JP3827305B2 - Water-based paint composition for interior - Google Patents
Water-based paint composition for interior Download PDFInfo
- Publication number
- JP3827305B2 JP3827305B2 JP2002321866A JP2002321866A JP3827305B2 JP 3827305 B2 JP3827305 B2 JP 3827305B2 JP 2002321866 A JP2002321866 A JP 2002321866A JP 2002321866 A JP2002321866 A JP 2002321866A JP 3827305 B2 JP3827305 B2 JP 3827305B2
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- water
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- paint
- component
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Description
【0001】
【発明の属する技術分野】
本発明は、新規な内装用塗料組成物に関するものである。
【0002】
【従来の技術】
木や草等を原料とする植物性粉粒体は、天然の素材であり、また、独特の触感や、優れた吸放湿性能等を有することから、内装用材料としての利用が期待されている。
植物性粉粒体を含む塗料として、例えば、特開昭58−204059号公報では、合成樹脂塗料70〜80%と顔料10〜20%とコルクの粉末10%とを混和した塗料が開示されている。また、特開平10−158549号公報では、水溶性高分子化合物と天然素材粉砕物とを加水混合してなる塗料が開示されている。
しかしながら、これら従来技術の塗料では、
・塗料貯蔵中に植物性粉粒体からアクが発生し、塗料の色相に悪影響を与える
・植物性粉粒体中に樹脂が染み込んでしまい、植物性粉粒体が有する触感、芳香性、吸放湿性等の性質が阻害される
等の問題が発生するおそれがある。
【0003】
【特許文献1】
特開昭58−204059号公報(特許請求の範囲)
【特許文献2】
特開平10−158549号公報(特許請求の範囲)
【0004】
【発明が解決しようとする課題】
本発明は、このような点に鑑みされたものであり、貯蔵安定性に優れ、さらには、触感、芳香性、吸放湿性等の物性に優れた塗膜が形成可能な塗料を得ることを目的とするものである。
【0005】
【課題を解決するための手段】
これらの課題を解決するため、本発明者は鋭意検討を行い、特定の樹脂と植物性粉粒体とを組合わせることに想到し、本発明を完成した。
すなわち、本発明は以下の特徴を有するものである。
1.(A)pH7以下のカチオン性水分散性樹脂液、及び
(B)植物性粉粒体、
を含有し、(A)成分の固形分100重量部に対し、(B)成分を10〜500重量部含有することを特徴とする内装用水性塗料組成物。
2.(B)植物性粉粒体として、漂白された植物性粉粒体を含むことを特徴とする1.に記載の内装用水性塗料組成物。
3.(B)植物性粉粒体が、漂白の程度が異なる複数色の植物性粉粒体からなることを特徴とする2.に記載の内装用水性塗料組成物。
4.水性塗料組成物中の水の含有量が20〜90重量%であることを特徴とする1.〜3.のいずれかに記載の内装用水性塗料組成物。
5.さらに、(C)着色材料を1〜500重量部含有することを特徴とする1.〜4.のいずれかに記載の内装用水性塗料組成物。
6.(C)着色材料が、(C−1)着色粉粒体であることを特徴とする5.に記載の内装用水性塗料組成物。
【0006】
【発明の実施の形態】
本発明では(A)pH7以下のカチオン性水分散性樹脂液(以下「(A)成分」という)を結合剤として用いる。
(A)成分のpHは7以下、好ましくは1〜6、さらに好ましくは2〜4である。pHがこのような値であることにより、塗料貯蔵中における植物性粉粒体からのアク発生を防止し、さらに、植物性粉粒体が有する種々の性質、例えば触感、吸放湿性、柔軟性、吸音性等が阻害されるのを防止することができる。
【0007】
(A)成分としては、アミノ基、アンモニウム基、ホスホニウム基等のカチオン性官能基を有する水分散性樹脂を使用することができる。具体的には、例えば、
(A−1)アミノ基、アンモニウム基、ホスホニウム基等のカチオン性官能基を有するカチオン性モノマーを、その他の重合性モノマーと共に、乳化重合等の方法によって水中で重合したもの;
(A−2)アミノ基、アンモニウム基、ホスホニウム基等のカチオン性官能基を有するカチオン性水溶性樹脂の存在下で、重合性モノマーを乳化重合等の方法によって水中で重合したもの;
(A−3)アミノ基、アンモニウム基、ホスホニウム基等のカチオン性官能基を有するカチオン性界面活性剤の存在下で、重合性モノマーを乳化重合等の方法によって水中で重合したもの;
(A−4)アミノ基、アンモニウム基、ホスホニウム基等のカチオン性官能基を有するカチオン性有機溶剤系樹脂を、有機酸、無機酸等で中和し水を加えて水中に分散させたもの;
(A−5)アミノ基、アンモニウム基、ホスホニウム基等のカチオン性官能基を有するカチオン性界面活性剤を用いて、有機溶剤系樹脂を水中に分散させたもの;
等が挙げられる。このうち、(A−1)、(A−2)、(A−3)は、有機溶剤含有量の少ない水分散性樹脂を容易に製造することができる点で好適である。
【0008】
(A)成分を構成する重合性モノマーとしては、紫外線吸収性モノマーを使用することも可能である。このようなモノマーを使用することにより、植物性粉粒体や、植物性粉粒体に含まれるアク成分等に起因する塗膜の変退色を効果的に抑制することができる。紫外線吸収性モノマーとしては、例えば、シアノアクリレート系紫外線吸収性モノマーや、ベンゾトリアゾール系紫外線吸収性モノマー等を挙げることができる。この他、ピペリジル基含有モノマー等のラジカル捕捉能を有するモノマー等を使用することもできる。
【0009】
(A)成分の最低造膜温度は5℃以下、さらには0℃以下であることが望ましい。このような最低造膜温度を有する(A)成分を採用することにより、造膜助剤の使用量を削減することが可能となる。
(A)成分の平均粒子径は特に限定されないが、通常10〜500nm、好ましくは20〜300nmである。
【0010】
本発明の(B)植物性粉粒体(以下「(B)成分」という)は、木や草等を粉砕して得られるものである。このような(B)成分は天然の素材であることから、環境適応形の素材として好ましいものである。
(B)成分の原料となる植物としては、例えば、マツ、スギ、ヒノキ、モミ、ケヤキ、ナラ、ラワン、ヒバ、キリ、ブナ、カシ、コルクガシ等の木本類、アシ、ラン、イグサ、イネ、ムギ、ケナフ、フキ、コウゾ等の草本類等が挙げられ、これらの樹皮、幹、枝、葉、根等が利用でき、この他、果物の皮や種子、海草、鋸屑、籾殻等を使用することもできる。
(B)成分の形状としては、例えば、球状、繊維状、板状、棒状、リン片状等が挙げられるが、これらに限定されるものではない。(B)成分の大きさも特に限定されないが、球状粉粒体の場合は概ね0.01〜5mmの粒径のものを使用することができる。このような(B)成分は、1種または2種以上で使用することができる。
