JP2004203906A - Metallic glossy tone, thermochromic molding resin composition and molded product using the same - Google Patents

Metallic glossy tone, thermochromic molding resin composition and molded product using the same Download PDF

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JP2004203906A
JP2004203906A JP2002371203A JP2002371203A JP2004203906A JP 2004203906 A JP2004203906 A JP 2004203906A JP 2002371203 A JP2002371203 A JP 2002371203A JP 2002371203 A JP2002371203 A JP 2002371203A JP 2004203906 A JP2004203906 A JP 2004203906A
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molding
metallic
thermochromic
resin composition
pigment
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JP2002371203A
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Japanese (ja)
Inventor
Michiyuki Yasuda
満行 安田
Yutaka Shibahashi
裕 柴橋
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Pilot Ink Co Ltd
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Pilot Ink Co Ltd
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Priority to JP2002371203A priority Critical patent/JP2004203906A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a metallic glossy tone, thermochromic molding resin composition which is rich in brightness, presents a unique glittering metallic glossy color, and visualizes a variegated aspect by the change in temperature, and a molded product which uses the above resin composition and visualizes a unique metallic glossy color and a variegated aspect by the change in temperature. <P>SOLUTION: The metallic glossy tone, thermochromic molding resin composition comprises a metallic luster pigment obtained by coating the surface of a leaf aluminum oxide with a metal oxide, a reversible thermochromic material comprising an electron-donating color developable organic compound, an electron-accepting compound, and an organic compound medium which reversibly causes the color development reaction between the above both as three essential components, and a molding resin. The metallic glossy tone, thermochromic molded product is obtained by molding the above resin composition by injection molding, extrusion molding, blow molding or casting. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は金属光沢調熱変色性成形用樹脂組成物及びそれを用いた成形体に関する。更に詳細には、温度変化による色変化と共に金色、銀色、メタリック色等の輝度の高い金属光沢を呈する金属光沢調熱変色性成形体及び前記成形体の製造に適用される樹脂組成物に関する。
【0002】
【従来の技術】
金属光沢調を呈する熱変色性樹脂組成物に関して、本出願人による幾つかの提案が既に開示されている(例えば、特許文献1参照)。
前記提案は、天然雲母の表面を酸化チタンで被覆した金属光沢調顔料と可逆熱変色性材料を樹脂中にブレンドしたものであり、金属光沢調の色変化を呈するため、示温、装飾、玩具要素等、多様な分野に適用性を有している。
【0003】
【特許文献1】
特開平6−107851号公報
【0004】
【発明が解決しようとする課題】
本発明者らは、この種の金属光沢調熱変色性樹脂組成物の視覚効果について更に検討した結果、薄片状酸化アルミニウムの表面を金属酸化物で被覆した金属光沢顔料を用いることによって、光輝性に富み、キラキラ光る特異な金属光沢色を有しながら、温度変化により多彩な様相を視覚させる新たな金属光沢調熱変色性成形用樹脂組成物及びそれを用いた成形体を見いだした。
【0005】
【課題を解決するための手段】
本発明は、薄片状酸化アルミニウムの表面を金属酸化物で被覆した金属光沢顔料と、電子供与性呈色性有機化合物、電子受容性化合物、及び前記両者の呈色反応を可逆的に生起させる有機化合物媒体を必須三成分として含む可逆熱変色性材料と、成形用樹脂とからなる金属光沢調熱変色性成形用樹脂組成物を要件とする。
更には、前記金属光沢顔料は、薄片状酸化アルミニウムの表面を酸化チタンを主成分とする金属酸化物で被覆した顔料であること、前記薄片状酸化アルミニウムの表面を金属酸化物で被覆した金属光沢顔料は、平均の厚みが0.1〜5μmであり、平均粒子径が2〜200μmであること、可逆熱変色性材料は、前記必須三成分を含む組成物をマイクロカプセルに内包させたマイクロカプセル形態の顔料であること、成形用樹脂100重量部に対し、金属光沢顔料0.1〜39重量部、可逆熱変色性材料0.5〜39重量部の割合でブレンドされていると共に、前記金属光沢顔料/可逆熱変色性材料=0.05/1〜40/1(重量比)を満たすことを要件とする。
更には、前記金属光沢調熱変色性成形用樹脂組成物を使用して射出成形、押出成形、ブロー成形、又は注型成形の何れかにより成形された金属光沢調熱変色性成形体を要件とする。
【0006】
【発明の実施の形態】
本発明は、薄片状酸化アルミニウムの表面を金属酸化物で被覆した金属光沢顔料を適用したことを特徴としたものであり、従来の天然雲母の表面を酸化チタンで被覆した金属光沢顔料を適用する系に較べ、太陽光の下では顕著にキラキラと光る、金属光沢性の光輝効果を発現させ、しかも前記光輝効果が遠近感と立体感を伴った様相として視覚され、併存の可逆熱変色性材料の温度変化による変色効果とが織りなす多彩な様相を現出させ、特異性と装飾性を満足させる。
