200900746 九、發明說明 【發明所屬之技術領域】 本發明關於防眩膜用粒子及防眩膜用粒子組成，更詳 細地，關於藉由使含於光學材料成形品中，可得到具有優 異的防眩性，同時防眩性與白濁感（透射性）的平衡非常 優異之光學材料成形品的防眩膜用粒子，以及含有前述防 眩膜用粒子的防眩膜用粒子組成物。 【先前技術】 目前’作爲電視、個人電腦等的顯示裝置，正使用液 晶顯示裝置。此液晶顯示裝置，於透射光或反射光在其表 面上不恰當地擴散的情況，從正面觀看時，看起來非常晃 眼’或由於螢光燈等來自周圍環境的光照原樣地反射，而 有影像映入（所謂的「耀眼」）等的問題。以防止如上述 的問題當作目的，通常在液晶顯示裝置的表面上設置防眩 薄膜（防眩膜）。 作爲此防眩薄膜，有揭示含有由合成樹脂所成的粒子 之薄膜等（例如參照專利文獻1 )。專利文獻1記載的薄 膜，係藉由對於上述薄膜所含有的粒子之數平均粒徑而言 ，使黏結劑層的厚度成爲指定比例，而不減低透射性，但 發揮防眩性者。 又，有報告使用具有由芯部與殼部所成的芯-殼構造 之複合粒子，使複數的複合粒子之殼部各自結合，而成爲 薄膜狀的光學薄膜（例如參照專利文獻2参照）。 -5- 200900746 [專利文獻1 ]特開平8 - 3 0 9 9 1號公報 [專利文獻2]特開平4-9820 1號公報 【發明內容】 然而，專利文獻1中所記載的防眩薄膜，就其防眩性 而言尙有改良的餘地’而且希望開發出防眩性與白濁感（ 透射性）的平衡非常優異的光學材料成形品（防眩薄膜） ’以及可製造如此光學材料成形品（防眩薄膜）的材料。 又’專利文獻2的光學薄膜具有芯部爲高密度分散的 狀態的優點’但就防眩性而言尙有改良的餘地，而且就防 眩性與白濁感（透射性）的平衡方面而言，亦尙有改良的 餘地。 本發明鑒於如此的先前技術所具有的問題，提供藉由 使含於光學材料成形品中，可得到具有優異的防眩性，同 時防眩性與白濁感（透射性）的平衡非常優異之光學材料 成形品的防眩膜用粒子，以及含有前述防眩膜用粒子的防 眩膜用粒子組成物。 本發明人們爲了解決上述問題，進行精心檢討，結果 發現藉由具備指定厚度的殻層之粒子、含上述粒子的組成 物，可以解決上述問題，終於完成本發明。 具體地’本發明提供以下的防眩膜用粒子、及防眩膜 用粒子組成物。 [1] 一種防眩膜用粒子，具備：（a)芯粒子，係由第 一聚合物所成；及（b)殼層，係被覆於前述（a)芯粒子 -6 - 200900746 的表面之至少一部分，其厚度在0.1〜2·〇μιη的範圍 由第二聚合物所成；其平均粒徑爲0·8〜10^m。 [2 ]如前述[1 ]記載的防眩膜用粒子，其中前述第 合物的折射率係不同於前述第二聚合物的折射率。 [3 ]如前述[1 ]記載的防眩膜用粒子，其中前述第 合物所含有的單體單位之至少一種係不同於前述第二 物所含有的單體單位。 [4]如前述[1 ]記載的防眩膜用粒子，其中前述第 合物含有：（al) 20〜98質量％的芳香族乙烯系單體 ，（a2 ) 0〜40質量％的含極性官能基的單體單位， )0〜40質量％的多官能單體單位，及（a4 ) 0〜10 % 的其它單體單位，（但是，（al ) + ( a2 ) + ( a3 )— )=1 0 0 質量 ％ )。 [5 ]如前述[1 ]記載的防眩膜用粒子，其中前述第 合物含有：（bl) 0〜90質量％的芳香族乙烯系單體 ，（b2)10〜100質量％的（甲基）丙烯酸酯單體單 (b3) 0〜40質量％的多官能單體單位，及（b4) 0〜 量％其它單體單位，（但是，（bl ) + ( b2 ) + ( b3〕 b4) =1〇〇質量％)。 [6]如前述[1 ]記載的防眩膜用粒子，其中以前述 芯粒子當作種子聚合物粒子，藉由種子聚合來形成前 b )殼層。 [7 ] —種防眩膜用粒子組成物，包含：（A )前述 載的防眩膜用粒子，及（B )黏結劑成分。 內， 一聚 一聚 聚合 一聚 單位 (a3 r量％ -(a4 二聚 單位 位， 10質 丨+ ( 述（ Π]記 -7- 200900746 [8] —種防眩膜用粒子組成物之製造方法，具有： 有前述[1 ]記載的防眩膜用粒子的乳液去除溶劑，以得 燥狀態的前述防眩膜用粒子之步驟，及混合所得到的 防眩膜用粒子及黏結劑成分之步驟。 [9] 一種光學材料成形品，係由含有樹脂成分與 [1 ]記載的防眩膜用粒子的樹脂材料所成。 [1 〇 ]如HU述[9 ]記載的光學材料成形品，其係防眩 、光擴散薄膜、光擴散板、偏光板、或導光板。 [11 ] 一種防眩膜，具備：基材層；及，防眩層， 成在該基材層的至少一面上’且由前述[7 ]記載的防眩 粒子組成物所成。 本發明的防眩膜用粒子’藉由使含於光學材料成 中’達成可得到具有優異的防眩性，同時防眩性與白 (透射性）的平衡非常優異之光學材料成形品的效果 本發明的防眩膜用粒子組成物，係達成可得到具 異的防眩丨生’问時防眩性與白濁感（透射性）的平衡 優異之光學材料成形品的效果。 依照本發明的防眩膜用粒子組成物之製造方法， 可製造能得到具有優異的防眩性，同時防眩性與白濁 透射性）的平衡非常優異之光學材料成形品的防眩膜 子組成物之效果。 本發明的先學材料成形品及本發明的防眩膜，係 具有優異的防眩性，同時防眩性與白濁感（透射性） 衡非常優異之效果。 由含 到乾 前術 N r% 目IJ述 薄膜 係形 膜用 形品 濁感 〇 有優 非常 達成 感（ 用粒 達成 的平 -8 - 200900746 【實施方式】 實施發明的最佳形態 以下說明用於實施本發明的最佳形態，惟本發明不受 以下的實施形態所限定。即，在不脫離本發明的宗旨之範 圍內，以熟習該項技術者的通常知識爲基礎，對以下的實 施形態加以適當的變更、改良等者，可理解應屬於本發明 的範圍內。 [1 ]防眩膜用粒子： 本發明的防眩膜用粒子’具備由第一聚合物所成（a )芯粒子，及被覆於前述（a)芯粒子之表面的至少一部 之厚度在0.1〜2.0 μηι的範圍內之由第二聚合物所成的（b )殼層，且其平均粒徑爲0·8〜ιομπι。藉由含有如此的粒 子，可得到具有優異的防眩性，同時防眩性與白濁感（透 射性）的平衡非常優異之光學材料成形品。以下對其作詳 細說明。 [1 -1 ] ( a )芯粒子·_ 構成本發明的防眩膜用粒子之（a )芯粒子’係由第 一聚合物所成。具體地’可舉出苯乙烯系聚合物、苯乙 烯-丁二烯共聚物等的苯乙烯系聚合物、或丙烯酸酯系聚 合物等。 第一聚合物的重量平均分子量較佳爲10萬以上，更 -9 - 200900746 佳爲20萬以上，特佳爲50萬以上。上述重量平均分子量 若低於1 〇萬，則在聚合第二聚合物時，由於該第二聚合 物會浸漬到第一聚合物內部，故有無法成爲明確的芯殼構 造之虞。此處，本說明書中的「重量平均分子量」係指藉 由凝膠滲透層析（GPC )法，以聚苯乙烯當作標準物質所 測定之値。 (a)芯粒子的平均粒徑較佳爲0.3〜4.0 μιη，更佳爲 0.5〜2·0μιη，特佳爲 〇.8〜1·5μιη。上述平均粒徑若低於 0.3 μ m ’則有得不到充分的光擴散性之虞。另一方面，若 爲4.0 μιη以上，則有聚合安定性變差之虞。 再者’ （a )芯粒子的平均粒徑，係指對本發明的防 眩膜用粒子，進行SEM照片的圖像解析而測定之値。具 體地，對至少1 0個防眩膜用粒子的SEM照片，分別計測 (a )芯粒子的最長直徑（（a )芯粒子最長直徑），以此 (a )芯粒子最長直徑之平均値當作「（ a )芯粒子的平均 粒徑」。 第一聚合物較佳爲係以指定比例含有（a丨）芳香族乙 烯系單體單位（以下亦記載爲「構成單位（a 1 )」）、（ a2 )含極性官能基的單體單位（以下亦記載爲「構成單位 (a2 )」）、（a3 )多官能單體單位（以下亦記載爲「構 成單位（a3 )」）、及（a4 )其它單體單位（以下亦記載 爲「構成單位（a4 )」）者。 [1-1-1] ( al )芳香族乙烯系單體單位·· -10- 200900746 作爲構成構成單位（al)所用的芳香族乙烯系單體 可舉出苯乙烯、α-甲基苯乙烯、乙烯基甲苯、對甲基苯 烯、2 -甲基苯乙烯、3 -甲基苯乙烯' 4 -甲基苯乙烯、4-基苯乙烯、4-第三丁基苯乙烯、3，4-二甲基苯乙烯、4-氧基苯乙烯、4-乙氧基苯乙烯、2-氯苯乙烯、3-氯苯乙 、4 一氯苯乙烯、2,4-二氯苯乙烯、2,6-二氯苯乙烯、 氯-3-甲基苯乙烯、1-乙烯基萘、2-乙烯基吡啶、4-乙烯 吡啶等。於此等之中，較佳爲苯乙烯、α-甲基苯乙烯。 等芳香族乙烯系單體可爲單獨一種，或組合二種以上來 用。 上述構成單位（a 1 )的比例，於以構成單位（a 1 ) 構成單位（a2 )、構成單位（a3 )、及構成單位（a4 ) 合計當作100質量％時，較佳爲20〜98質量％，更佳爲 〜95質量％，特佳爲40〜90質量％。第一聚合物所含有 構成單位（al )之比例若低於20質量％，則芯粒子與殼 的折射率之差異變小，於含有如此芯殼構造的粒子之光 材料成形品中，有無法展現良好的防眩機能之虞。另一 面，若超過9 8質量％，則聚合安定性有變差之虞。 [1 -1 -2] ( a2 )含極性官能基的單體單位： 構成構成單位（a2 )所用的含極性官能基的單體， 在其分子中含有極性官能基的單體。作爲此極性官能基 可舉出羧基、氰基、羥基、縮水甘油基、酯基等當作合 例。於此等之中，從有助於聚合安定性的觀點來看，較 乙 乙 甲 烯 4- 基 此 使 、 的 25 的 層 學 方 係 > 適 佳 -11 - 200900746 爲具有羧基或羥基的單體。再者，以下例示的單體可爲單 獨一種，或組合二種以上來使用。 作爲具有羧基的單體，例如可舉出（甲基）丙烯酸、 巴豆酸、肉桂酸、馬來酸、馬來酸酐、富馬酸、伊康酸、 伊康酸酐、馬來酸單甲酯、馬來酸單乙酯、伊康酸單甲酯 、伊康酸單乙酯、六氫苯二甲酸單- 2-(甲基）丙烯醯氧基 乙酯等之含羧基的不飽和單體、及其酐類等。於此等之中 ，較佳爲（甲基）丙烯酸。 作爲具有氰基的單體，例如可舉出（甲基）丙烯腈、 巴豆腈、肉桂酸腈等的氰化乙烯系單體；2 -氰基乙基（甲 基）丙烯酸酯、2-氰基丙基（甲基）丙烯酸酯、3-氰基丙 基（甲基）丙烯酸酯等。於此等之中，較佳爲（甲基）丙 烯腈。 作爲具有羥基的單體，例如可舉出羥基甲基（甲基） 丙烯酸酯、（甲基）丙烯酸2-羥乙酯、（甲基）丙烯酸6-羥己酯、（甲基）丙烯酸4 -羥基環己酯、新戊二醇單（甲 基）丙烯酸酯等的單（甲基）丙烯酸酯羥基（環）烷類； (甲基）丙嫌酸3 -氯-2-經丙酯、（甲基）丙嫌酸3-胺基_ 2 -羥丙酯等的單（甲基）丙烯酸取代羥基（環）烷酯類等 。於此等之中’較佳爲（甲基）丙稀酸經甲醋。 作爲具有縮水甘油基的單體，例如可舉出烯丙基縮水 甘油基醚、（甲基）丙烯酸縮水甘油酯、甲基丙烯酸甲基 縮水甘油酯、（甲基）丙烯酸環氧化環己酯等。於此等之 中’較佳爲（甲基）丙烯酸縮水甘油醋。 -12- 200900746 作爲具有酯基的單體’例如可舉出（甲基）丙稀酸甲 酯、（甲基）丙嫌酸乙醋、（甲基）丙嫌酸丙酯、（甲基 )丙烯酸正己酯、（甲基）丙烯酸2 -乙基己酯、（甲基） 丙烯酸環己酯等的（甲基）丙烯酸酯（環）烷類；（甲基 )丙烯酸2 -甲氧基乙酯、（甲基）丙烯酸對甲氧基環己酯 等的（甲基）丙烯酸酯烷氧基（環）烷類；三羥甲基丙烷 三（甲基）丙烯酸酯等的多價（甲基）丙烯酸酯類；醋酸 乙烯酯、丙酸乙烯酯、維沙提克（versatic )酸乙烯酯等 的乙烯酯類等。於此等之中，較佳爲（甲基）丙烯酸甲酯 〇 上述構成單位（a2 )的比例，於以構成單位（a 1 )、 構成單位（a2 )、構成單位（a3 )、及構成單位（a4 )的 合計當作1 〇 〇質量％時，較佳爲〇〜4 0質量％，更佳爲2〜 40質量％，特佳爲4〜35質量％，最佳爲8〜30質量％。 第一聚合物所含有的構成單位（a2 )之比例若低於2質量 %，則聚合安定性有變差之虞。另一方面，若超過40質量 %，則聚合安定性有變差之虞。 [1-1-3] ( a3 )多官能單體單位：. 構成構成單位（a3 )所用的多官能單體，例如可舉出 二乙烯基苯所代表的非共軛乙烯基化合物、或三羥甲基丙 烷三甲基丙烯酸酯（TMPMA )所代表的多價丙烯酸酯化 合物等之具有至少2個以上的共聚合性雙鍵之單體當作合 適例。 -13- 200900746 又，作爲前述多價丙烯酸酯化合物’例 二醇二丙烯酸酯、1,3 -丁二醇二丙烯酸酯、 丙烯酸酯、聚丙二醇二丙烯酸酯等的二丙烯 三羥甲基丙烷三丙烯酸酯、四羥甲基甲烷三 三丙烯酸酯類、乙二醇二甲基丙烯酸酯、二 丙烯酸酯、三乙二醇二甲基丙烯酸酯、聚乙 烯酸酯、1,3 -丁二醇二甲基丙烯酸酯、1，4-丙烯酸酯、1,6-己二醇二甲基丙烯酸酯、新 丙烯酸酯等的二甲基丙烯酸酯類、三羥甲基 烯酸酯、三羥甲基乙烷三甲基丙烯酸酯等的 酯類等。 於以上的多官能單體之中，尤其可舉出 乙二醇二甲基丙烯酸酯、三羥甲基丙烷三甲 當作合適例。再者，於此等之中，從聚合安 看，較佳爲二乙烯基苯、三羥甲基丙烷三甲 再者，此等單體可爲單獨一種，或組合二種 上述構成單位（a3 )的比例，於以構成 構成單位（a2 )、構成單位（a3 )、及構成 合計當作100質量％時’較佳爲〇〜40質量？ 3 5質量％，特佳爲1 〇〜2 0質量％。第一聚合 成單位（a 3 )之比例若超過4 0質量％，則聚 差之虞。 [1-1-4] ( a4 )其它單體單位： 如可舉出聚乙 1,6 -己二醇二 酸酯化合物、 丙烯酸酯等的 乙二醇二甲基 二醇二甲基丙 丁二醇二甲基 戊二醇二甲基 丙烷三甲基丙 三甲基丙烯酸 二乙烯基苯、 基丙烯酸酯等 定性的觀點來 基丙烯酸酯。 以上來使用。 單位（a 1 )、 單位（a4 )的 /〇，更佳爲5〜 物所含有的構 合安定性有變 -14- 200900746 胃一*$合物亦可含有與上述各種單體可共聚合的其它 n it m $之單體單位。作爲構成此構成單位（a4)的其它 單體’例如可舉出N_羥甲基（甲基）丙烯醯胺、ν,ν-二 經甲基（甲基）丙烯醯胺等的Ν-羥甲基化不飽和羧酸醯 月安Μ ; 2-；!甲胺基乙基丙烯醯胺等的含胺烷基的丙烯醯胺 類；（甲基）丙烯醯胺、Ν -甲氧基甲基（甲基）丙烯醯胺 ' Ν，Ν-伸乙基雙（甲基）丙烯醯胺、馬來酸醯胺、馬來醯 亞胺等的不飽和羧酸之醯胺類或醯亞胺類；Ν_甲基丙烯醯 胺、Ν，Ν-二甲基丙烯醯胺等的Ν_單烷基（甲基）丙烯醯 胺、Ν,Ν-二烷基丙烯醯胺類；2-二甲胺基乙基（甲基）丙 烯酸酯等的含胺烷基的（甲基）丙烯酸酯類；2-(二甲基 胺基乙氧基）乙基（甲基）丙烯酸酯等的含胺基烷氧基烷 基的（甲基）丙烯酸酯類；氯乙烯、偏二氯乙烯、脂肪酸 乙烯酯等的鹵化乙烯化合物類；：1,3_ 丁二烯、2-甲基-1,3-丁二烯、2-氯-1,3-丁二烯、2，3-二甲基-1，3-丁二烯等的共 軛二烯化合物類等。再者，此等單體可爲單獨一種，或組 合二種以上來使用。 [1-2] ( b )殼層： 構成本發明的防眩膜用粒子之（b )殻層’係被覆於 上述（a)芯粒子的表面之至少一部分，其厚度在0.1〜 2·〇μιη的範圍內，由第一聚合物所成。藉由如此地構成（ b )殻層，對含有本發明的防眩膜用粒子之防眩膜等的光 學材料成形品所入射的光’係在（b )殼層或（a )芯粒子 -15- 200900746 的表面被反射，而成爲反射光’在（b)殼層所反射的反 射光與穿透（b)殼層而被（a)芯粒子的表面所反射的反 射光係發生相位差。因此’由於具有指定波長的反射光係 互相抵銷而衰減，即由於在（a )芯粒子之表面所反射的 反射光係被（b)殼層的表面反射而干涉反射光，故含有 本發明的防眩膜用粒子之光學材料成形品，係具有優異的 防眩性之有利點。又，亦具有防眩性與白濁感（透射性） 的平衡非常優異的有利點。 具體地’如第1圖所示地，於（b )殼層的厚度滿足 式：d={ ( 1/4 ) χλ} + { ( 1/2 ) ηχλ}(但是，n 爲整數）時 ’波長λ的入射光Ν係成爲與其反射光Η互相抵銷。更具 體地，對於波長600nm的入射光Ν而言，若（b )殼層的 厚度d爲0_15μιη(150ηιη)(上述式中，n = 〇)，則於（b )殼層11所反射的反射光H-1與穿透（b)殻層11而在 (a)芯粒子12的表面被反射的反射光H-2中，發生（ 1 /2 ) λ的相位差。因此，藉由防眩膜用粒子，可衰減波長 6 0 0nm的入射光Ν。 (b)殻層的厚度爲在0.1〜2.Ομηι的範圍，較佳爲在 0.2〜1.5 μιη的範圍，更佳爲在0.2〜1.0 μηι的範圍。上述 厚度若低於Ο.ίμηι，則由於殼層太薄而有容易發生部分沒 有殼層的地方之虞。另一方面，若超過2·0μηι，則光在達 到芯殼界面之前衰減，有無法由芯殼界面的反射來得到干 渉效果之虞。再者，（b )殼層的厚度，係指對本發明的 防眩膜用粒子，進行SEM照片的圖像解析而測定之値。 -16- 200900746 具體地，於防眩膜用粒子的SEM照片中，藉由後述 的方法，計測該粒子的最長直徑（全體粒子最長直徑）。 由此全體粒子最長直徑之値，扣除第一聚合物（芯粒子） 的最長直徑（芯粒子最長直徑）之値，以所得到的値當作 殼層的厚度來算出，對至少1 0個防眩膜用粒子進行算出 ，以它們的平均値當作「（ b )殻層的厚度」。 第二聚合物的重量平均分子量較佳爲5萬以上，更佳 爲10萬以上，特佳爲20萬以上。上述重量平均分子量若 低於1 〇萬，則所製造的光學材料成形品之耐熱性、耐溶 劑性有不充分之虞。 第二聚合物較佳爲係以指定比例含有（b 1 )芳香族乙 嫌系單體單位（以下亦記載爲「構成單位（bl)」）、（ b2)(甲基）丙烯酸酯單體單位（以下亦記載爲「構成單 位（b2 )」）、（b3 )多官能單體單位（以下亦記載爲「 構成單位（b3)」）、及（b4)其它單體單位（以下亦記 載爲「構成單位（b4 )」）者。 (bl)芳香族乙烯系單體單位可合適地採用與上述（ al)芳香族乙烯系單體單位同樣者。構成單位（bl)的比 例’於以構成單位（b 1 )、構成單位（b2 )、構成單位（ b 3 )、及構成單位（b 4 )的合計當作1 〇 〇質量％時，較佳 爲0〜90質量％，更佳爲〇〜8〇質量％，特佳爲0〜70質 量％。第二聚合物所含有的構成單位（b 1 )之比例若超過 9 0質量％ ’則芯粒子與殼層的折射率之差異變小，於含有 如此芯殼構造的粒子之光學材料成形品中，有無法展現良 -17- 200900746 好的防眩機能之虞。 作爲構成構成單位（b2)所用的（甲基）丙烯酸酯單 體，例如可舉出甲基丙烯酸曱酯（MMA )、(甲基）丙烯 酸乙酯、（甲基）丙烯酸丙酯、（甲基）丙烯酸正己酯、 (甲基）丙烯酸2-乙基己酯、（甲基）丙烯酸環己酯等的 (甲基）丙烯酸（環）烷酯類；（甲基）丙烯酸2-甲氧基 乙酯、（甲基）丙烯酸對甲氧基環己酯等的（甲基）丙烯 酸酯烷氧基（環）烷類；三羥甲基丙烷三（甲基）丙烯酸 酯等的多價（甲基）丙烯酸酯類；醋酸乙烯酯、丙酸乙烯 酯、維沙提克酸乙烯酯等的乙烯酯類等。於此等之中，較 佳爲甲基丙烯酸甲酯。 第一聚合物的折射率係不同於第二聚合物的折射率。 此處’若含有上述構成單位（b2 )，則與（a )芯粒子（ 第一聚合物）比較下，（b)殼層（第二聚合物）的折射 率會降低。如此地，與（a )芯粒子比較下，若降低（b ) 殻層的折射率，則芯粒子與殼層的界面發生用於反射光的 不同組成界面，該不同組成界面的反射光與殼層外殻的反 射光會干渉，具有減低反射光強度的優點。即，於所得到 的光學材料成形品中，展現良好的防眩機能。 再者’ （a )芯粒子及（b )殼層的折射率係如以下所 測定之値。首先’合成由第一聚合物及第二聚合物所分別 含有的各單體單位所構成的各聚合物，將所合成的各聚合 物分別塗佈在基材上，在7 0 °C使乾燥2分鐘，分別形成厚 度1 〇 μ m的薄膜。然後，以阿貝折射率計來測定所形成的 -18- 200900746 薄膜之折射率。使用所測定的上述各聚合物之折射率（薄 膜的折射率），由構成各單體單位的各單體在第一聚合物 及第二聚合物中的各自混合比率來算出。 例如，第一聚合物（（a )芯粒子）的折射率係可如 以下地測定。首先，製造（合成）（al)芳香族乙烯系單 體以單獨聚合而得之聚合物（以下亦記載爲「（al)聚合 物」）、（a2 )含極性官能基的單體以單獨聚合而得之聚 合物（以下亦記載爲（a2)聚合物」）、及（a3)多官能 單體以單獨聚合而得的聚合物（以下以下亦記載爲「（ a3 )聚合物」）。然後，將此等（a 1 )〜（a3 )聚合物分別 塗佈在基材上，於70°C使乾燥2分鐘，以分別製作厚度 ΙΟμπι之由（ai)〜（a3)聚合物所成的（al)〜（a3) 薄膜。對所製作的各（a 1 )〜（a3 )薄膜，以阿貝折射率 計測定各自的折射率X、Y、Z。然後，由各自的折射率X 、Y、Z，及第一聚合物的製造時所用的（ai)〜（a3)的 各單體之混合比率X、y、z，依照下式來算出。 式：{Xx(x/100)} + {Yx(y/100)}+{Zx(z/100)} (b3 )多官能單體單位、及（b4 )其它單體單位較佳 係以同樣的比例合適地分使用與上述（a3 )多官能單體單 位、及（a4 )其它單體單位同樣者。 本發明的防眩膜用粒子之平均粒徑爲〇 . 8〜1 〇 μιη，較 佳爲 〜8·0μηι，更佳爲 2.0〜5·0μηι。上述平均粒徑若 低於〇 . 8 μιη ’則得不到充分的光散射，防眩性的表現有變 不充分之虞。另一方面，若爲1 0 μηι以上，則由於所得到 -19- 200900746 的防眩膜用粒子太大，於光學材料成形品（尤其薄膜）中 有不能將上述粒子包住在內之虞。 再者’防眩膜用粒子的平均粒徑，係指藉由對其進行 SEM照片的圖畫像解析而測定之値。具體地，對至少ί 〇 個防眩膜用粒子的SEM照片，分別計測防眩膜用粒子的 最長直徑（全體粒子最長直徑），以此全體粒子最長直徑 的平均値當作「防眩膜用粒子的平均粒徑」。 於本發明的防眩膜用粒子中，第一聚合物的組成與第 二聚合物的組成可爲相同或不同，但較佳爲第一聚合物所 含有的單體單位之至少一種係不同於第二聚合物所含有的 單體單位。即，於此情況下，構成防眩膜用粒子的單體單 位中之至少一種，係成爲僅含於第一聚合物與第二聚合物 中任——方的聚合物中。如此地，可得到其內部具有折射 率差的粒子。即，在粒子內部可形成不同組成界面。 [1 -3 ]防眩膜用粒子的製造方法： 本發明的防眩膜用粒子，例如可以（a )芯粒子當作 種子聚合物粒子，藉由種子聚合來形成（b)殼層。具體 地，可依照以下所示的方法來製造。 首先，（a )芯粒子係可藉由使用水性介質的一般乳 化聚合法來獲得。此「水性介質」係指以水當作主成分的 介質。具體地，於該水性介質中，水的含有率較佳爲40 質量％以上，更佳爲50質量％以上。作爲可與水倂用的其 它介質，可舉出酯類、酮類、酚類、醇類等的化合物。 -20- 200900746 乳化聚合的條件係可依照眾所周知的方法。例如，以 所使用的單體之總量爲1〇〇質量份時，通常使用100〜500 質量份的水，可在聚合溫度-10〜100 °c (較佳-5〜100 °c， 更佳0〜9 0 °c )、聚合時間0.1〜3 0小時（較佳2〜2 5小 時）的條件下進行。作爲乳化聚合的方式，可以採用將單 體一倂投入的批式方式，將單體分割或連續地供給之方式 ，將單體的預乳液分割或連續地添加之方式，或將此等方 式作階段地組合之方式等。又，視需要可以使用一種或二 種以上的通常乳化聚合所用的分子量調節劑、螯合化劑、 無機電解質等。 於乳化聚合時使用引發劑的情況中，作爲該引發劑， 可以使用過硫酸鉀、過硫酸銨等的過硫酸鹽；苯甲醯基過 氧化物、月桂醯基過氧化物、第三丁基過氧-2-乙基己酸酯 等的有機過氧化物；偶氮雙異丁腈、二甲基-2，2’-雙氮異 丁酸酯、2_胺甲醯基氮雜異丁腈等的偶氮化合物；含有具 過氧化基的自由基乳化性化合物之自由基乳化劑、亞硫酸 氫鈉、及硫酸亞鐵等的還原劑所組合成的氧化還原系等。 又，於使用乳化劑時，作爲該乳化劑，可以使用選自於眾 所周知的陰離子性乳化劑、非離子性乳化劑、及兩性乳化 劑所組成族群的一種以上。再者，亦可以使用分子內具有 不飽和雙鍵的反應性乳化劑等。 乳化聚合時所使用的分子量調節劑係沒有特別的限制 。作爲分子量調節劑的具體例，可舉出正己基硫醇、正辛 基硫醇、正十二基硫醇、三級十二基硫醇、正十六基硫醇 -21 - 200900746 、正十四基硫醇、三級十四基硫醇、锍基乙酸等的硫醇類 :二甲基黃原酸二硫化物、二乙基黃原酸二硫化物、二異 丙基黃原酸二硫化物等的黃原酸二硫化物類；四甲基秋蘭 姆二硫化物、四乙基秋蘭姆二硫化物、四丁基秋蘭姆二硫 化物等的秋蘭姆二硫化物類；氯仿、四氯化碳、四溴化碳 、溴化乙烯等的鹵化烴類；五苯基乙烷、α-甲基苯乙烯二 聚物等的烴類；丙烯醛、甲基丙烯醛、烯丙醇' 2-乙基己 基硫甘醇、蔥品油烯、α-萜品烯、γ-萜品烯、雙戊烯、 1，1-二苯基乙烯等。再者，此等分子量調節劑可爲單獨一 種或組合二種以上來使用。於此等之中，更合適爲使用硫 醇類、黃原酸二硫化物類、秋蘭姆二硫化物類、1,1 -二苯 基乙烯、α-甲基苯乙烯二聚物。 乳化聚合結束時，單體的聚合轉化率較佳爲80質量％ 以上，更佳爲90質量％以上，特佳爲95質量％以上。於 第一聚合物的聚合轉化率低於80質量％的狀態下，若將用 於構成第二聚合物的單體投入，則聚合安定性有變差之虞 ，或由於新的微粒子生成而有品質不均勻之虞。 接著，於如以上所得之（a )芯粒子的存在下，使構 成第二聚合物的單體進行聚合。即，於使用所得到的（a )芯粒子當作種子聚合物粒子的狀態下’使構成第二聚合 物的單體進行種子聚合，則可在（a )芯粒子的表面上形 成（b )殼層。例如，可於分散有（a )芯粒子的水性介質 中，將構成第二聚合物的單體或其預乳液一倂 '分割、或 連續地滴下。此時，所使用的（a )芯粒子之量’係按照 -22- 200900746 目的之芯粒子的直徑及殻層的厚度而適宜改變用量，但對 於100質量份的構成第二聚合物的單體而言，較佳爲1〜 1 000質量份。再者，於聚合時使用引發劑或乳化劑的情況 中，可以使用與（a )芯粒子之製造時所可使用者同樣。 又，關於聚合時間等的條件，亦可爲與（a )芯粒子的製 造時之條件同樣的條件。 (a )芯粒子的表面上所形成的（b )殼層之厚度的調 整，係可藉由對單體的重量而言，調整芯粒子的重量來進 行。具體地，除了在平均粒徑爲2·0μηι的（a)芯粒子之 表面上形成厚度〇.6μηι的（b )殼層，可對於100質量份 的單體而言，使用12 0質量份的（a )芯粒子，進行聚合 [2]防眩膜用粒子組成物： 本發明的防眩膜用粒子組成物係含有上述（A )防眩 膜用粒子（以下亦記載爲「（ A )粒子」）'及（B )黏結 劑成分（以下亦記載爲「（ B )成分」）。若使用如此的 防眩膜用粒子組成物，則可得到防眩性優異的光學材料成 形品。以下說明其詳細。 本發明的防眩膜用粒子組成物中所含有的（B )成分 ’可爲透明且例如在樹脂製的薄片等之表面上分散及一體 化（A)防眩膜用粒子者’其種類係沒有特別的限定。（b )成分例如是聚醋酸乙烯酯、聚乙烯基醇、聚氯乙烯、聚 乙稀基縮丁醛、聚（甲基）丙烯酸酯、硝基纖維素等的熱 -23- 200900746 塑性樹脂；苯酚樹脂、蜜胺樹脂、聚酯樹脂、聚胺甲酸酯 樹脂、環氧樹脂等的熱硬化性樹脂等。此等（B )成分可 爲單獨一種或組合二種以上來使用。 (B)成分之全光線透射率較佳爲8〇%以上，更佳爲 9 0 %以上。上述全光線透射率若爲8 0 %以上，則有能製造 透光性更優異的光學材料成形品之優點。再者，本說明書 中所言的「全光線透射率」係指根據〗I s K 7 1 0 5所測定之 値。 (B )成分的比例，對於1 〇 〇質量份的（a)粒子而言 ，較佳爲1〜10000質量份，更佳爲2〜5000質量份’特 佳爲3〜1 0 0 0質量份。（B )成分的比例若低於1質量份 ’則例如在樹脂製的薄片等之表面上使（A )粒子分散一 體化係有變困難之虞。另一方面，（B)成分的比例若超 過1 00 00質量份，由於所得到的光學材料成形品（尤其薄 膜）內的粒子含量太少，有不能表現光散射能力之虞。 於本發明的防眩膜用粒子組成物中，除了（ A )粒子 及（B )成分以外’視需要亦可含有硬化劑、分散劑、染 料等的其它成分。 其它成分的比例，對於總量1 0 0質量份的（A )粒子 及（B)成分而言，較佳爲0〜10質量份，更佳爲0〜5質 量份’特佳爲0〜3質量份。上述比例若超過10質量份， 則全光線透射率有減少之虞。 本發明的防眩膜用粒子組成物，例如可如以下地製造 。首先’從由上述的防眩膜用粒子之製造方法所得之含有 -24- 200900746 防眩膜用粒子的乳液中去除溶劑，得到乾燥狀態的防眩膜 用粒子（第一步驟）。於此第一步驟中，由乳液去除溶劑 的方法係沒有特別的限定，但從可簡便地成爲乾燥狀態之 觀點來首’較佳爲冷凍乾燥方法、噴霧乾燥方法。 再者’於第一步驟中’較佳爲乾燥直到溶劑的比例成 爲5.0質量％以下爲止’更佳爲乾燥直到成爲3 . 〇質量％以 下爲止。溶劑的比例若超過5.0質量％，則起因於對有機 溶劑的再分散性變差，在上述組成物中生成凝聚物，故有 晶質變不安定之虞。 接著’進行將所得到的防眩膜用粒子與（B )成分混 合之步驟（第一步驟）。於此第二步驟中，藉由均勻混合 防眩膜用粒子、（B )成分、及視需要添加之其它成分， 可得到本發明的防眩膜用粒子組成物。再者，其它成分亦 可在混合防眩膜用粒子與（B )成分後進行添加、混合。 混合方法係沒有特別的限定，例如可以使用各種混煉機、 珠磨機、高壓均化器等。 再者’本發明的防眩膜用粒子組成物，可含有（b ) 殼層厚度（第1圖中所示的殼層之厚度d)不同的複數之 防眩膜用粒子。如此地若使含有殻層厚度不同的複數之防 眩膜用粒子，由於複數波長的入射光可發生相位差，故可 得到具有更優異防眩性的光學材料成形品。 [3]光學材料成形品： 本：胃明的光學材料成形品係由含有樹脂成分與上述防 -25- 200900746 眩膜用粒子的樹脂材料所成。此光學材料成形品，由於具 有優異的防眩性，例如可合適地用於防眩薄膜（防眩膜） 、光擴散薄膜、光擴散板、偏光板、或導光板等。於此等 之中’較佳爲防眩膜。以下說明各自的詳細。 樹脂成分係沒有特別的限定，較佳爲對可見光線具有 高透射性之透明者。再者，於本說明書中，透明除了係無 色透明，在槪念上亦包含有色透明、半透明。 從所得到的光學材料成形品之透光性能更優異的觀點 來看，樹脂成分在成爲厚度200μιη的薄片狀之情況，波長 5 5 0 nm的光線透射率較佳爲8 0 %以上，更佳爲8 5 %以上， 特佳爲90%以上。又，從必須具有可實用化程度的耐熱性 之觀點來看，樹脂成分的玻璃轉移溫度較佳爲1 00°C以上 ，更佳爲120t以上，特佳爲150°C以上。 作爲樹脂成分，例如可舉出聚對苯二酸乙二酯、聚（ 甲基）丙烯酸甲酯、聚碳酸酯、環烯烴聚合物、聚芳酯、 聚醚颯、聚苯乙烯、（甲基）丙烯酸甲酯-苯乙烯共聚物 、苯乙烯-丙烯腈共聚物等的熱塑性樹脂；環氧樹脂、乙 烯醚樹脂、具有2個以上的（甲基）丙烯醯基之（甲基） 丙烯酸酯、氧雜環丁烷樹脂、乙烯基酯樹脂等的熱或活性 能量線可硬化的硬化性樹脂。於此等之中，從與玻璃纖維 或玻璃纖維布的複合化容易，同時熱安定之觀點來看，較 佳爲熱或活性能量線可硬化的硬化性樹脂，更佳爲環氧樹 脂、具有2個以上的（甲基）丙烯醯基之（甲基）丙烯酸 酯。 -26- 200900746 樹脂成分的比例，對於1 00質量％的樹脂材料而言， 較ifc爲1〜99質量％，更佳爲10〜95質量。/。，特佳爲30〜 9〇質量％。樹脂成分的比例若低於1質量％，則有無法將 防眩膜用粒子在光學材料成形品（尤其薄膜）中固定化之 虞。另一方面’若超過99質量％，則防眩膜用粒子的光散 射能力有不能展現之虞。 另一方面’防眩膜用粒子的比例，對於1 00質量％的 樹脂材料而言，較佳爲1〜9 9質量％，更佳爲5〜9 0質量 %，特佳爲1 0〜70質量％。防眩膜用粒子的比例若低於i 質量％ ’則防眩膜用粒子的光散射能力有不能展現之虞。 另—方面，若超過99質量％，則有無法將防眩膜用粒子在 光學材料成形品（尤其薄膜）中固定化之虞。 本發明的光學材料成形品，例如可藉由將樹脂成分與 防眩膜用粒子供應給擠壓機而擠出者，進行母料化後，將 此母料供應給擠壓機，在模腔內射出而成形加工的方法等 來獲得。 [4]防眩膜： 本發明的防眩膜具備：在基材層的至少一面上所形成 的由上述防眩膜用粒子組成物所成的防眩層。 [4 -1 ]基材層： 基材層較佳係由透明（無色透明、有色透明' 或半透 明）的樹脂所成之層。作爲上述樹脂，例如可合適地使用 -27- 200900746 與上述樹脂材料所含有的樹脂成分同樣者。基材層 係沒有特別的限定，較佳爲〇.〇3〜〇.3mm，更佳爲 0.2mm ° [4-2]防眩層： 防眩層只要是在上述基材層的至少一面上所形 上述防眩膜用粒子組成物所成的層狀者，其厚度等 特別的限制，但較佳爲其厚度係〇. 〇 〇 5〜0.1 m m， 0-008〜0.08mm。防眩層的厚度若低於〇.〇〇5mm， 不到充分的防眩性之虞。另一方面，若超過0 · 1 mm 全光線透射率會降低之虞。 本發明的防眩膜，例如可藉由將上述的防眩膜 組成物溶解在有機溶劑中以得到漿體狀的漿體，藉 周知的捏合機將該漿體塗佈到基材層的面上，使成 所欲的厚度後，進行乾燥而製造。 作爲上述有機溶劑，例如可舉出水、甲苯、環 環己酮、甲基異丁基酮（MIBK)、甲基乙基酮（ 、N-甲基-2-吡咯啶酮（NMP )等。再者，此等可爲 種或組合二種以上來使用。 有機溶劑的比例，對於1 0 0質量份的防眩膜用 成物之固體成分而言，較佳爲10〜2000質量份， 20〜1000質量份。 〔實施例〕 的厚度 0.05 〜 成的由 係沒有 更佳係 則有得 ，則有 用粒子 由眾所 爲上述 己烷、 MEK ) 單獨一 粒子組 更佳爲 -28- 200900746 以下’以實施例爲基礎來具體說明本 不受此等實施例所限定。再者，實施例、 」及「％」，只要沒有特別預先指明，則 又，以下顯示各種物性値的測定方法及諸 [平均粒徑]: 平均粒徑係使用日本電子公司製的掃 (商品名「JSM-6030LA」），以5〇〇〇倍 影倍率，進行防眩膜用粒子的觀察，對任 粒子進行影像解析而測定。 [正反射光強度]: 將防眩膜用粒子組成物塗佈在基材層 製作厚度1 0 μηι的薄膜狀之光學材料成形 爲「薄膜」），對此薄膜，使用村上色彩 計，測定入射角2 0。的正反射光強度。測 的正反射光強度當作1 0 0來換算，評價係 行。 [防眩性的目視評價] 與上述[正反射光強度]之評價同樣地 光學材料成形品。對此薄膜，進行螢光燈 眼）狀態的評價。以目視來進行此評價的 發明，惟本發明 比較例中的「份 以質量爲基準。 特性的評價方法 描型電子顯微鏡 或1 0 0 0 0倍的攝 意1 0個的上述 上，使乾燥，以 品（以下亦記載 公製的變角光度 定値係以標準板 藉由換算値來進 ’製作薄膜狀的 的光之映入（耀 確認。評價基準 • 29 - 200900746 係如以下地進行。 ◎:幾乎沒有耀眼 〇：耀眼少 △:有耀眼 x:耀眼大 [霧度（％)] 與上述[正反射光強度]之評價同樣地，製作薄膜狀@ 光學材料成形品。對此薄膜（光學材料成形品），使用 SUGA試驗機公司製的霧度計，根據jIS K7105，測定_ 度（％ )。 [白濁感的目視評價] 與上述[正反射光強度]的評價同樣地，製作薄膜狀的 光學材料成形品。對此薄膜（光學材料成形品），以通過 薄膜來觀看登光燈時，螢光燈的輪廓之鮮明度來目視評價 白濁感。評價基準係如以下地進行。 ◎:輪廓鮮明 〇：輪廓稍微鮮明 △:輪廓稍微模糊不清 x :輪廓模糊不清 [全光線透射率]: 與上述[正反射光強度]的評價同樣地，製作薄膜狀的 -30- 200900746 光學材料成形品。對此薄膜（光學材料成形品），使用 SUGA試驗機公司製的霧度計，根據JIS Κ71〇5，以沒有 將試料固定的狀態（即空氣的全光線透射率）當作1 〇 〇 % 進ί了測定。 (實施例1 ) [防眩膜用粒子的合成]: 首先，藉由乳化聚合來製造單分散粒子。具體地，藉 由使用過硫酸鉀當作水溶性引發劑來乳化聚合90份的苯 乙烯、10份的甲基丙烯酸，製作從苯乙烯而來的構造單位 (表1中以「ST構造單位」表示）與從甲基丙烯酸而來 的構造單位（表1中以「甲基丙烯酸構造單位」表示）的 組成比（質量比）爲9 0 : 1 0的平均粒徑1 · 0 μιη之單分散粒 子。 其次，將2份的3,5,5-三甲基己醯基過氧化物（商品 名「Peroyl 355」、日本油脂公司製，水溶解度：0.01%) 、〇 · 1份的月桂基硫酸鈉、及2 0份的水攪拌而乳化後，更 以超音波均化器（MIZUHO工業公司製）進行微粒子化， 得到水性分散體。於所得到的水性分散體中，添加1 5份 的上述單分散粒子，攪拌16小時。攪拌後，添加9 5份的 苯乙烯（ST) 、5份的二乙烯基苯（DVB)，在40°C徐徐 攪拌3小時，使單分散粒子吸收苯乙烯及二乙烯基苯。然 後，藉由升溫到7 5 °C，進行3小時的聚合反應，而得到含 有由第一聚合物所成的（a )芯粒子之乳液。再者，（a ) -31 - 200900746 芯粒子的平均粒徑爲2.0 μ m，凝固物係幾乎沒有發生。又 ，第一聚合物含有：94.3質量％的當作（al )芳香族乙烯 系單體單位之從苯乙烯而來的構造單位，1.4質量％的當 作（a2 )含極性官能基的單體單位之從甲基丙烯酸而來的 構造單位、及4.3質量％的當作（a3 )多官能單體單位之 從二乙烯基苯而來的構造單位，（a4)其它單體單位爲〇 質量％，即不含有（a4 )其它單體單位。 接著，混合22.1份的與前述水性分散體同一的水性 分散體、及4 0份（但是當作固體成分）的上述含有（a ) 芯粒子（種子聚合物粒子）的乳液，攪拌16小時。攪拌 後，添加8份的甲基丙烯酸甲酯（MMA ) 、2份的三羥甲 基丙烷三甲基丙烯酸酯（TMPMA ) ’在40°C徐徐攪拌1 小時，使（a )芯粒子吸收甲基丙烯酸甲酯及三羥甲基丙 烷三甲基丙烯酸酯。然後，藉由升溫到7 5 °C，進行3小時 的聚合反應，形成被覆於（a)芯粒子的表面之由第二聚 合物所成的（b )殼層。如此地，得到含有由（a )芯粒子 與（b )殼層所成的防眩膜用粒子（以下亦記載爲「粒子 (A )」）之乳液。乳液中的粒子（A )爲芯殼構··造，其 平均粒徑約2.2 μ m，凝固物幾乎沒有發生。再者，（b ) 殼層的厚度係由粒子（A )的平均粒徑與（a )芯粒子的平 均粒徑之差來算出，爲0.2μιη。又，第一聚合物含有：80 質量％的當作（b2)(甲基）丙烯酸酯單體單位之從甲基 丙烯酸甲酯而來的構造單位、及20質量％的當作（b3 )多 官能單體單位之從三羥甲基丙烷三甲基丙烯酸酯而來的構 -32- 200900746 造單位’ （Μ)芳香族乙烯系單體單位及（b4)其它構造 單k爲0質里。/β’不含有（bl)芳香族乙烯系單體單位及 (a4)其它單體單位。 (實施例2〜4、比較例i〜4 ) 除了成爲表1所示之摻合處方以外，與實施例1同樣 地’得到含有防眩膜用粒子（粒子（B )〜（H ))的乳液 。表1中顯示各種物性値。再者，比較例1〜3係不使用 第一聚合物而進行合成。 -33- 200900746 〔表1〕 摻合處方(份） 實施例 比較例 1 2 3 4 1 2 3 4 ⑻芯粒子 (第一聚合物)的形成 種子聚合物 粒子 ST構造單位 (質量比） 90 90 90 90 - - - 90 甲基丙烯酸構造單位 (質量比） 10 10 10 10 - - - 10 摻合量 15 15 15 15 - _ _ 15 ST 95 95 95 95 _ _ 95 DVB 5 5 5 5 - _ 5 (b)殼層的形成 第一聚合物 40 12 40 12 . _ 2.2 ST _ 3 3 _ 30 80 DVB _ _ 2 2 • 20 20 _ MMA 8 8 5 5 80 50 _ 80 TMPMA 2 2 . 一 20 20 粒子 ㈧ (B) (C) (D) (E) (F) ⑹ (H) (a)芯粒子的直徑 (μιη) 2.0 2.0 2.0 2.0 0 0 0 0.7 (b)殼層的厚度 0.2 0.6 0.2 0.6 0 0 0 2.3 全體粒徑 2.2 2.6 2.2 2.6 2.3 2.4 2.3 3.0 構造單位 (Mm%) (al) 94.3 94.3 94.3 94.3 0 0 0 94.3 (a2) 1.4 1.4 1.4 1.4 0 0 0 1.4 (a3) 4.3 4.3 4.3 4.3 0 0 0 4.3 (a4) 0 0 0 0 0 0 0 0 (bl) 0 0 30 30 0 30 80 0 (b2) 80 80 20 20 80 20 20 80 (b3) 20 20 50 50 20 50 0 20 (b4) 0 0 0 0 0 0 0 0 -34- 200900746 (實施例5 ) [防眩膜用粒子組成物的調製，及光學材料成形品的 製作]: 首先，使用噴霧乾燥機（型號「B-290型」，日本 BUCHI公司製）’對實施例1所得之含粒子（A )的乳液 進行乾燥，得到粉末狀的粒子（A )。然後，混合丨00份 的二季戊四醇五丙烯酸醋與二季戊四醇六丙烯酸酯的混合 物（表2中以「DPHA」表示（商品名「Ar〇nix M402」， 東亞合成公司製）、及100份的有機溶劑（甲苯/環己酮 =9 /1 )’得到混合液。對所得到的混合液，添加1 〇份的 上述粉末狀的粒子（A )及使分散’以調製防眩膜用粒子 組成物。 其次’以美亞桿將所得到的防眩膜用粒子組成物，塗 佈在厚度0.2mm的聚對苯二酸乙二酯（PET)製之基材（ 基材層）上。此時，調整防眩膜用粒子組成物的塗佈量， 以使塗佈層（防眩層）之乾燥後的厚度成爲1 〇 μιη ( 0.01mm)。乾燥後’藉由高壓水銀燈照射5 00mJ/cm2的紫 外線’以使塗佈層硬化’而製作光學材料成型品（防眩膜 )° 對所製作的光學材料成型品（防眩膜）進行上述各種 評價。評價結果：正反射光強度爲7 8，防眩性的目視評價 爲〇，霧度爲3 _ 5 % ’白濁感的目視評價爲◎，全光線透射 率爲93_3%。再者’上述pet製的基材之霧度爲2.8%， 全光線透射率爲8 7.3 %。 -35- 200900746 (實施例6〜8、比較例5〜8 ) 除了成爲表2所示的摻合處方以外，與實施例5胃_ 地，調製防眩膜用粒子組成物。然後，使用所調製的防目玄 膜用粒子組成物，與實施例5同樣地，製作光學材料成刑 品（防眩膜），進行上述各種評價。表2中顯示評價纟吉果 〔表2〕 慘合處方(份） 防眩性 白濁感 DPHA 溶劑 ί 立子 正反射光強度 (以標準板的値當作 目視 霧度 '------— 目視 土兀喊 透射率 種類 摻合量 100來校正） 評價 (%) 評價 (%) 貫施例5 100 100 (Α) 10 78 〇 3.5 ◎ m ^ 實施例6 100 100 (Β) 10 89 〇 5.4 ◎ QA Ί 實施例7 100 100 (C) 10 37 ◎ 26.2 △ Q9 ο 實施例8 100 100 旦 10 39_ ◎ 25.3 Δ 96.5 比較例5 100 100 (Ε) 10 122 X 2.3 ◎ 比較例6 100 100 (F) 10 56 〇 24.9 △ J^ cn 1 比較例7 100 100 (G) 10 30 ◎ 49.5 X QA 比較例8 100 100 (Η) 10 120 X 2.8 ◎ -7H-.0 Q9 0 基材“ - - - - - 2.8 87.3 氺 1 : PET (厚度：200μιη) 如表2所示地，使用實施例丨〜4的防眩膜用粒子所 製作的實施例5〜8之光學材料成型品（防眩膜），與使 用比較例1〜4的防眩膜用粒子所製作的比較例5〜8之光 學材料成型品（防眩膜）比較下，確認防眩性與白濁感（ -36- 200900746 透射性）的平衡爲非常優異。茲認爲此係因爲（a)芯粒 子的反射光干涉（b)殼層的反射光。 產業上的利用可能性 本發明的防眩膜用粒子，藉由使含於光學材料成形品 中’可得到具有優異的防眩性，同時防眩性與白濁感（透 射性）之平衡非常優異的光學材料成形品，故具體地適合 含於防眩薄膜（防眩膜）、光擴散薄膜、光擴散板、偏光 板、或導光板中，尤其含於防眩膜中。 【圖式簡單說明】 第1圖係顯示本發明的防眩膜用粒子之一實施形態的 截面圖，爲顯不入射光與反射光的光路之說明圖。 【主要元件符號說明】 1 1 :殻層 1 2 :芯粒子 d =殼層的厚度 N :入射光 H-1、H-2 :反射光 -37-。