なお、本発明における(B)成分としては通常、無着色品を用いる。
【0011】
(B)成分には通常、多種多様な成分、例えば、各種糖類の他、タンニン、セサミン、パウロニン、ピノレジノール、ロイコアントシアニン、アクテオシド等の成分が含まれている。このような成分は塗料貯蔵中にアクとして溶出し、塗料の色相に悪影響を及ぼすおそれがあるが、本発明では、上述の(A)成分を使用することにより、これら成分の溶出を防止することができる。従って、植物性粉粒体が有する種々の性質をそのまま生かすことが可能となる。
【0012】
本発明では、(B)成分として、漂白された植物性粉粒体を混合することもできる。(B)成分を漂白する方法としては、公知の方法を用いればよい。漂白剤としては、例えば、次亜塩素酸ナトリウム、次亜塩素酸カルシウム、過酸化水素、オゾンガス等が挙げられる。
(B)成分を漂白する際、その漂白の程度によって(B)成分の白色度を調整することができる。本発明では、漂白度が異なる複数色の(B)成分を混合することによって、様々な色相を表出することが可能となる。このとき、(B)成分として無漂白品を混合することもできる。
【0013】
本発明では、(B)成分が有する触感、芳香性、吸放湿性、柔軟性、吸音性等の性質を損わない限り、(B)成分に前処理(難燃化処理、着色処理等)を施すことも可能である。ここで使用可能な処理剤としては、例えば、アルコキシシラン類、珪酸塩類、有機樹脂類、あるいはこれらの混合物等を含有するものが挙げられる。
【0014】
本発明組成物では、(A)成分の固形分100重量部に対し、(B)成分を10〜500重量部含有する。(B)成分が10重量部より少ない場合は、(B)成分による触感、吸放湿性等の効果が得られない。500重量部より多い場合は、形成塗膜の付着性が低下するおそれがある。
【0015】
本発明組成物においては、上述の成分に加えて、(C)着色材料(以下「(C)成分」という)を混合することにより、任意の色相に着色することが可能となる。(C)成分としては、例えば、(C−1)着色粉粒体、(C−2)無機顔料、(C−3)有機顔料等が使用可能である。
(C−1)着色粉粒体としては、例えば、着色合成樹脂粉粒体、着色木粉等が挙げられる。このうち、着色合成樹脂粉粒体としては、例えば、合成樹脂粒子中に顔料が均一に分散したもの、合成樹脂粒子の表面近傍に顔料が局在化したもの、合成樹脂粒子に染料を化学的に結合させたもの等が挙げられる。具体的には、アクリル樹脂ビーズ、ウレタン樹脂ビーズ、ポリアミド樹脂ビーズ、尿素−ホルムアルデヒド樹脂ビーズ、シリコーン樹脂ビーズ、フッ素樹脂ビーズ、フェノール樹脂ビーズ、メラミン−ホルムアルデヒド樹脂ビーズ、ポリアクリロニトリルビーズ、ベンゾグアナミンビーズ、ナイロンビーズ等の着色物が使用可能である。着色木粉としては、顔料で木粉をコーティングしたもの等が挙げられる。
(C−2)無機顔料としては、例えば、酸化チタン、炭酸カルシウム、シリカ、アルミナ、酸化亜鉛、珪藻土、タルク、クレー、カーボンブラック、黒鉛、黒色酸化鉄、銅クロムブラック、コバルトブラック、銅マンガン鉄ブラック、べんがら、黄色酸化鉄等が挙げられる。
(C−3)有機顔料としては、例えば、モリブデートオレンジ、パーマネントレッド、パーマネントカーミン、ペリレンレッド、キナクリドンレッド、ファーストイエロー、ベンツイミダゾロンイエロー、フタロシアニングリーン、フタロシアニンブルー、キナクリドンバイオレット、ジオキサジンバイオレット等が挙げられる。
【0016】
本発明では、(C)成分として、特に(C−1)着色粉粒体が好適である。このような(C−1)成分は、分散剤を使用しなくても塗料中に容易に分散することができるものである。そのため、分散剤による貯蔵安定性低下や各種塗膜物性の低下を防ぐことが可能となる。
【0017】
(C)成分の混合量は、(A)成分の固形分100重量部に対し1〜500重量部、好ましくは2〜200重量部である。(C)成分が1重量部より少ない場合は、十分な着色効果を得ることができない。500重量部より多い場合は、(B)成分による触感等が損なわれるおそれがある。
【0018】
上述の成分の他、本発明組成物においては、多価金属の塩(例えば、多価金属の硫酸塩、酢酸塩、有機酸塩、珪酸塩等)や多価金属の酸化物を混合することもできる。このような成分を混合すれば、塗料貯蔵中における植物性粉粒体からのアク発生をより確実に抑制することができる。多価金属の塩としては、例えば硫酸アルミニウム、酢酸アルミニウム、アルミン酸ナトリウム、塩基性硫酸アルミニウム、塩基性塩化アルミニウム、ステアリン酸アルミニウム、オレイン酸アルミニウム、縮合リン酸アルミニウム、ステアリン酸亜鉛、ラウリン酸亜鉛、ステアリン酸マグネシウム、ステアリン酸バリウム等が挙げられる。多価金属の酸化物としては、酸化亜鉛、酸化アンチモン、酸化チタン等が挙げられる。このうち、硫酸アルミニウム、酢酸アルミニウム、アルミン酸ナトリウム、塩基性硫酸アルミニウム、塩基性塩化アルミニウム、ステアリン酸アルミニウム、縮合リン酸アルミニウム等のアルミニウム化合物が好ましく用いられる。この中でも、特に縮合リン酸アルミニウムが好適である。
【0019】
本発明組成物においては、上述の成分に加えて、繊維長0.01〜10mmの繊維を混合することもできる。このような成分を混合することにより、特に鏝塗りを行った際の作業性及び仕上り性を向上させることができる。
【0020】
本発明組成物においては、紫外線吸収剤を混合することもできる。このような紫外線吸収剤を混合することにより、植物性粉粒体や、植物性粉粒体に含まれるアク成分等に起因する塗膜の変退色を効果的に抑制することができる。紫外線吸収剤としては、実質的にバインダーの透明性を阻害しない範囲内で、その種類、混合量、混合方法等を設定することが望ましい。バインダーの透明性を阻害しない範囲内であれば、植物粉粒体特有の意匠性が十分に表出可能となる。
具体的に、紫外線吸収剤としては、例えば、2,4−ジヒドロキシベンゾフェノン、2−ヒドロキシ−4−メトキシベンゾフェノン、2−ヒドロキシ−4−オクチルオキシベンゾフェノン、2−ヒドロキシ−4−ドデシルオキシベンゾフェノン、2,2’−ジヒドロキシ−4−メトキシベンゾフェノン、2−ヒドロキシ−4−メトキシベンゾフェノン−5−スルホン酸、2,2−ジヒドロキシ−4,4’−ジメトキシベンゾフェノン−5,5’−ジスルホン酸等のベンゾフェノン系紫外線吸収剤;
2−(2’−ヒドロキシフェニル)ベンゾトリアゾール、2−(2’−ヒドロキシ−5’−メチルフェニル)ベンゾトリアゾール、2−(2’−ヒドロキシ−5’−t−ブチルフェニル)ベンゾトリアゾール、2,2−メチレンビス[4−(1,1,3,3,−テトラメチルブチル)−6−(2H−ベンゾトリアゾール−2−イル)フェノール、2−フェニルベンズイミダゾール−5−スルホン酸、メチル3−(3−(2H−ベンゾトリアゾール−2−イル)−5−t−ブチル−4−ヒドロキシフェニル)プロピオネートとポリエチレングリコ−ルとの反応生成物等のベンゾトリアゾール系紫外線吸収剤;
フェニルサリシレート、p−t−ブチルフェニルサリシレ−ト、p−オクチルフェニルサリシレート等のサリチル酸系紫外線吸収剤;
2−エチルヘキシル−2−シアノ−3,3’−ジフェニルアクリレート、エチル−2−シアノ−3,3’−ジフェニルアクリレート等のシアノアクリレート系紫外線吸収剤;