前記効果を補足説明すれば、前記金属光沢顔料は、個々の顔料が部分的に重なり合ったりして、非平面状態に存在するため、光輝性と色調が微妙に変化し、全体として立体感を有する多様な様相を視覚させる。ここで、前記個々の顔料が重なり合った部分にあっても、顔料自体の透明性に依存して、本来の金属光沢性の光輝効果が損なわれることなく、有効に発現できる。
【0007】
前記金属光沢顔料の芯物質として薄片状酸化アルミニウムを用いると、従来より汎用の天然雲母と比較して不純物の含有量が少なく、金属光沢性は酸化チタンに代表される金属酸化物で被覆することにより、前記金属酸化物の被覆率によって金色、銀色、或いは、メタリック色の金属光沢を呈する。
従って、酸化アルミニウムを金属酸化物で被覆した金属光沢顔料については、光輝性に富むと共に透明性にも優れるため、可逆熱変色性材料の色調を明瞭に視認することができる。
前記酸化アルミニウムの表面を被覆する金属酸化物としては、チタン、ジルコニウム、クロム、バナジウム、鉄等の金属酸化物を例示できるが、好適には酸化チタンを主成分とする金属酸化物が挙げられる。
前記金属光沢顔料は平均の厚みが0.1〜5μmであり、平均粒子径が2〜200μmである。
前述の厚みと平均粒子径を示す金属光沢顔料を用いることにより、金属光沢顔料の光輝性と可逆熱変色性材料の変色による明瞭な色変化を呈することができる。
前記平均粒子径は、レーザー回折法平均粒子径を示し、体積基準のメジアン径が累積分布の50%に相当する粒子径である。
【0008】
前記薄片状酸化アルミニウムの表面を金属酸化物で被覆した金属光沢顔料として具体的には、メルク社製の商品名「シラリック」品番:T50−10(10〜30μm:銀色)、T60−10WNT(10〜30μm:銀色)、T60−20WNT(10〜30μm:金色)、T60−21WNT(10〜30μm:メタリックレッド)、T60−23WNT(10〜30μm:メタリックブルー)、T60−24WNT(10〜30μm:メタリックグリーン)を例示できる。括弧内は平均粒子径及び色調を示す。
【0009】
前記可逆熱変色性材料は、電子供与性呈色性有機化合物と電子受容性化合物と呈色反応を可逆的に生起させる有機化合物媒体の三成分を含む可逆熱変色性組成物が好適に用いられる。具体的には、本出願人が提案した、特公昭51−44706号公報、特公昭51−44707号公報、特公平1−29398号公報等に記載のものが利用できる。
前記は所定の温度(変色点)を境としてその前後で変色し、変色点以上の温度域で消色状態、変色点未満の温度域で発色状態を呈し、前記両状態のうち、常温域では特定の一方の状態しか存在しえない。即ち、もう一方の状態は、その状態が発現するのに要する熱又は冷熱が適用されている間は維持されるが、前記熱又は冷熱の適用がなくなれば常温域で呈する状態に戻る、ヒステリシス幅が比較的小さい熱変色挙動を示す加熱消色型可逆熱変色性材料である。
又、本出願人が提案した特公平4−17154号公報、特開平7−179777号公報、特開平7−33997号公報、特開平8−39936号公報等に記載されている大きなヒステリシス特性を示す、即ち、温度変化による着色濃度の変化をプロットした曲線の形状が、温度を変色温度域より低温側から上昇させていく場合と逆に変色温度より高温側から下降させていく場合とで大きく異なる経路を辿って変色し、低温側変色点以下の温度域での発色状態、或いは高温側変色点以上の温度域での消色状態が、前記変色に要した冷熱又は熱の適用を取り去った後にあっても、前記両変色点の間の常温域で互変的に記憶保持できる色彩記憶型可逆熱変色性材料を利用できる。
又、本出願人が提案した特開平11−129623号公報、特開平11−5973号公報等に記載の、電子受容性化合物として、炭素数3乃至18の直鎖又は側鎖アルキル基を有する特定のアルコキシフェノール化合物を適用した加熱発色型可逆熱変色性材料を適用することもできる。
【0010】
前記した可逆熱変色性材料は、前記必須三成分からなる組成物として適用することもできるが、顔料形態、例えば、前記組成物をバインダー樹脂と共にブレンドして得た微細粒状物、前記微細粒状物の表面を別の樹脂で被覆したもの、前記組成物をマイクロカプセルに内包させたマイクロカプセル形態の顔料が好適に用いられる。
なかでも、マイクロカプセル形態の顔料は、鮮明且つ高濃度の発色性、均質性、分散安定性、耐薬品性等を満たし、実用的に好適である。尚、マイクロカプセル化は、従来より公知の界面重合法、in Situ重合法、液中硬化被覆法、水溶液からの相分離法、有機溶媒からの相分離法、融解分散冷却法、気中懸濁被覆法、スプレードライング法等の適用により実施できる。
前記顔料の表面には、目的に応じて更に二次的な樹脂皮膜を設けて耐久性を付与させたり、表面特性を改質させて実用に供することもできる。
前記マイクロカプセル形態の顔料にあっては、平均粒子径〔(長径+短径)/2〕が、0.1〜100μm、好ましくは、0.5〜30μm、更に好ましくは、0.5〜20μmの範囲にあることが、変色の鋭敏性、持久性、加工適性等の面で有効である。
なお、前記可逆熱変色性材料には、非熱変色性の染料や顔料を適宜ブレンドして多彩化することができる。
【0011】
前記成形用樹脂としては、従来より汎用の熱可塑性樹脂や熱硬化性樹脂等が適宜、目的に応じて適用される。
熱可塑性樹脂としては、直鎖状低密度ポリエチレン、低密度ポリエチレン、中高密度ポリエチレン、超高密度ポリエチレン、塩素化ポリエチレン、ポリプロピレン、塩素化ポリプロピレン、ポリイソブチレン、ポリブタジエン、ポリメチルペンテン、ポリスチレン、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリ酢酸ビニル、塩化ビニル樹脂、塩素化ポリ塩化ビニル、ポリ塩化ビニリデン、アクリル酸エステル樹脂、メタクリル酸エステル樹脂、ポリアミド、共重合ポリアミド、ポリアミドイミド、ポリアセタール、ポリビニルホルマール、ポリビニルブチラール、ポリアリレート、ポリエーテルイミド、ポリエーテルエーテルケトン、ポリカーボネート、ポリフェニルエーテル、ポリフェニレンサルファイド、ポリサルホン、フッ素樹脂、アイオノマー樹脂、エチレン−プロピレン共重合樹脂、エチレン−酢酸ビニル共重合樹脂、エチレン−ビニルアルコール共重合樹脂、エチレン−アクリル酸エステル共重合樹脂、エチレン−メタクリル酸エステル共重合樹脂、エチレン−塩化ビニル共重合樹脂、塩化ビニル−プロピレン共重合樹脂、塩化ビニル−塩化ビニリデン共重合樹脂、スチレン−ブタジエン共重合樹脂、アクリロニトリル−塩化ビニリデン共重合樹脂、アクリロニトリル−スチレン共重合樹脂、アクリロニトリル−エチレン−スチレン共重合樹脂、アクリロニトリル−ブタジエン−スチレン共重合樹脂、アクリロニトリル−塩素化ポリエチレン−スチレン共重合樹脂、アクリロニトリル−アクリル酸エステル−スチレン共重合樹脂、エチレン−酢酸ビニル樹脂−塩化ビニルグラフト共重合樹脂、メタクリル酸メチル−ブタジエン−スチレン共重合樹脂、スチレン系熱可塑性エラストマー、オレフィン系熱可塑性エラストマー、ウレタン系熱可塑性エラストマー、ポリエステル系熱可塑性エラストマー、1,2−ポリブタジエン系熱可塑性エラストマー、塩化ビニル系熱可塑性エラストマー、石油系炭化水素樹脂、セルロースアセテート、セルロースアセテートプロピオネート、セルロースアセテートブチレート、ニトロセルロース、低分子量ポリエチレン、低分子量ポリプロピレン、ポリブテン、クマロン−インデン共重合物、フェノキシプラスチック等を挙げることができ、ペレット、粉末等の形態となして、射出成形、押出成形、ブロー成形、注型成形等に適用する。尚、注型成形としては、アルキルフェノール樹脂、ロジン変性フェノール樹脂、アルキド樹脂、塩化ビニル−酢酸ビニル樹脂、スチレンブタジエン樹脂、エポキシ樹脂、アクリル酸エステル樹脂、不飽和ポリエステル樹脂、セルローズ誘導体等の樹脂を、水や有機溶剤に溶解又は分散させた状態で適用することもできる。又、プラスチゾル用の塩化ビニル系、又は塩化ビニル−酢酸ビニル系樹脂等にあっては、ペースト状態となして、注型成形することができる。