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 A particle for an anti-glare film of an optical material molded article having excellent glare properties and an anti-glare property and a white turbidity (transmissivity), and a particle composition for an anti-glare film containing the particles for the anti-glare film. [Prior Art] Currently, liquid crystal display devices are being used as display devices for televisions, personal computers, and the like. In the case where the transmitted light or the reflected light is improperly diffused on the surface thereof, the liquid crystal display device looks very dazzling when viewed from the front or is reflected by the light from the surrounding environment such as a fluorescent lamp, and has an image. It is a problem such as "so-called "bright"). An anti-glare film (anti-glare film) is usually provided on the surface of the liquid crystal display device for the purpose of preventing the above problems. As the antiglare film, a film or the like containing particles made of a synthetic resin is disclosed (for example, see Patent Document 1). In the film described in Patent Document 1, the thickness of the binder layer is set to a predetermined ratio without reducing the transmittance, but the anti-glare property is exhibited by the number average particle diameter of the particles contained in the film. In addition, it has been reported that a composite particle having a core-shell structure composed of a core portion and a shell portion is used, and a shell portion of a plurality of composite particles is bonded to each other to form a film-shaped optical film (see, for example, Patent Document 2). [Patent Document 1] Japanese Laid-Open Patent Publication No. Hei No. Hei. No. Hei. There is room for improvement in terms of anti-glare property, and it is desired to develop an optical material molded article (anti-glare film) which is excellent in the balance between anti-glare property and white turbidity (transmissibility), and to manufacture such an optical material molded article. (Anti-glare film) material. Further, the optical film of Patent Document 2 has an advantage that the core portion is in a state of high-density dispersion. However, there is room for improvement in terms of anti-glare property, and in terms of balance between anti-glare property and white turbidity (transmissibility). There is also room for improvement. In view of the problems of the prior art, the present invention provides an optical excellent in anti-glare property and excellent in balance between anti-glare property and white turbidity (transparency) by being contained in an optical material molded article. The particles for an anti-glare film of the material molded article and the particle composition for an anti-glare film containing the particles for the anti-glare film. The inventors of the present invention have conducted intensive review in order to solve the above problems, and as a result, it has been found that the above problems can be solved by the particles having the shell layer having a predetermined thickness and the composition containing the above particles, and finally the present invention has been completed. Specifically, the present invention provides the following particles for an anti-glare film and a particle composition for an anti-glare film. [1] A particle for an anti-glare film comprising: (a) a core particle formed of a first polymer; and (b) a shell layer coated on a surface of the (a) core particle-6 - 200900746 At least a part of which has a thickness of 0. The range of 1~2·〇μιη is determined by the second polymer; the average particle diameter is 0·8~10^m. [2] The particles for an anti-glare film according to the above [1], wherein the refractive index of the above-mentioned compound is different from the refractive index of the second polymer. [3] The particles for an anti-glare film according to the above [1], wherein at least one of the monomer units contained in the above-mentioned compound is different from the monomer unit contained in the second substance. [4] The particle for an anti-glare film according to the above [1], wherein the compound contains (al) 20 to 98% by mass of an aromatic vinyl monomer, and (a2) 0 to 40% by mass of a polar group. a monomer unit of a functional group, 0 to 40% by mass of a polyfunctional monomer unit, and (a4) 0 to 10% of other monomer units (however, (al) + ( a2 ) + ( a3 )- ) =1 0 0 mass %). [5] The particle for an anti-glare film according to the above [1], wherein the compound contains: (b1) 0 to 90% by mass of an aromatic vinyl monomer, and (b2) 10 to 100% by mass (A) Acrylate monomer single (b3) 0 to 40% by mass of polyfunctional monomer units, and (b4) 0 to % by weight of other monomer units, (but, (bl) + (b2) + (b3) b4 ) = 1〇〇% by mass). [6] The particles for an anti-glare film according to the above [1], wherein the core particles are used as seed polymer particles, and the front b) shell layer is formed by seed polymerization. [7] A particle composition for an antiglare film comprising: (A) particles for preventing an antiglare film and (B) a binder component. Inside, a poly-polymerization unit (a3 r%% - (a4 dimerization unit, 10 mass 丨 + (described (Π) -7- 200900746 [8] - anti-glare film particle composition The production method includes the emulsion removing solvent of the anti-glare film particles according to the above [1], the step of drying the anti-glare film particles, and the anti-glare film particles and the binder component obtained by mixing. [9] An optical material molded article is a resin material containing a resin component and the particles for an anti-glare film according to [1]. [1] An optical material molded article described in [9]. It is an anti-glare, light-diffusing film, light-diffusing sheet, polarizing plate, or light guide plate. [11] An anti-glare film comprising: a substrate layer; and an anti-glare layer formed on at least one side of the substrate layer And the anti-glare particle composition described in the above [7]. The particle for anti-glare film of the present invention has excellent anti-glare property and anti-glare by being made into an optical material. Effect of optical material molded article excellent in balance between sex and white (transmissivity) The particle composition for a glare film achieves an effect of obtaining an optical material molded article having excellent balance between anti-glare property and white turbidity (transparency) when the anti-glare phenomenon is obtained. The anti-glare film according to the present invention is used. In the method for producing a particle composition, it is possible to produce an anti-glare film composition which is excellent in the balance between the anti-glare property and the anti-glare property and the white turbidity transmittance. The material molded article and the anti-glare film of the present invention have excellent anti-glare properties, and have excellent effects of anti-glare property and white turbidity (transmission property). From the inclusion to the dry process Nr% The shape of the film is excellent in the feeling of turbidity. The achievable feeling is achieved by the granules. (Embodiment) BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out the invention will be described below, but the present invention does not The following embodiments are defined, and the following embodiments are appropriately modified and modified based on the general knowledge of those skilled in the art without departing from the spirit of the invention. It is understood that it is within the scope of the present invention. [1] Particles for an anti-glare film: The particle for anti-glare film of the present invention includes (a) a core particle formed of a first polymer, and is coated with the above (a) The thickness of at least one portion of the surface of the core particle is at 0. 1~2. The (b) shell layer formed of the second polymer in the range of 0 μηι, and having an average particle diameter of 0·8 ιομπι. By containing such particles, an optical material molded article having excellent antiglare properties and excellent balance between antiglare property and white turbidity (transmissibility) can be obtained. This will be explained in detail below. [1 -1] (a) Core particle·_ The (a) core particle constituting the particle for an anti-glare film of the present invention is formed of a first polymer. Specifically, a styrene-based polymer such as a styrene-based polymer or a styrene-butadiene copolymer, or an acrylate-based polymer or the like can be given. The weight average molecular weight of the first polymer is preferably 100,000 or more, more preferably -9 - 200900746, more preferably 200,000 or more, and particularly preferably 500,000 or more. When the weight average molecular weight is less than 1,000,000, when the second polymer is polymerized, since the second polymer is immersed in the first polymer, it may not be a clear core-shell structure. Here, the "weight average molecular weight" in the present specification means a ruthenium measured by a gel permeation chromatography (GPC) method using polystyrene as a standard substance. (a) The average particle diameter of the core particles is preferably 0. 3~4. 0 μιη, more preferably 0. 5~2·0μιη, especially good for 〇. 8~1·5μιη. The above average particle diameter is less than 0. 