル化合物が好ましい。該ウレタン変性ポリエーテル化合物の分子量は１００００以下であって水に可溶な化合物であり、本発明の組成物に配合することにより建築物の外壁に本組成物を塗付した際に塗材表面に移行し該塗材表面を親水化する。該表面親水化剤の配合量は、本組成物中のアクリル樹脂系エマルジョンの固形分１００重量部に対して７．５〜１５．０重量部が好ましく、７．５重量部未満では塗材表面の親水化が不十分となり、１５．０重量部超では塗材表面に汚れが付着し易くなる場合がある。
[Surface hydrophilic agent]
The surface hydrophilizing agent used in the present invention is formulated for the purpose of hydrophilizing the surface of the coating material after the composition is applied to the outer wall of a building and the moisture volatilizes and dries, and in particular, a polyether. A urethane-modified polyether compound obtained by reacting a polyol with an isocyanate compound is preferable. The urethane-modified polyether compound has a molecular weight of 10,000 or less and is soluble in water. By blending the urethane-modified polyether compound with the composition of the present invention, the surface of the coating material is applied when the composition is applied to the outer wall of a building. To make the surface of the coating material hydrophilic. The blending amount of the surface hydrophilic agent is preferably 7.5 to 15.0 parts by weight with respect to 100 parts by weight of the solid content of the acrylic resin emulsion in the present composition, and less than 7.5 parts by weight is the surface of the coating material. If it exceeds 15.0 parts by weight, dirt may easily adhere to the surface of the coating material.
［充填材］
本発明に使用する充填材は、平均粒径Ｄ５０（重量による積算５０％の粒径）が１００μｍ未満のものを言い、組成物の粘度や塗付性の調整を目的として配合し、重質炭酸カルシウム、クレー、カオリン、タルク、沈降性硫酸バリウム、炭酸バリウム、硅砂粉等が使用でき、重質炭酸カルシウムが安価でコスト的負担を軽減させることが出来る。充填材の配合量は塗材組成物全体に対して３〜２０重量％、好ましくは５〜１２重量％であり、３重量％未満では下地の色が透けるなどの隠蔽性が不足し、２０重量％超では塗材粘度が高くなって塗付作業性が不良となる。３重量％未満では色調によっては隠蔽性が低下する場合があり、１２重量％超では冬季等の低温度下では塗付作業性が低下する傾向にある。
[Filler]
The filler used in the present invention has an average particle size D 50 (particle size of 50% integrated by weight) of less than 100 μm, and is compounded for the purpose of adjusting the viscosity and coatability of the composition, and is heavy. Calcium carbonate, clay, kaolin, talc, precipitated barium sulfate, barium carbonate, silica sand powder, etc. can be used, and heavy calcium carbonate is inexpensive and can reduce the cost burden. The blending amount of the filler is 3 to 20% by weight, preferably 5 to 12% by weight, based on the entire coating material composition. If it exceeds%, the viscosity of the coating material becomes high and the coating workability becomes poor. If it is less than 3% by weight, the hiding property may decrease depending on the color tone, and if it exceeds 12% by weight, the coating workability tends to decrease under a low temperature such as winter.
［骨材］
本発明に使用する充填材は、平均粒径Ｄ５０（重量による積算５０％の粒径）が１００μｍ以上のものを言い、仕上がり表面に凹凸を付与することを目的として配合されるが、平均粒径が１００μｍ以上であればその粒子径は任意に選択することができ、例えば硅砂，ガラス，シリカ，タルク，重質炭酸カルシウムなどが使用可能である市販の平均粒径が２００μｍの重質炭酸カルシウムとしてはＫ−２５０（商品名，旭鉱末（株）製）がある。骨材（Ｂ）の配合量は組成物全体に対して４０〜６５重量％であり４０重量％未満では意匠性（塗材の凹凸感）が不足し、６５重量％超では作業性が低下する。
[aggregate]
The filler used in the present invention has an average particle size D 50 (particle size of 50% integrated by weight) of 100 μm or more, and is blended for the purpose of imparting unevenness to the finished surface. If the diameter is 100 μm or more, the particle size can be arbitrarily selected. For example, silica sand, glass, silica, talc, heavy calcium carbonate, etc. can be used. Commercially available heavy calcium carbonate having an average particle size of 200 μm. There is K-250 (trade name, manufactured by Asahi Kosou Co., Ltd.). The blending amount of the aggregate (B) is 40 to 65% by weight with respect to the entire composition, and if it is less than 40% by weight, the design (the unevenness of the coating material) is insufficient, and if it exceeds 65% by weight, the workability is lowered. ..
