JP4394370B2 - Paint composition for interior material and painted interior material - Google Patents
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Description
【０００１】
【発明の属する技術分野】
この発明は、微粉末炭と無機バインダーとの混練物を焼成して得られた多孔性焼成物を含み、建築用内装材、車両用内装材、家具や日用品等の調度品用材料等の人間の生活空間で用いられる種々の内装材や調度品等（以下、総称して「内装材」という）に適用でき、特に有害物質吸着性や消臭性等の吸着性能に優れた内装材用塗料組成物、及び、この内装材用塗料組成物を塗布して得られ、人間の生活空間で用いられる塗装内装材に関する。
【０００２】
【従来の技術】
【特許文献１】
特開平8-48,917号公報
【特許文献２】
特開平9-194,765号公報
【特許文献３】
特開平10-140,045号公報
【特許文献４】
特開2000-95,980号公報
【特許文献５】
特開2002-317,143号公報
【特許文献６】
特開平11-29,742号公報
【特許文献７】
特開2000-319,587号公報
【特許文献８】
特開2002-167,287号公報
【特許文献９】
特開2002-179,980号公報
【特許文献１０】
特開2002-302,635号公報
【特許文献１１】
登録実用新案第3,085,790号公報
【０００３】
近年、一般住宅、オフィスビル、劇場や映画館、デパート等の建築物や、自動車や電車等の車両等における冷暖房設備が充実し、これらの生活空間においてはその冷暖房効果を高めるために従来に比べて気密性が高められている。このため、風通しや換気の悪い部分での結露やカビの発生が問題になったり、あるいは、壁材、天井材、間仕切り材、壁クロス材等の建築用内装材や、自動車や電車等の乗り物の車室内で用いられる車両用内装材や、屋内や車室内等に配置される家具や日用品等の調度品用材料等、人間の生活空間で用いられる種々の内装材や調度品等（内装材）から揮発されるホルムアルデヒド等の有害物質によるシックハウス症候群等が社会問題となっている。
【０００４】
そこで、塗料業界においても、このような結露やカビの発生、更には有害物質に対する対策として、例えば、抗菌剤として銀系抗菌剤を配合した塗料組成物（特開平8-48,917号公報、特開平9-194,765号公報を参照）、化学吸着剤としてアミン化合物等を配合した塗料組成物（特開平10-140,045号公報参照）、消臭剤としてゼオライト等を配合した消臭塗料組成物（特開2000-95,980号公報参照）、調湿剤として珪藻土を配合した塗料組成物（特開2002-317,143号公報参照）等が提案されている。
【０００５】
しかるに、銀系抗菌剤は抗菌性には優れているものの結露防止や有害物質吸着性や消臭性等の吸着性能等に問題があり、化学吸着剤としてのアミン化合物等の使用にはアミン化合物等それ自体が感作性物質であるほか、吸着飽和量や結露防止等の点で問題があり、消臭剤としてのゼオライト等の使用には塗料組成物の貯蔵安定性や吸着飽和量等の点で問題があり、また、調湿剤としての珪藻土の使用にはコテ塗りによる厚膜仕様でないと調湿効果が発揮されず割れ易いほか、消臭効果は期待できないという問題がある。
【０００６】
そこで、従来においても、このような問題を解決するために、塗料組成物中に種々の炭成分（白炭、黒炭、竹炭、備長炭、米糠炭、ヤシガラ炭、食料残渣炭、磁気カード炭、活性炭等）を単独であるいは麦飯石等の他の成分と共に配合し、塗料にこの炭成分のもつ吸着性能等の機能性を付与する試みが行われており、例えば、樹脂成分として、透湿性を有するポリアミド樹脂を用いたもの（特開平11-29,742号公報や特開2000-319,587号公報）、セルロース系樹脂を用いたもの（特開2002-179,980号公報）、透湿性のアクリルエマルジョン樹脂を用いたもの（特開2002-302,635号公報）、ポリビニルアルコールを用いたもの（登録実用新案第3,085,790号公報）等が提案されている。
【０００７】
しかしながら、従来の炭成分を配合した塗料組成物においては、配合される炭成分が基本的に黒色であるため、この炭成分を配合した塗料はその外観が黒色にならざるを得ず、このために押入や床下等の人目につかなくて意匠効果を施す必要の無い箇所での使用か、表面に現れない下地調整材としての使用等に限られ、しかも、内装材用として用いる塗料としてはその基本性能（例えば、塗膜の外観、付着性、不粘着乾燥性、耐水性、結露防止性、貯蔵安定性等）においても種々の問題があった。
【０００８】
すなわち、樹脂成分として透湿性を有するポリアミド樹脂を用いた場合には、有機溶剤を多く含み、塗装内装材としては好ましくなく、また、コロイダルシリカを含有する透湿性のアクリルエマルジョン樹脂を用いた場合には、炭成分の混和性が悪く分散不良になり易く、塗膜の外観不良や耐汚染性の低下、沈澱による貯蔵安定性不良という問題があり、いずれも内装材用の塗料組成物としては必ずしも満足のいくものではない。また、樹脂成分としてセルロース系樹脂やポリビニルアルコールを用いた場合も、形成される塗膜の耐水性・付着性が不充分であって、塗装内装材として使用する場合、塗装後の塗膜の剥がれ、洗浄による塗膜の溶出・フクレという問題があり内装材用の塗料組成物としては適当でない。
【０００９】
また、特開2002-167,287号公報には、粉末状炭７０〜９０重量部と粘土１０〜３０重量部との混練物を成形し、得られた成形体を焼成して実質的に白色の多孔性焼成物を調製し、この多孔性焼成物を２００メッシュ以上に粉砕して得られた多孔性焼成物の粉末を、単独であるいは竹炭等の炭粉末と共に、フェノール樹脂系塗料やポリビニルアルコール（具体的には、日本合成社製商品名「ゴーセノール」）の１００重量部中に１０〜３０重量部の割合で配合し、容易に任意の色調に調製して使用できる天井、壁、サッシ等の内装材用の塗料とすることが提案されている。
【００１０】
しかしながら、この多孔性焼成物を配合した塗料組成物においても、樹脂成分としてフェノール樹脂系塗料を使用した場合には、熱硬化性であるために、塗装内装材として使用する場合、現場塗装でなく工場塗装仕様にならざるをえず、塗装内装材として一般に使用できないという問題があり、また、樹脂成分としてポリビニルアルコールを使用した場合には、形成される塗膜の耐水性・付着性が不充分であって、塗装内装材として使用する場合、塗装後の塗膜の剥がれ、洗浄による塗膜の溶出・フクレという問題があり、上記種々の炭成分を配合した塗料組成物と同様に内装材用として用いる塗料としてはその基本性能において重大な問題があった。
【００１１】
【発明が解決しようとする課題】
