[最佳模式] 在下文中，將更詳細地闡述本發明。 本發明之一個實施例係關於包含以下之硬塗組合物：具有0.01至1μm之平均粒徑之聚矽氧橡膠細粒子、具有(甲基)丙烯酸酯末端基團之樹枝狀聚合物化合物、具有環己基之多官能胺基甲酸酯(甲基)丙烯酸酯、具有乙二醇基團之多官能(甲基)丙烯酸酯、光起始劑及溶劑。 在本發明之一個實施例中，聚矽氧橡膠細粒子係用於保證硬塗膜之耐衝擊性、減少硬塗組合物之固化收縮且因此降低硬塗膜固化後之捲曲的組份，且可具有0.01至1μm之平均粒徑及介於0.01至5μm範圍內之粒徑分佈。 基於硬塗組合物之總重量之100重量%，聚矽氧橡膠細粒子之所包括量可為3至15重量%、較佳5至10重量%。在聚矽氧橡膠細粒子之量低於3重量%時，可能難以期望改良耐衝擊性之效應。在聚矽氧橡膠細粒子之量超過15重量%時，可能難以保證足夠硬度。 在本發明之一個實施例中，聚矽氧橡膠細粒子可由具有由以下化學式1表示之直鏈有機矽氧烷單元之聚矽氧橡膠組成。 [化學式1]其中， R係C1
-C30
烷基、C2
-C30
烯基、C3
-C10
環烷基、芳基或芳烷基，且 n係5至5,000之整數。 如本文所用術語「C1
-C30
烷基」係指具有1至30個碳原子之直鏈或具支鏈單價烴，且包括(例如)甲基、乙基、丙基、丁基、戊基、己基、庚基、辛基、癸基、十一烷基、十二烷基、十四烷基、十五烷基、十六烷基、十七烷基、十八烷基、十九烷基、二十烷基、二十一烷基、二十二烷基、二十三烷基、二十四烷基、三十烷基及諸如此類，但不限於此。 如本文所用術語「C2
-C30
烯基」係指具有2至30個碳原子且具有至少一個碳-碳雙鍵之直鏈或具支鏈不飽和烴，且包括(例如)乙烯基、烯丙基及諸如此類，但不限於此。 如本文所用術語「C3
-C10
環烷基」係指具有3至10個碳原子之單一或稠合環烴，且包括(例如)環戊基、環己基、環庚基及諸如此類，但不限於此。 如本文所用，芳基包括所有芳香族基團、雜芳香族基團及其部分還原衍生物。芳香族基團係5至15員單一或稠合環，且雜芳香族基團意指含有至少一個選自氧、硫及氮之原子之芳香族基團。芳基之典型實例包括苯基、甲苯基、萘基及諸如此類，但不限於此。 如本文所用術語「芳烷基」係指複合基團，其中芳基(芳香族烴基團)經烷基之碳原子取代，且包括(例如)，苄基、苯乙基及諸如此類，但不限於此。 C1
-C30
烷基、C2
-C30
烯基、C3
-C10
環烷基、芳基及芳烷基可為其中一或多個氫原子可由鹵素、胺基、丙烯醯基氧基、甲基丙烯醯基氧基、環氧基團、縮水甘油氧基、巰基、羧基及諸如此類取代之彼等。 在本發明之一個實施例中，聚矽氧橡膠細粒子可經聚有機倍半矽氧烷樹脂塗佈。經聚有機倍半矽氧烷樹脂塗佈之聚矽氧橡膠細粒子可藉由如下方法產生：向聚矽氧橡膠細粒子之水性分散液中添加鹼性物質或鹼性水溶液及有機三烷氧基矽烷及使其經受水解及縮合反應。 在本發明之一個實施例中，具有(甲基)丙烯酸酯末端基團之樹枝狀聚合物化合物可藉由用(甲基)丙烯酸酯基取代具支鏈結構之末端用於紫外固化，且具有其中心完全係脂肪族且由第三酯鍵組成之結構特徵。因此，具有(甲基)丙烯酸酯末端基團之樹枝狀聚合物化合物之結構特徵在於，如與一般多官能丙烯酸酯單體相比，其具有隨著代增加相對於分子量而增加之官能基。由於官能基分佈在末端，故核部分可促進改良其固化期間之彎曲性質。藉此，可獲得具有高硬度及改良捲曲性質及撓性之硬塗膜。 基於硬塗組合物之總重量之100重量%，樹枝狀聚合物化合物之所包含量係5至30重量%、較佳10至25重量%。在樹枝狀聚合物化合物之量低於5重量%時，難以展現彎曲性質，且在樹枝狀聚合物化合物之量超過30重量%時，可能難以賦予塗佈層硬度特徵，此乃因存在自立體阻礙效應產生之未反應之官能基。 在本發明之一個實施例中，具有(甲基)丙烯酸酯末端基團之樹枝狀聚合物化合物可由以下化學式2表示： [化學式2] [R1
]4-n
-C-[R2
-OR3
]n
其中， R1
係C1
-C6
烷基， R2
係C1
-C6
伸烷基， R3
係(甲基)丙烯醯基或，且至少一個R3
係， R4
係(甲基)丙烯醯基或，且至少一個R4
係， R5
係(甲基)丙烯醯基或， R6
係(甲基)丙烯醯基， n係2至4之整數，且 m、x及y係2或3之整數。 本說明書中所用之C1
-C6
烷基係指具有1至6個碳原子之直鏈或具支鏈單價烴，且其實例包括甲基、乙基、正丙基、異丙基、正丁基、異丁基、第三丁基、正戊基、正己基及諸如此類，但不限於其。 本說明書中所用之C1
-C6
伸烷基係指具有1至6個碳原子之直鏈或具支鏈二價烴，且其實例包括亞甲基、伸乙基、伸丙基、伸丁基及諸如此類，但不限於其。 在本發明之一個實施例中，具有(甲基)丙烯酸酯末端基團之樹枝狀聚合物化合物通常可具有由以下化學式3表示之結構： [化學式3]具有(甲基)丙烯酸酯末端基團之樹枝狀聚合物化合物有市售或可根據業內已知之方法來製備。舉例而言，末端經複數個(甲基)丙烯酸酯基團取代之高度具支鏈樹枝狀聚合物化合物可藉由如下方式獲得：特定多元醇之中心骨架與二羥甲基丙酸進行縮合反應以形成第一代樹枝狀聚合物結構，作為支鏈結構之二羥甲基丙酸重複縮合反應以生長至第二或更高代樹枝狀聚合物結構，及隨後末端之丙烯酸縮合反應。 在本發明之一個實施例中，具有環己基之多官能胺基甲酸酯(甲基)丙烯酸酯係用於改良欲塗佈之膜之機械性質、尤其硬度的組份，且基於硬塗組合物之總重量之100重量%，所包含量係10至30重量%、較佳15至25重量%。在多官能胺基甲酸酯(甲基)丙烯酸酯之量低於10重量%時，機械性質、尤其硬度可降低。在多官能胺基甲酸酯(甲基)丙烯酸酯超過30重量%時，收縮力變大，且因此，可產生膜之捲曲、斷裂、破裂等。 具有環己基之多官能胺基甲酸酯(甲基)丙烯酸酯可藉由具有環己基之二異氰酸酯與具有羥基之多官能(甲基)丙烯酸酯之縮合反應來產生。 具有環己基之二異氰酸酯之具體實例可包括二異氰酸1,4-環己基酯、異佛爾酮二異氰酸酯、4,4-二環己基甲烷二異氰酸酯及諸如此類，但不限於其。 具有羥基之多官能(甲基)丙烯酸酯之具體實例可包括三羥甲基丙烷二(甲基)丙烯酸酯、新戊四醇三(甲基)丙烯酸酯、二新戊四醇五(甲基)丙烯酸酯及諸如此類，但不限於其。 在本發明之一個實施例中，具有環己基之多官能胺基甲酸酯(甲基)丙烯酸酯可包括選自由以下化學式4至5表示之化合物組成之群中之至少一者。 [化學式4][化學式5]在本發明之一個實施例中，具有乙二醇基團之多官能(甲基)丙烯酸酯係用於賦予欲塗佈之膜撓性的組份，且基於硬塗組合物之總重量之100重量%，所包含量係5至30重量%、較佳10至25重量%。在多官能(甲基)丙烯酸酯之量低於5重量%時，撓性可能不足且因此可發生塗膜斷裂或破裂。在多官能(甲基)丙烯酸酯之量超過30重量%時，機械性質可劣化且因此可出現表面劃痕或鉛筆硬度可降低。 具有乙二醇基團之多官能(甲基)丙烯酸酯可藉由將環氧乙烷加成反應至多元醇以獲得具有乙二醇基團之多官能醇，且隨後使(甲基)丙烯酸與多官能醇進行縮合反應來製備。 多元醇可特定而言為甘油、三羥甲基丙烷、新戊四醇、二新戊四醇及諸如此類，但不限於其。 具有乙二醇基團之多官能(甲基)丙烯酸酯之具體實例包括三羥甲基丙烷(EO)3
三(甲基)丙烯酸酯、三羥甲基丙烷(EO)6
三(甲基)丙烯酸酯、三羥甲基丙烷(EO)9
三(甲基)丙烯酸酯、甘油(EO)3
三(甲基)丙烯酸酯、甘油(EO)6
三(甲基)丙烯酸酯、甘油(EO)9
三(甲基)丙烯酸酯、新戊四醇(EO)4
四(甲基)丙烯酸酯、新戊四醇(EO)8
四(甲基)丙烯酸酯、新戊四醇(EO)12
四(甲基)丙烯酸酯、二新戊四醇(EO)6
六(甲基)丙烯酸酯、二新戊四醇(EO)12
六(甲基)丙烯酸酯、二新戊四醇(EO)18
六(甲基)丙烯酸酯及諸如此類。 在本發明之一個實施例中，具有乙二醇基團之多官能(甲基)丙烯酸酯可包括選自由以下化學式6至7表示之化合物組成之群中之至少一者。 [化學式6][化學式7]在本發明之一個實施例中，光起始劑可無具體限制地使用，只要其係技術領域中常用之起始劑即可。可將光起始劑分類成I型光起始劑(其中自由基係因化學結構或分子結合能量之差異藉由分子分解而生成)及II型(奪氫反應類型)光起始劑(其中納入三級胺作為共起始劑)。I型光起始劑之具體實例可包括苯乙酮(例如4-苯氧基二氯苯乙酮、4-第三丁基二氯苯乙酮、4-第三丁基三氯苯乙酮、二乙氧基苯乙酮、2-羥基-2-甲基-1-苯基丙-1-酮、1-(4-異丙基苯基)-2-羥基-2-甲基丙-1-酮、1-(4-十二烷基苯基)-2-羥基-2-甲基丙-1-酮、4-(2-羥基乙氧基)-苯基(2-羥基-2-丙基)酮、1-羥基環己基苯基酮或諸如此類)、安息香類(例如安息香、安息香甲醚、安息香乙醚、苄基二甲基縮酮或諸如此類)、醯基膦氧化物及二茂鈦化合物。II型光起始劑之具體實例可包括二苯甲酮(例如二苯甲酮、苯甲醯基苯甲酸、苯甲醯基苯甲酸甲醚、4-苯基二苯甲酮、羥基二苯甲酮、4-苯甲醯基-4'-甲基二苯基硫化物、3,3'-甲基-4-甲氧基二苯甲酮或諸如此類)、及噻噸酮類(例如噻噸酮、2-氯噻噸酮、2-甲基噻噸酮、2,4-二甲基噻噸酮、異丙基噻噸酮或諸如此類)。該等光起始劑可單獨使用或以其兩種或更多種之組合使用。另外，I型光起始劑及II型光起始劑可一起使用。 基於硬塗組合物之總重量之100重量%，光起始劑之所包含量可為0.1至5重量%。若光起始劑之量小於0.1重量%，則固化可能進行不足，且因此，最終獲得之硬塗膜之機械性質及黏著力可能降低。若光起始劑之量高於5重量%，則固化收縮可產生裂縫或捲曲。 在本發明之一個實施例中，溶劑可無具體限制地使用，只要其係此技術領域中常用之溶劑即可。溶劑之具體實例可包括醇(甲醇、乙醇、異丙醇、丁醇、丙二醇甲氧基醇等)、酮(甲基乙基酮、甲基丁基酮、甲基異丁基酮、二乙基酮、二丙基酮等)、乙酸酯(乙酸甲酯、乙酸乙酯、乙酸丁酯、丙二醇乙酸甲氧基酯等)、賽珞蘇類(cellosolves) (甲基賽珞蘇、乙基賽珞蘇、丙基賽珞蘇等)、烴(正己烷、正庚烷、苯、甲苯、二甲苯等)及諸如此類。該等溶劑可單獨使用或以其兩種或更多種之組合使用。 基於硬塗組合物之總重量之100重量%，溶劑之所包含量可為5至90重量%、較佳20至70重量%。若溶劑之量小於5重量%，則黏度可增加以劣化可加工性。若溶劑之量高於90重量%，則難以調節塗膜之厚度，且發生乾燥不均勻，從而產生外觀缺陷。 根據本發明之一個實施例之硬塗組合物可進一步包含無機粒子以進一步改良機械性質。 無機粒子可具有1至100 nm、較佳5至50 nm之平均粒徑。該等無機粒子係在塗膜中均勻地形成且可改良機械性質，例如耐磨性、抗刮性及鉛筆硬度。若粒徑小於以上範圍，則組合物中發生聚集，且因此不可形成均勻塗膜且不可預計上述效應。另一方面，若粒徑超過以上範圍，則最終獲得之塗膜之光學性質不僅可劣化，機械性質亦可劣化。 該等無機粒子可為金屬氧化物，且可使用選自由以下組成之群中之一者：Al2
O3
、SiO2
、ZnO、ZrO2
、BaTiO3
、TiO2
、Ta2
O5
、Ti3
O5
、ITO、IZO、ATO、ZnO-Al、Nb2
O3
、SnO、MgO及其組合。較佳地，可使用Al2
O3
、SiO2
、ZrO2