熱硬化性樹脂としては、エポキシ樹脂、キシレン樹脂、トルエン樹脂、グアナミン樹脂、エポキシアクリレート、フェノール樹脂、不飽和ポリエステル樹脂、フラン樹脂、ポリイミド、ポリ(p−ヒドロキシ安息香酸)、ポリウレタン、尿素樹脂、メラミン樹脂、シリコーン樹脂等を挙げることができ、注型成形等により成形体を得ることができる。
【0012】
ここで、前記成形用樹脂100重量部に対し、金属光沢顔料0.1〜39重量部(好ましくは、1〜10重量部)、可逆熱変色性材料0.5〜39重量部(好ましくは、1〜10重量部)の割合でブレンドされていると共に、前記金属光沢顔料/可逆熱変色性材料=0.05/1〜40/1(重量比)、好ましくは、0.5/1〜30/1の重量比にあることが好ましい。
前記重量割合を満たすことにより、光輝性と色変化の織りなす多様な様相変化を効果的に発現させることができると共に成形体としての形態保持性を維持できる。
【0013】
前記のようにして得られる金属光沢調熱変色性成形用樹脂組成物は、ペレット、粉末、又はペースト形態として、汎用の射出成形、押出成形、ブロー成形、又は注型成形等の手段により、任意形象の立体造形物、フイルム、シート、板、フィラメント、棒状物、パイプ等の形態の成形体として実用に供される。
なお、前記成形体の上層にはトップコート層を設けて耐久性や耐水性を向上させることもできる。
更に、前記した成形体の最上層、或いは、各層間には光安定剤層を適宜設けることができる。具体的には、前記光安定剤層は紫外線吸収剤、酸化防止剤、老化防止剤、一重項酸素消光剤、スーパーオキシドアニオン消光剤、オゾン消色剤、可視光線吸収剤、赤外線吸収剤から選ばれる光安定剤を分散状態に固着した層である。前記最上層に光安定剤層を設けると耐久性や耐水性に加えて可逆熱変色性材料の耐光性も付与できるため、より好適である。
【0014】
【実施例】
次に、具体的に実施例を示す。実施例中の部は重量部である。
【0015】
実施例1
薄片状酸化アルミニウムの表面を酸化チタンで被覆した金色金属光沢顔料〔メルク(株)製、商品名:シラリックT60−20WNT Sunbeam Gold、平均粒子径10〜30μm〕40部、平均粒子径15μmのマイクロカプセル形態の可逆熱変色性材料20部、ベンゾトリアゾール系紫外線吸収剤2部、ビカット軟化点119℃の高密度ポリエチレン1000部を均一に混合した後、押出成形機を用いて、シリンダー温度165℃、ゲート温度160℃の条件で成形し、常法により成形用ペレット(金属光沢調熱変色性成形用樹脂組成物)を得た。
前記ペレットを使用し、ブロー成形機によりシリンダー温度175℃の条件で厚さ約2mm、外径5cmの金属光沢調熱変色性球体をブロー成形した。
前記球体は、15℃以下で可逆熱変色性材料が黒色に発色して、入射光の一部である550〜600nmの波長の光を反射し、それ以外の波長の光を吸収すると、金色の金属光沢色となり、30℃以上で可逆熱変色性材料が消色して、透過光を反射すると、入射光全てを反射することになり、金色金属光沢色は消えて無色となり、25℃の室温下においては、前記発色状態又は消色状態における各様相が互変的に記憶保持されており、択一的に視覚される。
尚、前記可逆熱変色性材料は、2−アニリノ−3−メチル−6−ジブチルアミノフルオラン3部、4,4′−(2−メチル−プロピリデン)ビスフェノール6部、ステアリン酸ネオペンチル50部の相溶体からなる可逆熱変色性組成物をエポキシ樹脂/アミン硬化剤の界面重合法によるカプセル化で得られたものであり、二つの変色点(低温側変色点:15℃、高温側変色点:30℃)をもつ色彩記憶型可逆熱変色性材料である。
【0016】
実施例2
実施例1の金色金属光沢顔料に替えて、薄片状酸化アルミニウムの表面を酸化チタンで被覆した銀色金属光沢顔料〔メルク(株)製、商品名:シラリックT50−10 Crystal Silver、平均粒子径10〜30μm〕を適用した以外は実施例1と同様にして成形用ペレットを得た。
次いで、実施例1と同様にして、ブロー成形により金属光沢調熱変色性球体を得た。
前記球体は、15℃以下で可逆熱変色性材料が黒色に発色して、入射光の可視光線の一部である光を反射し、それ以外の波長の光を吸収すると、銀色の金属光沢色となり、30℃以上で可逆熱変色性材料が消色して、透過光を反射すると、入射光の全てを反射することになり、銀色金属光沢色は消え無色となり、25℃の室温下においては、前記発色状態又は消色状態における各様相が互変的に記憶保持されており、択一的に視覚される。
【0017】
実施例3
実施例1の金色金属光沢顔料40部及び可逆熱変色性材料20部、蛍光ピンク顔料1.5部、ベンゾトリアゾール系紫外線吸収剤2部、ビカット軟化点100℃のポリプロピレン1000部を均一に混合した後、押出成形機を用いて常法により成形用ペレットを得た。
前記ペレットを使用し、射出成形機によりミニチュアカーの金属光沢調熱変色性ボディを成形した。
前記ボディーは、15℃以下で可逆熱変色性材料が発色して、入射光の一部である550〜600nmの波長の光を反射し、それ以外の波長の光を吸収すると、金色の金属光沢色となり、30℃以上て可逆熱変色性材料が消色すると金色金属光沢色は消え、蛍光ピンク顔料の色となり、25℃の室温下においては、前記発色状態又は消色状態における各様相が互変的に記憶保持されており、択一的に視覚される。
【0018】
実施例4
実施例1の金色金属光沢顔料40部及び可逆熱変色性材料20部と、青色顔料0.2部と白色顔料0.6部、ベンゾトリアゾール系紫外線吸収剤2部、ビカット軟化点105℃のリニア低密度ポリエチレン1000部を均一に混合した後、押出成形機を用いて、常法により2〜3mmのペレットを得た。
前記ペレットを使用し、押出成形機によりシリンダー温度180℃の条件でシート成形を行ない、厚さ約1mmの金属光沢調熱変色性シートを得た。
前記シートは15℃以下で可逆熱変色性材料が発色して、入射光の一部である550〜600nmの波長の光を反射し、それ以外の波長の光を吸収すると、金色の金属光沢色となり、30℃以上で可逆熱変色性材料が消色すると金色金属光沢色は消え、青色顔料と白色顔料の混合色であるパステルブルーを呈し、25℃の室温下においては、前記発色状態又は消色状態における各様相が互変的に記憶保持されており、択一的に視覚される。
【0019】
実施例5
薄片状酸化アルミニウムの表面を酸化チタンで被覆したメタリックブルー色金属光沢顔料〔メルク(株)製、商品名:シラリックT60−23WNT、Galaxy Blue、平均粒子径10〜30μm〕30部、実施例1の可逆熱変色性材料20部、蛍光イエロー顔料10部、ベンゾトリアゾール系紫外線吸収剤5部、エポキシ樹脂700部、及びアミン系硬化剤250部を均一に混合した後、ハート型の注型用型に注ぎ、70℃で1時間硬化させて、ハート型の金属光沢調熱変色性成形体を得た。
前記ハート型成形体は、15℃以下で可逆熱変色性材料が発色して、入射光の可視光線の一部である430〜500μmの青色の光を反射し、それ以外の波長の光を吸収すると,メタリックブルー色の金属光沢色となり、30℃以上で可逆熱変色性材料が消色するとメタリックブルー色の金属光沢色は消え、蛍光イエロー顔料の色となり、25℃の室温下で前記発色状態又は消色状態における各様相が互変的に記憶保持されており、択一的に視覚される。
【0020】
実施例6
薄片状酸化アルミニウムの表面を酸化チタンで被覆したメタリックグリーン色金属光沢顔料〔メルク(株)製、商品名:シラリックT60−24WNT、Stellar Green、平均粒子径10〜30μm〕30部、実施例1の可逆熱変色性材料20部、ベンゾトリアゾール系紫外線吸収剤2部、ビカット軟化点100℃のポリプロピレン1000部を均一に混合した後、押出成形機を使用して、シリンダー温度165℃、ゲート温度160℃の条件で成形し、常法により成形用ペレットを得た。
次いで前記ペレットを用いて、実施例3と同様にしてミニチュアカーの金属光沢調熱変色性ボディを成形した。