［顔料］
顔料には、酸化チタン、酸化亜鉛、カーボンブラック、酸化第二鉄（弁柄）、クロム酸鉛、黄鉛、黄色酸化鉄等の無機系顔料等が使用できるが、中でも酸化チタンは下地の隠蔽性に優れ、白色であるため主たる顔料として使用することが出来る。
[Pigment]
As the pigment, inorganic pigments such as titanium oxide, zinc oxide, carbon black, ferric oxide (valve handle), lead chromate, yellow lead, and yellow iron oxide can be used. Among them, titanium oxide conceals the base. Since it has excellent properties and is white, it can be used as a main pigment.
［増粘剤］
増粘剤は、鏝塗り作業性や保水性の向上を目的として配合し、水溶性セルロースエーテル、ウレタン変性ポリエーテル、ポリカルボン酸等が使用できる。水溶性セルロースエーテルとしてはｈｉメトローズ９０ＳＨ１５０００（信越化学株式会社製、商品名）がある。増粘剤の配合量は組成物全体１００重量部に対して０．１〜５．０重量部が好ましく、０．１重量部未満では十分な増粘効果が得られず塗材の凹凸模様が不十分となり、５．０重量部超では塗付作業性が低下する。
[Thickener]
The thickener is blended for the purpose of improving trowel coating workability and water retention, and water-soluble cellulose ether, urethane-modified polyether, polycarboxylic acid and the like can be used. As a water-soluble cellulose ether, there is hiMetro's 90SH15000 (manufactured by Shin-Etsu Chemical Co., Ltd., trade name). The blending amount of the thickener is preferably 0.1 to 5.0 parts by weight with respect to 100 parts by weight of the entire composition, and if it is less than 0.1 parts by weight, a sufficient thickening effect cannot be obtained and the uneven pattern of the coating material is formed. It becomes insufficient, and if it exceeds 5.0 parts by weight, the coating workability is lowered.
［成膜助剤］
成膜助剤には、エマルジョンのポリマー粒子の融着を促進し、ポリマーによる均一な皮膜を形成させることを目的で配合し、エチレングリコールジエチルエーテル、ベンジルアルコール、ブチルセロソルブ、エステルアルコール等を使用することが出来る。成膜助剤の配合量は組成物全体１００重量部に対して０．５〜１０重量部が好ましく、０．５重量部未満では低温での成膜が不十分となる場合があり、１０重量部超では塗材の表面に汚れが付着し易くなる場合がある。
[Film formation aid]
The film forming aid should be blended for the purpose of promoting the fusion of polymer particles of the emulsion and forming a uniform film by the polymer, and ethylene glycol diethyl ether, benzyl alcohol, butyl cellosolve, ester alcohol, etc. should be used. Can be done. The blending amount of the film forming aid is preferably 0.5 to 10 parts by weight with respect to 100 parts by weight of the entire composition, and if it is less than 0.5 parts by weight, film formation at a low temperature may be insufficient and 10 parts by weight. If it is over the part, dirt may easily adhere to the surface of the coating material.
上記の配合成分の他に、塗材中の巻き込み等による泡を消失させるために消泡剤や、充填材や顔料等を均一に分散させるための分散剤が配合されることがある。 In addition to the above-mentioned compounding components, a defoaming agent for eliminating bubbles due to entrainment in the coating material, and a dispersant for uniformly dispersing the filler, pigment, and the like may be blended.
本発明の水系塗材組成物は施工にあたっては、ローラー刷毛、パターンローラー、金鏝、吹き付けガン等を使用して、目的としている意匠となるように適切に施工器具を選択し、その意匠に適した塗付量で仕上げる。配合された水系塗材組成物の適正粘度としては、３００〜７００Ｐａ・ｓが好ましく、このような粘度とするには、適当量の水を加えることで調整することが出来る。 The water-based coating material composition of the present invention uses a roller brush, a pattern roller, a gold iron, a spray gun, etc., and appropriately selects a construction tool so as to achieve the desired design, and is suitable for the design. Finish with the amount of application. The appropriate viscosity of the blended water-based coating material composition is preferably 300 to 700 Pa · s, and such a viscosity can be adjusted by adding an appropriate amount of water.
