JP2019070858A - 反射防止フィルム - Google Patents
反射防止フィルム Download PDFInfo
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- JP2019070858A JP2019070858A JP2019017798A JP2019017798A JP2019070858A JP 2019070858 A JP2019070858 A JP 2019070858A JP 2019017798 A JP2019017798 A JP 2019017798A JP 2019017798 A JP2019017798 A JP 2019017798A JP 2019070858 A JP2019070858 A JP 2019070858A
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- inorganic nanoparticles
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Abstract
【解決手段】本発明は、X線照射による小角散乱で定義される散乱ベクトルに対する散乱強度のlog値のグラフにおいて、0.0758〜0.1256nm−1の散乱ベクトル(qmax)で1個以上のピークを示す、反射防止フィルムに関する。
【選択図】図1
Description
本出願は、2016年3月9日付の韓国特許出願第10−2016−0028468号、2016年3月11日付の韓国特許出願第10−2016−0029336号、2016年3月14日付の韓国特許出願第10−2016−0030395号、および2017年3月9日付の韓国特許出願第10−2017−0029959号に基づく優先権の利益を主張し、当該韓国特許出願の文献に開示されたすべての内容は本明細書の一部として含まれる。
q=4π sinθ/λ
製造例:ハードコートフィルムの製造
KYOEISHA社の塩タイプの帯電防止ハードコート液(固形分50重量%、製品名:LJD−1000)をトリアセチルセルロースフィルムに#10mayer barでコーティングし、90℃で1分間乾燥した後、150mJ/cm2の紫外線を照射して、約5〜6μmの厚さを有するハードコートフィルムを製造した。
実施例1〜4
(1)低屈折層製造用光硬化性コーティング組成物の製造
ペンタエリスリトールトリアクリレート(PETA)100重量部に対して、中空状シリカナノ粒子(直径:約50〜60nm、密度:1.96g/cm3、JSC catalyst and chemicals社製品)281重量部、ソリッド状シリカナノ粒子(直径:約12nm、密度:2.65g/cm3)63重量部、第1含フッ素化合物(X−71−1203M、ShinEtsu社)131重量部、第2含フッ素化合物(RS−537、DIC社)19重量部、開始剤(Irgacure127、Ciba社)31重量部を、MIBK(methyl isobutyl ketone)溶媒に固形分濃度3重量%となるように希釈した。
前記製造例のハードコートフィルム上に、前記得られた光硬化性コーティング組成物を#4mayer barで厚さが約110〜120nmとなるようにコーティングし、下記表1の温度および時間で乾燥および硬化した。前記硬化時には、窒素パージング下、前記乾燥したコーティング物に252mJ/cm2の紫外線を照射した。
(1)低屈折層製造用光硬化性コーティング組成物の製造
トリメチロールプロパントリアクリレート(TMPTA)100重量部に対して、中空状シリカナノ粒子(直径:約50〜60nm、密度:1.96g/cm3、JSC catalyst and chemicals社製品)268重量部、ソリッド状シリカナノ粒子(直径:約12nm、密度:2.65g/cm3)55重量部、第1含フッ素化合物(X−71−1203M、ShinEtsu社)144重量部、第2含フッ素化合物(RS−537、DIC社)21重量部、開始剤(Irgacure127、Ciba社)31重量部を、MIBK(methyl isobutyl ketone)溶媒に固形分濃度3重量%となるように希釈した。