そこで、本発明者らは、上述した炭成分や多孔性焼成物を用いた種々の塗料組成物におけるような問題が無く、しかも、有害物質吸着性や消臭性等の吸着性能に優れているだけでなく、内装材用塗料としての基本的性能、特に塗膜の外観、不粘着乾燥性、耐水性、結露防止性、及び貯蔵安定性等においても優れた性能を有する内装材用塗料組成物について鋭意検討した結果、樹脂成分として最低造膜温度−５℃以上２０℃未満である非透湿性水系エマルジョン樹脂を用い、これに上記特開2002-167,287号公報記載の所定の多孔性焼成物を所定の割合で配合することにより、内装材用塗料として優れた基本性能を備え、しかも、有害物質吸着性や消臭性等の吸着性能に優れた内装材用塗料組成物を開発することができ、本発明に到達した。
【００１２】
従って、本発明の目的は、単に内装材用塗料として優れた基本性能を備えているだけでなく、有害物質吸着性や消臭性等の吸着性能においても優れた性能を有する内装材用塗料組成物を提供することにある。
また、本発明の他の目的は、このような内装材用塗料組成物を内装用基材に塗布して得られ、内装材用の塗膜としてその基本性能に優れているだけでなく、有害物質吸着性や消臭性等の吸着性能においても優れている塗装内装材を提供することにある。
【００１３】
【課題を解決するための手段】
すなわち、本発明は、最低造膜温度−５℃以上２０℃未満である非透湿性水系エマルジョン樹脂と、微粉末炭と無機バインダーとの混練物を焼成して得られ、平均粒子径０．５ｍｍ以下で実質的に白色の多孔性焼成物とを含み、塗料組成物中に上記多孔性焼成物が１０〜４０重量％の割合で配合されていると共に揮発性有機化合物の含有量が１重量％以下であり、
前記非透湿性水系エマルジョン樹脂が、アクリル系エマルジョン樹脂又は酢酸ビニル系エマルジョン樹脂であることを特徴とする内装材用塗料組成物である。
【００１４】
また、本発明は、このような内装材用塗料組成物を内装用基材に塗布して得られる塗装内装材である。
【００１５】
本発明において使用する樹脂成分は、最低造膜温度が−５℃以上２０℃未満、好ましくは０℃以上１０℃以下である非透湿性の水系エマルジョン樹脂である必要がある。この樹脂成分の透湿性が高いと形成される塗膜の耐水性が低下するという問題が生じ、また、この樹脂成分が水系エマルジョン樹脂以外の塗料樹脂であると有機溶剤を多く含む、ホルムアルデヒドを放出する等のことから、内装材用として好ましくなく、いずれの場合も内装材用として用いた際にその基本性能のいずれかにおいて所望の性能を発揮し得ない。また、最低造膜温度が−５℃より低いと、得られた塗膜に粘着感が生じてしまい、反対に、２０℃以上であると乾燥後の塗膜に割れが生じ易くなる。
【００１６】
このような非透湿性の水系エマルジョン樹脂として、本発明においては、アクリル系エマルジョン樹脂又は酢酸ビニル系エマルジョン樹脂が用いられ、これらはそのいずれかを単独で用いることができるほか、両方を混合して用いることもできる。これらの非透湿性水系エマルジョン樹脂は、塗料・塗装時の臭気という観点からも好ましい。
【００１７】
ここで、本発明において「非透湿性」とはJIS Z 0208の透湿性の評価で透湿量１００g/m2・24h以下のものをいい、もし使用する樹脂成分が透湿性であると、内装材用の塗料として用いた場合に、所望の耐水性を得ることができない。水系エマルジョン樹脂に透湿性を付与するには、コロイダルシリカやプラスチックビーズ、セラミック等を配合して透湿性を出す手法があるが、得られた塗膜の耐水性と透湿性を維持することが難しく、また、多孔性焼成物の混和性が悪く分散不良になり易く、塗膜の外観不良や耐汚染性の低下、沈澱による貯蔵安定性不良という問題が生じる。また、「水系エマルジョン樹脂」とは、塗料樹脂が水中に所定の固形分濃度で分散した状態のものをいい、水系エマルジョン樹脂でない、例えばアクリル樹脂、ポリアミド樹脂、フェノール樹脂等のような溶剤型樹脂を内装材用の塗料として用いた場合には、室内に有機溶剤を放出するという問題が生じる。
【００１８】
上記非透湿性水系エマルジョン樹脂に配合される多孔性焼成物については、微粉末炭と無機バインダーとの混練物を焼成して得られ、平均粒子径０．５mm以下、好ましくは０．１mm以下であって、実質的に白色であること、好ましくは白色度（Ｙ値）５５以上、より好ましくは６０以上であることが必要である。多孔性焼成物の平均粒子径が０．５mmを超えると、塗布して形成される塗膜の表面状態が粗くなって汚れ易く好ましくないほか、吸油量が高く製造時の塗料粘度が高くなり塗装作業性が低下するという問題が生じる。また、多孔性焼成物が実質的に白色でないと得られた塗膜も白色でなく、室内の色調に合わせた淡彩色を調色できないという問題が生じ、白色度が高いと好みの淡彩色を自由に調色できるという利点がある。
【００１９】
また、上記多孔性焼成物については、その比表面積が４００〜８００m2/g、好ましくは５００〜７００m2/gであるのがよく、比表面積が４００m2/gより小さいと有害物質吸着性が不充分という問題が生じ、反対に、８００m2/gより大きくなると塗料中の水分を吸収して貯蔵中に塗料粘度が上昇し貯蔵安安定性に欠けるという問題が生じる。
【００２０】
ここで、上記多孔性焼成物については、微粉末炭と無機バインダーとの混練物を焼成して得られたものであればよく、例えば、上記の特開2002-167,287号公報に記載の方法により製造することができる。
【００２１】
この多孔性焼成物の製造に用いられる微粉末炭については、種々の炭の微粉末、例えば、木炭、竹炭、パーム炭、貝殻炭等を平均粒径０．０５〜０．５mmの大きさに粉砕したものを挙げることができ、これらはその１種のみを単独で使用することができるほか、２種以上を混合して用いることもできる。これらの炭のうち、特に竹炭は、有機物質吸着性という観点から好ましいものである。また、無機バインダーとしては、例えば、磁器土、蛙目粘土、ロウ石、カオリン、クレー等の粘土や珪藻土、タルク等の天然無機原料を挙げることができ、多孔性焼成物の焼成時の酸素調整という観点から好ましくは磁器土である。
【００２２】
上記微粉末炭と無機バインダーとの混練物を調製するに当って、微粉末炭と無機バインダーとの配合割合は、使用する微粉末炭や無機バインダーの種類等によっても異なるが、通常、微粉末炭が７０〜９０重量部、好ましくは７０〜８０重量部であって、無機バインダーが無水物として１０〜３０重量部、好ましくは２０〜３０重量部であるのがよい。
【００２３】
また、上記微粉末炭と無機バインダーとの混練物は、無機バインダー中に水分が含まれている場合にはその水分含有量も考慮して、好ましくは焼成する上で適当な成形体を形成し得る量の水分量（特に制限は無いが、通常は混練物中１５〜４０重量%程度の水分量）となるように、微粉末炭、無機バインダー及び水を混合し、真空混練機等の適当な混練手段を用いて十分に混練することにより調製される。
【００２４】
このようにして得られた混練物については、特に成形することなくそのまま焼成してもよいが、好ましくは球状、板状、棒状等の焼成する上で適当な形状の成形体に成形し、次いで得られた成形体を６００〜１５００℃の温度で焼成する。この混練物（成形体）の焼成に際しては、好ましくは、先ずこの混練物（成形体）を６００〜１,０００℃で一次焼成した後、必要により一旦冷却し又は冷却することなく引き続き、１，０００〜１,５００℃で二次焼成するのがよく、このように２段階の焼成を行うことにより、原料として用いる炭成分の特性、特に吸着特性を生かしつつ得られる多孔性焼成物のより高度の白色化を図ることができる。得られた焼成物は、平均粒子径０．５mm以下にまで粉砕されて多孔性焼成物として用いられる。