3 μ m ' has insufficient light diffusibility. On the other hand, if it is 4. When it is 0 μιη or more, the stability of polymerization is deteriorated. Further, the average particle diameter of the (a) core particles refers to the measurement of the SEM photograph by the particles for the anti-glare film of the present invention. Specifically, for the SEM photograph of at least 10 particles for the anti-glare film, (a) the longest diameter of the core particles ((a) the longest diameter of the core particles), and (a) the average diameter of the longest diameter of the core particles The "(a) average particle diameter of the core particles". The first polymer preferably contains (a) an aromatic vinyl monomer unit (hereinafter also referred to as "constituting unit (a 1 )")) and (a2) a polar functional group-containing monomer unit (in a predetermined ratio). The following are also described as "constituting unit (a2)"), (a3) polyfunctional monomer units (hereinafter also referred to as "constituting unit (a3)"), and (a4) other monomer units (hereinafter also referred to as "composition" Unit (a4)"). [1-1-1] (al) Aromatic vinyl monomer unit··-10-200900746 The aromatic vinyl monomer used as the constituent unit (al) may, for example, be styrene or α-methylstyrene. , vinyl toluene, p-methyl benzene, 2-methyl styrene, 3-methyl styrene ' 4 -methyl styrene, 4- styrene, 4-tert-butyl styrene, 3, 4 - dimethyl styrene, 4-oxystyrene, 4-ethoxystyrene, 2-chlorostyrene, 3-chlorophenylethyl, 4-chlorostyrene, 2,4-dichlorostyrene, 2 , 6-dichlorostyrene, chloro-3-methylstyrene, 1-vinylnaphthalene, 2-vinylpyridine, 4-vinylpyridine, and the like. Among these, styrene and α-methylstyrene are preferable. The aromatic vinyl monomer may be used alone or in combination of two or more. The ratio of the above-mentioned constituent unit (a 1 ) is preferably 20 to 98 in terms of the constituent unit (a 1 ), the constituent unit (a2), the constituent unit (a3), and the constituent unit (a4) as 100% by mass. The mass% is more preferably -95 mass%, and particularly preferably 40 to 90 mass%. When the ratio of the constituent unit (al) of the first polymer is less than 20% by mass, the difference in refractive index between the core particle and the shell becomes small, and in the optical material molded article containing the core-shell structure, there is no possibility Shows good anti-glare function. On the other hand, if it exceeds 98% by mass, the polymerization stability is deteriorated. [1 -1 -2] (a2) Monomer unit containing a polar functional group: A monomer having a polar functional group constituting the constituent unit (a2), and a monomer having a polar functional group in its molecule. As the polar functional group, a carboxyl group, a cyano group, a hydroxyl group, a glycidyl group, an ester group or the like can be given as a compound. Among these, from the viewpoint of contributing to the stability of polymerization, the layer system of 25 which is more than the ethylidene 4-group is suitable for having a carboxyl group or a hydroxyl group. monomer. Further, the monomers exemplified below may be used singly or in combination of two or more. Examples of the monomer having a carboxyl group include (meth)acrylic acid, crotonic acid, cinnamic acid, maleic acid, maleic anhydride, fumaric acid, itaconic acid, itaconic anhydride, and monomethyl maleate. a carboxyl group-containing unsaturated monomer such as monoethyl maleate, monomethyl ikonate, monoethyl ikonate or mono-2-(meth) propyleneoxyethyl hexahydrophthalate, And its anhydrides and so on. Among these, (meth)acrylic acid is preferred. Examples of the monomer having a cyano group include a vinyl cyanide monomer such as (meth)acrylonitrile, crotononitrile or cinnamic acid nitrile; 2-cyanoethyl (meth) acrylate and 2-cyano Propyl (meth) acrylate, 3-cyanopropyl (meth) acrylate, and the like. Among these, (meth)acrylonitrile is preferred. Examples of the monomer having a hydroxyl group include hydroxymethyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 6-hydroxyhexyl (meth) acrylate, and (meth) acrylate 4 - a mono(meth)acrylate hydroxy(cyclo)alkane such as hydroxycyclohexyl ester or neopentyl glycol mono(meth)acrylate; (methyl)propionic acid 3-chloro-2-propyl propylate, A methyl (meth)acrylic acid-substituted hydroxy (cyclo) alkyl ester such as 3-aminopropyl-2-hydroxypropyl ester. Among them, '(meth)acrylic acid is preferably methyl vinegar. Examples of the monomer having a glycidyl group include allyl glycidyl ether, glycidyl (meth)acrylate, methyl glycidyl methacrylate, and cyclohexyl (meth)acrylate. . Among these, '(meth)acrylic acid glycidol vinegar is preferred. -12- 200900746 The monomer having an ester group is exemplified by methyl (meth) acrylate, (meth) propylene vinegar, (meth) propyl propyl acrylate, (methyl) (meth) acrylate (cyclo)alkane such as n-hexyl acrylate, 2-ethylhexyl (meth) acrylate, cyclohexyl (meth) acrylate; 2-methoxyethyl (meth) acrylate (meth)acrylate alkoxy (cyclo)alkane such as p-methoxycyclohexyl (meth)acrylate; polyvalent (methyl) such as trimethylolpropane tri(meth)acrylate; Acrylates; vinyl esters such as vinyl acetate, vinyl propionate, versatic vinyl acetate, and the like. Among these, the ratio of the above-mentioned constituent unit (a2) of methyl (meth) acrylate is preferably expressed in units (a 1 ), constituent units (a2), constituent units (a3), and constituent units. When the total of (a4) is 1% by mass, it is preferably 〇~40% by mass, more preferably 2 to 40% by mass, particularly preferably 4 to 35% by mass, most preferably 8 to 30% by mass. . When the ratio of the constituent unit (a2) contained in the first polymer is less than 2% by mass, the polymerization stability is deteriorated. On the other hand, if it exceeds 40% by mass, the polymerization stability is deteriorated. [1-1-3] (a3) Multifunctional monomer unit: The polyfunctional monomer used for the constituent unit (a3) may, for example, be a multivalent conjugated vinyl compound represented by divinylbenzene or a multivalent valence represented by trimethylolpropane trimethacrylate (TMPMA). A monomer having at least two or more copolymerizable double bonds such as an acrylate compound is considered as a suitable example. -13- 200900746 Further, as the polyvalent acrylate compound, a dipropylene trimethylolpropane triglyceride such as diol diacrylate, 1,3-butanediol diacrylate, acrylate or polypropylene glycol diacrylate Acrylate, tetramethylol methane triacrylate, ethylene glycol dimethacrylate, diacrylate, triethylene glycol dimethacrylate, polyvinyl acetate, 1,3-butanediol II Dimethacrylate, trimethylol enoate, trimethylol B, such as methacrylate, 1,4-acrylate, 1,6-hexanediol dimethacrylate, new acrylate An ester such as an alkyl trimethacrylate or the like. Among the above polyfunctional monomers, ethylene glycol dimethacrylate and trimethylolpropane trimethyl are exemplified as suitable examples. Further, among these, from the viewpoint of polymerization, it is preferably divinylbenzene or trimethylolpropane, and the monomers may be a single one or a combination of two of the above constituent units (a3). The ratio is preferably 〇40 to 40 mass when the constituent unit (a2), the constituent unit (a3), and the total composition are regarded as 100% by mass. 3 5 mass%, particularly preferably 1 〇 to 2 0 mass%. If the ratio of the first polymerization unit (a 3 ) exceeds 40% by mass, the difference is caused. [1-1-4] (a4) Other monomer units: Ethylene glycol dimethyl glycol dimethyl propylene dichloride such as polyethyl 1,6-hexanediol diester compound or acrylate Qualitative viewpoints such as alcohol dimethyl pentanediol dimethyl propane trimethyl propyl trimethacrylate divinyl benzene, acrylate, and the like. Use above. Unit (a 1 ), unit (a4) /〇, more preferably 5~ The stability of the composition contained in the substance varies -14-200900746 The stomach may also contain copolymers with the above various monomers. Other monomer units of n it m $. Examples of the other monomer constituting the constituent unit (a4) include hydrazine-hydroxyl groups such as N-hydroxymethyl (meth) acrylamide and ν, ν-di-methyl (meth) acrylamide. Methylated unsaturated carboxylic acid oxime oxime; 2-;! aminoaminoethyl acrylamide amine-containing amino group-containing acrylamide; (meth) acrylamide, Ν-methoxy Alkylamine or quinone imine of an unsaturated carboxylic acid such as hydrazine, hydrazine-extended ethyl bis(methyl) acrylamide, maleic acid maleate or maleimide Ν_Methyl acrylamide, hydrazine, hydrazine-dimethyl methacrylate, etc. 单 monoalkyl (meth) acrylamide, hydrazine, hydrazine-dialkyl acrylamide; 2- Amine-containing (meth) acrylates such as methylaminoethyl (meth) acrylate; amines such as 2-(dimethylaminoethoxy)ethyl (meth) acrylate (meth) acrylates of alkyl alkoxyalkyl groups; halogenated vinyl compounds of vinyl chloride, vinylidene chloride, fatty acid vinyl esters, etc.; 1,3 - butadiene, 2-methyl-1,3- Butadiene, 2-chloro-1,3-butadiene, 2,3-dimethyl-1, A conjugated diene compound such as 3-butadiene or the like. Further, these monomers may be used alone or in combination of two or more. [1-2] (b) Shell layer: The (b) shell layer constituting the particles for the anti-glare film of the present invention is coated on at least a part of the surface of the (a) core particle, and has a thickness of 0. Within the range of 1 to 2·〇μιη, it is made of the first polymer. By (b) the shell layer, the light incident on the optical material molded article containing the antiglare film or the like of the particle for an anti-glare film of the present invention is attached to the (b) shell layer or the (a) core particle- 15- 200900746 The surface of the reflection is reflected, and the reflected light reflected by the (b) shell layer is phase-diffused with the reflected light system that penetrates the (b) shell layer and is reflected by the surface of the (a) core particle. . Therefore, since the reflected light having the specified wavelength is offset by the mutual offset, that is, since the reflected light reflected on the surface of the (a) core particle is reflected by the surface of the (b) shell layer to interfere with the reflected light, the present invention is contained. The optical material molded article of the particle for an anti-glare film is advantageous in that it has excellent anti-glare properties. Further, it is also advantageous in that the balance between the anti-glare property and the white turbidity (transmissibility) is extremely excellent. Specifically, as shown in Fig. 1, when the thickness of the (b) shell layer satisfies the formula: d = { ( 1/4 ) χ λ} + { ( 1/2 ) η χ λ} (however, n is an integer) The entrance pupil of the wavelength λ is offset by its reflected pupil. More specifically, for an entrance pupil having a wavelength of 600 nm, if the thickness d of the (b) shell layer is 0_15 μm (150 ηηη) (n = 〇 in the above formula), the reflection reflected in the (b) shell layer 11 The light H-1 and the reflected light H-2 which penetrates the (b) shell layer 11 and are reflected on the surface of the (a) core particle 12, a phase difference of (1 /2 ) λ occurs. Therefore, the incident pupil of the wavelength of 600 nm can be attenuated by the particles for the anti-glare film. (b) The thickness of the shell layer is at 0. 