及諸如此類。無機粒子可直接產生或有市售。在市售產物之情形下，可使用以10至80重量%之濃度分散於有機溶劑中之彼等。 基於硬塗組合物之總重量之100重量%，無機粒子之所包含量可為5至40重量%。在無機粒子之量小於5重量%時，塗膜之機械性質(例如耐磨性、抗刮性及鉛筆硬度)可不足，且在無機粒子之量超過40重量%時，妨礙可固化性，此引起機械性質劣化，且外觀可較差。 除上文提及之組份外，根據本發明之實施例之硬塗組合物可進一步包括業內常用之組份，例如整平劑、紫外穩定劑、熱穩定劑、抗氧化劑、紫外吸收劑、表面活性劑、潤滑劑、抗結垢劑及諸如此類。 可在組合物之塗佈期間使用整平劑以提供塗膜之光滑度及塗佈性質。作為整平劑，可選擇並使用市售矽型、氟型及丙烯酸聚合物型整平劑。舉例而言，可使用BYK-323、BYK-331、BYK-333、BYK-337、BYK-373、BYK-375、BYK-377、BYK-378 (BYK Chemie)、TEGO Glide 410、TEGO Glide 411、TEGO Glide 415、TEGO Glide 420、TEGO Glide 432、TEGO Glide 435、TEGO Glide 440、TEGO Glide 450、TEGO Glide 455、TEGO Rad 2100、TEGO Rad 2200N、TEGO Rad 2250、TEGO Rad 2300、TEGO Rad 2500 (Degussa)、FC-4430及FC-4432 (3M)或諸如此類。基於硬塗組合物之總重量之100重量%，整平劑之所包含量可為0.1至1重量%。 由於固化塗膜之表面因連續紫外射線暴露被分解而變色及粉碎，出於藉由阻斷或吸收紫外該等射線保護硬塗層之目的，可添加紫外穩定劑。根據作用機制，紫外穩定劑可分類成吸收劑、淬滅劑及受阻胺光穩定劑(HALS)。根據化學結構，亦可將其分類成柳酸苯基酯(吸收劑)、二苯甲酮(吸收劑)、苯并三唑(吸收劑)及鎳衍生物(淬滅劑)及自由基清除劑。紫外穩定劑並無具體限制，只要其不顯著改變塗膜之初始顏色即可。 熱穩定劑係可商業應用之產品，且作為主要熱穩定劑之多酚型、作為次要熱穩定劑之亞磷酸鹽型及內酯型可各自個別或以其組合使用。 紫外穩定劑及熱穩定劑可藉由適當調節其含量為不影響紫外可固化性之程度來使用。 本發明之一個實施例係關於使用上述硬塗組合物形成之硬塗膜。根據本發明之實施例之硬塗膜之特徵在於在透明基板之一個表面或兩個表面上形成含有上述硬塗組合物之固化產物之塗佈層。 可使用具有透明度之任何塑膠膜作為透明基板。舉例而言，透明基板可選自具有含有環烯烴之單體(例如降莰烯)及基於多環降莰烯之單體之單元的基於環烯烴之衍生物、纖維素(二乙醯基纖維素、三乙醯基纖維素、乙醯基纖維素丁酸酯、異丁基酯纖維素、丙醯基纖維素、丁醯基纖維素、乙醯基丙醯基纖維素)、乙烯-乙酸乙烯酯共聚物、聚酯、聚苯乙烯、聚醯胺、聚醚醯亞胺、聚丙烯基、聚醯亞胺、聚醚碸、聚碸、聚乙烯、聚丙烯、聚甲基戊烯、聚氯乙烯、聚二氯亞乙烯、聚乙烯醇、聚乙烯縮醛、聚醚酮、聚醚醚酮、聚甲基丙烯酸甲酯、聚對苯二甲酸乙二酯、聚對苯二甲酸丁二酯、聚萘二甲酸乙二酯、聚碳酸酯、聚胺基甲酸酯及環氧，且可使用未拉伸、單軸或雙軸拉伸之膜。 透明基板之厚度並無具體限制，但可為8至1000 μm、較佳20至150 μm。在透明基板之厚度小於8 μm時，膜強度降低且因此可加工性降低。在透明基板之厚度超過1000 μm時，透明度降低或硬塗膜之重量增加。 根據本發明之一個實施例之硬塗膜可藉由將本發明硬塗組合物塗佈至透明基板之一個表面或兩個表面上、之後固化以形成塗佈層來產生。 可藉由適宜地使用已知塗佈方法將根據本發明之一個實施例之硬塗組合物塗佈至透明基板上，例如狹縫塗佈器、氣刀、逆轉輥、噴霧塗佈、刮塗、澆鑄、凹版塗佈、微凹版塗佈、旋塗等。 在將硬塗組合物塗佈至透明基板上後，可藉由於30℃至150℃之溫度下將揮發性物質汽化10秒至1小時、更特定而言30秒至30分鐘、之後UV固化來實施乾燥過程。可藉由以約0.01至10 J/cm2
、特定而言0.1至2 J/cm2
輻照UV射線實施UV固化。 此時，欲形成之塗佈層之厚度特定而言可為2至30 μm、更特定而言3至20 μm。在塗佈層之厚度在上述範圍內時，可獲得優良硬度效應。 本發明之一個實施例係關於包含以下之硬塗膜：具有0.01至1μm之平均粒徑之聚矽氧橡膠細粒子及具有(甲基)丙烯酸酯末端基團之樹枝狀聚合物化合物，其中在將44 g鋼球自30 cm或更高高度自由落在硬塗膜表面上且隨後觀察硬塗膜時，該膜未斷裂；且其中在將硬塗膜於85℃及85%相對濕度下靜置24小時，將44 g鋼球自30 cm或更高高度自由落在硬塗膜表面上且隨後觀察硬塗膜時，該膜未斷裂。 在本發明之一個實施例中，具有0.01至1μm之平均粒徑之聚矽氧橡膠細粒子可與上述硬塗組合物中所用者相同。 在本發明之一個實施例中，具有(甲基)丙烯酸酯末端基團之樹枝狀聚合物化合物可與上述硬塗組合物中所用者相同。 由於根據本發明之一個實施例之硬塗膜包括具有0.01至1μm之平均粒徑之聚矽氧橡膠細粒子及具有(甲基)丙烯酸酯末端基團之樹枝狀聚合物化合物，故其在室溫及高溫-高濕度環境下可具有優良耐衝擊性。 本發明之一個實施例係關於具有上述硬塗膜之影像顯示裝置。舉例而言，本發明之硬塗膜可用作影像顯示裝置、尤其可撓式顯示器之窗。此外，本發明之硬塗膜可藉由附接至偏光板、觸控感測器或諸如此類來使用。 根據本發明之一個實施例之硬塗膜可以各種操作模式之液晶裝置(LCD)使用，包括反射、透射、半透射、扭曲向列型(TN)、超扭曲向列型(STN)、光學補償彎曲(OCB)、混合對準向列型(HAN)、垂直對準(VA)型及平面內切換型(IPS) LCD。根據本發明之一個實施例之硬塗膜亦可用於各種影像顯示裝置中，包括電漿顯示器、場發射顯示器、有機EL顯示器、無機EL顯示器、電子紙及諸如此類。 下文中，將參照實例、比較實例及實驗實例更詳細地闡述本發明。熟習此項技術者應明瞭，該等實例、比較實例及實驗實例僅出於闡釋性實例，且本發明之範疇並不限於此。實例 1 至 4 及比較實例 1 至 3 ： 硬塗組合物之製備
硬塗組合物係利用下表1中所示之組成製備(單位：wt%)。 [表1]
聚矽氧橡膠細粒子：X-52-7030 (Shin-Etsu) 化學式4之化合物(Shin-A T&C, SOU-1700B) 化學式7之化合物(DPEA-126, Nippon Kayaku) 樹枝狀聚合物：SP1106 (Miwon Specialty Chemicals) 無機粒子：二氧化矽粒子，粒徑為10-15 nm 光起始劑：1-羥基環己基苯基酮 溶劑：甲基乙基酮實驗實例 1 ：
將實例及比較實例中製備之硬塗組合物以45 μm之厚度塗佈於聚醯亞胺膜(100 μm)之表面上，於110℃爐下乾燥5分鐘，且隨後藉由在金屬鹵化物燈中將其暴露於1.5 J之光固化以製備硬塗膜。 根據下述方法量測所製備之硬塗膜之物理性質，且其結果示於下表2中。(1) 鉛筆硬度
藉由施加1 kg之負荷使用鉛筆硬度測試器(PHT, Korea Sukbo Science)量測鉛筆硬度。使用由Mitsubishi Corporation製造之鉛筆且對於每一鉛筆硬度實施五次量測。(2) 室溫下之耐衝擊性
於室溫下針對每一高度將44 g鋼球自由落在硬塗膜表面上且隨後確認觀察到硬塗膜之破裂現象之最小高度。 ＜評估準則＞ ◎：在50 cm或更高高度發生斷裂 ◯：在30 cm或更大且小於50 cm之高度發生斷裂 △：在10 cm或更大且小於30 cm之高度發生斷裂 ×：在小於10 cm之高度發生斷裂(3) 於高溫及高濕度下之耐衝擊性
在將硬塗膜於85℃及85%相對濕度下靜置24小時，針對每一高度將44 g鋼球自由落在硬塗膜表面上且隨後確認觀察到硬塗膜之破裂現象之最小高度。 ＜評估準則＞ ◎：在50 cm或更高高度發生斷裂 ◯：在30 cm或更大且小於50 cm之高度發生斷裂 △：在10 cm或更大且小於30 cm之高度發生斷裂 ×：在小於10 cm之高度發生斷裂(4) 黏著
在膜之經塗佈表面上以1 mm之間隔水平及垂直畫出11條直線以100個規則正方形，且隨後使用膠帶(CT-24, Nichiban Co., Ltd., Japan)實施三次剝離測試。測試100個正方形中之三個且記錄平均值。 如下記錄黏著。 黏著= n / 100 n：所有正方形中未剝離之正方形之數目 100：正方形總數目 因此，在其皆不剝離時，將其記錄為100/100。(5) 捲曲
在將切成A4大小(29.7 × 21.0 cm)之正方形形狀之膜試樣放置於平坦玻璃板上且引導膜之經塗佈表面向上後，於25℃及50%RH下量測遠離四角形玻璃板之距離，且使用平均值作為量測值。(6) 芯棒
為評估破裂性質，將切成1 cm × 10 cm大小之經塗佈膜試樣放置於各自具有直徑(2 ɸ - 20 ɸ)之鐵棒上，引導經塗佈層向上且用手摺疊，且指示表面上不出現裂縫之最小直徑。 [表2]
如自表2可見，使用本發明之實例1至4之硬塗組合物製備之硬塗膜的硬度、耐衝擊性、黏著、捲曲性質及破裂抗性優良。另一方面，確認在使用比較實例1至3之硬塗組合物製備之硬塗膜的情形下，硬度、耐衝擊性、黏著、捲曲性質或破裂性質降低。具體而言，發現使用比較實例1至3之硬塗組合物製備之硬塗膜的耐衝擊性及硬度中之至少一者較差。 儘管已詳細顯示並闡述了本發明之特定實施例，但熟習此項技術者應明瞭，該等特定技術僅係較佳實施例且本發明之範疇並不限於此。熟習此項技術者將瞭解，可在不背離本發明之精神及範疇之情況下對本發明做出各種改變及修改。 因此，本發明之實質範疇欲藉由隨附申請專利範圍及其等效內容來界定。