その他、トリアジン系紫外線吸収剤、蓚酸アニリド系紫外線吸収剤、アミノ安息香酸系紫外線吸収剤、ケイ皮酸系紫外線吸収剤、微粒酸化チタン、微粒酸化亜鉛等の無機系紫外線吸収剤等が挙げられる。このうち、常温で液状の紫外線吸収剤については、樹脂との相溶性が良好なものが好適である。
紫外線吸収剤を本発明組成物に混合する方法としては、直接混合する方法、造膜助剤等の溶剤に溶解させた後に混合する方法、界面活性剤によって乳化した後に混合する方法等が挙げられる。このうち、界面活性剤で乳化する場合には、その乳化物の粒子径を3μm以下(好ましくは2μm)以下とすることが望ましい。
紫外線吸収剤の混合量は、(A)成分の固形分100重量部に対し通常1〜20重量部程度である。
【0021】
本発明組成物にはアルデヒド吸着剤を混合することもできる。アルデヒド吸着剤としては、例えば、アミン化合物、アミド化合物、イミド化合物、尿素化合物、ヒドラジド化合物、アゾール化合物、アジン化合物、層状リン酸化合物等が挙げられる。このような成分を混合することにより、ホルムアルデヒド等に起因する室内環境汚染を抑制することができる。また、使用する植物性粉粒体の種類や、その処理履歴等によっては、植物性粉粒体の構成成分であるリグニン、多糖類等からホルムアルデヒドが生成する場合があるが、アルデヒド吸着剤を混合すれば、このようなホルムアルデヒドの室内への放散を防止することも可能となる。
【0022】
上述の成分の他、本発明組成物においては、通常塗料に使用可能な添加剤、例えば、顔料、骨材、染料、増粘剤、レベリング剤、湿潤剤、可塑剤、防腐剤、防黴剤、防藻剤、抗菌剤、界面活性剤、消泡剤、光安定剤、光触媒、架橋剤等を、本発明の効果を阻害しない範囲で混合することもできる。形成塗膜の防火性を高めるために、例えば、リン系難燃剤、臭素系難燃剤、塩素系難燃剤、その他水酸化アルミニウム、ホウ酸亜鉛等を混合することもできる。
【0023】
本発明の水性塗料組成物中における水の含有量は通常20〜90重量%、好ましくは40〜85重量%、さらに好ましくは50〜80重量%である。これにより、使用時に大量の水を加えなくても塗装することが可能となる。また、本発明ではこのような量の水を含んでいても良好な貯蔵安定性を確保することができる。
【0024】
本発明組成物全体のpHは通常7以下、好ましくは1〜6、さらに好ましくは2〜4である。本発明組成物のpHがこのような値であることにより、塗料の貯蔵安定性や、触感、吸放湿性等の塗膜物性をより高めることが可能となる。
【0025】
本発明組成物は、主に建築物の内装用塗料として有用であり、内壁、天井等を構成する各種基材表面に対して適用することができる。具体的にその基材としては、例えば、石膏ボード、合板、コンクリート、モルタル、磁器タイル、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、ALC板、サイディング板、押出成形板、鋼板、プラスチック板等が挙げられる。これら基材の表面は、何らかの表面処理(例えば、シーラー、サーフェーサー、フィラー等)が施されたものでもよく、既に塗膜が形成されたものや壁紙が貼り付けられたものでもよい。
本発明組成物の塗付方法としては、公知の方法を採用することができ、例えば、スプレー、ローラー、刷毛、鏝等の塗装器具を用いて塗付することができる。
塗付時には、本発明組成物を水で希釈することもできる。希釈割合は、通常0〜100重量%、好ましくは0〜50重量%である。
塗付量は、特に限定されないが、通常0.3〜5kg/m2、好ましくは0.5〜4kg/m2である。
【0026】
本発明組成物を塗装した後、透明性を有する上塗塗料を塗付することもできる。上塗塗料としては、(P)シリコーンエマルション、及び(Q)前記(P)以外の合成樹脂エマルションを含有し、(P)成分と(Q)成分の固形分比率が95:5〜5:95である上塗塗料が好適である。このような上塗塗料を使用することにより、本発明組成物による塗膜の吸放湿性等の効果を阻害せずに、汚れ防止性を付与することができる。
上塗塗料の塗装においては、例えば、スプレー、ローラー、刷毛等の塗装器具を用いることができる。上塗層の塗付量は、特に限定されないが、通常0.01〜0.5kg/m2、好ましくは0.05〜0.3kg/m2である。
【0027】
【実施例】
以下に実施例を示し、本発明の特徴をより明確にする。
【0028】
(実施例1)
水性樹脂A200重量部に対し、植物性粉粒体としてケナフ粉200重量部と、ヒドロキシエチルセルロース3重量%水溶液500重量部と、水430重量部と、シリコーン系消泡剤5重量部とを混合・攪拌することにより塗料を製造した。この塗料における水の含有量は76重量%となった。なお、水性樹脂Aとしては、カチオン性アクリル樹脂エマルション(スチレン−メチルメタクリレート−ブチルアクリレート−ジメチルアミノエチルアクリレート共重合体、pH3.0、最低造膜温度2℃、固形分50重量%)を使用した。
得られた塗料について以下の試験を行った。
【0029】
貯蔵安定性
製造した塗料を容器内に密閉し、20℃下にて168時間放置したときの外観変化を目視にて確認した。また、放置前及び放置後の粘度を回転粘度計で測定し、その粘度変化を確認した。
【0030】
吸放湿性
予めシーラーが塗装された150mm×70mmのアルミニウム板表面に、塗料を塗付量2kg/m2で鏝塗りし、温度20℃・湿度65%下で14日間乾燥させたものを試験体とした。なお、塗料としては、製造直後の塗料と、20℃下にて168時間放置した後の塗料を用いて、それぞれ試験体を作製した。
作製した試験体の重量WD0を測定した後、これを温度20℃・湿度90%下で24時間放置後、重量WW1を測定し、続いて、温度20℃・湿度45%下で24時間放置し、重量WD1を測定した。同様の操作をもう1回繰り返し、湿潤状態での重量WW2と乾燥状態での重量WD2とを測定した。
次に、図1に示すように横軸に時間、縦軸に重量をとり、吸放湿曲線を作成し、下式により吸放湿特性値を算出して、その平均値を求めた。
吸湿量W1(g)=WW1−WD0
放湿量W2(g)=WW1−WD1
吸湿量W3(g)=WW2−WD1
放湿量W4(g)=WW2−WD2
吸放湿特性値(g/m2)=(W1+W2+W3+W4)/{4×(試験体面積)}
【0031】
試験結果
実施例1では、貯蔵安定性試験において外観や粘度の異常は認められなかった。粘度変化は10%未満であった。また、実施例1では、柔らかな触感を有する淡黄色の塗膜が形成された。
吸放湿性試験において、製造直後の塗料の吸放湿特性値は112g/m2、20℃で168時間放置した塗料の吸放湿特性値は115g/m2であり、いずれも優れた吸放湿性能を示した。
【0032】
(実施例2)
水性樹脂A200重量部に対し、植物性粉粒体としてケナフ粉200重量部と、ヒドロキシエチルセルロース3重量%水溶液500重量部と、水430重量部と、シリコーン系消泡剤5重量部と、白色合成樹脂粉粒体10重量部と、青色合成樹脂粉粒体3重量部とを混合・攪拌することにより塗料を製造した。この塗料における水の含有量は75重量%となった。
得られた塗料について実施例1と同様の試験を行った。
実施例2では、貯蔵安定性試験において外観や粘度の異常は認められなかった。粘度変化は10%未満であった。また、実施例2では、柔らかな触感を有する青灰色の塗膜が形成された。