【００２５】
なお、上記多孔性焼成物を調整するのに際しては、調湿性を補助する目的で粉末状麦飯石を、マイナスイオン発生、遠赤外線の放出等の目的で粉末状トルマリンを、着色と隠ぺい性付与等の目的で粉末状酸化チタンを、消臭性、調湿性を高める目的で陶微粉を、それぞれ必要な範囲で適宜添加してもよい。
【００２６】
そして、このような多孔性焼成物の塗料組成物中への配合割合は、通常１０〜４０重量％、好ましくは２０〜４０重量％の範囲であり、配合割合が１０重量％より少ないと、形成される塗膜に所望の隠ぺい性、吸着性能、調湿性等を付与することが難しく、反対に、４０重量％より多くなると、得られた塗料組成物の貯蔵安定性が低下する。
【００２７】
本発明においては、塗料組成物中の揮発性有機化合物の含有量が１重量%以下、好ましくは０．５重量%以下である必要がある。揮発性有機化合物の含有量が１重量%を超えると、室内環境への影響という観点から好ましくない。ここで、「揮発性有機化合物」とは、例えば塗料組成物中の添加剤として用いる造膜助剤、凍結防止剤等に使用される有機溶剤であって、室内環境への影響の大きい沸点２５０℃以下の有機化合物をいう。本発明においては、塗料組成物中の揮発性有機化合物の含有量が１重量%以下とするために、沸点２５０℃以下の造膜助剤や揮発性有機化合物を含まない添加剤を選択した。
【００２８】
なお、本発明において、塗料組成物には、上記した非透湿性水系エマルジョン樹脂及び多孔性焼成物以外に、必要により、一般に塗料組成物中に添加される添加剤、例えば顔料、分散剤、消泡剤、増粘剤、防腐剤、造膜助剤、凍結防止剤等を必要な範囲で添加してもよい。
【００２９】
本発明の塗料組成物は、水系エマルション樹脂をベースとする水性塗料組成物であり、従来の内装材用に用いられていた樹脂組成物と同様に、一般住宅、オフィスビル、劇場や映画館、デパート等の建築物で用いられる壁材、天井材、間仕切り材、壁クロス材等の内装材や、自動車や電車等の乗り物の車室内で用いられる車両用内装材や、屋内や車室内等に配置される家具や日用品等の調度品用材料等、人間の生活空間で用いられる種々の内装材や調度品等（内装材）の用途に好適に用いることができる。
【００３０】
【発明の実施の形態】
以下、実施例及び比較例に基づいて、本発明の好適な実施の形態を具体的に説明する。
【００３１】
〔実施例１〜１２及び比較例１〜８〕
非透湿性水系エマルジョン樹脂として、下記のものを使用した。
樹脂(1)：最低造膜温度０℃の非透湿性水系アクリル系共重合エマルジョン樹脂（日本NSC社製商品名：ヨドゾールAD125、固形分濃度48重量%）
樹脂(2)：最低造膜温度１６℃の非透湿性水系酢酸ビニル系共重合エマルジョン樹脂（大日本インキ工業社製商品名：ボンコート2310、固形分濃度50重量%）
樹脂(3)：最低造膜温度−２℃の非透湿性水系スチレン／アクリル系共重合エマルジョン樹脂（大日本インキ工業社製商品名：ボンコートVF-1010、固形分濃度50重量%）
樹脂(4)：最低造膜温度１３℃の非透湿性水系アクリル系共重合エマルジョン樹脂（クラリアントジャパン社製商品名：モビニール792、固形分濃度50重量%）
【００３２】
樹脂(5)：最低造膜温度−７℃の非透湿性水系スチレン／アクリル系共重合エマルジョン樹脂（ガンツ化成社製商品名：ウルトラゾールD-32、固形分濃度55重量%）
樹脂(6)：最低造膜温度２３℃の非透湿性水系アクリル系共重合エマルジョン樹脂（日本触媒社製商品名：アクリセットEMN193E、固形分濃度54重量%）
樹脂(7)：最低造膜温度０℃の透湿性水系アクリル系共重合エマルジョン樹脂（日本NSC社製商品名：ヨドゾールAD75C、固形分濃度51重量%）
樹脂(8)：最低造膜温度１５℃の透湿性水系アクリル系共重合エマルジョン樹脂（クラリアントジャパン社製商品名：モビニール8020、固形分濃度43重量%）
【００３３】
また、微粉末炭として平均粒径０．０５mmの竹炭４０重量部及び貝殻炭５重量部を用い、無機バインダーとして水分含有量０．５重量%の粘土１０重量部を用い、更に平均粒径０．０５mmの麦飯石５重量部と平均粒径０．０５mmの陶微粉４０重量部とを添加し、混練して下記の条件で焼成し、粉砕して下記の焼成物(1)〜(9)を調整し、多孔性焼成物として用いた。また、得られた各焼成物(1)〜(9)について、測色色差計としてJIS K 8722に規定する装置（日本電色色差計）を用い、Ｙ値（白色度）を測定した。
【００３４】
焼成物(1)：焼成：６００℃１０時間→室温冷却→１，０００℃１８時間
粉砕後平均粒径：０．０５mm、白色度（Ｙ値）：６０．３８
焼成物(2)：焼成：８００℃１０時間→室温冷却→１，５００℃１８時間
粉砕後平均粒径：０．５mm、白色度（Ｙ値）：５８．４３
焼成物(3)：焼成：８００℃１０時間→室温冷却→１，０００℃１８時間
粉砕後平均粒径：０．１mm、白色度（Ｙ値）：６２．１７
焼成物(4)：焼成：８００℃１０時間→室温冷却→１，５００℃１８時間
粉砕後平均粒径：０．０５mm、白色度（Ｙ値）：６０．０５
焼成物(5)：焼成：８００℃１８時間
粉砕後平均粒径：０．０５mm、白色度（Ｙ値）：５０．３８
【００３５】
焼成物(6)：焼成：１，４００℃１８時間
粉砕後平均粒径：０．０５mm、白色度（Ｙ値）：５８．４３
焼成物(7)：焼成：５００℃１０時間→室温冷却→１，０００℃１８時間
粉砕後平均粒径：０．０５mm、白色度（Ｙ値）：４９．１７
焼成物(8)：焼成：８００℃１０時間→室温冷却→１，６００℃１８時間
粉砕後平均粒径：０．１mm、白色度（Ｙ値）：６０．０５
焼成物(9)：焼成：８００℃１０時間→室温冷却→１，５００℃１８時間
粉砕後平均粒径：１．０mm、白色度（Ｙ値）：５０．０５
【００３６】
更に、分散剤としてポリカルボン酸ナトリウム塩（ローム・アンド・ハース社製商品名：オロタン731SD）を、湿潤剤としてノニオン性界面活性剤（日本乳化剤社製商品名：ニューコール565FH）を、増粘剤としてヒドロキシエチルセルロース系増粘剤（ユニオンカーバイト社製商品名：セロサイズQP4400）を、消泡剤として鉱物油とノニオン界面活性剤の配合物（サンノプコ社製商品名：SNデフォーマー370）を、防腐防カビ剤としてチアベンダゾール（三愛石油社製商品名：サンアイゾール100）を、防錆剤として亜硝酸ソーダ（三菱化学社製）を、また、造膜助剤として2,2,4-トリメチル-1,3-ペンタジオールイソブチレート (協和発酵工業社製商品名：キョーワノールD)をそれぞれ用いた。
【００３７】
上記の各成分を常法により表１に示す割合（重量％）で配合して実施例１〜１２の塗料組成物を調製すると共に、上記の各成分を常法により表２に示す割合（重量％）で配合して比較例１〜８の塗料組成物を調製した。
【００３８】
【表１】
【表２】