また、本発明の水系塗材組成物の塗付厚みは０．５ｍｍ〜６．５ｍｍと一般的な塗料よりも厚く、上記ローラー刷毛、パターンローラー、金鏝、吹き付けガン等を使用して、目的とする意匠を付与する。 Further, the coating thickness of the water-based coating material composition of the present invention is 0.5 mm to 6.5 mm, which is thicker than that of general paints. The design is given.
以下、実施例及び比較例にて具体的に説明する。 Hereinafter, a specific description will be given with reference to Examples and Comparative Examples.
[材料の作製]
表１の配合に従って、実施例及び比較例１乃至比較例６の水系塗材組成物を作製した。表１において、アクリル樹脂エマルジョンはアクロナール７０６７（固形分：４７〜４９％、樹脂のガラス転移温度：１０℃、ＢＡＳＦ社製、商品名）を使用し、光重合開始剤は１−ヒドロキシ−シクロヘキシル−フェニルケトンを、紫外線吸収剤はベンゾフェノンを使用し、光重合開始剤と紫外線吸収剤は１：１（重量比）で共融混合物とした上で使用した。表面親水化剤は分子量１００００以下のウレタン変性ポリエーテル化合物 ＳＮクリーンアクト（商品名、サンノプコ社製）を使用し、充填剤は硅砂粉＃３００（平均粒径２５μｍ、株式会社トウチュウ製、商品名）を使用し、骨材は、東北硅砂７号（比重１．５、平均粒径１５０μｍ、東北硅砂株式会社製、商品名）を使用し、顔料には酸化チタンＲ−８２０（石原産業株式会社製、商品名）を使用し、増粘剤は水溶性セルロースエーテルｈiメトローズ９０ＳＨ−１５０００（信越化学株式会社製、商品名）を、成膜助剤はテキサノールＣＳ−１２（チッソ株式会社製、商品名）を使用した。この他には消泡剤及び分散剤を添加したが、これらは水系塗材用の市販品より適宜選択されるものを使用することが出来る。これらの原料を均一に混合分散させ、実施例及び比較例の外壁に意匠性を付与する水系塗材組成物とした。
[Making materials]
The water-based coating material compositions of Examples and Comparative Examples 1 to 6 were prepared according to the formulations shown in Table 1. In Table 1, acronal 7067 (solid content: 47 to 49%, resin glass transition temperature: 10 ° C., manufactured by BASF, trade name) was used as the acrylic resin emulsion, and the photopolymerization initiator was 1-hydroxy-cyclohexyl-. A phenyl ketone was used after using benzophenone as an ultraviolet absorber and a eutectic mixture of a photopolymerization initiator and an ultraviolet absorber at a ratio of 1: 1 (weight ratio). Urethane-modified polyether compound SN Clean Act (trade name, manufactured by Sannopco) with a molecular weight of 10,000 or less is used as the surface hydrophilic agent, and the filler is silica sand powder # 300 (average particle size 25 μm, manufactured by Tochu Co., Ltd., trade name). Tohoku silica sand No. 7 (specific gravity 1.5, average particle size 150 μm, manufactured by Tohoku silica sand Co., Ltd., trade name) is used as the aggregate, and titanium oxide R-820 (manufactured by Ishihara Sangyo Co., Ltd.) is used as the pigment. , Product name), the thickener is water-soluble cellulose ether hi Metros 90SH-15000 (manufactured by Shin-Etsu Chemical Co., Ltd., product name), and the film-forming aid is Texanol CS-12 (manufactured by Chisso Co., Ltd., product name). )It was used. In addition to this, an antifoaming agent and a dispersant were added, and those appropriately selected from commercially available products for water-based coating materials can be used. These raw materials were uniformly mixed and dispersed to obtain a water-based coating material composition that imparts design to the outer walls of Examples and Comparative Examples.
実施例及び比較例の水系塗材組成物について、以下に示す評価方法により評価した。 The water-based coating material compositions of Examples and Comparative Examples were evaluated by the evaluation methods shown below.