吸放湿性試験において、製造直後の塗料の吸放湿特性値は118g/m2、20℃で168時間放置した塗料の吸放湿特性値は120g/m2であり、いずれも優れた吸放湿性能を示した。
【0033】
(実施例3)
水性樹脂A200重量部に対し、植物性粉粒体としてケナフ粉200重量部と、ヒドロキシエチルセルロース3重量%水溶液500重量部と、水430重量部と、シリコーン系消泡剤5重量部と、白色合成樹脂粉粒体10重量部と、青色合成樹脂粉粒体3重量部と、紫外線吸収剤A5重量部とを混合・攪拌することにより塗料を製造した。この塗料における水の含有量は75重量%となった。
なお、紫外線吸収剤Aとしては、メチル3−(3−(2H−ベンゾトリアゾール−2−イル)−5−t−ブチル−4−ヒドロキシフェニル)プロピオネートとポリエチレングリコールとの反応生成物(20℃で液状)を使用した。
得られた塗料について実施例1と同様の試験を行った。
実施例3では、貯蔵安定性試験において外観や粘度の異常は認められなかった。粘度変化は10%未満であった。また、実施例3では、柔らかな触感を有する青灰色の塗膜が形成された。
吸放湿性試験において、製造直後の塗料の吸放湿特性値は116g/m2、20℃で168時間放置した塗料の吸放湿特性値は122g/m2であり、いずれも優れた吸放湿性能を示した。
【0034】
(実施例4)
水性樹脂A200重量部に対し、植物性粉粒体としてコルク粉A20重量部とコルク粉B80重量部と、ヒドロキシエチルセルロース3重量%水溶液480重量部と、水160重量部と、シリコーン系消泡剤8重量部とを混合・攪拌することにより塗料を製造した。この塗料における水の含有量は77重量%となった。
なお、コルク粉Aとしては、無漂白コルク粉(赤茶色、粒径1mm以下)を使用した。コルク粉Bとしては、前記コルク粉Aを過酸化水素で漂白処理したもの(淡黄色、粒径1mm以下)を使用した。
【0035】
得られた塗料について実施例1と同様の試験を行った。
実施例4では、貯蔵安定性試験において外観や粘度の異常は認められなかった。粘度変化は10%未満であった。
また、実施例4では、淡黄色地に赤茶色が点在する外観の塗膜が形成された。この塗膜は、柔らかな触感を有するものであった。
吸放湿性試験において、製造直後の塗料の吸放湿特性値は54g/m2、20℃で168時間放置した塗料の吸放湿特性値は58g/m2であり、いずれも優れた吸放湿性能を示した。
【0036】
(実施例5)
水性樹脂A200重量部に対し、植物性粉粒体としてコルク粉A20重量部とコルク粉B80重量部と、ヒドロキシエチルセルロース3重量%水溶液460重量部と、水160重量部と、シリコーン系消泡剤8重量部と、黒色木粉40重量部とを混合・攪拌することにより塗料を製造した。この塗料における水の含有量は73重量%となった。
得られた塗料について実施例1と同様の試験を行った。
実施例5では、貯蔵安定性試験において外観や粘度の異常は認められなかった。粘度変化は10%未満であった。
また、実施例5では、柔らかな触感を有する黒色の塗膜が形成された。
吸放湿性試験において、製造直後の塗料の吸放湿特性値は55g/m2、20℃で168時間放置した塗料の吸放湿特性値は60g/m2であり、いずれも優れた吸放湿性能を示した。
【0037】
(比較例1)
水性樹脂B200重量部に対し、植物性粉粒体としてケナフ粉200重量部と、ヒドロキシエチルセルロース3重量%水溶液500重量部と、水430重量部と、シリコーン系消泡剤5重量部とを混合・攪拌することにより塗料を製造した。この塗料における水の含有量は76重量%となった。なお、水性樹脂Bとしては、アニオン性アクリル樹脂エマルション(スチレン−メチルメタクリレート−ブチルアクリレート共重合体、pH8.0、最低造膜温度4℃、固形分50重量%)を使用した。
得られた塗料について実施例1と同様の試験を行った。
比較例1では、当初淡黄色であった塗料が、貯蔵後、黒く変色してしまった。また、貯蔵後の粘度は、貯蔵前に比べ50%以上上昇してしまった。
吸放湿性試験において、製造直後の塗料の吸放湿特性値は114g/m2であったが、20℃で168時間放置した塗料の吸放湿特性値は88g/m2と大きく低下してしまった。
【0038】
(比較例2)
水性樹脂B200重量部に対し、植物性粉粒体としてコルク粉A100重量部と、ヒドロキシエチルセルロース3重量%水溶液480重量部と、水160重量部と、シリコーン系消泡剤8重量部とを混合・攪拌することにより塗料を製造した。この塗料における水の含有量は77重量%となった。
得られた塗料について実施例1と同様の試験を行った。
比較例2では、当初赤茶色であった塗料が、貯蔵後、黒く変色してしまった。また、貯蔵後の粘度は、貯蔵前に比べ50%以上上昇してしまった。
吸放湿性試験において、製造直後の塗料の吸放湿特性値は55g/m2であったが、20℃で168時間放置した塗料の吸放湿特性値は38g/m2と大きく低下してしまった。
【0039】
(比較例3)
水性樹脂B200重量部に対し、植物性粉粒体としてケナフ粉200重量部と、ヒドロキシエチルセルロース3重量%水溶液500重量部と、水430重量部と、シリコーン系消泡剤5重量部と、白色合成樹脂粉粒体10重量部と、青色合成樹脂粉粒体3重量部とを混合・攪拌することにより塗料を製造した。この塗料における水の含有量は75重量%となった。
得られた塗料について実施例1と同様の試験を行った。
比較例3では、当初青灰色であった塗料が、貯蔵後、黒く変色してしまった。また、貯蔵後の粘度は、貯蔵前に比べ50%以上上昇してしまった。
吸放湿性試験において、製造直後の塗料の吸放湿特性値は115g/m2であったが、20℃で168時間放置した塗料の吸放湿特性値は81g/m2と大きく低下してしまった。
【0040】
耐変退色性
予めシーラーが塗装された150mm×70mmのアルミニウム板表面に対し、実施例3の塗料と比較例3の塗料をそれぞれ塗付量2kg/m2で鏝塗りし、温度20℃・湿度65%下で14日間乾燥させたものを試験体とした。なお、塗料としてはいずれも製造直後の塗料を使用した。
試験体の初期色相(L* 1、a* 1、b* 1)を色彩色差計「CR−300」(ミノルタ株式会社製)を用いて測定した後、紫外線ランプGL−15(紫外線出力15W)を30cmの距離から168時間照射した。次いで、紫外線照射後の試験体の色相(L* 2、a* 2、b* 2)を測定し、照射前後の色差(△E)を下記式に従って算出することにより耐変退色性を評価した。なお、評価は、○:色差1未満、△:色差1以上2未満、×:色差2以上、とした。
その結果、実施例3の塗料については「○」となり、優れた耐変退色性を示した。これに対し、比較例3の塗料では変退色の程度が大きく、その評価は「×」となった。
【0041】
<式>△E={(L* 2−L* 1)2+(a* 2−a* 1)2+(b* 2−b* 1)2}0.5
【0042】
【発明の効果】
本発明によれば、貯蔵安定性に優れ、さらに、触感、芳香性、吸放湿性等の物性に優れた塗膜が形成可能な塗料を得ることができる。
【図面の簡単な説明】
【図1】吸放湿特性値の測定方法を示すグラフ
【符号の説明】
1:吸放湿曲線
2:WD0
3:WW1
4:WD1
5:WW2
6:WD2 [0001]
BACKGROUND OF THE INVENTION
The present invention relates to a novel interior coating composition.