前記ボディは、15℃以下で可逆熱変色性材料が発色して入射光の一部である500〜540nmの波長の反射光を反射し、それ以外の波長の透過光を吸収するため、キラキラとした輝度の高いメタリックグリーン色の金属光沢色が視覚され、32℃で可逆熱変色性材料が消色して透過光を反射するため、入射光の全ての波長を反射することになり、輝度の高い金属光沢色は視覚されず、透明性ボディを視覚させた。
【0021】
実施例7
薄片状酸化アルミニウムの表面を酸化チタンで被覆したメタリックレッド色金属光沢顔料〔メルク(株)製、商品名:シラリックT60−21WNT、Salaris Red、平均粒子径10〜30μm〕60部と、可逆熱変色性材料30部、スチレン−ブタジエン共重合樹脂(メルトフローレート7.3)1000部、紫外線吸収剤10.0重量部、金属石鹸系滑剤0.5重量部を混合し、タンブラーミキサーで均一に分散した後、押出成形機を用いて成形用ペレットを得た。
前記ペレットを用い、イルカ型の金型を使用して射出成形により、金属光沢調熱変色性イルカを得た。
前記イルカは、20℃以下ではキラキラとした輝度の高いメタリックレッド色の金属光沢色が視覚され、20℃以上では輝度の高い金属光沢色は視覚されず、透明性を有するイルカとして視覚される。
尚、前記可逆熱変色性材料は、6−ジエチルアミノ−ベンゾ(a)−フルオラン1.5部、4,4′−(2−メチル−プロピリデン)ビスフェノール6部、ミリスチルアルコール25部、カプリン酸セチル25部の相溶体からなる可逆熱変色性組成物をエポキシ樹脂/アミン硬化剤の界面重合法によるカプセル化で得られた平均粒子径8μmの加熱消色型可逆熱変色性材料である。
【0022】
実施例8
実施例1の金色金属光沢顔料20部、可逆熱変色性材料20部、ベンゾトリアゾール系紫外線吸収剤2部、ビカット軟化点100℃のポリプロピレン1000部を均一に混合した後、押出成形機を用いて、シリンダー温度165℃、ゲート温度160℃の条件で成形し、常法により成形用ペレットを得た。
前記ペレットを使用し、射出成形機により厚さ3mm、縦5cm、横5cmの星型の金属光沢調熱変色性成形体を得た。
前記星型成形体は、15℃以下ではキラキラとした輝度の高いメタリックイエロー色の金属光沢色が視覚され、32℃以上では可逆熱変色性材料が消色して透過光を反射するため、入射光の全ての波長を反射することになり、輝度の高い金属光沢色は視覚されず透明性ボディを視覚させた。
尚、上記可逆熱変色性材料は、2、6−ビス(2′−エトキシフェニル)−4−(4′−ジメチルアミノフェニル)−ピリジン1.5部、2、2′−ビス(4′−ヒドロキシフェニル)ヘキサフルオロプロパン8部、ステアリン酸ネオペンチル50部の相溶体からなる可逆熱変色性組成物をエポキシ樹脂/アミノ硬化剤の界面重合法によるカプセル化で得られた平均粒子径10μmの加熱消色型可逆熱変色性材料である。
【0023】
実施例9
実施例5のメタリックブルー色金属光沢顔料20部、可逆熱変色性材料20部、蛍光ピンク顔料1.5部、ベンゾトリアゾール系紫外線吸収剤5部、ポリスチレンブロックとポリオレフィン構造のエラストマーブロックで構成されるブロック共重合体エラストマー(破断伸度:1200%、スチレン含有量:13%)1000部を均一に混合した後、押出成形機を使用してシリンダー温度200℃、ゲート温度200℃の条件で常法により成形用ペレットを得た。
前記ペレットを使用し、射出成形機により、シリンダー温度220℃の条件でクモの形態を模した金属光沢調熱変色性クモ玩具を成形した。
前記クモ玩具は、30℃未満ではキラキラした輝度の高いメタリックブルー色の金属光沢色が視覚され、30℃以上では輝度の高い金属光沢色は視覚されることもなく、明瞭な蛍光ピンク色が視覚された。
尚、前記可逆熱変色性材料は、3−(4−ジエチルアミノ−2−エトキシフェニル)−3−(1−エチル−2−メチルインドール−3−イル)−4−アザフタリド1部、4、4′−(2−メチル−プロピリデン)ビスフェノール6部、セチルアルコール25部、カプリン酸セチル25部の相溶体からなる可逆熱変色性組成物をエポキシ樹脂/アミン硬化剤の界面重合法によるカプセル化で得られた平均粒子径8μmの加熱消色型可逆熱変色性材料である。
【0024】
【発明の効果】
本発明の樹脂組成物を適用することにより、温度変化による色彩変化と金属光沢性の光輝効果とが織りなす多彩な様相を呈し、前記様相変化が透明性と立体感を伴った様相として視覚される、特異な金属光沢調熱変色性成形体を供給でき、玩具要素、装飾要素、示温要素、差別化要素等、多様な分野に適用される。
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a resin composition for molding a metallic glossy thermochromic composition and a molded article using the same. More specifically, the present invention relates to a metallic luster thermochromic molded article exhibiting metallic luster such as gold, silver, and metallic colors with a color change due to a temperature change, and a resin composition applied to the production of the molded article.
[0002]
[Prior art]
Regarding the thermochromic resin composition exhibiting a metallic glossy tone, several proposals by the present applicant have already been disclosed (for example, see Patent Document 1).
The proposal is a blend of a metallic gloss pigment and a reversible thermochromic material in which the surface of natural mica is coated with titanium oxide and a reversible thermochromic material, and exhibits a metallic gloss color change. It has applicability in various fields such as.
[0003]
[Patent Document 1]
JP-A-6-107851
[Problems to be solved by the invention]
The present inventors further studied the visual effect of this kind of metallic luster thermochromic resin composition, and found that by using a metallic luster pigment in which the surface of flaky aluminum oxide was coated with a metal oxide, the luster was increased. A new resin composition for forming a metallic luster thermochromic molding and a molded article using the same, which has a unique metallic luster color that is rich and brilliant while allowing various aspects to be visualized by temperature changes while having a unique metallic luster color.