前記製造例のハードコートフィルム上に、前記得られた光硬化性コーティング組成物を#4mayer barで厚さが約110〜120nmとなるようにコーティングし、下記表1の温度および時間で乾燥および硬化した。前記硬化時には、窒素パージング下、前記乾燥したコーティング物に252mJ/cm2の紫外線を照射した。
(1)ハードコート層(HD2)の製造
ペンタエリスリトールトリアクリレート30g、高分子量共重合体(BEAMSET371、Arakawa社、Epoxy Acrylate、分子量40,000)2.5g、メチルエチルケトン20g、およびレベリング剤(Tego wet270)0.5gを均一に混合した後に、屈折率が1.525の微粒子としてアクリル−スチレン共重合体(体積平均粒径:2μm、製造会社:Sekisui Plastic)2gを添加して、ハードコート組成物を製造した。
ペンタエリスリトールトリアクリレート(PETA)100重量部に対して、中空状シリカナノ粒子(直径:約50〜60nm、密度:1.96g/cm3、JGC catalyst and chemicals社製品)135重量部、ソリッド状シリカナノ粒子(直径:約12nm、密度:2.65g/cm3)88重量部、第1含フッ素化合物(X−71−1203M、ShinEtsu社)38重量部、第2含フッ素化合物(RS−537、DI社)11重量部、開始剤(Irgacure127、Ciba社)7重量部を、メチルイソブチルケトン(MIBK):ジアセトンアルコール(DAA):イソプロピルアルコールを3:3:4の重量比で混合した溶媒に固形分濃度3重量%となるように希釈して、低屈折層製造用光硬化性コーティング組成物を製造した。
比較例1
前記低屈折層製造用光硬化性コーティング組成物を塗布し、常温(25℃)で乾燥した点を除いて、実施例1と同様の方法で反射防止フィルムを製造した。
前記実施例1で用いたソリッド状シリカナノ粒子63重量部をペンタエリスリトールトリアクリレート(PETA)63重量部に代替した点を除いて、前記実施例1と同様の方法で低屈折層製造用光硬化性コーティング組成物を製造し、実施例1と同様の方法で反射防止フィルムを製造した。
前記低屈折層製造用光硬化性コーティング組成物を塗布し、140℃で乾燥した点を除いて、実施例5と同様の方法で反射防止フィルムを製造した。
前記実施例および比較例で得られた反射防止フィルムに対して、次の項目の実験を施した。
実施例および比較例で得られた反射防止フィルムが可視光線領域(380〜780nm)で示す平均反射率を、Solidspec3700(SHIMADZU)装備を用いて測定した。
実施例および比較例で得られた反射防止フィルムの表面に黒ネームペンで5cmの長さの直線を描き、無塵布を用いて擦った時の消される回数を確認して、防汚性を測定した。
O:消された時点が10回以下
△:消された時点が11回〜20回
X:消された時点が20回超過
前記スチールウールに荷重をかけて27rpmの速度で10回往復し、実施例および比較例で得られた反射防止フィルムの表面を擦った。肉眼で観察される1cm以下のスクラッチ1個以下が観察される最大荷重を測定した。
前記実施例で得られた低屈折層のうち、相分離された領域に対して380nm〜1,000nmの波長で測定された楕円偏光とCauchyモデルを用いて、550nmにおける屈折率を計算した。
実施例および比較例それぞれの反射防止フィルムから得られた1cm×1cm(横×縦)の試験片に対して、1.54Åの波長のX線を4mの距離から照射して、散乱ベクトルおよび散乱強度を測定することができる。
q=4π sinθ/λ
Claims (20)
- X線照射による小角散乱で定義される散乱ベクトルに対する散乱強度のlog値のグラフにおいて、0.0758〜0.1256nm−1の散乱ベクトル(qmax)で1個以上のピークを示す、反射防止フィルム。
- 前記X線照射による小角散乱は、1cm×1cm(横×縦)の大きさの反射防止フィルムに対して、0.63Å〜1.54Åの波長のX線を4mの距離から照射して測定する、請求項1に記載の反射防止フィルム。