[0002]
[Prior art]
Plant powders made of wood, grass, etc. are natural materials and have unique tactile sensation and excellent moisture absorption / release performance, so they are expected to be used as interior materials. Yes.
For example, Japanese Patent Application Laid-Open No. 58-204059 discloses a paint in which 70 to 80% of a synthetic resin paint, 10 to 20% of a pigment, and 10% of cork powder are mixed. Yes. Japanese Patent Application Laid-Open No. 10-158549 discloses a coating material obtained by water-mixing a water-soluble polymer compound and a pulverized natural material.
However, with these prior art paints,
・ Accumates from plant powder particles during paint storage, adversely affecting paint hue
-The resin penetrates into the plant powder and the properties of the plant powder such as touch, aroma, moisture absorption and desorption are impaired.
Such a problem may occur.
[0003]
[Patent Document 1]
JP 58-204059 (Claims)
[Patent Document 2]
Japanese Patent Laid-Open No. 10-158549 (Claims)
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of the above points, and is to obtain a coating material that is excellent in storage stability and that can form a coating film that has excellent physical properties such as tactile sensation, aromaticity, and moisture absorption and desorption. It is the purpose.
[0005]
[Means for Solving the Problems]
In order to solve these problems, the present inventor has intensively studied and conceived of combining a specific resin with a vegetable powder and completed the present invention.
That is, the present invention has the following features.
1. (A) a cationic water-dispersible resin liquid having a pH of 7 or less, and
(B) vegetable powder,
An aqueous coating composition for interiors, which contains 10 to 500 parts by weight of component (B) with respect to 100 parts by weight of the solid content of component (A).
2. (B) The plant powder granules include bleached plant powder granules. The water-based paint composition for interiors described in 1.
3. (B) The plant granular material is composed of a plurality of colors of vegetable powder particles having different degrees of bleaching. The water-based paint composition for interiors described in 1.
4). 1. The water content in the aqueous coating composition is 20 to 90% by weight. ~ 3. The water-based paint composition for interior according to any one of the above.
5). Further, (C) 1 to 500 parts by weight of a coloring material is contained. ~ 4. The water-based paint composition for interior according to any one of the above.
6). (C) The coloring material is (C-1) colored powder. The water-based paint composition for interiors described in 1.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, (A) a cationic water-dispersible resin liquid having a pH of 7 or less (hereinafter referred to as “component (A)”) is used as a binder.
(A) The pH of a component is 7 or less, Preferably it is 1-6, More preferably, it is 2-4. The pH is such a value, preventing the generation of acupuncture from the plant granules during storage of the paint, and various properties of the plant granules such as tactile sensation, moisture absorption / release properties, and flexibility. It is possible to prevent the sound absorption and the like from being inhibited.
[0007]
As the component (A), a water-dispersible resin having a cationic functional group such as an amino group, an ammonium group, or a phosphonium group can be used. Specifically, for example,
(A-1) A polymer obtained by polymerizing a cationic monomer having a cationic functional group such as an amino group, an ammonium group or a phosphonium group in water together with other polymerizable monomers by a method such as emulsion polymerization;
(A-2) a polymerized monomer in water by a method such as emulsion polymerization in the presence of a cationic water-soluble resin having a cationic functional group such as an amino group, an ammonium group, or a phosphonium group;
(A-3) a polymerized monomer in water by a method such as emulsion polymerization in the presence of a cationic surfactant having a cationic functional group such as an amino group, an ammonium group or a phosphonium group;
(A-4) A cationic organic solvent-based resin having a cationic functional group such as an amino group, an ammonium group, or a phosphonium group, neutralized with an organic acid, an inorganic acid or the like, added with water, and dispersed in water;
(A-5) An organic solvent-based resin dispersed in water using a cationic surfactant having a cationic functional group such as an amino group, an ammonium group, or a phosphonium group;
Etc. Among these, (A-1), (A-2), and (A-3) are preferable in that a water-dispersible resin having a small organic solvent content can be easily produced.
[0008]
As the polymerizable monomer constituting the component (A), it is also possible to use an ultraviolet absorbing monomer. By using such a monomer, it is possible to effectively suppress the discoloration of the coating film caused by the plant powder and the aqua component contained in the plant powder and the like. Examples of the ultraviolet absorbing monomer include a cyanoacrylate ultraviolet absorbing monomer and a benzotriazole ultraviolet absorbing monomer. In addition, monomers having radical scavenging ability such as piperidyl group-containing monomers can be used.
[0009]
The minimum film-forming temperature of the component (A) is preferably 5 ° C. or lower, and more preferably 0 ° C. or lower. By employing the component (A) having such a minimum film-forming temperature, the amount of film-forming aid used can be reduced.
Although the average particle diameter of (A) component is not specifically limited, Usually, 10-500 nm, Preferably it is 20-300 nm.
[0010]
The plant powder (B) of the present invention (hereinafter referred to as “component (B)”) is obtained by pulverizing wood, grass or the like. Since the component (B) is a natural material, it is preferable as an environmentally adaptable material.
(B) As a plant used as a raw material, for example, pine, cedar, cypress, fir, zelkova, oak, lawan, hiba, kiri, beech, oak, cork oak, etc., reed, orchid, rush, rice Herbs such as wheat, kenaf, buffalo, mulberry, etc., bark, trunk, branches, leaves, roots, etc. can be used, as well as fruit peel and seeds, seaweed, sawdust, chaff, etc. You can also
Examples of the shape of component (B) include, but are not limited to, a spherical shape, a fibrous shape, a plate shape, a rod shape, and a flake shape. The size of the component (B) is not particularly limited, but in the case of a spherical powder, a particle having a particle size of approximately 0.01 to 5 mm can be used. Such (B) component can be used by 1 type (s) or 2 or more types.
Incidentally, as the component (B) in the present invention, an uncolored product is usually used.
[0011]
The component (B) usually contains a wide variety of components such as tannin, sesamin, paulonin, pinoresinol, leucoanthocyanin, acteoside and the like in addition to various sugars. Such a component is eluted as an axe during storage of the paint and may adversely affect the hue of the paint, but in the present invention, by using the above-mentioned component (A), it is possible to prevent the elution of these components. Can do. Therefore, it becomes possible to make use of the various properties of the plant powder granules as they are.
[0012]
In this invention, the bleached vegetable powder granular material can also be mixed as (B) component. As a method for bleaching the component (B), a known method may be used. Examples of the bleaching agent include sodium hypochlorite, calcium hypochlorite, hydrogen peroxide, ozone gas and the like.
When the component (B) is bleached, the whiteness of the component (B) can be adjusted according to the degree of bleaching. In the present invention, it is possible to express various hues by mixing components (B) of a plurality of colors having different bleaching degrees. At this time, an unbleached product can be mixed as the component (B).
[0013]
In the present invention, the component (B) is pretreated (flame retardant treatment, coloring treatment, etc.) as long as it does not impair the tactile sensation, fragrance, moisture absorption / release properties, flexibility, sound absorption, etc. of the component (B). It is also possible to apply. Examples of the treating agent that can be used here include those containing alkoxysilanes, silicates, organic resins, or mixtures thereof.
[0014]
In this invention composition, 10-500 weight part of (B) component is contained with respect to 100 weight part of solid content of (A) component. When the amount of the component (B) is less than 10 parts by weight, effects such as touch feeling and moisture absorption / release properties due to the component (B) cannot be obtained. When the amount is more than 500 parts by weight, the adhesion of the formed coating film may be lowered.