[Best Mode] Hereinafter, the present invention will be explained in more detail. An embodiment of the present invention relates to a hard coating composition comprising: fine silicone rubber particles having an average particle diameter of 0.01 to 1 μm; dendritic polymer compounds having a (meth) acrylate terminal group; Polyfunctional urethane (meth) acrylate of cyclohexyl, polyfunctional (meth) acrylate having ethylene glycol group, photoinitiator and solvent. In one embodiment of the present invention, the fine silicone rubber particles are used to ensure the impact resistance of the hard coating film, reduce the curing shrinkage of the hard coating composition, and thus reduce the curl of the hard coating film after curing, and It may have an average particle diameter of 0.01 to 1 μm and a particle size distribution in the range of 0.01 to 5 μm. Based on 100% by weight of the total weight of the hard coating composition, the silicone rubber fine particles may be included in an amount of 3 to 15% by weight, preferably 5 to 10% by weight. When the amount of the fine silicone rubber particles is less than 3% by weight, it may be difficult to expect an effect of improving impact resistance. When the amount of the fine silicone rubber particles exceeds 15% by weight, it may be difficult to ensure sufficient hardness. In one embodiment of the present invention, the silicone fine particles may be composed of a silicone rubber having a linear organosiloxane unit represented by the following Chemical Formula 1. [Chemical Formula 1] Among them, R is C 1 -C 30 alkyl, C 2 -C 30 alkenyl, C 3 -C 10 cycloalkyl, aryl or aralkyl, and n is an integer of 5 to 5,000. As used herein the term "C 1 -C 30 alkyl" refers to a straight-chain with 1 to 30 carbon atoms or a branched monovalent hydrocarbon, and include (for example) methyl, ethyl, propyl, butyl, pentyl Base, hexyl, heptyl, octyl, decyl, undecyl, dodecyl, tetradecyl, pentadecyl, hexadecyl, heptyl, octadecyl, nineteen Alkyl, eicosyl, behenyl, behenyl, behenyl, behenyl, behenyl, icosyl, and the like, but are not limited thereto. The term "C 2 -C 30 alkenyl" as used herein refers to a straight or branched chain unsaturated hydrocarbon having 2 to 30 carbon atoms and having at least one carbon-carbon double bond, and includes, for example, vinyl, Allyl and the like, but are not limited thereto. The term "C 3 -C 10 cycloalkyl" as used herein refers to a single or fused cyclic hydrocarbon having 3 to 10 carbon atoms, and includes, for example, cyclopentyl, cyclohexyl, cycloheptyl, and the like, but Not limited to this. As used herein, aryl includes all aromatic groups, heteroaromatic groups, and partially reduced derivatives thereof. The aromatic group is a single or fused ring of 5 to 15 members, and the heteroaromatic group means an aromatic group containing at least one atom selected from oxygen, sulfur, and nitrogen. Typical examples of aryl include, but are not limited to, phenyl, tolyl, naphthyl, and the like. The term "aralkyl" as used herein refers to a composite group in which an aryl (aromatic hydrocarbon group) is substituted with a carbon atom of an alkyl group and includes, for example, benzyl, phenethyl, and the like, but is not limited to this. C 1 -C 30 alkyl, C 2 -C 30 alkenyl, C 3 -C 10 cycloalkyl, aryl, and aralkyl can be one or more of hydrogen atoms can be halogen, amine, propenyloxy Substituents, methacrylfluorenyloxy, epoxy, glycidyloxy, mercapto, carboxyl and the like. In one embodiment of the present invention, the fine silicone rubber particles may be coated with a polyorganosilsesquioxane resin. The polyorganosilsesquioxane-coated polysiloxane rubber fine particles can be produced by the following method: adding an alkaline substance or an alkaline aqueous solution and an organic trialkoxylate to the aqueous dispersion of the polysiloxane rubber fine particles Silane and subject it to hydrolysis and condensation reactions. In one embodiment of the present invention, a dendrimer compound having a (meth) acrylate terminal group may be used for ultraviolet curing by replacing the terminal having a branched structure with a (meth) acrylate group, and having Its center is completely aliphatic and consists of a third ester bond. Therefore, the structure of a dendritic polymer compound having a (meth) acrylate terminal group is characterized in that it has a functional group that increases with generation with respect to molecular weight, as compared with a general polyfunctional acrylate monomer. Since the functional groups are distributed at the ends, the core portion can promote the improvement of the bending properties during its curing. Thereby, a hard coating film having high hardness and improved curling properties and flexibility can be obtained. The dendritic polymer compound is included in an amount of 5 to 30% by weight, preferably 10 to 25% by weight, based on 100% by weight of the total weight of the hard coating composition. When the amount of the dendritic polymer compound is less than 5% by weight, it is difficult to exhibit bending properties, and when the amount of the dendritic polymer compound is more than 30% by weight, it may be difficult to impart hardness characteristics to the coating layer because of the presence of autostere Unreacted functional group produced by hindering effect. In one embodiment of the present invention, a dendrimer compound having a (meth) acrylate terminal