[評価方法] [Evaluation method]
［接触角］
ＪＩＳＡ５４３０規定のフレキシブルボード（１００ｍｍ×１５０ｍｍ×４ｍｍ）にシーラーとして溶剤型塩化ゴム系下塗り材（ＪＳ−４１０、アイカ工業株式会社製、商品名）を０．２ｋｇ／ｍ２塗布し、乾燥後、実施例及び比較例の水系塗材組成物を２．０ｋｇ／ｍ２塗布し、７日間乾燥させた。接触角計（協和界面科学株式会社 型番：Ｄｒｏｐ Ｍａｓｔｅｒ ＤＭ−３０１）を用い、液滴法にて１．０μＬの純水を塗材表面に滴下し、３０秒静置した後の接触角を測定した。測定は２３℃環境下で上記７日間乾燥後と、その後試験体を２４時間水中に浸漬し、さらに２４時間乾燥後にそれぞれ測定した。
[Contact angle]
Apply 0.2 kg / m 2 of solvent-based rubber chloride-based undercoat material (JS-410, manufactured by Aica Kogyo Co., Ltd., trade name) as a sealer to a flexible board (100 mm x 150 mm x 4 mm) specified by JIS A5430, and carry out after drying. The aqueous coating composition of Examples and Comparative Examples was applied at 2.0 kg / m 2 and dried for 7 days. Using a contact angle meter (Kyowa Interface Science Co., Ltd. model number: Drop Master DM-301), 1.0 μL of pure water was dropped onto the surface of the coating material by the sessile drop method, and the contact angle was measured after allowing to stand for 30 seconds. did. The measurement was carried out in an environment of 23 ° C. after drying for the above 7 days, and then the test piece was immersed in water for 24 hours and further dried for 24 hours.
［促進汚染性］
ＪＩＳＡ５４３０規定のフレキシブルボード（１００ｍｍ×１５０ｍｍ×４ｍｍ）にシーラーとして溶剤型塩化ゴム系下塗り材（ＪＳ−４１０、アイカ工業株式会社製、商品名）を０．２ｋｇ／ｍ２塗布し、乾燥後、実施例及び比較例の水系塗材組成物を０．５〜６．５ｍｍ厚みに塗布し、１日間乾燥させた。試験体にカーボンブラック（ＪＩＳ試験用粉体１２種カーボンブラック、粒子径約８０ｎｍ：日本粉体工業技術協会）を、茶漉しを用いて全面にふりかけ、その後、試験体を傾けて粉体を落とし霧吹きで全面に水を１０回噴射して流れ落とせるカーボンブラックは流れ落とした。その後試験体全体の汚染度合いを目視で評価し、カーボンブラックをふりかけないブランクの試験体と比較して僅かな汚れであるときを○と、同様に明らかな汚れがあるときを△と、同様に著しい汚れがあるときを×と評価した。試験は２３℃環境下で上記１日間乾燥後と、その後試験体を２４時間水中に浸漬し、さらに２４時間乾燥後にそれぞれ行なった。
[Promoted pollution]
Apply 0.2 kg / m 2 of solvent-based rubber chloride-based undercoat material (JS-410, manufactured by Aica Kogyo Co., Ltd., trade name) as a sealer to a flexible board (100 mm x 150 mm x 4 mm) specified by JIS A5430, and carry out after drying. The aqueous coating composition of Examples and Comparative Examples was applied to a thickness of 0.5 to 6.5 mm and dried for 1 day. Sprinkle carbon black (12 kinds of JIS test powder carbon black, particle size about 80 nm: Japan Powder Industry Technology Association) on the test piece using a tea strainer, and then tilt the test piece to drop the powder. The carbon black, which can be washed off by spraying water 10 times over the entire surface with a mist, has flowed off. After that, the degree of contamination of the entire test piece is visually evaluated, and when it is slightly dirty compared to the blank test piece which is not sprinkled with carbon black, it is marked with ○, and when it is clearly spotted, it is marked with △. When there was significant dirt, it was evaluated as x. The test was carried out in an environment of 23 ° C. after drying for the above 1 day, and then the test piece was immersed in water for 24 hours and further dried for 24 hours.