1~2. The range of Ομηι is preferably at 0. 2~1. The range of 5 μιη, more preferably at 0. 2~1. The range of 0 μηι. The above thickness is lower than Ο. Ίμηι, because the shell layer is too thin, it is easy to occur where there is no shell layer. On the other hand, if it exceeds 2·0 μη, light is attenuated before reaching the core-shell interface, and there is a possibility that the effect of the dryness cannot be obtained by reflection from the core-shell interface. In addition, (b) the thickness of the shell layer is measured by image analysis of the SEM photograph of the particles for the anti-glare film of the present invention. -16- 200900746 Specifically, in the SEM photograph of the particles for the antiglare film, the longest diameter (the longest diameter of the entire particles) of the particles is measured by a method described later. Thus, after the longest diameter of all the particles, the longest diameter of the first polymer (core particles) (the longest diameter of the core particles) is subtracted, and the obtained ruthenium is calculated as the thickness of the shell layer, and at least 10 defenses are obtained. The glare film was calculated using particles, and their average enthalpy was regarded as "(b) thickness of the shell layer". The weight average molecular weight of the second polymer is preferably 50,000 or more, more preferably 100,000 or more, and particularly preferably 200,000 or more. When the weight average molecular weight is less than 1,000,000, the heat-resistant property and solvent resistance of the produced optical material molded article may be insufficient. The second polymer preferably contains (b 1 ) aromatic ethyl monomer units (hereinafter also referred to as "constituting units (bl)") and (b2) (meth) acrylate monomer units in a specified ratio. (hereinafter also referred to as "constitutive unit (b2)"), (b3) polyfunctional monomer units (hereinafter also referred to as "constituting unit (b3)"), and (b4) other monomer units (hereinafter also referred to as " The constituent unit (b4)"). The (bl) aromatic vinyl monomer unit can be suitably used in the same manner as the above (al) aromatic vinyl monomer unit. When the ratio of the constituent unit (b1) is 1% by mass in terms of the total of the constituent unit (b1), the constituent unit (b2), the constituent unit (b3), and the constituent unit (b4), it is preferably It is 0 to 90% by mass, more preferably 〇~8〇% by mass, and particularly preferably 0 to 70% by mass. When the ratio of the constituent unit (b 1 ) contained in the second polymer exceeds 90% by mass, the difference in refractive index between the core particle and the shell layer becomes small, and in the optical material molded article containing the core-shell structure. There is no good anti-glare function that can show good -17-200900746. Examples of the (meth) acrylate monomer used for the constituent unit (b2) include decyl methacrylate (MMA), ethyl (meth) acrylate, propyl (meth) acrylate, and (methyl). a (meth)acrylic (cyclo)alkyl ester such as n-hexyl acrylate, 2-ethylhexyl (meth)acrylate or cyclohexyl (meth)acrylate; 2-methoxy B (meth)acrylate (meth)acrylate alkoxy (cyclo)alkane such as ester, p-methoxycyclohexyl (meth)acrylate; polyvalent (methyl) such as trimethylolpropane tri(meth)acrylate Acrylates; vinyl esters such as vinyl acetate, vinyl propionate, vinyl vinyl acetate, and the like. Among these, methyl methacrylate is preferred. The refractive index of the first polymer is different from the refractive index of the second polymer. Here, if the above constituent unit (b2) is contained, the refractive index of the (b) shell layer (second polymer) is lowered as compared with the (a) core particle (first polymer). Thus, in comparison with the (a) core particle, if the refractive index of the (b) shell layer is lowered, the interface between the core particle and the shell layer generates different composition interfaces for reflecting light, and the reflected light and shell of the different composition interfaces The reflected light from the layer shell will dry up, which has the advantage of reducing the intensity of the reflected light. That is, in the obtained optical material molded article, a good anti-glare function is exhibited. Further, the refractive indices of the '(a) core particles and (b) shell layer are as follows. First, each polymer composed of each monomer unit contained in the first polymer and the second polymer is synthesized, and each of the synthesized polymers is applied onto a substrate and dried at 70 ° C. A film having a thickness of 1 μm was formed in 2 minutes. Then, the refractive index of the formed film of -18-200900746 was measured by an Abbe refractometer. The refractive index (refractive index of the film) of each of the above-mentioned polymers measured was calculated from the respective mixing ratios of the respective monomers constituting each monomer unit in the first polymer and the second polymer. For example, the refractive index of the first polymer ((a) core particle) can be measured as follows. First, a polymer obtained by separately polymerizing (a) an aromatic vinyl monomer (hereinafter also referred to as "(al) polymer"), (a2) a monomer having a polar functional group is polymerized separately. The obtained polymer (hereinafter also referred to as "a2) polymer") and (a3) a polymer obtained by polymerizing a polyfunctional monomer alone (hereinafter also referred to as "(a3) polymer"). Then, these (a 1 ) to (a3) polymers were respectively applied onto a substrate, and dried at 70 ° C for 2 minutes to prepare a polymer of (ai) to (a3) having a thickness of ΙΟμπι. (al) ~ (a3) film. The respective refractive indices X, Y, and Z were measured for each of the produced (a 1 ) to (a3) films by an Abbe refractometer. Then, the respective refractive indices X, Y, and Z, and the mixing ratios X, y, and z of the respective monomers (ai) to (a3) used in the production of the first polymer were calculated according to the following formula. Formula: {Xx(x/100)} + {Yx(y/100)}+{Zx(z/100)} (b3) the polyfunctional monomer unit, and (b4) other monomer units are preferably the same The ratio is appropriately the same as that of the above (a3) polyfunctional monomer unit and (a4) other monomer unit. The average particle diameter of the particles for an anti-glare film of the present invention is 〇. 8~1 〇 μιη, preferably 〜8·0μηι, more preferably 2. 0~5·0μηι. The above average particle size is lower than 〇. When 8 μιη ‘, sufficient light scattering is not obtained, and the performance of the anti-glare property is insufficient. On the other hand, when it is 10 μηη or more, since the particles for the anti-glare film obtained in -19-200900746 are too large, the particles may not be trapped in the optical material molded article (especially the film). Further, the average particle diameter of the particles for the anti-glare film is measured by analyzing the image of the SEM photograph. Specifically, the longest diameter (the longest diameter of all the particles) of the particles for the anti-glare film is measured for each of the SEM photographs of the particles for the anti-glare film, and the average diameter of the longest diameter of the entire particles is used as the "anti-glare film". The average particle size of the particles." In the particles for an anti-glare film of the present invention, the composition of the first polymer and the composition of the second polymer may be the same or different, but it is preferred that at least one of the monomer units contained in the first polymer is different from The monomer unit contained in the second polymer. In other words, at least one of the monomer units constituting the particles for the anti-glare film is contained only in the polymer of the first polymer and the second polymer. In this way, particles having a difference in refractive index inside can be obtained. That is, different composition interfaces can be formed inside the particles. [1 - 3] Method for producing particles for an anti-glare film: The particles for an anti-glare film of the present invention can be formed, for example, by seed polymerization of (a) core particles as seed polymer particles, and (b) a shell layer. Specifically, it can be manufactured in accordance with the