group may be represented by the following Chemical Formula 2: [Chemical Formula 2] [R 1 ] 4-n -C- [R 2 -OR 3 ] n wherein R 1 is C 1 -C 6 alkyl, R 2 is C 1 -C 6 alkylene, R 3 is (meth) acrylfluorenyl or And at least one R 3 series , R 4 series (meth) acrylfluorenyl or And at least one R 4 series , R 5 series (meth) acrylfluorenyl or R 6 is a (meth) acrylfluorenyl group, n is an integer of 2 to 4, and m, x, and y are integers of 2 or 3. The C 1 -C 6 alkyl group used in this specification refers to a linear or branched monovalent hydrocarbon having 1 to 6 carbon atoms, and examples thereof include methyl, ethyl, n-propyl, isopropyl, n- Butyl, isobutyl, third butyl, n-pentyl, n-hexyl and the like, but are not limited thereto. The C 1 -C 6 alkylene group used in this specification refers to a straight-chain or branched divalent hydrocarbon having 1 to 6 carbon atoms, and examples thereof include methylene, ethylidene, propylidene, and ethylene. Butyl and the like, but are not limited to it. In one embodiment of the present invention, a dendrimer compound having a (meth) acrylate terminal group may generally have a structure represented by the following Chemical Formula 3: [Chemical Formula 3] Dendrimer compounds having (meth) acrylate end groups are commercially available or can be prepared according to methods known in the art. For example, a highly branched dendrimer compound substituted with a plurality of (meth) acrylate groups at the end can be obtained by a condensation reaction between a central skeleton of a specific polyol and dimethylolpropionic acid In order to form a first-generation dendrimer structure, the dimethylolpropionic acid as a branched structure is repeatedly subjected to a condensation reaction to grow to a second-generation or higher-generation dendrimer structure, and then a terminal acrylic acid condensation reaction is performed. In one embodiment of the present invention, the polyfunctional urethane (meth) acrylate with cyclohexyl is a component for improving the mechanical properties, especially the hardness of the film to be coated, and is based on the hard coating combination 100% by weight of the total weight of the substance, and the contained amount is 10 to 30% by weight, preferably 15 to 25% by weight. When the amount of the polyfunctional urethane (meth) acrylate is less than 10% by weight, mechanical properties, especially hardness, may be reduced. When the polyfunctional urethane (meth) acrylate exceeds 30% by weight, the shrinkage force becomes large, and therefore, curling, breaking, cracking, and the like of the film may occur. A polyfunctional urethane (meth) acrylate having a cyclohexyl group can be produced by a condensation reaction of a diisocyanate having a cyclohexyl group and a polyfunctional (meth) acrylate having a hydroxyl group. Specific examples of the diisocyanate having cyclohexyl group may include 1,4-cyclohexyl diisocyanate, isophorone diisocyanate, 4,4-dicyclohexylmethane diisocyanate, and the like, but are not limited thereto. Specific examples of the polyfunctional (meth) acrylate having a hydroxyl group may include trimethylolpropane di (meth) acrylate, neopentaerythritol tri (meth) acrylate, dinepentaerythritol penta (methyl) ) Acrylates and the like, but not limited to them. In one embodiment of the present invention, the polyfunctional urethane (meth) acrylate having a cyclohexyl group may include at least one selected from the group consisting of compounds represented by the following Chemical Formulae 4 to 5. [Chemical Formula 4] [Chemical Formula 5] In one embodiment of the present invention, the polyfunctional (meth) acrylate having a glycol group is a component for imparting flexibility to a film to be coated, and is based on 100% of the total weight of the hard coating composition. % By weight, the amount included is 5 to 30% by weight, preferably 10 to 25% by weight. When the amount of the polyfunctional (meth) acrylate is less than 5% by weight, flexibility may be insufficient and thus coating film cracking or cracking may occur. When the amount of the polyfunctional (meth) acrylate exceeds 30% by weight, mechanical properties may be deteriorated and thus surface scratches may occur or pencil hardness may be reduced. A polyfunctional (meth) acrylate having an ethylene glycol group can be obtained by addition reaction of ethylene oxide to a polyol to obtain a polyfunctional alcohol having an ethylene glycol group, and then (meth) acrylic acid It is prepared by a condensation reaction with a polyfunctional alcohol. The polyhydric alcohol may specifically be, but is not limited to, glycerin, trimethylolpropane, neopentaerythritol, dipentaerythritol, and the like. Specific examples of the polyfunctional (meth) acrylate having an ethylene glycol group include trimethylolpropane (EO) 3 tri (meth) acrylate, trimethylolpropane (EO) 6 tri (meth) Acrylate, Trimethylolpropane (EO) 9 Tris (meth) acrylate, Glycerin (EO) 3 Tris (meth) acrylate, Glycerin (EO) 6 Tris (meth) acrylate, Glycerin (EO) 9 Tris (meth) acrylate, neopentaerythritol (EO) 4 tetras (meth) acrylate, neopentaerythritol (EO) 8 tetras (meth) acrylate, neopentaerythritol (EO) 12 tetra (Meth) acrylate, dipentaerythritol (EO) 6 hexa (meth) acrylate, dipentaerythritol (EO) 12 hexa (meth) acrylate, dipentaerythritol (EO) 18 Hexa (meth) acrylate and the like. In one embodiment of the present invention, the polyfunctional (meth) acrylate having an ethylene glycol group may include at least one selected from the group consisting of compounds represented by the following Chemical Formulae 6 to 7. [Chemical Formula 6] [Chemical Formula 7] In one embodiment of the present invention, the photo-initiator can be used without particular limitation as long as it is a commonly used initiator in the technical field. Photoinitiators can be classified into type I photoinitiators (where radicals are generated by molecular decomposition due to differences in chemical structure or molecular binding energy) and type II (hydrogen abstraction reaction type) photoinitiators (where Tertiary amines are included as co-initiators). Specific examples of the type I photoinitiator may include acetophenone (e.g., 4-phenoxydichloroacetophenone, 4-tert-butyldichloroacetophenone, 4-tert-butyltrichloroacetophenone , Diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropan- 1-ketone, 1- (4-dodecylphenyl) -2-hydroxy-2-methylpropan-1-one, 4- (2-hydroxyethoxy) -phenyl (2-hydroxy-2 -Propyl) ketone, 1-hydroxycyclohexylphenyl ketone or the like), benzoin (e.g. benzoin, benzoin methyl ether, benzoin ether, benzyl dimethyl ketal or the like), fluorenylphosphine oxide and dicene Titanium compounds. Specific examples of the type II photoinitiator may include benzophenone (e.g., benzophenone, benzophenobenzoic acid, benzophenobenzoic acid methyl ether, 4-phenylbenzophenone, hydroxydiphenyl Methanone, 4-benzylidene-4'-methyldiphenyl sulfide, 3,3'-methyl-4-methoxybenzophenone or the like, and thioxanthone (e.g. thiophene Xanthones, 2-chlorothioxanthone, 2-methylthioxanthone, 2,4-dimethylthioxanthone, isopropylthioxanthone or the like). These photo-initiators may be used alone or in a combination of two or more kinds thereof. In addition, a type I photoinitiator and a type II photoinitiator may be used together. The light initiator may be included in an amount of 0.1 to 5% by weight based on 100% by weight of the total weight of the hard coating composition. If the amount of the photo-initiator is less than 0.1% by weight, curing may not proceed sufficiently, and therefore, the mechanical properties and adhesion of the finally obtained hard coating film may be reduced. If the amount of the photo-initiator is higher than 5 wt%, cracks or curls may be caused by curing shrinkage. In one embodiment of the present invention, the solvent may be used without particular limitation as long as it is a solvent commonly used in this technical field. Specific examples of the solvent may include alcohols (methanol, ethanol, isopropanol, butanol, propylene glycol methoxy alcohol, etc.), ketones (methyl ethyl ketone, methyl butyl ketone, methyl isobutyl ketone, diethyl ketone). Ketones, dipropyl ketones, etc.), acetates (methyl acetate, ethyl acetate, butyl acetate, propylene glycol methoxyacetate, etc.), cellosolves (methylcythrene, ethyl Kisaibine, propylsaibate, etc.), hydrocarbons (n-hexane, n-heptane, benzene, toluene, xylene, etc.) and the like. These solvents may be used singly or in combination of two or more kinds thereof. The solvent may be included in an amount of 5 to 90% by weight, preferably 20 to 70% by weight, based on 100% by weight of the total weight of the hard coating composition. If the amount of the solvent is less than 5% by weight, the viscosity may be increased to deteriorate processability. If the amount of the solvent is more than 90% by weight, it is difficult to adjust the thickness of the coating film, and uneven drying occurs, thereby causing appearance defects. The hard coating composition according to an embodiment of the present invention may further include inorganic particles to further improve mechanical properties. The inorganic particles may have an average particle diameter of 1 to 100 nm, preferably 5 to 50 nm. These inorganic particles are uniformly formed in the coating film and can improve mechanical properties such as abrasion resistance, scratch resistance, and pencil hardness. If the particle diameter is smaller than the above