[0005]
[Means for Solving the Problems]
The present invention provides a metallic luster pigment in which the surface of flaky aluminum oxide is coated with a metal oxide, an electron-donating color-forming organic compound, an electron-accepting compound, and an organic compound that reversibly causes a color reaction between the two. A requirement is a metal glossy thermochromic molding resin composition comprising a reversible thermochromic material containing a compound medium as the essential three components and a molding resin.
Further, the metallic luster pigment is a pigment in which the surface of flaky aluminum oxide is coated with a metal oxide containing titanium oxide as a main component, and the metallic luster in which the surface of the flaky aluminum oxide is coated with a metal oxide. The pigment has an average thickness of 0.1 to 5 μm, an average particle diameter of 2 to 200 μm, and the reversible thermochromic material is a microcapsule in which the composition containing the essential three components is encapsulated in a microcapsule. The pigment is in the form of being blended in a ratio of 0.1 to 39 parts by weight of a metallic gloss pigment and 0.5 to 39 parts by weight of a reversible thermochromic material with respect to 100 parts by weight of a molding resin. It is required that gloss pigment / reversible thermochromic material = 0.05 / 1 to 40/1 (weight ratio) be satisfied.
Further, a metal gloss thermochromic molded article formed by injection molding, extrusion molding, blow molding, or cast molding using the resin composition for metal gloss thermochromic molding is required. I do.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention is characterized in that a metallic luster pigment in which the surface of flaky aluminum oxide is coated with a metal oxide is applied, and a conventional metallic luster pigment in which the surface of natural mica is coated with titanium oxide is applied. Compared to the system, under the sunlight, it shines remarkably and shines, expresses a metallic luster luminous effect, and furthermore, the luminous effect is seen as a form with perspective and three-dimensional effect, coexisting reversible thermochromic material The color change effect due to the temperature change of the sculpture brings out a variety of appearances, and satisfies the uniqueness and decorativeness.
Supplementary explanation of the effect, the metallic luster pigment, because the individual pigments partially overlap or exist in a non-planar state, the glitter and color tone are slightly changed, and have a three-dimensional effect as a whole Visualize various aspects. Here, even if the individual pigments are present in the overlapping portion, they can be effectively developed without impairing the original metallic luster luster effect depending on the transparency of the pigments themselves.
[0007]
When flaky aluminum oxide is used as the core material of the metallic luster pigment, the content of impurities is smaller than that of conventional general-purpose natural mica, and the metallic luster is coated with a metal oxide represented by titanium oxide. Thus, depending on the covering ratio of the metal oxide, a metallic luster of gold, silver or metallic color is exhibited.
Therefore, the metallic luster pigment in which aluminum oxide is coated with a metal oxide has a high luster and excellent transparency, so that the color tone of the reversible thermochromic material can be clearly recognized.
Examples of the metal oxide covering the surface of the aluminum oxide include metal oxides such as titanium, zirconium, chromium, vanadium, and iron, and preferably include metal oxides containing titanium oxide as a main component.
The metallic luster pigment has an average thickness of 0.1 to 5 μm and an average particle size of 2 to 200 μm.
By using the metallic gloss pigment having the above-mentioned thickness and average particle diameter, it is possible to exhibit a distinct color change due to the glitter of the metallic gloss pigment and the discoloration of the reversible thermochromic material.
The average particle diameter indicates an average particle diameter by a laser diffraction method, and is a particle diameter whose volume-based median diameter corresponds to 50% of the cumulative distribution.
[0008]
Specifically, as a metallic luster pigment in which the surface of the flaky aluminum oxide is coated with a metal oxide, the product name is “Silalic” (trade name, manufactured by Merck Ltd.): T50-10 (10 to 30 μm: silver), T60-10WNT (10 3030 μm: silver), T60-20WNT (10-30 μm: gold), T60-21WNT (10-30 μm: metallic red), T60-23WNT (10-30 μm: metallic blue), T60-24WNT (10-30 μm: metallic green) ) Can be exemplified. The values in parentheses indicate the average particle size and color tone.
[0009]
As the reversible thermochromic material, a reversible thermochromic composition containing three components of an organic compound medium that reversibly causes a color reaction between an electron-donating color-forming organic compound and an electron-accepting compound is preferably used. . Specifically, those described in Japanese Patent Publication No. 51-44706, Japanese Patent Publication No. 51-44707, Japanese Patent Publication No. 1-29898, etc. proposed by the present applicant can be used.
The color changes before and after a predetermined temperature (discoloration point) as a boundary, shows a decolored state in a temperature range higher than the color change point, and a color development state in a temperature range lower than the color change point. Only one particular state can exist. That is, the other state is maintained while the heat or cold required for the state to develop is applied, but returns to the state exhibited in the normal temperature range when the application of the heat or cold is stopped, the hysteresis width. Is a heat-decoloring type reversible thermochromic material exhibiting relatively small thermochromic behavior.
In addition, it exhibits a large hysteresis characteristic described in Japanese Patent Publication No. 4-17154, Japanese Patent Application Laid-Open No. 7-179777, Japanese Patent Application Laid-Open No. 7-33997, Japanese Patent Application Laid-Open No. 8-39936, etc. proposed by the present applicant. That is, the shape of the curve plotting the change in the coloring density due to the temperature change is significantly different between the case where the temperature is increased from a lower temperature side than the discoloration temperature range and the case where the temperature is decreased from the higher temperature side than the discoloration temperature. The color changes along the route, the color development state in the temperature range below the low-temperature side color change point, or the decoloration state in the temperature range above the high-temperature side color change point, after removing the application of cold or heat required for the color change Even if there is, a color storage type reversible thermochromic material which can store and retain the data in a room temperature range between the two color changing points can be used.
Further, as described in Japanese Patent Application Laid-Open Nos. 11-129623 and 11-5973 proposed by the present applicant, specific examples of the electron-accepting compound having a straight-chain or side-chain alkyl group having 3 to 18 carbon atoms as the electron-accepting compound. A heat coloring type reversible thermochromic material to which the above-mentioned alkoxyphenol compound is applied can also be applied.
[0010]
The reversible thermochromic material described above can be applied as a composition comprising the essential three components, but in the form of a pigment, for example, fine granules obtained by blending the composition with a binder resin, the fine granules, A pigment in the form of a microcapsule in which the surface is coated with another resin, or the composition is encapsulated in microcapsules, is preferably used.
Among them, pigments in the form of microcapsules satisfy vivid and high-concentration color development, homogeneity, dispersion stability, chemical resistance, and the like, and are practically suitable. The microencapsulation is performed by a conventionally known interfacial polymerization method, in-situ polymerization method, in-liquid curing coating method, phase separation method from an aqueous solution, phase separation method from an organic solvent, melting dispersion cooling method, air suspension. It can be carried out by applying a coating method, a spray drying method or the like.
Depending on the purpose, a secondary resin film may be further provided on the surface of the pigment to impart durability, or the surface properties may be modified for practical use.
In the pigment in the form of microcapsules, the average particle diameter [(major axis + minor axis) / 2] is 0.1 to 100 μm, preferably 0.5 to 30 μm, and more preferably 0.5 to 20 μm. Is effective in terms of sharpness of discoloration, durability, workability and the like.