このようにして得られた各実施例１〜１２及び比較例１〜８の塗料組成物について、それぞれ下記に示す方法で塗膜の外観、塗膜の白色度、付着性、不粘着乾燥性、耐水性、抗菌性、有害物質吸着性、消臭性、結露防止性、及び貯蔵安定性について試験し、下記に示すような基準で評価した。実施例１〜１２の結果を表３に、また、比較例１〜８の結果を表４に示す。
【００４１】
〔塗膜の外観〕
JIS K 5600 1-1 4.4 に従って行い、○：塗膜の外観が正常であるもの、及び、×：ブツや穴等の不具合があるもの、と評価した。
〔塗膜の白色度〕
測色色差計としてJIS K 8722に規定する装置（日本電色色差計）を用い、Ｙ値（白色度）の測定を行った。得られたＹ値が７５以上のものを白色度が高いものと評価した。
【００４２】
〔付着性〕
JIS K5600 5-6（2mm幅）に従って行い、評価した。
〔不粘着乾燥性〕
JIS K5600 3-6に従って行い、評価した。
【００４３】
〔耐水性〕
JIS K5600 6-1の7に従って行い、○：塗膜に異常がないもの、及び、×：皺、膨れ、割れ、剥れ、穴、軟化、又は溶出のいずれかがあるもの、と評価した。
〔抗菌性〕
JIS Z 2801抗菌性試験方法のフィルム密着法に従って行い、大腸菌及び黄色ブドウ球菌の抑制率を評価した。
【００４４】
〔有害物質吸着性〕
試験ガス調整用テドラーバック（材質：PVF、容量：５リットル）に試験板（7×15cm）と設定初期濃度（10ppm）のガスを注入し、２４時間経過後の臭気ガス濃度を検知管（北川式）で測定した。有害物質としてはホルムアルデヒドを用いた。
〔消臭性〕
試験ガス調整用テドラーバック（材質：PVF、容量：５リットル）に試験板（7×15cm）と設定初期濃度（4ppm）のガスを注入し、２４時間経過後の臭気ガス濃度を検知管（北川式）測定した。臭気物質としてはアンモニア及び酢酸を用いた。
【００４５】
〔結露防止性〕
２３℃、５０%RHの雰囲気に放置した恒温恒湿度試験機（ハイフレックスFX421P）のガラスドア面に塗布し、エタック内の温度を５℃にして１時間放置し、その後に塗膜上に発生した結露の有無を観察し、○：水滴が発生していない、△：水滴が発生している、×：水滴が流れている、と評価した。
〔貯蔵安定性〕
JIS K5600 2-7の常温安定性試験に従って行い、３ヶ月経過時に塗料状態、塗膜状態を確認し、○：異常がないもの、△：やや問題はあるものの支障なく使用できるもの、×：使用できないもの、と評価した。
【００４６】
【表３】
【表４】
表３に示す結果から明らかなように、各実施例１〜１２の塗料組成物は、いずれも塗膜の外観、付着性、不粘着乾燥性、耐水性、結露防止性、及び貯蔵安定性という塗料としての基本性能に優れているだけでなく、白色度に優れていて容易に任意の色調に優れており、内装材用の塗料組成物として最適である。また、これら各実施例１〜１２の塗料組成物から、多孔性焼成物の配合量が多いものほど、結露防止性や消臭性が良好であることがわかる。
【００４９】
また、多孔性焼成物の焼成温度が８００℃で焼成回数１回の実施例９の塗料組成物、第１回目の焼成温度が５００℃であって第２回目の焼成温度が１，０００℃である実施例１１の塗料組成物は、塗膜の白色度がやや低く、酢酸等の酸性の消臭性が低くなる。更に、１，４００℃で焼成回数１回の実施例１０の塗料組成物、再焼成温度が１，６００℃である実施例１２の塗料組成物は、アンモニアの消臭性がやや劣る。
【００５０】
多孔性焼成物については、混練物を６００〜１，０００℃で一次焼成した後、１，０００〜１，５００℃で二次焼成し、平均粒径０．５mm以下に粉砕調整するのが理想的だが、焼成温度が低めであると白色度が低く、酸性の消臭性が低くなり、高温域であるとアルカリ性の消臭性が低くなるが使用上は支障ないことがわかる。
【００５１】
表４に示す結果から明らかなように、多孔性焼成物を全く配合しない比較例５やその配合量の少ない比較例１の塗料組成物は、各実施例の塗料組成物に比べて、抗菌性、有害物質吸着性、消臭性、及び結露防止性において劣り、反対に多孔性焼成物を５０重量%配合した比較例２の塗料組成物は、吸着性能については優れているものの、塗料組成物としての基本性能の１つである貯蔵安定性が悪くなってしまい内装材用塗料として使用できない。
【００５２】
また、水系エマルジョン樹脂の造膜温度が−７℃の比較例３の塗料組成物は、不粘着性が悪く内壁用としては使用できず、更に、造膜温度が２３℃の比較例４の塗料組成物は、塗膜が割れ易くて、沸点２５０℃以下の造膜性の高い揮発性有機化合物を配合しないと使用できない。
更に、透湿性を有する樹脂を使用した比較例６及び７は、抗菌性、有害物質吸着性、消臭性、及び結露防止性等において所定の機能性は有しているが、耐水性や貯蔵安定性といった塗料組成物の基本性能が悪く、これも内装材用塗料として使用できない。
また、多孔性焼成物の平均粒子径が１ｍｍである比較例８の塗料組成物は、塗膜の外観で粗粒子が多くなり、貯蔵安定性もやや悪くなる。
【００５３】
【発明の効果】
本発明によれば、単に内装材用塗料として優れた基本性能を備えているだけでなく、有害物質吸着性や消臭性等の吸着性能においても優れた性能を有する内装材用塗料組成物を提供することができる。
また、このような内装材用塗料組成物を内装用基材に塗布して得られ、内装材用の塗膜としてその基本性能に優れているだけでなく、有害物質吸着性や消臭性等の吸着性能においても優れている塗装内装材を提供することができる。[0001]
BACKGROUND OF THE INVENTION
The present invention includes a porous fired product obtained by firing a kneaded product of pulverized coal and an inorganic binder, and is used for building interior materials, vehicle interior materials, furniture, daily necessities, etc. Can be applied to various interior materials and furnishings used in daily living spaces (hereinafter collectively referred to as "interior materials"), and is particularly excellent in interior material paints with excellent adsorption performance such as adsorptive and deodorizing harmful substances. The present invention relates to a composition and a paint interior material obtained by applying the paint composition for interior material and used in human living space.