［耐汚染性］
下地としてＪＩＳＡ５４３０規定のフレキシブルボード（８０×２６５ｍｍ厚さ４ｍｍ）を使用し、シーラーとして溶剤型塩化ゴム系下塗り材（ＪＳ−４１０、アイカ工業株式会社製、商品名）を０．２ｋｇ／ｍ２塗布して、４時間以上乾燥させた後、実施例又は比較例の水系塗材組成物を塗付量０．９ｋｇ／ｍ２にて金鏝を使用して塗付し、温度２３℃湿度５０％ＲＨで１２時間養生した。その後同一の水系塗材組成物を塗付して、水系塗材組成物の塗付厚みが０．５〜６．５ｍｍになるように金鏝を使用して塗付し、同様に温度２３℃湿度５０％ＲＨで１４日間養生して試験体とした。試験体は２体づつ作製し、そのうちの一体を水平面に対して７０度の角度で縦長状に設置した。当該試験体の塗膜面の上部から高さ３００ｍｍの位置には、水平面に対して１０度の角度で設置された波板（波の幅３２ｍｍ、長さ５００ｍｍ）の下端部を配設させ、波板の波底部を流下してくる雨水が、試験体の塗膜上部に落下し、当該雨水が試験体の塗膜下部に自重で流下するようにした。この条件で３ヶ月間屋外に暴露し、雨水によって汚れた塗膜部分と、暴露していないもう一体の試験体塗膜との色差を色彩色差計（ＣＭ−２６００ｄ、コニカミノルタセンシング株式会社製）にて測定し、当該色差を耐汚染性として評価した。色差が２．５未満を○、２．５以上を×とした。
[Stain resistance]
A flexible board (80 x 265 mm, thickness 4 mm) specified by JIS A5430 is used as a base, and a solvent-based rubber chloride-based undercoat material (JS-410, manufactured by Aika Kogyo Co., Ltd., trade name) is applied as a sealer at 0.2 kg / m 2. Then, after drying for 4 hours or more, the water-based coating material composition of the example or the comparative example was applied with a coating amount of 0.9 kg / m 2 using a gold trowel, and the temperature was 23 ° C. and the humidity was 50%. It was cured in RH for 12 hours. After that, the same water-based coating material composition is applied, and the water-based coating material composition is applied using a gold trowel so that the coating thickness becomes 0.5 to 6.5 mm, and similarly, the temperature is 23 ° C. The test piece was cured at a humidity of 50% RH for 14 days. Two test pieces were prepared, and one of them was installed vertically at an angle of 70 degrees with respect to the horizontal plane. At a position 300 mm in height from the upper part of the coating film surface of the test piece, the lower end portion of a corrugated plate (wave width 32 mm, length 500 mm) installed at an angle of 10 degrees with respect to the horizontal plane is arranged. The rainwater flowing down the wave bottom of the corrugated sheet fell onto the upper part of the coating film of the test piece, and the rainwater flowed down to the lower part of the coating film of the test piece by its own weight. Color difference meter (CM-2600d, manufactured by Konica Minolta Sensing Co., Ltd.) measures the color difference between the coating film part that has been exposed to the outdoors for 3 months under these conditions and has been contaminated by rainwater and another unexposed specimen coating film. The color difference was evaluated as stain resistance. A color difference of less than 2.5 was evaluated as ◯, and a color difference of 2.5 or more was evaluated as x.
［意匠性］
９００ｍｍ角のＪＩＳＡ５４３０規定のフレキシブルボードを垂直に設置し、実施例又は比較例の水系塗材組成物を剣先ゴテで凹凸の差を付けながら塗付厚みが０．５〜６．５ｍｍと成るようにして扇型の柄をつけ、そのまま乾燥させる。硬化後、つけた柄がそのままの状態を保っているものを○、柄に崩れ（ダレ、レベリング）がある場合は×とした。
[Creativity]
A 900 mm square flexible board specified by JIS A5430 is installed vertically, and the water-based coating material composition of the example or comparative example is applied with a sword tip iron so that the coating thickness becomes 0.5 to 6.5 mm while making a difference in unevenness. Attach a fan-shaped handle and let it dry as it is. After curing, those with the attached handle kept as they were were marked with ◯, and those with the handle collapsed (sagging, leveling) were marked with x.
［成膜性（低温ひび割れ性）］
１５０×１５０ｍｍ厚さ２ｍｍのガラス板の周縁に厚さ２ｍｍ×幅７ｍｍのスペーサーを貼り付け、その内側に実施例又は比較例の水系塗材組成物を均一な厚みになるようにヘラで塗付し、直ちに５℃の恒温槽内に水平に載置した。４８時間経過後、恒温槽から取り出し目視にて、塗膜表面にクラックが生じているものを×とし、クラックが無いものを○とした。
[Film film property (low temperature crack property)]
A spacer having a thickness of 2 mm and a width of 7 mm is attached to the periphery of a glass plate having a thickness of 150 × 150 mm and a thickness of 2 mm, and the water-based coating material composition of the example or comparative example is applied to the inside with a spatula so as to have a uniform thickness. Then, it was immediately placed horizontally in a constant temperature bath at 5 ° C. After 48 hours had passed, the film was taken out of the constant temperature bath and visually inspected, and those having cracks on the coating film surface were marked with x, and those without cracks were marked with ◯.