[0015]
In the composition of the present invention, in addition to the above-mentioned components, (C) a coloring material (hereinafter referred to as “component (C)”) can be mixed to be colored in an arbitrary hue. As the component (C), for example, (C-1) colored powder, (C-2) inorganic pigment, (C-3) organic pigment, and the like can be used.
(C-1) Examples of the colored powder particles include colored synthetic resin particles and colored wood powder. Among these, colored synthetic resin particles include, for example, pigments uniformly dispersed in synthetic resin particles, pigments localized near the surface of synthetic resin particles, and chemical dyes on synthetic resin particles. And the like bonded to the. Specifically, acrylic resin beads, urethane resin beads, polyamide resin beads, urea-formaldehyde resin beads, silicone resin beads, fluorine resin beads, phenol resin beads, melamine-formaldehyde resin beads, polyacrylonitrile beads, benzoguanamine beads, nylon beads Etc. can be used. Examples of the colored wood powder include a wood powder coated with a pigment.
(C-2) Examples of the inorganic pigment include titanium oxide, calcium carbonate, silica, alumina, zinc oxide, diatomaceous earth, talc, clay, carbon black, graphite, black iron oxide, copper chromium black, cobalt black, copper manganese iron Examples thereof include black, red pepper, and yellow iron oxide.
(C-3) Examples of organic pigments include molybdate orange, permanent red, permanent carmine, perylene red, quinacridone red, first yellow, benzimidazolone yellow, phthalocyanine green, phthalocyanine blue, quinacridone violet, dioxazine violet and the like. Can be mentioned.
[0016]
In the present invention, (C-1) colored powder is particularly suitable as the component (C). Such a component (C-1) can be easily dispersed in a paint without using a dispersant. Therefore, it becomes possible to prevent the storage stability fall by a dispersing agent and the fall of various coating-film physical properties.
[0017]
The mixing amount of the component (C) is 1 to 500 parts by weight, preferably 2 to 200 parts by weight with respect to 100 parts by weight of the solid content of the component (A). When the component (C) is less than 1 part by weight, a sufficient coloring effect cannot be obtained. When it is more than 500 parts by weight, the tactile sensation due to the component (B) may be impaired.
[0018]
In addition to the above components, in the composition of the present invention, a polyvalent metal salt (for example, a polyvalent metal sulfate, acetate, organic acid salt, silicate, etc.) or a polyvalent metal oxide is mixed. You can also. If such a component is mixed, the generation | occurrence | production of the accretion from the plant granular material during the coating-material storage can be suppressed more reliably. Examples of the polyvalent metal salt include aluminum sulfate, aluminum acetate, sodium aluminate, basic aluminum sulfate, basic aluminum chloride, aluminum stearate, aluminum oleate, condensed aluminum phosphate, zinc stearate, zinc laurate, Examples thereof include magnesium stearate and barium stearate. Examples of the polyvalent metal oxide include zinc oxide, antimony oxide, and titanium oxide. Of these, aluminum compounds such as aluminum sulfate, aluminum acetate, sodium aluminate, basic aluminum sulfate, basic aluminum chloride, aluminum stearate, and condensed aluminum phosphate are preferably used. Among these, condensed aluminum phosphate is particularly preferable.
[0019]
In the composition of the present invention, in addition to the above components, fibers having a fiber length of 0.01 to 10 mm can also be mixed. By mixing such components, it is possible to improve the workability and finish especially when the glazing is performed.
[0020]
In the composition of the present invention, an ultraviolet absorber can also be mixed. By mixing such an ultraviolet absorber, it is possible to effectively suppress discoloration of the coating film caused by the plant powder and the aqua component contained in the plant powder and the like. It is desirable to set the type, mixing amount, mixing method, and the like of the ultraviolet absorber within a range that does not substantially impair the transparency of the binder. If it is in the range which does not inhibit the transparency of a binder, the design property peculiar to a plant granular material can fully be exposed.
Specifically, examples of the ultraviolet absorber include 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-octyloxybenzophenone, 2-hydroxy-4-dodecyloxybenzophenone, 2, Benzophenone ultraviolet rays such as 2'-dihydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid, 2,2-dihydroxy-4,4'-dimethoxybenzophenone-5,5'-disulfonic acid Absorbent;
2- (2′-hydroxyphenyl) benzotriazole, 2- (2′-hydroxy-5′-methylphenyl) benzotriazole, 2- (2′-hydroxy-5′-t-butylphenyl) benzotriazole, 2, 2-methylenebis [4- (1,1,3,3-tetramethylbutyl) -6- (2H-benzotriazol-2-yl) phenol, 2-phenylbenzimidazole-5-sulfonic acid, methyl 3- ( Benzotriazole ultraviolet absorbers such as a reaction product of 3- (2H-benzotriazol-2-yl) -5-t-butyl-4-hydroxyphenyl) propionate and polyethylene glycol;
Salicylic acid ultraviolet absorbers such as phenyl salicylate, pt-butylphenyl salicylate, p-octylphenyl salicylate;
Cyanoacrylate-based ultraviolet absorbers such as 2-ethylhexyl-2-cyano-3,3'-diphenylacrylate and ethyl-2-cyano-3,3'-diphenylacrylate;
Other examples include inorganic ultraviolet absorbers such as triazine ultraviolet absorbers, oxalic acid anilide ultraviolet absorbers, aminobenzoic acid ultraviolet absorbers, cinnamic acid ultraviolet absorbers, fine titanium oxide, and fine zinc oxide. Of these, UV absorbers that are liquid at room temperature are preferably those having good compatibility with the resin.
Examples of the method of mixing the ultraviolet absorber with the composition of the present invention include a method of directly mixing, a method of mixing after dissolving in a solvent such as a film-forming aid, and a method of mixing after emulsifying with a surfactant. . Among these, when emulsifying with a surfactant, the particle size of the emulsion is desirably 3 μm or less (preferably 2 μm) or less.
The mixing amount of the ultraviolet absorber is usually about 1 to 20 parts by weight with respect to 100 parts by weight of the solid content of the component (A).
[0021]
An aldehyde adsorbent can also be mixed with the composition of the present invention. Examples of the aldehyde adsorbent include amine compounds, amide compounds, imide compounds, urea compounds, hydrazide compounds, azole compounds, azine compounds, and layered phosphate compounds. By mixing such components, indoor environmental pollution caused by formaldehyde or the like can be suppressed. In addition, formaldehyde may be generated from lignin, polysaccharides, etc., which are constituents of plant powder, depending on the type of plant powder used and its processing history. Then, it is possible to prevent such formaldehyde from being diffused into the room.
[0022]
In addition to the components described above, in the composition of the present invention, additives that can be usually used in paints, such as pigments, aggregates, dyes, thickeners, leveling agents, wetting agents, plasticizers, preservatives, and antifungal agents. , An anti-algae agent, an antibacterial agent, a surfactant, an antifoaming agent, a light stabilizer, a photocatalyst, a cross-linking agent, and the like can be mixed within a range that does not impair the effects of the present invention. In order to enhance the fire resistance of the formed coating film, for example, a phosphorus-based flame retardant, a bromine-based flame retardant, a chlorine-based flame retardant, other aluminum hydroxide, zinc borate and the like can be mixed.
[0023]
The water content in the aqueous coating composition of the present invention is usually 20 to 90% by weight, preferably 40 to 85% by weight, and more preferably 50 to 80% by weight. This makes it possible to paint without adding a large amount of water during use. In the present invention, even when such an amount of water is contained, good storage stability can be ensured.
[0024]
The pH of the entire composition of the present invention is usually 7 or less, preferably 1 to 6, and more preferably 2 to 4. When the pH of the composition of the present invention is such a value, it becomes possible to further improve the coating film properties such as the storage stability of the paint, the touch feeling, and the moisture absorption / release property.