method shown below. First, (a) the core particles can be obtained by a general emulsification polymerization method using an aqueous medium. This "aqueous medium" means a medium containing water as a main component. Specifically, the content of water in the aqueous medium is preferably 40% by mass or more, and more preferably 50% by mass or more. Examples of other media which can be used for the hydrazine include compounds such as esters, ketones, phenols, and alcohols. -20- 200900746 The conditions of the emulsion polymerization can be in accordance with well-known methods. For example, when the total amount of the monomers used is 1 part by mass, 100 to 500 parts by mass of water is usually used, and the polymerization temperature is -10 to 100 ° C (preferably -5 to 100 ° C, more). Good 0~9 0 °c), polymerization time 0. It is carried out under conditions of 1 to 30 hours (preferably 2 to 2 5 hours). As a method of emulsion polymerization, a batch method in which a monomer is put into one, a method in which a monomer is divided or continuously supplied, a method in which a pre-emulsion of a monomer is divided or continuously added, or a method may be employed. The way of combining the stages, etc. Further, one or two or more kinds of molecular weight modifiers, chelating agents, inorganic electrolytes and the like which are usually used for emulsion polymerization can be used. In the case where an initiator is used in the emulsion polymerization, a persulfate such as potassium persulfate or ammonium persulfate; benzhydryl peroxide, lauryl peroxide, and t-butyl group can be used as the initiator. Organic peroxides such as peroxy-2-ethylhexanoate; azobisisobutyronitrile, dimethyl-2,2'-diazonium isobutyrate, 2-aminomethylmercaptoazepine An azo compound such as a nitrile; a redox system containing a radical emulsifier having a peroxidation group, a radical emulsifier, a sodium hydrogen sulfite, and a reducing agent such as ferrous sulfate. Further, when an emulsifier is used, one or more selected from the group consisting of an anionic emulsifier, a nonionic emulsifier, and an amphoteric emulsifier which are well known can be used as the emulsifier. Further, a reactive emulsifier having an unsaturated double bond in the molecule or the like can also be used. The molecular weight modifier used in the emulsion polymerization is not particularly limited. Specific examples of the molecular weight modifier include n-hexyl mercaptan, n-octyl mercaptan, n-dodecyl mercaptan, tridecyl mercaptan, n-hexadecyl mercaptan-21 - 200900746, and positive ten Mercaptans such as tetrakisyl mercaptan, tertiary tetradecyl mercaptan, mercaptoacetic acid, etc.: dimethylxanthogen disulfide, diethyl xanthogen disulfide, diisopropyl xanthate II Thioric acid disulfides such as sulfides; thiuram disulfides such as tetramethylthiuram disulfide, tetraethylthiuram disulfide, tetrabutyl thiuram disulfide a halogenated hydrocarbon such as chloroform, carbon tetrachloride, carbon tetrabromide or ethylene bromide; a hydrocarbon such as pentaphenylethane or α-methylstyrene dimer; acrolein or methacrolein; Allyl alcohol '2-ethylhexyl thioglycol, onion oleyl, α-terpinene, γ-terpinene, dipentene, 1,1-diphenylethylene, and the like. Further, these molecular weight modifiers may be used alone or in combination of two or more. Among these, it is more preferable to use a thiol, a xanthogen disulfide, a thiuram disulfide, a 1,1-diphenylethylene or an α-methylstyrene dimer. When the emulsion polymerization is completed, the polymerization conversion ratio of the monomer is preferably 80% by mass or more, more preferably 90% by mass or more, and particularly preferably 95% by mass or more. When the polymerization conversion ratio of the first polymer is less than 80% by mass, if the monomer for constituting the second polymer is supplied, the polymerization stability is deteriorated, or there is a new generation of fine particles. Uneven quality. Next, the monomer constituting the second polymer is polymerized in the presence of the core particles (a) obtained as above. That is, in the state in which the obtained (a) core particle is used as the seed polymer particle, the seed constituting the second polymer is subjected to seed polymerization, and (a) the surface of the (a) core particle can be formed (b). Shell layer. For example, the monomer constituting the second polymer or the pre-emulsion thereof may be 'divided' or continuously dripped in an aqueous medium in which the (a) core particles are dispersed. At this time, the amount of (a) core particles used is suitably changed according to the diameter of the core particles and the thickness of the shell layer of the purpose of -22-200900746, but for 100 parts by mass of the monomer constituting the second polymer. In general, it is preferably 1 to 1 000 parts by mass. Further, in the case where an initiator or an emulsifier is used in the polymerization, the same as those used in the production of the (a) core particles can be used. Further, the conditions such as the polymerization time may be the same conditions as those in the case of (a) production of the core particles. (a) The adjustment of the thickness of the (b) shell layer formed on the surface of the core particle can be carried out by adjusting the weight of the core particle by weight of the monomer. Specifically, a thickness 〇 is formed on the surface of the (a) core particle having an average particle diameter of 2.0 μm. (b) shell layer of 6 μηι, using 100 parts by mass of (a) core particles for 100 parts by mass of monomer, and polymerizing [2] particle composition for antiglare film: antiglare film of the present invention The particle composition contains the above-mentioned (A) particle for an anti-glare film (hereinafter also referred to as "(A) particle")" and (B) a binder component (hereinafter also referred to as "(B) component"). When such a particle composition for an anti-glare film is used, an optical material molded article excellent in anti-glare property can be obtained. The details are explained below. The component (B) contained in the particle composition for an anti-glare film of the present invention may be transparent and dispersed and integrated on the surface of a resin-made sheet or the like (A) particles for an anti-glare film. There is no particular limitation. The component (b) is, for example, a thermoplastic resin of polyvinyl acetate, polyvinyl alcohol, polyvinyl chloride, polyvinyl butyral, poly(meth)acrylate, nitrocellulose, or the like; A thermosetting resin such as a phenol resin, a melamine resin, a polyester resin, a polyurethane resin, or an epoxy resin. These (B) components may be used alone or in combination of two or more. The total light transmittance of the component (B) is preferably 8% or more, more preferably 90% or more. When the total light transmittance is 80% or more, there is an advantage that an optical material molded article having more excellent light transmittance can be produced. Further, "total light transmittance" as used in the present specification means 値 measured according to 〖I s K 7 1 0 5 . The ratio of the component (B) is preferably from 1 to 10,000 parts by mass, more preferably from 2 to 5,000 parts by mass, based on 1 part by mass of the (a) particles, particularly preferably from 3 to 1,000 parts by mass. . When the ratio of the component (B) is less than 1 part by mass, it is difficult to disperse the (A) particles on the surface of a resin-made sheet or the like, for example. On the other hand, when the ratio of the component (B) exceeds 100 00 parts by mass, the amount of particles in the obtained optical material molded article (especially the film) is too small, and the light scattering ability cannot be expressed. In addition to the (A) particles and the component (B), the particle composition for an anti-glare film of the present invention may contain other components such as a curing agent, a dispersing agent, and a dye, as needed. The ratio of the other components is preferably 0 to 10 parts by mass, more preferably 0 to 5 parts by mass, based on the total of 100 parts by mass of the (A) particles and the component (B). Parts by mass. When the above ratio exceeds 10 parts by mass, the total light transmittance is reduced. The particle composition for an anti-glare film of the present invention can be produced, for example, as follows. First, the solvent is removed from the emulsion containing the particles for anti-glare film obtained by the above-described method for producing particles for an anti-glare film to obtain particles for an anti-glare film in a dry state (first step). In the first step, the method of removing the solvent from the emulsion is not particularly limited, but the freeze-drying method and the spray drying method are preferred from the viewpoint of being easily dried. Further, 'in the first step' is preferably dried until the ratio of the solvent becomes 5. More preferably, it is dry until it is 0 mass % or less. 