range, aggregation occurs in the composition, and therefore, a uniform coating film cannot be formed and the above-mentioned effects cannot be expected. On the other hand, if the particle diameter exceeds the above range, not only the optical properties of the coating film finally obtained may be deteriorated, but also the mechanical properties may be deteriorated. The inorganic particles may be metal oxides, and one selected from the group consisting of Al 2 O 3 , SiO 2 , ZnO, ZrO 2 , BaTiO 3 , TiO 2 , Ta 2 O 5 , Ti 3 may be used. O 5 , ITO, IZO, ATO, ZnO-Al, Nb 2 O 3 , SnO, MgO, and combinations thereof. Preferably, Al 2 O 3 , SiO 2 , ZrO 2 and the like can be used. Inorganic particles can be directly generated or commercially available. In the case of a commercially available product, those dispersed in an organic solvent at a concentration of 10 to 80% by weight may be used. The contained amount of the inorganic particles may be 5 to 40% by weight based on 100% by weight of the total weight of the hard coating composition. When the amount of the inorganic particles is less than 5% by weight, the mechanical properties of the coating film (such as abrasion resistance, scratch resistance, and pencil hardness) may be insufficient, and when the amount of the inorganic particles exceeds 40% by weight, curability is hindered. Causes deterioration of mechanical properties, and the appearance may be poor. In addition to the components mentioned above, the hard coating composition according to the embodiment of the present invention may further include components commonly used in the industry, such as leveling agents, ultraviolet stabilizers, heat stabilizers, antioxidants, ultraviolet absorbers, Surfactants, lubricants, antiscalants and the like. A leveling agent may be used during the coating of the composition to provide smoothness and coating properties of the coating film. As the leveling agent, commercially available silicon type, fluorine type and acrylic polymer type leveling agents can be selected and used. For example, BYK-323, BYK-331, BYK-333, BYK-337, BYK-373, BYK-375, BYK-377, BYK-378 (BYK Chemie), TEGO Glide 410, TEGO Glide 411, TEGO Glide 415, TEGO Glide 420, TEGO Glide 432, TEGO Glide 435, TEGO Glide 440, TEGO Glide 450, TEGO Glide 455, TEGO Rad 2100, TEGO Rad 2200N, TEGO Rad 2250, TEGO Rad 2300, TEGO Rad 2500 (Degussa) , FC-4430, FC-4432 (3M), or the like. The leveling agent may be included in an amount of 0.1 to 1% by weight based on 100% by weight of the total weight of the hard coating composition. Since the surface of the cured coating film is discolored and shattered due to continuous UV-ray exposure, UV-stabilizers can be added for the purpose of protecting the hard coating by blocking or absorbing UV-rays. According to the mechanism of action, UV stabilizers can be classified into absorbers, quenchers and hindered amine light stabilizers (HALS). According to the chemical structure, it can also be classified into phenyl salicylate (absorbent), benzophenone (absorbent), benzotriazole (absorbent), nickel derivatives (quenching agent) and free radical scavenging. Agent. The ultraviolet stabilizer is not particularly limited as long as it does not significantly change the initial color of the coating film. The heat stabilizer is a commercially available product, and the polyphenol type as the main heat stabilizer, the phosphite type and the lactone type as the secondary heat stabilizer can be used individually or in combination. The ultraviolet stabilizer and the thermal stabilizer can be used by appropriately adjusting their content to such an extent that the ultraviolet curability is not affected. An embodiment of the present invention relates to a hard coat film formed using the hard coat composition described above. The hard coating film according to the embodiment of the present invention is characterized in that a coating layer containing a cured product of the hard coating composition described above is formed on one surface or both surfaces of a transparent substrate. Any transparent plastic film can be used as the transparent substrate. For example, the transparent substrate may be selected from a cycloolefin-based derivative having a cyclic olefin-containing monomer (such as norbornene) and a polycyclic norbornene-based monomer unit Cellulose, triethyl cellulose, ethyl cellulose butyrate, isobutyl cellulose, propyl cellulose, butyl cellulose, ethoxypropyl cellulose), ethylene vinyl acetate Copolymers, polyesters, polystyrene, polyimide, polyetherimide, polypropylene, polyimide, polyetherimide, polyimide, polyethylene, polypropylene, polymethylpentene, polychloride Ethylene, polyvinylidene chloride, polyvinyl alcohol, polyvinyl acetal, polyether ketone, polyether