[0025]
The composition of the present invention is mainly useful as an interior paint for buildings, and can be applied to the surfaces of various base materials constituting inner walls, ceilings and the like. Specifically, as the base material, for example, gypsum board, plywood, concrete, mortar, porcelain tile, fiber mixed cement board, cement calcium silicate board, slag cement pearlite board, asbestos cement board, ALC board, siding board, extrusion molding A plate, a steel plate, a plastic plate, etc. are mentioned. The surface of these base materials may be subjected to some surface treatment (for example, a sealer, a surfacer, a filler, etc.), or may have already been formed with a coating film or a wallpaper.
As a method for applying the composition of the present invention, a known method can be employed. For example, the composition can be applied using a coating tool such as a spray, a roller, a brush, a scissors or the like.
At the time of application, the composition of the present invention can be diluted with water. The dilution ratio is usually 0 to 100% by weight, preferably 0 to 50% by weight.
The coating amount is not particularly limited, but is usually 0.3 to 5 kg / m.2, Preferably 0.5-4 kg / m2It is.
[0026]
After coating the composition of the present invention, a transparent top coating can also be applied. The top coating contains (P) a silicone emulsion and (Q) a synthetic resin emulsion other than the above (P), and the solid content ratio of the (P) component and the (Q) component is 95: 5 to 5:95. Some top coats are preferred. By using such a top coating, stain resistance can be imparted without impairing effects such as moisture absorption / release properties of the coating film by the composition of the present invention.
In the application of the top coating material, for example, a coating tool such as a spray, a roller, or a brush can be used. The coating amount of the top coat layer is not particularly limited, but is usually 0.01 to 0.5 kg / m.2, Preferably 0.05 to 0.3 kg / m2It is.
[0027]
【Example】
Examples are given below to clarify the features of the present invention.
[0028]
(Example 1)
200 parts by weight of aqueous resin A is mixed with 200 parts by weight of kenaf powder, 500 parts by weight of a 3% by weight hydroxyethyl cellulose solution, 430 parts by weight of water, and 5 parts by weight of a silicone-based antifoaming agent. The paint was produced by stirring. The water content in this paint was 76% by weight. As the aqueous resin A, a cationic acrylic resin emulsion (styrene-methyl methacrylate-butyl acrylate-dimethylaminoethyl acrylate copolymer, pH 3.0, minimum
The following test was done about the obtained coating material.
[0029]
Storage stability
The produced paint was sealed in a container, and the appearance change when it was allowed to stand at 20 ° C. for 168 hours was visually confirmed. Further, the viscosity before and after standing was measured with a rotational viscometer, and the change in viscosity was confirmed.
[0030]
Moisture absorption / release
The coating amount is 2kg / m on the surface of 150mm x 70mm aluminum plate that has been pre-coated with sealer2The test specimens were coated with and dried for 14 days at a temperature of 20 ° C. and a humidity of 65%. In addition, as a coating material, the test body was produced using the coating material just after manufacture and the coating material after leaving to stand at 20 degreeC for 168 hours, respectively.
Weight W of the prepared specimenD0Was measured, and this was allowed to stand for 24 hours at a temperature of 20 ° C. and a humidity of 90%.W1And then left for 24 hours at a temperature of 20 ° C. and a humidity of 45%.D1Was measured. Repeat the same operation one more time, weight W in wet stateW2And dry weight WD2And measured.
Next, as shown in FIG. 1, time is plotted on the horizontal axis and weight is plotted on the vertical axis, a moisture absorption / release curve is created, and moisture absorption / release characteristic values are calculated according to the following equation to obtain the average value.
Moisture absorption W1(G) = WW1-WD0
Moisture release amount W2(G) = WW1-WD1
Moisture absorption W3(G) = WW2-WD1
Moisture release amount W4(G) = WW2-WD2
Moisture absorption and desorption characteristics (g / m2) = (W1+ W2+ W3+ W4) / {4 × (test specimen area)}
[0031]
Test results
In Example 1, no abnormality in appearance or viscosity was observed in the storage stability test. The viscosity change was less than 10%. Moreover, in Example 1, the pale yellow coating film which has a soft tactile sense was formed.
In the moisture absorption / release test, the moisture absorption / release characteristic value of the paint immediately after production is 112 g / m.2The moisture absorption / release characteristic value of the paint left at 168 ° C. for 168 hours is 115 g / m2Both showed excellent moisture absorption and desorption performance.
[0032]
(Example 2)
200 parts by weight of kenaf powder, 500 parts by weight of a 3% by weight hydroxyethyl cellulose aqueous solution, 430 parts by weight of water, 5 parts by weight of a silicone antifoaming agent, and 5 parts by weight of a silicone-based antifoaming agent A coating material was produced by mixing and stirring 10 parts by weight of resin particles and 3 parts by weight of blue synthetic resin particles. The water content in this paint was 75% by weight.
The obtained paint was subjected to the same test as in Example 1.
In Example 2, no abnormality in appearance or viscosity was observed in the storage stability test. The viscosity change was less than 10%. In Example 2, a blue-gray coating film having a soft touch was formed.
In the moisture absorption / release test, the moisture absorption / release characteristic value of the paint immediately after production is 118 g / m.2The moisture absorption / release characteristic value of the paint left at 168 ° C. for 168 hours is 120 g / m2Both showed excellent moisture absorption and desorption performance.
[0033]
(Example 3)
200 parts by weight of kenaf powder, 500 parts by weight of a 3% by weight hydroxyethyl cellulose aqueous solution, 430 parts by weight of water, 5 parts by weight of a silicone antifoaming agent, and 5 parts by weight of a silicone-based antifoaming agent A coating material was produced by mixing and stirring 10 parts by weight of resin particles, 3 parts by weight of blue synthetic resin particles, and 5 parts by weight of UV absorber A. The water content in this paint was 75% by weight.
In addition, as the ultraviolet absorber A, the reaction product (at 20 ° C.) of methyl 3- (3- (2H-benzotriazol-2-yl) -5-t-butyl-4-hydroxyphenyl) propionate and polyethylene glycol Liquid).
The obtained paint was subjected to the same test as in Example 1.
In Example 3, no abnormality in appearance or viscosity was observed in the storage stability test. The viscosity change was less than 10%. In Example 3, a blue-gray coating film having a soft touch was formed.
In the moisture absorption / release test, the moisture absorption / release characteristic value of the paint immediately after production is 116 g / m.2The moisture absorption and desorption characteristic value of the paint left for 168 hours at 20 ° C. is 122 g / m2Both showed excellent moisture absorption and desorption performance.
[0034]
(Example 4)
With respect to 200 parts by weight of the aqueous resin A, 20 parts by weight of cork powder A, 80 parts by weight of cork powder B, 480 parts by weight of a 3% by weight aqueous solution of hydroxyethyl cellulose, 160 parts by weight of water, and a silicone-based antifoaming agent 8 A coating material was produced by mixing and stirring with parts by weight. The water content in this paint was 77% by weight.
As cork powder A, unbleached cork powder (reddish brown, particle size of 1 mm or less) was used. As the cork powder B, the one obtained by bleaching the cork powder A with hydrogen peroxide (light yellow, particle size of 1 mm or less) was used.
[0035]
The obtained paint was subjected to the same test as in Example 1.
In Example 4, no abnormality in appearance or viscosity was observed in the storage stability test. The viscosity change was less than 10%.
Moreover, in Example 4, the coating film of the external appearance in which reddish brown was scattered on the pale yellow ground was formed. This coating film had a soft touch.