〇The mass% is below. If the ratio of the solvent exceeds 5. When the amount is 0% by mass, the re-dispersibility of the organic solvent is deteriorated, and agglomerates are formed in the above-mentioned composition, so that the crystal is unstable. Next, a step (first step) of mixing the obtained particles for the antiglare film with the component (B) is carried out. In the second step, the particle composition for an anti-glare film of the present invention can be obtained by uniformly mixing the particles for an anti-glare film, the component (B), and other components to be added as needed. Further, other components may be added and mixed after mixing the particles for the anti-glare film and the component (B). The mixing method is not particularly limited, and for example, various kneaders, bead mills, high-pressure homogenizers, and the like can be used. Further, the particle composition for an anti-glare film of the present invention may contain a plurality of particles for an anti-glare film having a different thickness of the shell layer (thickness d of the shell layer shown in Fig. 1). When a plurality of particles for an anti-glare film having a different thickness of a shell layer are used, a phase difference can be generated by incident light of a plurality of wavelengths, whereby an optical material molded article having more excellent anti-glare properties can be obtained. [3] Optical material molded article: This: The optical material molded article of the stomach is made of a resin material containing a resin component and the above-mentioned particles for preventing glare film of -25-200900746. The optical material molded article can be suitably used for, for example, an antiglare film (antiglare film), a light diffusing film, a light diffusing plate, a polarizing plate, or a light guiding plate, etc., because of its excellent antiglare property. Among these, 'anti-glare film is preferred. The details of each are explained below. The resin component is not particularly limited, and is preferably a transparent one having high transmittance to visible light. Furthermore, in the present specification, in addition to being transparent and transparent, the transparency also includes colored transparent and translucent. From the viewpoint of further excellent light transmittance of the obtained optical material molded article, when the resin component is in the form of a sheet having a thickness of 200 μm, the light transmittance at a wavelength of 550 nm is preferably 80% or more, more preferably It is 85% or more, and particularly preferably 90% or more. In addition, the glass transition temperature of the resin component is preferably 100 ° C or more, more preferably 120 t or more, and particularly preferably 150 ° C or more from the viewpoint of having a practical heat resistance. Examples of the resin component include polyethylene terephthalate, poly(methyl) acrylate, polycarbonate, cycloolefin polymer, polyarylate, polyether oxime, polystyrene, and (methyl). a thermoplastic resin such as a methyl acrylate-styrene copolymer or a styrene-acrylonitrile copolymer; an epoxy resin, a vinyl ether resin, a (meth) acrylate having two or more (meth) acrylonitrile groups, A heat-curable resin which is hard or active energy ray such as an oxetane resin or a vinyl ester resin. Among these, from the viewpoint of easy compounding with glass fiber or glass fiber cloth, and heat stability, it is preferably a hardening resin which is hardened by heat or active energy rays, more preferably epoxy resin, Two or more (meth) acrylonitrile-based (meth) acrylates. -26- 200900746 The ratio of the resin component is from 1 to 99% by mass, more preferably from 10 to 95% by mass based on 100% by mass of the resin material. /. , especially good for 30~9〇% by mass. When the ratio of the resin component is less than 1% by mass, the particles for the anti-glare film cannot be immobilized in the optical material molded article (especially a film). On the other hand, if it exceeds 99% by mass, the light-scattering ability of the particles for the anti-glare film may not be exhibited. On the other hand, the ratio of the particles for the anti-glare film is preferably from 1 to 99% by mass, more preferably from 5 to 90% by mass, particularly preferably from 10 to 70% by mass of the resin material of 100% by mass. quality%. When the ratio of the particles for the anti-glare film is less than i mass%, the light-scattering ability of the particles for the anti-glare film may not be exhibited. On the other hand, when it exceeds 99% by mass, the particles for the antiglare film cannot be immobilized in the optical material molded article (especially a film). The optical material molded article of the present invention can be extruded, for example, by supplying the resin component and the particles for the anti-glare film to the extruder, and then the master batch is supplied to the extruder in the cavity. It is obtained by a method of injection and molding, and the like. [4] Anti-glare film: The anti-glare film of the present invention comprises an anti-glare layer formed of the particle composition for an anti-glare film formed on at least one surface of a base material layer. [4 - 1 ] Base material layer: The base material layer is preferably a layer made of a transparent (colorless transparent, colored transparent ' or translucent) resin. As the above-mentioned resin, for example, -27 to 200900746 can be suitably used in the same manner as the resin component contained in the above resin material. The substrate layer is not particularly limited, and is preferably 〇. 〇3~〇. 3mm, more preferably 0. 2mm ° [4-2] Anti-glare layer: The anti-glare layer is a layer formed by the particle composition for the anti-glare film formed on at least one surface of the base material layer, and the thickness thereof is particularly limited. Preferably, its thickness is 〇. 〇 〇 5~0. 1 m m, 0-008~0. 08mm. The thickness of the anti-glare layer is lower than 〇. 〇〇 5mm, less than enough anti-glare. On the other hand, if the total light transmittance exceeds 0 · 1 mm, the total light transmittance will decrease. The anti-glare film of the present invention can be obtained, for example, by dissolving the anti-glare film composition described above in an organic solvent to obtain a slurry in a slurry form, and applying the slurry to the surface of the substrate layer by a well-known kneader. After it has been made into a desired thickness, it is dried and manufactured. Examples of the organic solvent include water, toluene, cyclohexanone, methyl isobutyl ketone (MIBK), methyl ethyl ketone (N-methyl-2-pyrrolidone (NMP), and the like. Further, these may be used in combination of two or more kinds. The ratio of the organic solvent is preferably from 10 to 2000 parts by mass, based on 100 parts by mass of the solid content of the antiglare film-forming product, 20 ～1000 parts by mass. [Example] Thickness 0. 05 ~ The system is not better, then the useful particles are the above-mentioned hexane, MEK). A single particle group is more preferably -28-200900746. The following is based on the example to specify this. This is defined by these embodiments. In addition, the measurement method and the [average particle diameter] of various physical properties are shown below, and the average particle diameter is a sweep (product of the Japan Electronics Co., Ltd.). In the case of the "JSM-6030LA", the particles for the anti-glare film were observed at a magnification of 5 times, and the particles were analyzed by image analysis. [Positive Reflected Light Intensity]: A film-form optical material having a thickness of 10 μm was formed by applying a particle composition for an anti-glare film to a base material layer to form a "film", and the film was measured for incident using a Murakami color meter. Corner 2 0. The intensity of the regular reflected light. The intensity of the measured specular reflected light is converted as 1 0 0, and the evaluation is performed. [Visual Evaluation of Anti-glare Property] An optical material molded article was obtained in the same manner as the above evaluation of [positive-reflected light intensity]. The film was evaluated for the state of the fluorescent lamp. The invention of this evaluation was visually observed, but the "parts in the comparative example of the present invention are based on mass. The evaluation method of the characteristics is described by an electron microscope or a photograph of 10 times of the above-mentioned 10, and the drying is performed. In the case of the product (the following is also described in the metric), the light of the film is converted into a thin film by the conversion of the standard plate (Yao Yao. Evaluation criteria • 29 - 200900746). ◎: There is almost no dazzling 〇: less dazzling △: glare x: dazzling large [haze (%)] In the same manner as the above [positive reflected light intensity], a film-shaped @ optical material molded article is produced. In the optical material molded article, a haze meter manufactured by SUGA Test Instruments Co., Ltd. was used, and _degree (%) was measured in accordance with JIS K7105. [Visual Evaluation of White Clouding Sense] A film was produced in the same manner as the above evaluation of [normal reflection light intensity]. In the film (optical material molded article), the white turbidity was visually evaluated by observing the brightness of the outline of the fluorescent lamp when the spotlight was viewed through the film. The evaluation criteria were as follows. :The outline is sharp: The outline is slightly sharper △: The outline is slightly blurred. x: The outline is blurred. [Full light transmittance]: In the same manner as the above evaluation of [positive reflected light intensity], film-like -30-200900746 optical is produced. For the film (optical material molded article), a haze meter manufactured by SUGA Test Machine Co., Ltd. was used, and the state in which the sample was not fixed (that is, the total light transmittance of air) was regarded as 1 according to JIS Κ71〇5. (Example 1) [Synthesis of particles for anti-glare film]: First, monodisperse particles are produced by emulsion polymerization. Specifically, potassium persulfate is used as a water-soluble initiator. 