- 前記散乱ベクトルは、下記一般式1で定義される、請求項1に記載の反射防止フィルム:
[一般式1]
q=4π sinθ/λ
前記一般式1において、qは、散乱ベクトルであり、θは、散乱角度の1/2値であり、λは、照射されたX線の波長である。 - 前記反射防止フィルムは、380nm〜780nmの可視光線波長帯領域で0.7%以下の平均反射率を示す、請求項1に記載の反射防止フィルム。
- 前記反射防止フィルムは、ハードコート層;およびバインダー樹脂と前記バインダー樹脂に分散した中空状無機ナノ粒子およびソリッド状無機ナノ粒子を含む低屈折層;を含む、請求項1に記載の反射防止フィルム。
- 前記ハードコート層および前記低屈折層の間の界面近くにソリッド状無機ナノ粒子が中空状無機ナノ粒子より多く分布する、請求項5に記載の反射防止フィルム。
- 前記ハードコート層および前記低屈折層の間の界面から前記低屈折層全体厚さの50%以内に前記ソリッド状無機ナノ粒子全体中の70体積%以上が存在する、請求項6に記載の反射防止フィルム。
- 前記中空状無機ナノ粒子全体中の30体積%以上が、前記ソリッド状無機ナノ粒子全体より、前記ハードコート層および前記低屈折層の間の界面から前記低屈折層の厚さ方向により遠い距離に存在する、請求項6に記載の反射防止フィルム。
- 前記ハードコート層と前記低屈折層との界面から前記低屈折層全体厚さの30%以内に前記ソリッド状無機ナノ粒子全体中の70体積%以上が存在する、請求項6に記載の反射防止フィルム。
- 前記ハードコート層と前記低屈折層との界面から前記低屈折層全体厚さの30%超過の領域に前記中空状無機ナノ粒子全体中の70体積%以上が存在する、請求項9に記載の反射防止フィルム。
- 前記低屈折層は、前記ソリッド状無機ナノ粒子全体中の70体積%以上が含まれている第1層と、前記中空状無機ナノ粒子全体中の70体積%以上が含まれている第2層とを含み、
前記第1層が、第2層に比べて、前記ハードコート層および前記低屈折層の間の界面により近く位置する、請求項6に記載の反射防止フィルム。 - 前記ソリッド状無機ナノ粒子全体中の70体積%以上が含まれている第1層は、前記ハードコート層および前記低屈折層の間の界面から前記低屈折層全体厚さの50%以内に位置する、請求項11に記載の反射防止フィルム。
- 前記ソリッド状無機ナノ粒子が、前記中空状無機ナノ粒子に比べて0.50g/cm3以上高い密度を有する、請求項5に記載の反射防止フィルム。
- 前記ソリッド状無機ナノ粒子および前記中空状無機ナノ粒子それぞれは、表面に(メタ)アクリレート基、エポキシド基、ビニル基(Vinyl)、およびチオール基(Thiol)からなる群より選択された1種以上の反応性官能基を含有する、請求項5に記載の反射防止フィルム。
- 前記低屈折層に含まれるバインダー樹脂は、光重合性化合物の(共)重合体および光反応性官能基を含む含フッ素化合物の間の架橋(共)重合体を含む、請求項5に記載の反射防止フィルム。
- 前記低屈折層は、前記光重合性化合物の(共)重合体100重量部対比、前記中空状無機ナノ粒子10〜400重量部および前記ソリッド状無機ナノ粒子10〜400重量部を含む、請求項5に記載の反射防止フィルム。
- 前記光反応性官能基を含む含フッ素化合物はそれぞれ、2,000〜200,000の重量平均分子量を有する、請求項15に記載の反射防止フィルム。
- 前記バインダー樹脂は、前記光重合性化合物の(共)重合体100重量部に対して、前記光反応性官能基を含む含フッ素化合物を20〜300重量部含む、請求項15に記載の反射防止フィルム。
- 前記ハードコート層は、光硬化性樹脂を含むバインダー樹脂および前記バインダー樹脂に分散した有機または無機微粒子;を含む、請求項5に記載の反射防止フィルム。
- 前記有機微粒子は、1〜10μmの粒径を有し、
前記無機微粒子は、1nm〜500nmの粒径を有する、請求項19に記載の反射防止フィルム。
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