The reversible thermochromic material can be versatile by appropriately blending a non-thermochromic dye or pigment.
[0011]
As the molding resin, conventionally used general-purpose thermoplastic resins, thermosetting resins, and the like are appropriately applied according to the purpose.
As the thermoplastic resin, linear low-density polyethylene, low-density polyethylene, medium-density polyethylene, ultra-high-density polyethylene, chlorinated polyethylene, polypropylene, chlorinated polypropylene, polyisobutylene, polybutadiene, polymethylpentene, polystyrene, polyethylene terephthalate, Polybutylene terephthalate, polyvinyl acetate, vinyl chloride resin, chlorinated polyvinyl chloride, polyvinylidene chloride, acrylate resin, methacrylate resin, polyamide, copolymerized polyamide, polyamide imide, polyacetal, polyvinyl formal, polyvinyl butyral, poly Arylate, polyetherimide, polyetheretherketone, polycarbonate, polyphenylether, polyphenylenesulfide, polysal , Fluororesin, ionomer resin, ethylene-propylene copolymer resin, ethylene-vinyl acetate copolymer resin, ethylene-vinyl alcohol copolymer resin, ethylene-acrylate copolymer resin, ethylene-methacrylate copolymer resin, ethylene -Vinyl chloride copolymer resin, vinyl chloride-propylene copolymer resin, vinyl chloride-vinylidene chloride copolymer resin, styrene-butadiene copolymer resin, acrylonitrile-vinylidene chloride copolymer resin, acrylonitrile-styrene copolymer resin, acrylonitrile-ethylene- Styrene copolymer resin, acrylonitrile-butadiene-styrene copolymer resin, acrylonitrile-chlorinated polyethylene-styrene copolymer resin, acrylonitrile-acrylate-styrene copolymer resin, ethylene-acetic acid Nyl resin-vinyl chloride graft copolymer resin, methyl methacrylate-butadiene-styrene copolymer resin, styrene-based thermoplastic elastomer, olefin-based thermoplastic elastomer, urethane-based thermoplastic elastomer, polyester-based thermoplastic elastomer, 1,2-polybutadiene Thermoplastic elastomer, vinyl chloride thermoplastic elastomer, petroleum hydrocarbon resin, cellulose acetate, cellulose acetate propionate, cellulose acetate butyrate, nitrocellulose, low molecular weight polyethylene, low molecular weight polypropylene, polybutene, cumarone-indene copolymer Products, phenoxy plastics, and the like, in the form of pellets, powders, and the like, which are applied to injection molding, extrusion molding, blow molding, cast molding, and the like. In addition, as the casting molding, alkyl phenol resin, rosin modified phenol resin, alkyd resin, vinyl chloride-vinyl acetate resin, styrene butadiene resin, epoxy resin, acrylate resin, unsaturated polyester resin, resins such as cellulose derivatives, It can be applied in a state of being dissolved or dispersed in water or an organic solvent. In the case of a vinyl chloride resin or a vinyl chloride-vinyl acetate resin for a plastisol, it can be cast and formed into a paste state.
Examples of the thermosetting resin include epoxy resin, xylene resin, toluene resin, guanamine resin, epoxy acrylate, phenol resin, unsaturated polyester resin, furan resin, polyimide, poly (p-hydroxybenzoic acid), polyurethane, urea resin, and melamine. Resins and silicone resins can be used, and a molded article can be obtained by casting or the like.
[0012]
Here, based on 100 parts by weight of the molding resin, 0.1 to 39 parts by weight (preferably 1 to 10 parts by weight) of the metallic luster pigment, 0.5 to 39 parts by weight of the reversible thermochromic material (preferably, 1 to 10 parts by weight) and the metallic luster pigment / reversible thermochromic material = 0.05 / 1 to 40/1 (weight ratio), preferably 0.5 / 1 to 30 It is preferably in a weight ratio of / 1.
By satisfying the above-mentioned weight ratio, it is possible to effectively develop various aspect changes woven by glitter and color change, and to maintain shape retention as a molded article.
[0013]
The resin composition for forming a metallic glossy thermochromic molding obtained as described above is in the form of pellets, powders, or pastes, and can be arbitrarily prepared by means such as general-purpose injection molding, extrusion molding, blow molding, or casting. It is practically used as a molded article in the form of a three-dimensional modeled object, a film, a sheet, a plate, a filament, a rod, a pipe, and the like.
In addition, a top coat layer may be provided on the upper layer of the molded body to improve durability and water resistance.
Further, a light stabilizer layer may be appropriately provided between the uppermost layer or each layer of the above-mentioned molded article. Specifically, the light stabilizer layer is selected from an ultraviolet absorber, an antioxidant, an antioxidant, a singlet oxygen quencher, a superoxide anion quencher, an ozone decolorant, a visible light absorber, and an infrared absorber. This is a layer in which the light stabilizer is fixed in a dispersed state. When a light stabilizer layer is provided on the uppermost layer, the light resistance of the reversible thermochromic material can be imparted in addition to durability and water resistance, which is more preferable.
[0014]
【Example】
Next, specific examples will be described. Parts in the examples are parts by weight.
[0015]
Example 1
40 parts of a gold metallic luster pigment (trade name: Silaric T60-20WNT Sunbeam Gold, average particle size 10-30 μm, manufactured by Merck Ltd.) in which the surface of flaky aluminum oxide is coated with titanium oxide, microcapsules having an average particle size of 15 μm After uniformly mixing 20 parts of the reversible thermochromic material in the form, 2 parts of a benzotriazole-based ultraviolet absorber, and 1000 parts of high-density polyethylene having a Vicat softening point of 119 ° C., the cylinder temperature was set to 165 ° C. using an extruder. Molding was carried out at a temperature of 160 ° C., and molding pellets (metallic glossy thermochromic molding resin composition) were obtained by an ordinary method.
Using the pellets, a metallic luster thermochromic sphere having a thickness of about 2 mm and an outer diameter of 5 cm was blow-molded with a blow molding machine at a cylinder temperature of 175 ° C.
The sphere has a gold color when the reversible thermochromic material develops black at 15 ° C. or lower, reflects light having a wavelength of 550 to 600 nm, which is a part of incident light, and absorbs light having other wavelengths. When the reversible thermochromic material loses its color at 30 ° C. or more and reflects transmitted light, it reflects all the incident light, and the golden metallic gloss disappears and becomes colorless, and a room temperature of 25 ° C. Below, each aspect in the color-developed state or the decolored state is alternately stored and held, and is alternatively viewed.
In addition, the reversible thermochromic material has a phase of 3-part of 2-anilino-3-methyl-6-dibutylaminofluorane, 6 parts of 4,4 '-(2-methyl-propylidene) bisphenol, and 50 parts of neopentyl stearate. A reversible thermochromic composition comprising a solution was obtained by encapsulation of an epoxy resin / amine curing agent by an interfacial polymerization method, and had two discoloration points (low-temperature discoloration point: 15 ° C., high-temperature discoloration point: 30). ° C).