90 parts of styrene and 10 parts of methacrylic acid were emulsion-polymerized to prepare a structural unit derived from styrene (indicated by "ST structural unit" in Table 1) and a structural unit derived from methacrylic acid (Table 1). The composition ratio (mass ratio) of "methacrylic acid structural unit" is a monodisperse particle having an average particle diameter of 1 · 0 μηη of 9 0 : 10 0. Next, 2 parts of 3, 5, 5 - 3 Methyl hexyl peroxide (trade name "Pero" Yl 355", made by Japan Oil Company, water solubility: 0. 01%), 〇 · 1 part of sodium lauryl sulfate and 20 parts of water were emulsified by stirring, and then micronized by a sonic homogenizer (manufactured by MIZUHO Co., Ltd.) to obtain an aqueous dispersion. To the obtained aqueous dispersion, 15 parts of the above monodisperse particles were added and stirred for 16 hours. After stirring, 95 parts of styrene (ST) and 5 parts of divinylbenzene (DVB) were added, and the mixture was stirred at 40 ° C for 3 hours to allow the monodisperse particles to absorb styrene and divinylbenzene. Then, polymerization was carried out for 3 hours by raising the temperature to 75 ° C to obtain an emulsion containing the (a) core particles of the first polymer. Furthermore, the average particle size of the core particles of (a) -31 - 200900746 is 2. At 0 μm, the coagulating system hardly occurred. Also, the first polymer contains: 94. 3 mass% of structural units derived from styrene as (al) aromatic vinyl monomer units, 1. 4% by mass of the structural unit derived from methacrylic acid as a monomer unit of (a2) having a polar functional group, and 4. 3 mass% of the structural unit derived from divinylbenzene as the (a3) polyfunctional monomer unit, and (a4) the other monomer unit is 〇 mass%, i.e., does not contain (a4) other monomer units. Then, mix 22. One part of the aqueous dispersion similar to the above aqueous dispersion and 40 parts (but as a solid component) of the above emulsion containing (a) core particles (seed polymer particles) were stirred for 16 hours. After stirring, 8 parts of methyl methacrylate (MMA) and 2 parts of trimethylolpropane trimethacrylate (TMPMA) were added and stirred at 40 ° C for 1 hour to absorb (a) core particles. Methyl methacrylate and trimethylolpropane trimethacrylate. Then, by raising the temperature to 75 ° C, a polymerization reaction was carried out for 3 hours to form a (b) shell layer of the second polymer coated on the surface of the (a) core particle. In this manner, an emulsion containing particles for an anti-glare film (hereinafter also referred to as "particle (A)")) composed of the (a) core particle and the (b) shell layer was obtained. The particles (A) in the emulsion are made of a core shell and have an average particle diameter of about 2. At 2 μm, the coagulum hardly occurred. Further, (b) the thickness of the shell layer is calculated from the difference between the average particle diameter of the particles (A) and the average particle diameter of the (a) core particles, which is 0. 2μιη. Further, the first polymer contains 80% by mass of a structural unit derived from methyl methacrylate as a (b2) (meth) acrylate monomer unit, and 20% by mass as a (b3) The functional monomer unit is derived from trimethylolpropane trimethacrylate in the form of -32-200900746, and the (b) other structure, single k, is in the zero-mass. /β' does not contain (bl) an aromatic vinyl monomer unit and (a4) another monomer unit. (Examples 2 to 4, Comparative Examples i to 4) In the same manner as in Example 1, except for the blending prescription shown in Table 1, the particles (particles (B) to (H)) containing the antiglare film were obtained. Emulsion. Various physical properties are shown in Table 1. Further, Comparative Examples 1 to 3 were synthesized without using the first polymer. -33- 200900746 [Table 1] Blending Formulation (Part) Example Comparative Example 1 2 3 4 1 2 3 4 (8) Formation of Core Particles (First Polymer) Seed Polymer Particles ST Structural Unit (Mass Ratio) 90 90 90 90 - - - 90 Methacrylic acid construction unit (mass ratio) 10 10 10 10 - - - 10 Blending amount 15 15 15 15 - _ _ 15 ST 95 95 95 95 _ _ 95 DVB 5 5 5 5 - _ 5 (b) Formation of the shell layer of the first polymer 40 12 40 12 . _ 2. 2 ST _ 3 3 _ 30 80 DVB _ _ 2 2 • 20 20 _ MMA 8 8 5 5 80 50 _ 80 TMPMA 2 2 . A 20 20 particle (8) (B) (C) (D) (E) (F) (6) (H) (a) diameter of the core particle (μιη) 2. 0 2. 0 2. 0 2. 0 0 0 0 0. 7 (b) Thickness of the shell layer 0. 2 0. 6 0. 2 0. 6 0 0 0 2. 3 overall particle size 2. twenty two. 6 2. twenty two. 6 2. 3 2. 4 2. 3 3. 0 Construction unit (Mm%) (al) 94. 3 94. 3 94. 3 94. 3 0 0 0 94. 3 (a2) 1. 4 1. 4 1. 4 1. 4 0 0 0 1. 4 (a3) 4. 3 4. 3 4. 3 4. 3 0 0 0 4. 3 (a4) 0 0 0 0 0 0 0 0 (bl) 0 0 30 30 0 30 80 0 (b2) 80 80 20 20 80 20 20 80 (b3) 20 20 50 50 20 50 0 20 (b4) 0 0 0 0 0 0 0 0 - 34 - 200900746 (Example 5) [Preparation of particle composition for anti-glare film and production of optical material molded article]: First, use a spray dryer (model "B-290 type", The emulsion containing the particles (A) obtained in Example 1 was dried to obtain powdery particles (A). Then, a mixture of 00 parts of dipentaerythritol pentaacrylate and dipentaerythritol hexaacrylate was mixed (indicated by "DPHA" in Table 2 (trade name "Ar〇nix M402", manufactured by Toagosei Co., Ltd.), and 100 parts of organic A solvent (toluene/cyclohexanone = 9 /1 ) was obtained to obtain a mixed liquid. To the obtained mixed liquid, 1 part by weight of the above-mentioned powdery particles (A) and dispersion were prepared to prepare a particle composition for an antiglare film. Secondly, the particle composition of the anti-glare film obtained by the US-Asian rod is coated to a thickness of 0. 2 mm polyethylene terephthalate (PET) substrate (base material layer). At this time, the coating amount of the particle composition for an anti-glare film is adjusted so that the thickness of the coating layer (anti-glare layer) after drying becomes 1 〇 μηη (0. 01mm). After drying, the ultraviolet ray of 500 00 mJ/cm 2 is irradiated with a high-pressure mercury lamp to cure the coating layer to produce an optical material molded product (anti-glare film). The optical material molded article (anti-glare film) produced is subjected to the above various types. Evaluation. Evaluation results: The intensity of the specular reflected light was 7.8, and the visual evaluation of the anti-glare property was 〇, and the haze was 3 _ 5 %. The visual evaluation of the white turbidity was ◎, and the total light transmittance was 93 3%. Further, the haze of the above-mentioned PET substrate is 2. 8%, total light transmittance is 8 7. 3 %. -35-200900746 (Examples 6 to 8 and Comparative Examples 5 to 8) In addition to the blending prescription shown in Table 2, the particle composition for an anti-glare film was prepared in the same manner as in Example 5. Then, an optical material was prepared into an article (anti-glare film) in the same manner as in Example 5, except that the particle composition for the anti-male film was prepared, and the above various evaluations were carried out. Table 2 shows the evaluation of 纟吉果 [Table 2] Miscellaneous prescription (parts) Anti-glare white turbidity DPHA solvent ί 立 正 正 反 反 反 ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( Visually, the soil shattering transmittance type blending amount 100 is corrected) Evaluation (%) Evaluation (%) Example 5 100 100 (Α) 10 78 〇 3. 5 ◎ m ^ Example 6 100 100 (Β) 10 89 〇 5. 4 ◎ QA 实施 Example 7 100 100 (C) 10 37 ◎ 26. 2 △ Q9 ο Example 8 100 100 den 10 39_ ◎ 25. 3 Δ 96. 5 Comparative Example 5 100 100 (Ε) 10 122 X 2. 3 ◎ Comparative Example 6 100 100 (F) 10 56 〇 24. 9 △ J^ cn 1 Comparative Example 7 100 100 (G) 10 30 ◎ 49. 5 X QA Comparative Example 8 100 100 (Η) 10 120 X 2. 8 ◎ -7H-. 0 Q9 0 Substrate " - - - - - 2. 8 87. 3 氺1 : PET (thickness: 200 μm) As shown in Table 2, the optical material molded articles (anti-glare film) of Examples 5 to 8 produced using the particles for anti-glare film of Examples 丨 to 4, and used In comparison with the optical material molded articles (anti-glare films) of Comparative Examples 5 to 8 produced by the particles for anti-glare film of Comparative Examples 1 to 4, the balance between the anti-glare property and the white turbidity (-36-200900746 transmittance) was confirmed as Very good. It is considered that this is because (a) the reflected light of the core particles interferes with (b) the reflected light of the shell layer. INDUSTRIAL APPLICABILITY The particles for an anti-glare film of the present invention are excellent in anti-glare properties and excellent in anti-glare property and white turbidity (transparency) by being contained in an optical material molded article. The optical material molded article is specifically suitable for inclusion in an anti-glare film (anti-glare film), a light-diffusing film, a light diffusing plate, a polarizing plate, or a light guiding plate, and is particularly contained in an anti-glare film. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing an embodiment of particles for an anti-glare film of the present invention, and is an explanatory view showing an optical path of incident light and reflected light. [Explanation of main component symbols] 1 1 : Shell layer 1 2 : Core particles d = Thickness of shell layer N: Incident light H-1, H-2: Reflected light -37-