[0002]
[Prior art]
[Patent Document 1]
JP-A-8-48,917
[Patent Document 2]
JP-A-9-194,765
[Patent Document 3]
Japanese Patent Laid-Open No. 10-140,045
[Patent Document 4]
JP 2000-95,980
[Patent Document 5]
Japanese Patent Laid-Open No. 2002-317,143
[Patent Document 6]
JP-A-11-29,742
[Patent Document 7]
JP 2000-319,587
[Patent Document 8]
Japanese Patent Laid-Open No. 2002-167,287
[Patent Document 9]
JP 2002-179,980
[Patent Document 10]
Japanese Patent Laid-Open No. 2002-302,635
[Patent Document 11]
Registered Utility Model No. 3,085,790
[0003]
In recent years, air conditioning facilities have been enhanced in buildings such as ordinary houses, office buildings, theaters, movie theaters, department stores, and vehicles such as automobiles and trains. Airtightness is improved. For this reason, the occurrence of condensation or mold in poorly ventilated or ventilated parts becomes a problem, or interior materials for buildings such as wall materials, ceiling materials, partition materials, wall cloth materials, vehicles such as cars and trains, etc. Various interior materials and furniture used in human living spaces, such as interior materials for vehicles used in the interior of a car, furniture for furniture, daily necessities, etc. ) Sick house syndrome caused by harmful substances such as formaldehyde volatilized from) has become a social problem.
[0004]
Therefore, in the paint industry, as a countermeasure against the occurrence of such condensation and mold, and further harmful substances, for example, a paint composition containing a silver-based antibacterial agent as an antibacterial agent (Japanese Patent Laid-Open Nos. 8-48,917 and 9-194,765), a coating composition containing an amine compound or the like as a chemical adsorbent (see JP-A-10-140,045), and a deodorant coating composition containing a zeolite or the like as a deodorant (JP 2000-95,980)), and a coating composition containing diatomaceous earth as a humidity control agent (see JP-A-2002-317,143) has been proposed.
[0005]
However, silver antibacterial agents have excellent antibacterial properties, but have problems with anti-condensation, adsorbing performance such as harmful substance adsorption and deodorization, and amine compounds for use as chemical adsorbents. In addition to being a sensitizing substance itself, there are problems in terms of adsorption saturation and condensation prevention, etc., and the use of zeolite as a deodorant, such as storage stability of coating composition and adsorption saturation In addition, there is a problem that the use of diatomaceous earth as a humidity control agent has a problem that the humidity control effect is not exhibited unless it is a thick film specification with a trowel coating, and it is easy to break, and a deodorizing effect cannot be expected.
[0006]
Therefore, in the past, in order to solve such problems, various charcoal components (white charcoal, black charcoal, bamboo charcoal, bincho charcoal, rice bran charcoal, coconut husk charcoal, food residue charcoal, magnetic card charcoal, activated carbon are included in the coating composition. Etc.) alone or together with other ingredients such as barley stone, and attempts have been made to impart functionality such as adsorption performance of this charcoal component to paints, for example, having moisture permeability as a resin component Those using a polyamide resin (Japanese Patent Laid-Open Nos. 11-29,742 and 2000-319,587), those using a cellulose resin (Japanese Patent Laid-Open No. 2002-179,980), and a moisture-permeable acrylic emulsion resin Some have been proposed (Japanese Unexamined Patent Publication No. 2002-302,635), those using polyvinyl alcohol (Registered Utility Model No. 3,085,790), and the like.
[0007]
However, in a paint composition containing a conventional charcoal component, the charcoal component to be blended is basically black, so the paint blended with this charcoal component must be black in appearance, and therefore It is limited to use in places where it is not visible to the eyes such as intrusions and under floors, or where it is not necessary to apply design effects, or as a base preparation that does not appear on the surface, etc. There were also various problems in performance (for example, appearance of coating film, adhesion, non-tacky drying property, water resistance, anti-condensation property, storage stability, etc.).
[0008]
That is, when a polyamide resin having moisture permeability is used as the resin component, it contains a large amount of organic solvent, which is not preferable as a coating interior material, and when a moisture-permeable acrylic emulsion resin containing colloidal silica is used. Are poorly dispersible due to poor miscibility of the charcoal component, and have problems such as poor appearance of the coating film, poor stain resistance, and poor storage stability due to precipitation, both of which are not necessarily paint compositions for interior materials. It is not satisfactory. In addition, when a cellulose resin or polyvinyl alcohol is used as the resin component, the formed coating film has insufficient water resistance and adhesion, and when used as a coating interior material, the coating film peels off after coating. There is a problem of elution and swelling of the coating film due to washing, and it is not suitable as a coating composition for interior materials.
[0009]
Japanese Patent Application Laid-Open No. 2002-167,287 discloses that a kneaded product of 70 to 90 parts by weight of powdered charcoal and 10 to 30 parts by weight of clay is molded, and the resulting molded body is fired to obtain a substantially white porous material. A porous fired product obtained by pulverizing this porous fired product to 200 mesh or more, alone or together with charcoal powder such as bamboo charcoal, a phenol resin paint or polyvinyl alcohol (specifically In particular, the interior of ceilings, walls, sashes, etc. can be easily prepared and used in any color tone by blending in 10 to 30 parts by weight in 100 parts by weight of Nippon Gosei Co., Ltd. trade name “GOHSENOL”) It has been proposed to make a paint for materials.
[0010]
However, even in a paint composition containing this porous fired product, when a phenol resin paint is used as a resin component, it is thermosetting. There is a problem that it cannot be used as a paint interior material because it has to be a factory coating specification, and when polyvinyl alcohol is used as a resin component, the water resistance and adhesion of the formed coating film are insufficient. However, when used as a paint interior material, there is a problem of peeling of the paint film after painting, elution and swelling of the paint film by washing, and it is for interior materials in the same manner as paint compositions containing the above various charcoal components. As a paint to be used as, there were serious problems in its basic performance.
[0011]
[Problems to be solved by the invention]
Therefore, the present inventors have no problems as in various coating compositions using the above-described charcoal component and porous fired product, and are excellent in adsorption performance such as harmful substance adsorption and deodorization. In addition to the basic performance as a coating material for interior materials, in particular, the coating composition for interior materials has excellent performance in terms of coating film appearance, tack-free drying, water resistance, anti-condensation, storage stability, etc. As a result of diligently examining the above, as a resin component, a non-moisture permeable water-based emulsion resin having a minimum film forming temperature of −5 ° C. or more and less than 20 ° C. was used, and the predetermined porous fired product described in JP-A-2002-167,287 was used for this. By blending at a specified ratio, it is possible to develop a coating composition for interior materials that has excellent basic performance as a coating material for interior materials, and also has excellent adsorption performance such as adsorptive to harmful substances and deodorization. The present invention has been reached.
[0012]
Accordingly, an object of the present invention is not only to have an excellent basic performance as a coating material for interior materials, but also to a coating composition for interior materials having excellent performance in adsorption performance such as harmful substance adsorption and deodorization. To provide things.
Another object of the present invention is obtained by applying such a coating composition for interior materials to an interior substrate, and is not only excellent in basic performance as a coating film for interior materials, but also harmful. An object of the present invention is to provide a coating interior material that is excellent in adsorption performance such as substance adsorption and deodorization.