In the moisture absorption / release test, the moisture absorption / release characteristic value of the paint immediately after production is 54 g / m.2The moisture absorption and desorption characteristic value of the paint left for 168 hours at 20 ° C. is 58 g / m2Both showed excellent moisture absorption and desorption performance.
[0036]
(Example 5)
With respect to 200 parts by weight of the aqueous resin A, 20 parts by weight of cork powder A, 80 parts by weight of cork powder B, 460 parts by weight of a 3% by weight aqueous solution of hydroxyethyl cellulose, 160 parts by weight of water, and a silicone-based antifoaming agent 8 A paint was produced by mixing and stirring parts by weight and 40 parts by weight of black wood powder. The water content in this paint was 73% by weight.
The obtained paint was subjected to the same test as in Example 1.
In Example 5, no abnormality in appearance or viscosity was observed in the storage stability test. The viscosity change was less than 10%.
In Example 5, a black coating film having a soft touch was formed.
In the moisture absorption / release test, the moisture absorption / release characteristic value of the paint immediately after production is 55 g / m.2The moisture absorption and desorption characteristic value of the paint left at 168 ° C. for 168 hours is 60 g / m2Both showed excellent moisture absorption and desorption performance.
[0037]
(Comparative Example 1)
200 parts by weight of aqueous resin B is mixed with 200 parts by weight of kenaf powder, 500 parts by weight of a 3% by weight hydroxyethyl cellulose solution, 430 parts by weight of water, and 5 parts by weight of a silicone-based antifoaming agent. The paint was produced by stirring. The water content in this paint was 76% by weight. As the aqueous resin B, an anionic acrylic resin emulsion (styrene-methyl methacrylate-butyl acrylate copolymer, pH 8.0, minimum film forming temperature 4 ° C., solid content 50% by weight) was used.
The obtained paint was subjected to the same test as in Example 1.
In Comparative Example 1, the paint that was initially pale yellow turned black after storage. Further, the viscosity after storage increased by 50% or more compared with before storage.
In the moisture absorption / release test, the moisture absorption / release characteristic value of the paint immediately after production is 114 g / m.2However, the moisture absorption and desorption characteristic value of the paint left at 168 ° C. for 168 hours is 88 g / m.2It has fallen greatly.
[0038]
(Comparative Example 2)
100 parts by weight of cork powder A as a vegetable powder, 480 parts by weight of a 3% by weight hydroxyethyl cellulose solution, 160 parts by weight of water, and 8 parts by weight of a silicone-based antifoaming agent are mixed with 200 parts by weight of the aqueous resin B. The paint was produced by stirring. The water content in this paint was 77% by weight.
The obtained paint was subjected to the same test as in Example 1.
In Comparative Example 2, the paint, which was initially reddish brown, turned black after storage. Further, the viscosity after storage increased by 50% or more compared with before storage.
In the moisture absorption / release test, the moisture absorption / release characteristic value of the paint immediately after production is 55 g / m.2However, the moisture absorption and desorption characteristic value of the paint left at 168 ° C. for 168 hours was 38 g / m.2It has fallen greatly.
[0039]
(Comparative Example 3)
200 parts by weight of kenaf powder, 500 parts by weight of a 3% by weight hydroxyethyl cellulose aqueous solution, 430 parts by weight of water, 5 parts by weight of a silicone-based antifoaming agent, and white synthetic resin, based on 200 parts by weight of aqueous resin B A coating material was produced by mixing and stirring 10 parts by weight of resin particles and 3 parts by weight of blue synthetic resin particles. The water content in this paint was 75% by weight.
The obtained paint was subjected to the same test as in Example 1.
In Comparative Example 3, the paint that was initially blue-gray turned black after storage. Further, the viscosity after storage increased by 50% or more compared with before storage.
In the moisture absorption / release test, the moisture absorption / release characteristic value of the paint immediately after production is 115 g / m.2However, the moisture absorption and desorption characteristic value of the paint left at 168 ° C. for 168 hours is 81 g / m2It has fallen greatly.
[0040]
Anti-fading resistance
The coating amount of 2 kg / m each of the coating material of Example 3 and the coating material of Comparative Example 3 is applied to the surface of a 150 mm × 70 mm aluminum plate on which a sealer has been applied in advance.2The test specimens were coated with and dried for 14 days at a temperature of 20 ° C. and a humidity of 65%. In addition, as a coating material, the coating material immediately after manufacture was used for all.
Initial hue of test specimen (L* 1, A* 1, B* 1) Was measured using a color difference meter “CR-300” (manufactured by Minolta Co., Ltd.), and then an ultraviolet lamp GL-15 (ultraviolet output 15 W) was irradiated from a distance of 30 cm for 168 hours. Next, the hue (L* 2, A* 2, B* 2) Was measured, and the color difference (ΔE) before and after irradiation was calculated according to the following formula to evaluate the color fading resistance. The evaluations were as follows: ◯: less than 1 color difference, Δ: 1 to less than 2 color difference, x: 2 or more color difference.
As a result, the coating material of Example 3 was “◯”, indicating excellent resistance to discoloration and fading. On the other hand, in the paint of Comparative Example 3, the degree of discoloration was large, and the evaluation was “x”.
[0041]
<Formula> ΔE = {(L* 2-L* 1)2+ (A* 2-A* 1)2+ (B* 2-B* 1)2}0.5
[0042]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the coating material which is excellent in storage stability and can form the coating film excellent in physical properties, such as a touch feeling, aromaticity, moisture absorption / release property, can be obtained.
[Brief description of the drawings]
FIG. 1 is a graph showing a method for measuring moisture absorption / release characteristics.
[Explanation of symbols]
1: Moisture absorption and desorption curve
2: WD0
3: WW1
4: WD1
5: WW2
6: WD2
Claims (7)
(B)無着色植物性粉粒体、を含有し、(A)成分の固形分100重量部に対し、(B)成分を10〜500重量部含有することを特徴とする内装用水性塗料組成物。(A) a cationic water-dispersible resin solution having a pH of 7 or less, and (B) an uncolored vegetable powder and a component (B) of 10 to 10 parts by weight with respect to 100 parts by weight of the solid content of the component (A). An aqueous coating composition for interiors, containing 500 parts by weight.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004359797A (en) * | 2003-06-04 | 2004-12-24 | Sk Kaken Co Ltd | Water paint composition for interior use |
| CN107033717A (en) * | 2015-12-26 | 2017-08-11 | 日本Sk化研株式会社 | Water-based coating material |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100610431B1 (en) | 2004-10-02 | 2006-08-09 | 기아자동차주식회사 | Car Seat Slide |
| WO2008018616A1 (en) * | 2006-08-09 | 2008-02-14 | Kansai Paint Co., Ltd. | Aqueous coating composition and coated article |
| JP4654257B2 (en) * | 2008-03-03 | 2011-03-16 | 大谷塗料株式会社 | Woodwork paint |
| KR101051542B1 (en) * | 2009-02-06 | 2011-07-22 | 우경헌 | Functional natural finish |
| WO2011078504A2 (en) * | 2009-12-21 | 2011-06-30 | Park Keun Yong | Board-like cork material and method for producing the same |
| CN106752502A (en) * | 2015-12-26 | 2017-05-31 | 日本Sk化研株式会社 | Water-based coating material |
| JP2021091790A (en) * | 2019-12-10 | 2021-06-17 | 三菱ケミカル株式会社 | Coating agent composition and coating layer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004359797A (en) * | 2003-06-04 | 2004-12-24 | Sk Kaken Co Ltd | Water paint composition for interior use |
| CN107033717A (en) * | 2015-12-26 | 2017-08-11 | 日本Sk化研株式会社 | Water-based coating material |
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