ether ketone, polymethyl methacrylate, polyethylene terephthalate, polybutylene terephthalate , Polyethylene naphthalate, polycarbonate, polyurethane and epoxy, and unstretched, uniaxially or biaxially stretched films can be used. The thickness of the transparent substrate is not particularly limited, but may be 8 to 1000 μm, preferably 20 to 150 μm. When the thickness of the transparent substrate is less than 8 μm, the film strength is reduced and thus the workability is reduced. When the thickness of the transparent substrate exceeds 1000 μm, the transparency decreases or the weight of the hard coating film increases. A hard coating film according to an embodiment of the present invention may be produced by applying the hard coating composition of the present invention to one surface or both surfaces of a transparent substrate and then curing to form a coating layer. The hard coating composition according to an embodiment of the present invention may be applied to a transparent substrate by suitably using a known coating method, such as a slit coater, an air knife, a reverse roll, spray coating, and blade coating. , Casting, gravure coating, micro gravure coating, spin coating, etc. After the hard coating composition is coated on the transparent substrate, the volatile substance can be vaporized at a temperature of 30 ° C to 150 ° C for 10 seconds to 1 hour, more specifically, 30 seconds to 30 minutes, and then UV cured. Implement the drying process. UV curing can be performed by irradiating UV rays at about 0.01 to 10 J / cm 2 , specifically 0.1 to 2 J / cm 2 . At this time, the thickness of the coating layer to be formed may be specifically 2 to 30 μm, and more specifically 3 to 20 μm. When the thickness of the coating layer is within the above range, an excellent hardness effect can be obtained. An embodiment of the present invention relates to a hard coating film comprising: fine silicone rubber particles having an average particle diameter of 0.01 to 1 μm; and a dendritic polymer compound having a (meth) acrylate terminal group, wherein When a 44 g steel ball was dropped freely on the surface of the hard coating film from a height of 30 cm or more and the hard coating film was subsequently observed, the film was not broken; After being left for 24 hours, a 44 g steel ball was freely dropped on the surface of the hard coating film from a height of 30 cm or more, and when the hard coating film was subsequently observed, the film was not broken. In one embodiment of the present invention, the fine silicone rubber particles having an average particle diameter of 0.01 to 1 μm may be the same as those used in the above-mentioned hard coating composition. In one embodiment of the present invention, the dendritic polymer compound having a (meth) acrylate terminal group may be the same as that used in the above-mentioned hard coating composition. Since the hard coating film according to one embodiment of the present invention includes fine silicone rubber particles having an average particle diameter of 0.01 to 1 μm and a dendrimer compound having a (meth) acrylate terminal group, the hard coating film is present in the chamber. It can have excellent impact resistance under the environment of high temperature and high humidity. An embodiment of the present invention relates to an image display device having the hard coating film described above. For example, the hard coating film of the present invention can be used as a window for an image display device, particularly a flexible display. In addition, the hard coating film of the present invention can be used by being attached to a polarizing plate, a touch sensor, or the like. The hard coating film according to an embodiment of the present invention can be used in a liquid crystal device (LCD) in various operation modes, including reflection, transmission, semi-transmission, twisted nematic (TN), super twisted nematic (STN), and optical compensation. Curved (OCB), hybrid alignment nematic (HAN), vertical alignment (VA) and in-plane switching (IPS) LCDs. The hard coating film according to an embodiment of the present invention can also be used in various image display devices, including plasma displays, field emission displays, organic EL displays, inorganic EL displays, electronic paper, and the like. Hereinafter, the present invention will be explained in more detail with reference to examples, comparative examples, and experimental examples. Those skilled in the art should understand that these examples, comparative examples, and experimental examples are merely illustrative examples, and the scope of the present invention is not limited thereto. Examples 1 to 4 and Comparative Examples 1 to 3 : Preparation of