[0013]
[Means for Solving the Problems]
That is, the present invention is obtained by firing a kneaded product of a non-moisture permeable water-based emulsion resin having a minimum film forming temperature of −5 ° C. or more and less than 20 ° C., pulverized coal and an inorganic binder, and has an average particle diameter of 0.5 mm. And a substantially white porous fired product, wherein the porous fired product is 10 to 10 in the coating composition.40It is blended at a ratio of% by weight and the content of volatile organic compounds is less than 1%Yes,
The moisture-impermeable water-based emulsion resin is an acrylic emulsion resin or a vinyl acetate emulsion resin.It is a coating composition for interior materials characterized by being.
[0014]
Moreover, this invention is the coating interior material obtained by apply | coating such a coating composition for interior materials to the base material for interior.
[0015]
The resin component used in the present invention needs to be a non-moisture permeable aqueous emulsion resin having a minimum film forming temperature of −5 ° C. or higher and lower than 20 ° C., preferably 0 ° C. or higher and 10 ° C. or lower. When the moisture permeability of this resin component is high, there is a problem that the water resistance of the coating film to be formed is reduced, and when this resin component is a paint resin other than an aqueous emulsion resin, it releases formaldehyde containing a large amount of organic solvent. For this reason, it is not preferable for an interior material, and in either case, when used for an interior material, the desired performance cannot be exhibited in any of its basic performances. On the other hand, when the minimum film-forming temperature is lower than −5 ° C., the obtained coating film has a sticky feeling. On the other hand, when it is 20 ° C. or more, the coating film after drying tends to crack.
[0016]
As such a moisture-impermeable water-based emulsion resinIn the present invention,, Acrylic emulsion resinOrVinyl acetate emulsion resinIs usedIn addition to being able to use either of these alone,BothCan also be used in combination. These non-breathable water-based emulsion treesFatFrom the viewpoint of odor when painting and paintingIs also preferable.
[0017]
Here, in the present invention, “non-moisture permeable” means the moisture permeability of 100 g / m in the evaluation of moisture permeability of JIS Z 0208.2-A thing of 24 hours or less is said. If the resin component to be used is moisture permeable, the desired water resistance cannot be obtained when used as a paint for interior materials. To impart moisture permeability to water-based emulsion resin, there is a method to increase moisture permeability by blending colloidal silica, plastic beads, ceramics, etc., but it is difficult to maintain the water resistance and moisture permeability of the obtained coating film Moreover, the miscibility of the porous fired product is poor and it tends to cause poor dispersion, resulting in problems such as poor appearance of the coating film, poor stain resistance, and poor storage stability due to precipitation. In addition, “water-based emulsion resin” refers to a state in which a coating resin is dispersed in water at a predetermined solid content concentration, and is not a water-based emulsion resin, for example, a solvent-type resin such as an acrylic resin, a polyamide resin, and a phenol resin. When is used as a paint for interior materials, there is a problem of releasing an organic solvent into the room.
[0018]
The porous fired product blended in the non-moisture permeable water-based emulsion resin is obtained by firing a kneaded product of pulverized coal and an inorganic binder, and has an average particle diameter of 0.5 mm or less, preferably 0.1 mm or less. Thus, it needs to be substantially white, preferably whiteness (Y value) of 55 or more, more preferably 60 or more. If the average particle size of the porous fired product exceeds 0.5 mm, the surface state of the coating film formed by coating will be rough and undesirably dirty, and the oil viscosity will be high and the coating viscosity will be high during production. There arises a problem that workability is lowered. Also, the coating film obtained when the porous fired product is not substantially white is not white, and there is a problem that it is not possible to adjust the light color to match the color tone of the room, and if the whiteness is high, the desired light color is obtained. There is an advantage that the color can be freely adjusted.
[0019]
Moreover, about the said porous baked product, the specific surface area is 400-800m.2/ g, preferably 500-700m2/ g and good surface area of 400m2If it is less than / g, there will be a problem of insufficient adsorption of harmful substances.2If it exceeds / g, moisture in the paint is absorbed and the viscosity of the paint rises during storage, resulting in a problem of lack of storage stability.
[0020]
Here, the porous fired product may be any product obtained by firing a kneaded product of pulverized coal and an inorganic binder, for example, by the method described in JP-A-2002-167,287. Can be manufactured.
[0021]
As for the fine coal used in the production of the porous fired product, various fine coal powders, for example, charcoal, bamboo charcoal, palm charcoal, shell charcoal, etc., have an average particle size of 0.05 to 0.5 mm. The thing which grind | pulverized can be mentioned, These can be used individually by 1 type, Moreover, 2 or more types can also be mixed and used. Among these charcoal, bamboo charcoal is particularly preferable from the viewpoint of organic substance adsorption. Examples of the inorganic binder include clays such as porcelain earth, glazed clay, wax, kaolin and clay, and natural inorganic raw materials such as diatomaceous earth and talc. From this viewpoint, porcelain earth is preferable.
[0022]
In preparing a kneaded product of the above pulverized coal and an inorganic binder, the blending ratio of the pulverized coal and the inorganic binder varies depending on the type of the pulverized coal and the inorganic binder used. Charcoal is 70 to 90 parts by weight, preferably 70 to 80 parts by weight, and the inorganic binder is 10 to 30 parts by weight, preferably 20 to 30 parts by weight as an anhydride.
[0023]
The kneaded product of the pulverized coal and the inorganic binder preferably forms an appropriate molded body upon firing in consideration of the moisture content when the inorganic binder contains moisture. Mix pulverized charcoal, inorganic binder and water so that the amount of water to be obtained (no particular limitation, but usually about 15 to 40% by weight of water in the kneaded product), and suitable for a vacuum kneader, etc. It is prepared by sufficiently kneading using a suitable kneading means.
[0024]
The kneaded product thus obtained may be baked as it is without being particularly molded, but is preferably molded into a molded body having an appropriate shape upon firing in a spherical shape, a plate shape, a rod shape, etc. The obtained molded body is fired at a temperature of 600 to 1500 ° C. In firing the kneaded product (molded product), preferably, first, the kneaded product (molded product) is first calcined at 600 to 1,000 ° C. It is preferable to perform secondary firing at 000 to 1,500 ° C., and by performing the two-stage firing in this way, a higher degree of porous fired product obtained while taking advantage of the characteristics of the charcoal component used as a raw material, in particular, adsorption characteristics. Can be whitened. The obtained fired product is pulverized to an average particle size of 0.5 mm or less and used as a porous fired product.
[0025]
In preparing the porous fired product, powdered barley stone is added for the purpose of assisting humidity control, powdered tourmaline is added for the purpose of generating negative ions, emitting far infrared rays, etc. For this purpose, powdery titanium oxide may be added as appropriate, and ceramic fine powder may be added as appropriate within the required ranges for the purpose of improving deodorization and humidity control.
[0026]
And the compounding ratio in the coating composition of such a porous baked product is usually 10 to 10.40When the blending ratio is less than 10% by weight, it is difficult to impart desired hiding properties, adsorption performance, humidity control, etc. to the formed coating film. In addition,40When it exceeds more than% by weight, the storage stability of the resulting coating composition is lowered.