［耐水性］
１５０×１５０×４ｍｍのフレキシブルボード（ＪＩＳ Ａ５４３０規定のフレキシブルボード）を使用し、シーラーとして溶剤塩化ゴム系下塗り材（ＪＳ−４１０、アイカ工業株式会社製、商品名）を０．２ｋｇ／ｍ２塗布して、４時間以上乾燥させた後、実施例又は比較例の水系塗材組成物を塗付量０．９ｋｇ／ｍ２にて金鏝を使用して塗付し、温度２３℃湿度５０％ＲＨで１２時間養生した。その後同一の水系塗材組成物を塗付して、水系塗材組成物の塗付厚みが０．５〜６．５ｍｍになるように金鏝を使用して塗付し、同様に２３℃湿度５０％ＲＨで１日間養生して試験体とした。養生後２３℃の水に浸漬し、２４時間経過後の表面の膨れ、軟化を目視及び指蝕で評価した。膨れ、軟化がない場合は○、これ以外は×とした。
[water resistant]
Using a flexible board of 150 x 150 x 4 mm (flexible board specified by JIS A5430), apply 0.2 kg / m 2 of solvent chloride rubber undercoat material (JS-410, manufactured by Aika Kogyo Co., Ltd., trade name) as a sealer. Then, after drying for 4 hours or more, the water-based coating material composition of the example or the comparative example was applied with a coating amount of 0.9 kg / m 2 using a gold trowel, and the temperature was 23 ° C. and the humidity was 50%. It was cured in RH for 12 hours. After that, the same water-based coating material composition is applied, and the water-based coating material composition is applied using a gold trowel so that the coating thickness becomes 0.5 to 6.5 mm, and similarly, the humidity at 23 ° C. The test piece was cured at 50% RH for 1 day. After curing, it was immersed in water at 23 ° C., and the swelling and softening of the surface after 24 hours were evaluated visually and by finger erosion. If there was no swelling or softening, it was marked as ◯, otherwise it was marked as x.
［耐膨れ性］
ＪＩＳ Ａ ６９０９に準拠した方法で試験体を作製した。先ず７０×７０×２０ｍｍモルタルピースにシーラーとして水系アクリル下塗り材（ＪＳ−５００、アイカ工業株式会社製、商品名）を０．２ｋｇ／ｍ２塗布して、４時間以上乾燥させた後、実施例又は比較例の水系塗材組成物を塗付量０．９ｋｇ／ｍ２にて金鏝を使用して塗付し、温度２３℃湿度５０％ＲＨで１２時間養生した。その後同一の水系塗材組成物を塗付して、水系塗材組成物の塗付厚みが０．５〜６．５ｍｍになるように金鏝を使用して塗付し、同様に温度２３℃湿度５０％ＲＨで１４日間養生して試験体とした。当該試験体を、温度２３℃１８ｈ水浸漬→−２０℃３ｈ→５０℃３ｈの温冷繰り返し試験を１０サイクル行い、塗材表面の膨れの有無を目視にて確認した。膨れが発生した場合は×、膨れの発生がない場合は○とした。
[Swelling resistance]
Specimens were prepared by a method conforming to JIS A 6909. First, 0.2 kg / m 2 of a water-based acrylic undercoat material (JS-500, manufactured by Aika Kogyo Co., Ltd., trade name) was applied to a 70 × 70 × 20 mm mortar piece as a sealer, and dried for 4 hours or more. Alternatively, the water-based coating material composition of Comparative Example was applied at an application amount of 0.9 kg / m 2 using a gold trowel, and cured at a temperature of 23 ° C. and a humidity of 50% RH for 12 hours. After that, the same water-based coating material composition is applied, and the water-based coating material composition is applied using a gold trowel so that the coating thickness becomes 0.5 to 6.5 mm, and similarly, the temperature is 23 ° C. The test piece was cured at a humidity of 50% RH for 14 days. The test piece was immersed in water at a temperature of 23 ° C. for 18 hours → -20 ° C. for 3h → 50 ° C. for 3h for 10 cycles, and the presence or absence of swelling on the surface of the coating material was visually confirmed. When swelling occurred, it was evaluated as x, and when swelling did not occur, it was evaluated as ◯.
［評価結果］ [Evaluation results]
評価結果を表２に示す。 The evaluation results are shown in Table 2.
Claims (2)
The water-based coating material composition for imparting design to the outer wall according to claim 1, wherein the aggregate is silica sand.
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