JP2020100107A - 光学的立体造形用組成物、並びに立体造形物、及びその製造方法 - Google Patents
光学的立体造形用組成物、並びに立体造形物、及びその製造方法 Download PDFInfo
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- JP2020100107A JP2020100107A JP2018241327A JP2018241327A JP2020100107A JP 2020100107 A JP2020100107 A JP 2020100107A JP 2018241327 A JP2018241327 A JP 2018241327A JP 2018241327 A JP2018241327 A JP 2018241327A JP 2020100107 A JP2020100107 A JP 2020100107A
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Classifications
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Abstract
Description
ことができる。
参考例1〜12、実施例1〜3及び比較例1〜4の光学的立体造形用組成物を、以下の手順で調整した。表1に示す組成の重量部に従って全ての成分を、撹拌容器に仕込み、20〜40℃で2時間撹拌して液体組成物を得た。この液体組成物を、10ミクロンフイルターバッグ(PO−10−PO3A−503、Xinxiang D.King industry社製)でろ過して異物を除去し、一晩放置後に脱気して透明な液体組成物を得た。なお、調整した光学的立体造形用組成物の各々を数ml取って台の上に配置し、イソプロピルアルコールをかけると、いずれも容易に洗い流すことができた。
・KAYARAD R−604:成分(A1)のジオキサングリコールジアクリレート、粘度200〜400mPa・s(25℃)、酸価<1.0、日本化薬社製
・NKオリゴUA−122P:成分(A2)のポリエステル系ウレタンアクリレート、粘度45000mPa・s(40℃)、分子量1100、新中村化学社製
・NKオリゴUA−160TM:成分(A3)のポリエーテル系ウレタンアクリレート、粘度2500mPa・s(40℃)、分子量1600、新中村化学社製
・アロニックスM−306:成分(A4)のラジカル重合性化合物であるペンタエリスリトールトリ及びテトラアクリレートの混合物(トリ体65〜70%)、粘度400〜650mPa・s/25℃、東亜合成社製
・ライトアクリレート4EG−A:成分(A4)のラジカル重合性化合物であるPEG400#ジアクリレート(エチレンオイサイド4モル付加物)、粘度10〜12mPa・s/25℃、共栄社化学社製
・イルガキュアー907:成分(B)の光重合開始剤である2−メチル−1−(4−メチルチオフェニル)−2−モルホリノプロパン−1−オン、BASF社製
・カレンズMTNR1:成分(C)の増感剤である1,3,5−トリス(3−メルカプトブチリルオキシエチル)−1,3,5−トリアジン−2,4,6−(1H,3H,5H)−トリオン、昭和電工社製
光学的立体造形用組成物の硬化時間を評価するために、以下の手順でサンプルを製作した。実施例1の光学的立体造形用組成物を手製のポリエチレン製長方形型(幅約10mm×長さ100mm×、深さ5mm)に1mm液膜になるように流し込み、3kw高圧水銀等(波長365nm、距離1m)で、5秒間、10秒間、15秒間、20秒間、25秒間、30秒間、各々照射し、評価サンプルAを得た。実施例2〜12及び比較例1〜4の光学的立体造形用組成物についても、同様にして評価サンプルAを得た。
光学的立体造形用組成物の硬化時間を評価するために、以下の手順でサンプルを製作した。実施例1の光学的立体造形用組成物を手製のポリエチレン製長方形型(幅約10mm×長さ100mm×、深さ5mm)に1mm液膜になるように流し込み、3kw高圧水銀灯(波長365nm、距離1m)で20秒間照射し、これを合計4回繰り返して厚さ約4mmの平面板(幅約10mm×長さ100mm)を作成した。さらに平面板を30分間再照射し、光学的立体造形物である評価サンプルBを得た。実施例2〜12及び比較例1〜4の光学的立体造形用組成物についても、同様にして評価サンプルBを得た。