Hard Coating Composition The hard coating composition was prepared using the composition shown in Table 1 below (unit: wt%). [Table 1] Silicone rubber fine particles: X-52-7030 (Shin-Etsu) Compound of Chemical Formula 4 (Shin-A T & C, SOU-1700B) Compound of Chemical Formula 7 (DPEA-126, Nippon Kayaku) Dendrimer: SP1106 ( Miwon Specialty Chemicals) Inorganic particles: Silicon dioxide particles, particle size 10-15 nm Photoinitiator: 1-Hydroxycyclohexylphenyl ketone Solvent: Methyl ethyl ketone Experimental Example 1 : Prepared in Examples and Comparative Examples The hard coating composition was coated on the surface of a polyimide film (100 μm) at a thickness of 45 μm, dried at 110 ° C. for 5 minutes, and then exposed to 1.5 in a metal halide lamp. The light of J was cured to prepare a hard coating film. The physical properties of the prepared hard coating film were measured according to the following methods, and the results are shown in Table 2 below. (1) Pencil hardness A pencil hardness tester (PHT, Korea Sukbo Science) was used to measure pencil hardness by applying a load of 1 kg. A pencil manufactured by Mitsubishi Corporation was used and five measurements were performed for each pencil hardness. (2) Impact resistance at room temperature 44 g steel balls were freely dropped on the surface of the hard coating film at room temperature for each height, and then the minimum height at which cracking of the hard coating film was observed was confirmed. <Evaluation Criteria> ◎: Fracture occurred at a height of 50 cm or more ◯: Fracture occurred at a height of 30 cm or more and less than 50 cm △: Fracture occurred at a height of 10 cm or more and less than 30 cm ×: at Fracture occurs at a height of less than 10 cm (3) Impact resistance at high temperature and high humidity. The hard coating film is left to stand at 85 ° C and 85% relative humidity for 24 hours, and 44 g steel balls are freely dropped for each height. The minimum height at which the cracking phenomenon of the hard coating film was observed on the surface of the hard coating film and then confirmed. <Evaluation Criteria> ◎: Fracture occurred at a height of 50 cm or more ◯: Fracture occurred at a height of 30 cm or more and less than 50 cm △: Fracture occurred at a height of 10 cm or more and less than 30 cm ×: at Fracture occurs at a height of less than 10 cm. (4) Adhesively draw 11 straight lines and 100 regular squares horizontally and vertically on the coated surface of the film at intervals of 1 mm, and then use tape (CT-24, Nichiban Co. , Ltd., Japan) performed three peel tests. Three of the 100 squares were tested and the average was recorded. The adhesion was recorded as follows. Adhesion = n / 100 n: The number of unpeeled squares among all squares 100: The total number of squares Therefore, when none of them are peeled, it is recorded as 100/100. (5) Curling After placing a square-shaped film sample cut into A4 size (29.7 × 21.0 cm) on a flat glass plate with the coated surface of the guide film facing upward, measure at 25 ° C and 50% RH The distance from the rectangular glass plate, and the average value is used as the measurement value. (6) Mandrel To evaluate the fracture properties, the coated film samples cut into a size of 1 cm × 10 cm are placed on iron rods each having a diameter (2 ɸ-20 ɸ), and the coated layer is guided upward and Fold by hand and indicate the minimum diameter at which no cracks appear on the surface. [Table 2] As can be seen from Table 2, the hard coating films prepared using the hard coating compositions of Examples 1 to 4 of the present invention are excellent in hardness, impact resistance, adhesion, curling properties, and crack resistance. On the other hand, it was confirmed that in the case of the hard coating films prepared using the hard coating compositions of Comparative Examples 1 to 3, hardness, impact resistance, adhesion, curling properties, or cracking properties were reduced. Specifically, it was found that at least one of the impact resistance and hardness of the hard coating films prepared using the hard coating compositions of Comparative Examples 1 to 3 was poor. Although specific embodiments of the present invention have been shown and described in detail, those skilled in the art should understand that the specific technologies are merely preferred embodiments and that the scope of the present invention is not limited thereto. Those skilled in the art will understand that various changes and modifications can be made to the present invention without departing from the spirit and scope of the invention. Therefore, the essential scope of the present invention is to be defined by the scope of the accompanying patent applications and their equivalents.