[0027]
In the present invention, the content of the volatile organic compound in the coating composition needs to be 1% by weight or less, preferably 0.5% by weight or less. When the content of the volatile organic compound exceeds 1% by weight, it is not preferable from the viewpoint of influence on the indoor environment. Here, the “volatile organic compound” is an organic solvent used, for example, as a film-forming aid, an antifreezing agent or the like used as an additive in the coating composition, and has a boiling point of 250 which has a great influence on the indoor environment. An organic compound having a temperature of ℃ or less. In the present invention, in order to make the content of the volatile organic compound in the coating composition 1% by weight or less, a film-forming auxiliary having a boiling point of 250 ° C. or less and an additive not containing a volatile organic compound were selected.
[0028]
In the present invention, in addition to the above-described non-moisture permeable water-based emulsion resin and porous fired product, additives generally added to the coating composition, such as pigments, dispersants, Foaming agents, thickeners, preservatives, film-forming aids, antifreezing agents, and the like may be added as necessary.
[0029]
The paint composition of the present invention is an aqueous paint composition based on a water-based emulsion resin, and in the same manner as a resin composition used for a conventional interior material, a general house, office building, theater or movie theater, For interior materials such as wall materials, ceiling materials, partition materials, wall cloth materials, etc. used in buildings such as department stores, interior materials for vehicles used in vehicle interiors of vehicles such as automobiles and trains, indoors and vehicle interiors, etc. It can be suitably used for various interior materials and furniture (interior materials) used in the living space of humans, such as furniture materials and furniture materials used daily.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail based on examples and comparative examples.
[0031]
[Examples 1 to12And Comparative Examples 1 to8]
The following were used as the moisture-impermeable water-based emulsion resin.
resin(1): Non-moisture permeable water-based acrylic copolymer emulsion resin with a minimum film-forming temperature of 0 ° C (trade name: Yodosol AD125, solid concentration 48% by weight, manufactured by NSC Japan)
resin(2): Non-moisture permeable water-based vinyl acetate copolymer emulsion resin with a minimum film-forming temperature of 16 ° C (trade name: Boncoat 2310, solid concentration 50% by weight, manufactured by Dainippon Ink & Chemicals, Inc.)
resin(3): Non-moisture permeable water-based styrene / acrylic copolymer emulsion resin with a minimum film-forming temperature of -2 ° C (trade name: Boncoat VF-1010, solid concentration 50% by weight, manufactured by Dainippon Ink & Chemicals, Inc.)
resin(Four): Non-moisture permeable water-based acrylic copolymer emulsion resin with a minimum film-forming temperature of 13 ° C (trade name made by Clariant Japan Co., Ltd .: Movinyl 792, solid concentration 50% by weight)
[0032]
resin(Five): Non-breathable water-based styrene / acrylic copolymer emulsion resin with a minimum film-forming temperature of -7 ° C (trade name: Ultrazol D-32, solid content concentration 55% by weight, manufactured by Ganz Kasei Co., Ltd.)
resin(6): Non-moisture permeable water-based acrylic copolymer emulsion resin with a minimum film-forming temperature of 23 ° C (trade name: Acryset EMN193E, solid concentration 54% by weight, manufactured by Nippon Shokubai Co., Ltd.)
resin(7): Moisture-permeable, water-based acrylic copolymer emulsion resin with a minimum film-forming temperature of 0 ° C (trade name: Yodosol AD75C, solid concentration 51% by weight, manufactured by NSC Japan)
resin(8): Moisture-permeable water-based acrylic copolymer emulsion resin with a minimum film-forming temperature of 15 ° C (trade name: Movinyl 8020, solid content concentration 43 wt%, manufactured by Clariant Japan)
[0033]
In addition, 40 parts by weight of bamboo charcoal having an average particle diameter of 0.05 mm and 5 parts by weight of shell charcoal are used as fine powder coal, 10 parts by weight of clay having a water content of 0.5% by weight is used as an inorganic binder, and the average particle diameter is 0. Add 5 parts by weight of 05 mm barleystone and 40 parts by weight of porcelain powder having an average particle size of 0.05 mm, knead and fire under the following conditions, pulverize and burn(1)~(9)Was used as a porous fired product. In addition, each fired product obtained(1)~(9)The Y value (whiteness) was measured using an apparatus (Nippon Denshoku color difference meter) defined in JIS K 8722 as a colorimetric color difference meter.
[0034]
Fired product(1): Firing: 600 ° C. for 10 hours → cooling at room temperature → 1,000 ° C. for 18 hours
Average particle size after grinding: 0.05 mm, whiteness (Y value): 60.38
Fired product(2): Firing: 800 ° C. for 10 hours → cooling at room temperature → 1,500 ° C. for 18 hours
Average particle size after grinding: 0.5 mm, whiteness (Y value): 58.43
Fired product(3): Firing: 800 ° C. for 10 hours → cooling at room temperature → 1,000 ° C. for 18 hours
Average particle size after grinding: 0.1 mm, whiteness (Y value): 62.17
Fired product(Four): Firing: 800 ° C. for 10 hours → cooling at room temperature → 1,500 ° C. for 18 hours
Average particle size after grinding: 0.05 mm, whiteness (Y value): 60.05
Fired product(Five): Firing: 800 ° C for 18 hours
Average particle size after grinding: 0.05 mm, whiteness (Y value): 50.38
[0035]
Fired product(6): Firing: 1,400 ° C. for 18 hours
Average particle size after grinding: 0.05 mm, whiteness (Y value): 58.43
Fired product(7): Firing: 500 ° C. for 10 hours → cooling at room temperature → 1,000 ° C. for 18 hours
Average particle size after grinding: 0.05 mm, whiteness (Y value): 49.17
Fired product(8): Firing: 800 ° C. for 10 hours → cooling at room temperature → 1,600 ° C. for 18 hours
Average particle size after grinding: 0.1 mm, whiteness (Y value): 60.05
Fired product(9): Firing: 800 ° C. for 10 hours → cooling at room temperature → 1,500 ° C. for 18 hours
Average particle diameter after grinding: 1.0 mm, whiteness (Y value): 50.05
[0036]
Furthermore, polycarboxylic acid sodium salt (Rohm and Haas brand name: Orotan 731SD) as a dispersant, nonionic surfactant (Nippon Emulsifier brand name: New Coal 565FH) as a wetting agent, thickening Hydroxyethyl cellulose thickener (trade name: Cellosize QP4400, manufactured by Union Carbide) as a preservative, and a blend of mineral oil and nonionic surfactant (trade name: SN Deformer 370, manufactured by San Nopco) as an antifoaming agent Thiabendazole (trade name: San Aisol 100, manufactured by Sanai Oil Co., Ltd.) as an antifungal agent, sodium nitrite (manufactured by Mitsubishi Chemical) as a rust preventive agent, and 2,2,4-trimethyl-1 as a film-forming aid , 3-pentadiol isobutyrate (trade name: Kyowanol D, manufactured by Kyowa Hakko Kogyo Co., Ltd.) was used.
[0037]
Each of the above components was blended in the proportions (% by weight) shown in Table 1 according to conventional methods.12In addition to preparing a coating composition of the above, each of the above components was blended in the proportions (% by weight) shown in Table 2 by a conventional method, and Comparative Examples 1 to8A coating composition was prepared.