[0016]
Example 2
Instead of the gold metallic luster pigment of Example 1, a silver metallic luster pigment in which the surface of flaky aluminum oxide was coated with titanium oxide [manufactured by Merck Co., Ltd., trade name: Silalic T50-10 Crystal Silver, average particle diameter 10 to 10] 30 μm] to obtain molding pellets in the same manner as in Example 1.
Next, in the same manner as in Example 1, blow molding was performed to obtain a metallic glossy thermochromic sphere.
The sphere has a silver metallic luster color when the reversible thermochromic material develops a black color at 15 ° C. or less, reflects light that is a part of the visible light of incident light, and absorbs light of other wavelengths. When the reversible thermochromic material decolorizes at 30 ° C. or higher and reflects the transmitted light, it reflects all of the incident light, the silver metallic luster disappears and becomes colorless, and at room temperature of 25 ° C. Each aspect in the color-developed state or the decolored state is stored and held alternately, and is alternatively viewed.
[0017]
Example 3
40 parts of the golden metallic luster pigment of Example 1, 20 parts of the reversible thermochromic material, 1.5 parts of a fluorescent pink pigment, 2 parts of a benzotriazole-based ultraviolet absorber, and 1000 parts of polypropylene having a Vicat softening point of 100 ° C. were uniformly mixed. Thereafter, molding pellets were obtained by an ordinary method using an extruder.
Using the pellets, a metallic luster thermochromic body of a miniature car was molded by an injection molding machine.
When the reversible thermochromic material develops a color at 15 ° C. or less and reflects light having a wavelength of 550 to 600 nm, which is a part of incident light, and absorbs light of other wavelengths, the metallic metallic luster is formed. When the reversible thermochromic material loses color at 30 ° C. or higher, the golden metallic luster disappears, and the color becomes a fluorescent pink pigment. It is memorized and stored alternately, and is alternatively viewed.
[0018]
Example 4
40 parts of the golden metallic luster pigment and 20 parts of the reversible thermochromic material of Example 1, 0.2 parts of a blue pigment and 0.6 parts of a white pigment, 2 parts of a benzotriazole-based ultraviolet absorber, and a linear vicat softening point of 105 ° C. After uniformly mixing 1000 parts of low-density polyethylene, pellets of 2 to 3 mm were obtained by an ordinary method using an extruder.
Using the pellets, a sheet was formed by an extruder at a cylinder temperature of 180 ° C. to obtain a metal glossy thermochromic sheet having a thickness of about 1 mm.
When the reversible thermochromic material develops a color at 15 ° C. or less and reflects light having a wavelength of 550 to 600 nm, which is a part of the incident light, and absorbs light of other wavelengths, the sheet has a golden metallic luster color. When the reversible thermochromic material decolorizes at 30 ° C. or higher, the gold metallic luster disappears, and pastel blue, which is a mixed color of a blue pigment and a white pigment, is exhibited. Each aspect of the color state is stored alternately and is alternatively viewed.
[0019]
Example 5
30 parts of metallic blue metallic luster pigment (manufactured by Merck Ltd., trade name: Silaric T60-23WNT, Galaxy Blue, average particle diameter 10 to 30 μm) in which the surface of flaky aluminum oxide is coated with titanium oxide, of Example 1 After uniformly mixing 20 parts of a reversible thermochromic material, 10 parts of a fluorescent yellow pigment, 5 parts of a benzotriazole-based ultraviolet absorber, 700 parts of an epoxy resin, and 250 parts of an amine-based curing agent, a heart-shaped casting mold is prepared. The mixture was poured and cured at 70 ° C. for 1 hour to obtain a heart-shaped metallic luster thermochromic molded article.
In the heart-shaped molded product, the reversible thermochromic material develops a color at 15 ° C. or less, reflects 430 to 500 μm blue light that is a part of the visible light of incident light, and absorbs light of other wavelengths. Then, a metallic blue metallic luster color is obtained, and when the reversible thermochromic material is decolored at 30 ° C. or higher, the metallic blue metallic luster color disappears and becomes a fluorescent yellow pigment color. Alternatively, the aspects in the decolored state are stored and held alternately, and are alternatively viewed.
[0020]
Example 6
Metallic green metallic luster pigment (trade name: Silalic T60-24WNT, Stellar Green, average particle diameter 10 to 30 μm, manufactured by Merck Ltd.) in which the surface of flaky aluminum oxide is coated with titanium oxide, 30 parts, reversible in Example 1. After uniformly mixing 20 parts of the thermochromic material, 2 parts of a benzotriazole-based ultraviolet absorber, and 1000 parts of polypropylene having a Vicat softening point of 100 ° C., using an extruder, a cylinder temperature of 165 ° C. and a gate temperature of 160 ° C. Molding was carried out under the conditions, and a molding pellet was obtained by a conventional method.
Next, using the pellets, a metallic luster thermochromic body of a miniature car was molded in the same manner as in Example 3.
In the body, the reversible thermochromic material develops a color at 15 ° C. or lower, reflects reflected light having a wavelength of 500 to 540 nm, which is a part of incident light, and absorbs transmitted light having other wavelengths. The metallic luster color of the metallic green color with high brightness is visually observed, and at 32 ° C., the reversible thermochromic material is decolorized and reflects transmitted light, so that all wavelengths of incident light are reflected, and high brightness is obtained. The metallic luster color was not visible and the transparent body was visible.
[0021]
Example 7
Metallic red metallic luster pigment (trade name: Silaric T60-21WNT, Salaris Red, average particle size 10 to 30 μm, manufactured by Merck Ltd.) in which the surface of flaky aluminum oxide is coated with titanium oxide, and 60 parts of reversible thermal discoloration 30 parts of a functional material, 1000 parts of a styrene-butadiene copolymer resin (melt flow rate 7.3), 10.0 parts by weight of an ultraviolet absorber, and 0.5 parts by weight of a metal soap lubricant are mixed and uniformly dispersed by a tumbler mixer. After that, molding pellets were obtained using an extruder.
Using the above pellets, a metal luster thermochromic dolphin was obtained by injection molding using a dolphin mold.
At 20 ° C. or lower, a metallic luster color of glittering and high luminance is visually observed at a temperature of 20 ° C. or lower, and at 20 ° C. or higher, a metal luster color of a high luminance is not visually observed, but as a dolphin having transparency.
The reversible thermochromic material includes 6 parts of 6-diethylamino-benzo (a) -fluorane, 6 parts of 4,4 ′-(2-methyl-propylidene) bisphenol, 25 parts of myristyl alcohol, and 25 parts of cetyl caprate. This is a heat-decolorable reversible thermochromic material having an average particle diameter of 8 μm, obtained by encapsulating a reversible thermochromic composition comprising a part of a compatible material by an interfacial polymerization method of an epoxy resin / amine curing agent.
[0022]
Example 8
After uniformly mixing 20 parts of the gold metallic luster pigment of Example 1, 20 parts of the reversible thermochromic material, 2 parts of a benzotriazole-based ultraviolet absorber, and 1000 parts of polypropylene having a Vicat softening point of 100 ° C., using an extruder. Then, molding was performed under the conditions of a cylinder temperature of 165 ° C. and a gate temperature of 160 ° C., and molding pellets were obtained by a conventional method.