1.光学的立体造形用組成物の硬化時間の評価
評価サンプルAを用いて、照謝時間の短いサンプルからその表面状態を観察し、表面のタックが無い評価サンプルAに係る照射時間を硬化時間とした。なお、「表面のタックの有無」は、評価サンプルAをオーブンに入れて35℃で30分間処理し、室温(25℃)まで冷却した後、評価サンプルAの表面にポリエステルフイルムを手で押し当て、ポリエステルフイルムが簡単に剥がれなければタック有りとし、剥がれればタック無しとして判断した。評価サンプルAの硬化時間を表2に示した。
評価サンプルBを用いて、平面板の層(側面)を日本電子JSM−5600型走査電子顕微鏡(加速電圧7kv、倍率200倍)で観察した。評価の基準は、層間の隙間が存在する場合は(「×」)、層間の隙間がない場合は(「〇」)、とした。結果を表2に示した。
評価サンプルBの平面板を平台に置いて、その端部が平台から浮いた距離を測定する。判定の基準は、浮いた距離2mm以上の場合は(「×」)、浮いた距離2mm以下で浮いている場合は(「△」)、浮いた距離0mmつまり浮いていない場合は(「〇」)、とした。結果を表2に示した。
評価サンプルBの平面板について、ISO527−1に準拠して、以下の測定条件で引張り強度及び伸度を測定した。伸度は、破断時の最大の伸び率として測定した。結果を表2に示した。
測定装置:インストロン社製3366型万能試験機
引張速度(クロスヘッド速度):5mm/分
測定環境:温度25℃、湿度45%RH
標点間距離:80mm
評価サンプルBの平面板の3点曲げ試験を、ISO527−1に準拠して、以下の測定条件で行い、曲げ強度及び曲げ弾性率を測定した。結果を表2に示した。
測定装置:インストロン社製3366型万能試験機
試験条件:3点曲げ試験治具 圧子半径5mm
支点間距離64mm
負荷速度(クロスヘッド速度)2mm/分
測定環境:温度25℃、湿度45%RH
評価サンプルBについて、以下の測定条件で裸落下試験を行い、割れの有無を目視で観察し、落下割れ観察をした。結果を表2に示した。
落下床面:大理石床タイル
落下高さ:3m
サンプルの重さ:14.5g
サンプルの落下角度:大理石床タイル面に対して60度
判定の基準は、サンプル5つを落下させて、ヒビを含めた割れサンプル個数を記録した。
評価サンプルBの端部10mmを万力で挟んで固定した。評価サンプルBの片方の端部をペンチで挟み、往復10回左右に折り曲げた。試験後、折り曲げた部位の外観を目視で観察する。判定の基準は、〇:変化なし、△:白く変色、▲:ひび割れ、×:割れた、とした。
Claims (3)
- (A)ラジカル重合性化合物として、
(A1)ジオキサン(メタ)アクリレートのラジカル重合性化合物と、
(A2)2官能ポリエステル系ウレタン(メタ)アクリレートのラジカル重合性化合物と、
(A3)2官能ポリエーテル系ウレタン(メタ)アクリレートのラジカル重合性化合物と、
(A4)前記(A1)、前記(A2)及び前記(A3)以外のラジカル重合性化合物と、
(B)光重合開始剤と、
(C)増感剤と
を少なくとも含む光学的立体造形用組成物であって、
前記(A1)のラジカル重合性化合物が2〜40質量%、
前記(A2)のラジカル重合性化合物が5〜40質量%、
前記(A3)のラジカル重合性化合物が5〜40質量%、
前記(A4)のラジカル重合性化合物が20〜87重量%、
前記(B)の光重合開始剤が0.1〜5質量%、
前記(C)の増感剤が0.1〜5質量%である、光学的立体造形用組成物。 - 請求項1に記載の光学的立体造形用組成物に、活性エネルギー線を照射して硬化させる工程を含む、立体造形物の製造方法。
- 請求項1に記載の光学的立体造形用組成物の硬化物を含む立体造形物。
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