[0038]
[Table 1]
[Table 2]
Examples 1 to 1 thus obtained12And Comparative Examples 1 to8For the coating compositions, the appearance of the coating film, the whiteness of the coating film, adhesion, non-tackiness drying property, water resistance, antibacterial properties, harmful substance adsorption, deodorizing property, anti-condensation property, And the storage stability was evaluated and evaluated according to the following criteria. Example 112Table 3 shows the results of Comparative Examples 1 to8Table 4 shows the results.
[0041]
[Appearance of coating film]
It was performed according to JIS K 5600 1-1 4.4, and it was evaluated that ○: the appearance of the coating film was normal, and X: a defect such as a flaw or a hole.
[Whiteness of coating film]
The Y value (whiteness) was measured using an apparatus (Nippon Denshoku color difference meter) defined in JIS K 8722 as a colorimetric color difference meter. Those having a Y value of 75 or more were evaluated as having high whiteness.
[0042]
[Adhesion]
Evaluation was performed according to JIS K5600 5-6 (2 mm width).
[Non-adhesive drying]
Evaluation was performed according to JIS K5600 3-6.
[0043]
〔water resistant〕
Evaluation was made according to 7 of JIS K5600 6-1 and evaluated as: ○: no abnormality in the coating film and x: any one of wrinkles, blisters, cracks, peeling, holes, softening, or elution.
[Antimicrobial]
The inhibition rate of E. coli and Staphylococcus aureus was evaluated according to the film adhesion method of the JIS Z 2801 antibacterial test method.
[0044]
[Toxic substance adsorption]
A test plate (7 x 15 cm) and set initial concentration (10 ppm) gas are injected into a test gas adjustment tedlar bag (material: PVF, capacity: 5 liters), and the odor gas concentration after 24 hours is detected by a detector tube (Kitakawa method) ). Formaldehyde was used as a harmful substance.
[Deodorization]
A test plate (7 x 15 cm) and set initial concentration (4 ppm) gas are injected into a test gas adjustment tedlar bag (material: PVF, capacity: 5 liters), and the odor gas concentration after 24 hours is detected by a detector tube (Kitakawa method) )It was measured. Ammonia and acetic acid were used as odor substances.
[0045]
[Condensation prevention]
It is applied to the glass door surface of a constant temperature and humidity tester (Hiflex FX421P) left in an atmosphere of 23 ° C and 50% RH. The presence or absence of dew condensation was observed, and it was evaluated that ○: no water droplets were generated, Δ: water droplets were generated, ×: water droplets were flowing.
[Storage stability]
Performed in accordance with the JIS K5600 2-7 room temperature stability test, and after 3 months, the paint and coating conditions were confirmed. ○: No abnormality, △: Slightly problematic but usable without problems, ×: Use It was evaluated that it was not possible.
[0046]
[Table 3]
[Table 4]
As is apparent from the results shown in Table 3, each of the Examples 1 to12All of these coating compositions are not only excellent in basic performance as paints such as appearance, adhesion, tack-free drying, water resistance, anti-condensation, and storage stability of the coating film, but also excellent in whiteness. Therefore, it is easily excellent in an arbitrary color tone and is optimal as a coating composition for an interior material. Each of these Examples 1 to12From these coating compositions, it can be seen that the larger the amount of the porous fired product, the better the anti-condensation and deodorizing properties.
[0049]
Also, the firing composition of the porous fired product is 800 ° C. and the coating composition of Example 9 is fired once. The first firing temperature is 500 ° C. and the second firing temperature is 1,000 ° C. In the coating composition of Example 11, the whiteness of the coating film is slightly low, and the acid deodorizing property such as acetic acid is low. Furthermore, the coating composition of Example 10 which is fired once at 1,400 ° C. and the coating composition of Example 12 having a re-baking temperature of 1,600 ° C. are slightly inferior in ammonia deodorization..
[0050]
For the porous fired product, it is ideal that the kneaded product is first fired at 600 to 1,000 ° C., then secondary fired at 1,000 to 1,500 ° C. and pulverized to an average particle size of 0.5 mm or less. However, it is understood that when the baking temperature is low, the whiteness is low and the acidic deodorizing property is low, and when it is in the high temperature range, the alkaline deodorizing property is low, but there is no problem in use.
[0051]
As is apparent from the results shown in Table 4, the coating composition of Comparative Example 5 in which no porous fired product is blended or Comparative Example 1 having a small blending amount is more antibacterial than the coating composition of each Example. In contrast, the coating composition of Comparative Example 2 blended with 50% by weight of a porous fired product is inferior in adsorption of harmful substances, deodorant and anti-condensation. The storage stability, which is one of the basic performances, is deteriorated and cannot be used as a paint for interior materials.
[0052]
Further, the coating composition of Comparative Example 3 having a water-based emulsion resin film formation temperature of -7 ° C. has poor tackiness and cannot be used for an inner wall, and further, the coating film of Comparative Example 4 having a film formation temperature of 23 ° C. The composition cannot be used unless the coating film is easily cracked and a volatile organic compound having a boiling point of 250 ° C. or less and a high film-forming property is blended.
Further, Comparative Examples 6 and 7 using a resin having moisture permeability have predetermined functions in antibacterial property, harmful substance adsorption property, deodorization property, anti-condensation property, etc., but are resistant to water and stored. The basic performance of the coating composition such as stability is poor, and this cannot be used as a coating for interior materials.
In addition, the coating composition of Comparative Example 8 in which the average particle diameter of the porous fired product is 1 mm has a large number of coarse particles in the appearance of the coating film, and the storage stability is slightly deteriorated.
[0053]
【The invention's effect】
According to the present invention, there is provided a coating composition for interior materials that has not only excellent basic performance as a coating material for interior materials, but also excellent performance in adsorption performance such as harmful substance adsorption and deodorization. Can be provided.
Moreover, it is obtained by applying such a coating composition for interior materials to an interior substrate, and not only has excellent basic performance as a coating film for interior materials, but also adsorbs harmful substances and deodorant. It is possible to provide a painted interior material that is excellent in the adsorption performance of the coating.
Claims (4)
前記非透湿性水系エマルジョン樹脂が、アクリル系エマルジョン樹脂又は酢酸ビニル系エマルジョン樹脂であることを特徴とする内装材用塗料組成物。It is obtained by firing a kneaded mixture of a non-moisture permeable water-based emulsion resin having a minimum film forming temperature of −5 ° C. or more and less than 20 ° C., pulverized coal and an inorganic binder, and is substantially white with an average particle diameter of 0.5 mm or less. The porous fired product is mixed in the coating composition at a ratio of 10 to 40 % by weight and the content of the volatile organic compound is 1% by weight or less ,
The paint composition for interior materials, wherein the non-moisture permeable water-based emulsion resin is an acrylic emulsion resin or a vinyl acetate emulsion resin .
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| JP2003124286A JP4394370B2 (en) | 2003-04-28 | 2003-04-28 | Paint composition for interior material and painted interior material |
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| WO2006046512A1 (en) * | 2004-10-29 | 2006-05-04 | Masaya Rikino | Water-based coating material |
| JP5393942B2 (en) * | 2005-04-08 | 2014-01-22 | アイカ工業株式会社 | Water-based paint composition and wall surface |
| JP4406468B1 (en) * | 2009-04-03 | 2010-01-27 | 昭和高分子株式会社 | Water-based quick-drying paint composition |
| JP6841615B2 (en) * | 2015-12-26 | 2021-03-10 | エスケー化研株式会社 | Aqueous dressing |
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