Using the pellets, an injection molding machine was used to obtain a 3 mm thick, 5 cm long, 5 cm wide star-shaped metallic glossy thermochromic molded article.
In the star-shaped molded product, a metallic luster color of a metallic yellow color with high brightness at 15 ° C. or less is visually observed, and at 32 ° C. or more, the reversible thermochromic material decolorizes and reflects transmitted light. It reflected all the wavelengths of light, and made the transparent body visible, with no bright metallic luster color visible.
The reversible thermochromic material is 1.5 parts of 2,6-bis (2'-ethoxyphenyl) -4- (4'-dimethylaminophenyl) -pyridine and 2,2'-bis (4'- (Hydroxyphenyl) hexafluoropropane 8 parts, neopentyl stearate 50 parts of a reversible thermochromic composition comprising a compatibilized solution of epoxy resin / amino curing agent was encapsulated by an interfacial polymerization method. It is a color type reversible thermochromic material.
[0023]
Example 9
20 parts of a metallic blue metallic luster pigment of Example 5, 20 parts of a reversible thermochromic material, 1.5 parts of a fluorescent pink pigment, 5 parts of a benzotriazole ultraviolet absorber, 5 parts of a polystyrene block and an elastomer block of a polyolefin structure. After uniformly mixing 1000 parts of a block copolymer elastomer (elongation at break: 1200%, styrene content: 13%), an extruder is used at a cylinder temperature of 200 ° C. and a gate temperature of 200 ° C. in a conventional manner. Thus, molding pellets were obtained.
Using the pellets, an injection molding machine was used to mold a metallic glossy thermochromic spider toy simulating a spider form at a cylinder temperature of 220 ° C.
In the spider toy, a metallic luster color of a metallic blue color with high brightness is seen below 30 ° C., and a metallic gloss color with high luminance is not seen above 30 ° C., and a clear fluorescent pink color is visually observed. Was done.
In addition, the said reversible thermochromic material is 3- (4-diethylamino-2-ethoxyphenyl) -3- (1-ethyl-2-methylindol-3-yl) -4-azaphthalide 1 part, 4, 4 '. A reversible thermochromic composition comprising a compatible solution of 6 parts of-(2-methyl-propylidene) bisphenol, 25 parts of cetyl alcohol and 25 parts of cetyl caprate is obtained by encapsulation of an epoxy resin / amine curing agent by an interfacial polymerization method. It is a heat-decolorable reversible thermochromic material having an average particle diameter of 8 μm.
[0024]
【The invention's effect】
By applying the resin composition of the present invention, the color change due to the temperature change and the brilliant effect of the metallic gloss exhibit a variety of appearances, and the appearance change is visually recognized as an appearance with transparency and three-dimensional effect. It can supply unique metallic luster thermochromic moldings, and can be applied to various fields such as toy elements, decoration elements, temperature indicating elements, and differentiation elements.

Claims (6)

薄片状酸化アルミニウムの表面を金属酸化物で被覆した金属光沢顔料と、電子供与性呈色性有機化合物、電子受容性化合物、及び前記両者の呈色反応を可逆的に生起させる有機化合物媒体を必須三成分として含む可逆熱変色性材料と、成形用樹脂とからなる金属光沢調熱変色性成形用樹脂組成物。A metal luster pigment in which the surface of flaky aluminum oxide is coated with a metal oxide, an electron-donating color-forming organic compound, an electron-accepting compound, and an organic compound medium that reversibly causes a color reaction between the two. A resin composition for forming a metallic glossy thermochromic composition, comprising a reversible thermochromic material containing three components and a molding resin. 前記金属光沢顔料は、薄片状酸化アルミニウムの表面を酸化チタンを主成分とする金属酸化物で被覆した顔料である請求項1記載の金属光沢調熱変色性成形用樹脂組成物。The resin composition for forming a metallic luster thermochromic composition according to claim 1, wherein the metallic luster pigment is a pigment in which the surface of flaky aluminum oxide is coated with a metal oxide containing titanium oxide as a main component. 前記薄片状酸化アルミニウムの表面を金属酸化物で被覆した金属光沢顔料は、平均の厚みが0.1〜5μmであり、平均粒子径が2〜200μmである請求項1又は2記載の金属光沢調熱変色性成形用樹脂組成物。The metallic glossy pigment according to claim 1, wherein the metallic lustrous pigment in which the surface of the flaky aluminum oxide is coated with a metal oxide has an average thickness of 0.1 to 5 μm and an average particle size of 2 to 200 μm. Thermochromic molding resin composition. 前記可逆熱変色性材料は、前記必須三成分を含む組成物をマイクロカプセルに内包させたマイクロカプセル形態の顔料である請求項1記載の金属光沢調熱変色性成形用樹脂組成物。The resin composition for forming a metallic glossy thermochromic molding according to claim 1, wherein the reversible thermochromic material is a pigment in the form of microcapsules in which the composition containing the essential three components is encapsulated in microcapsules. 成形用樹脂100重量部に対し、金属光沢顔料0.1〜39重量部、可逆熱変色性材料0.5〜39重量部の割合でブレンドされていると共に、前記金属光沢顔料/可逆熱変色性材料=0.05/1〜40/1(重量比)を満たす請求項1乃至4のいずれかに記載の金属光沢調熱変色性成形用樹脂組成物。0.1 to 39 parts by weight of a metallic luster pigment and 0.5 to 39 parts by weight of a reversible thermochromic material are blended with 100 parts by weight of a molding resin. The resin composition for molding a metallic glossy thermochromic composition according to any one of claims 1 to 4, wherein the material satisfies a condition of 0.05 / 1 to 40/1 (weight ratio). 請求項1乃至5のいずれかに記載された金属光沢調熱変色性成形用樹脂組成物を使用して射出成形、押出成形、ブロー成形、又は注型成形の何れかにより成形された金属光沢調熱変色性成形体。A metallic gloss tone formed by injection molding, extrusion molding, blow molding, or cast molding using the resin composition for forming a metallic gloss thermochromic composition according to any one of claims 1 to 5. Thermochromic moldings.
JP2002371203A 2002-12-24 2002-12-24 Metallic glossy tone, thermochromic molding resin composition and molded product using the same Pending JP2004203906A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11667069B2 (en) 2019-04-11 2023-06-06 The Procter & Gamble Company Blow molded article with visual effects
US11724847B2 (en) 2018-10-19 2023-08-15 The Procter & Gamble Company Blow molded article with debossing
US11814208B2 (en) 2018-07-17 2023-11-14 The Procter & Gamble Company Blow molded article with visual effects
US11975522B2 (en) 2020-01-08 2024-05-07 The Procter & Gamble Company Blow molded multilayer article with color gradient

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11814208B2 (en) 2018-07-17 2023-11-14 The Procter & Gamble Company Blow molded article with visual effects
US11724847B2 (en) 2018-10-19 2023-08-15 The Procter & Gamble Company Blow molded article with debossing
US11667069B2 (en) 2019-04-11 2023-06-06 The Procter & Gamble Company Blow molded article with visual effects
US11975522B2 (en) 2020-01-08 2024-05-07 The Procter & Gamble Company Blow molded multilayer article with color gradient

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