JP6791615B2 - 紫外線架橋性組成物 - Google Patents
紫外線架橋性組成物 Download PDFInfo
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- JP6791615B2 JP6791615B2 JP2015044779A JP2015044779A JP6791615B2 JP 6791615 B2 JP6791615 B2 JP 6791615B2 JP 2015044779 A JP2015044779 A JP 2015044779A JP 2015044779 A JP2015044779 A JP 2015044779A JP 6791615 B2 JP6791615 B2 JP 6791615B2
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- BWJUFXUULUEGMA-UHFFFAOYSA-N propan-2-yl propan-2-yloxycarbonyloxy carbonate Chemical compound CC(C)OC(=O)OOC(=O)OC(C)C BWJUFXUULUEGMA-UHFFFAOYSA-N 0.000 description 1
- KOPQZJAYZFAPBC-UHFFFAOYSA-N propanoyl propaneperoxoate Chemical compound CCC(=O)OOC(=O)CC KOPQZJAYZFAPBC-UHFFFAOYSA-N 0.000 description 1
- YPVDWEHVCUBACK-UHFFFAOYSA-N propoxycarbonyloxy propyl carbonate Chemical compound CCCOC(=O)OOC(=O)OCCC YPVDWEHVCUBACK-UHFFFAOYSA-N 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000000967 suction filtration Methods 0.000 description 1
- 238000010557 suspension polymerization reaction Methods 0.000 description 1
- OPQYOFWUFGEMRZ-UHFFFAOYSA-N tert-butyl 2,2-dimethylpropaneperoxoate Chemical compound CC(C)(C)OOC(=O)C(C)(C)C OPQYOFWUFGEMRZ-UHFFFAOYSA-N 0.000 description 1
- NMOALOSNPWTWRH-UHFFFAOYSA-N tert-butyl 7,7-dimethyloctaneperoxoate Chemical compound CC(C)(C)CCCCCC(=O)OOC(C)(C)C NMOALOSNPWTWRH-UHFFFAOYSA-N 0.000 description 1
- GJBRNHKUVLOCEB-UHFFFAOYSA-N tert-butyl benzenecarboperoxoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC=C1 GJBRNHKUVLOCEB-UHFFFAOYSA-N 0.000 description 1
- 238000001721 transfer moulding Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
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- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
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- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
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- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/04—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of esters
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- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
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- B29C2035/0827—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using UV radiation
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- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
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- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2033/00—Use of polymers of unsaturated acids or derivatives thereof as moulding material
- B29K2033/04—Polymers of esters
- B29K2033/12—Polymers of methacrylic acid esters, e.g. PMMA, i.e. polymethylmethacrylate
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- B32B2250/24—All layers being polymeric
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- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
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Description
紫外線架橋性組成物を含むアクリルフィルムにおいて、紫外線照射により架橋が生じているかをゲル分率測定により観察する。紫外線が照射された0.5gのアクリルフィルムを切り出して秤量する。切り出されたアクリルフィルム及び25gのテトラヒドロフラン(THF)を50mLバイアル瓶に入れて密封し、1日間振とう機によって振とうする。混合物を桐山ロート(登録商標)No.6を用いて吸引ろ過する。ろ液を90℃、1時間乾燥し、残渣を秤量する。ゲル分率を以下の式から計算する。
ゲル分率(%)=(1−y/x)×100
x:アクリルフィルムの質量(g)
y:残渣の質量(g)
各成分のガラス転移温度(Tg)は、動的粘弾性測定装置ARES(ティー・エイ・インスツルメント・ジャパン株式会社製、日本国東京都品川区)を使用して測定する。各成分のフィルムを直径7.9mmに打ち抜いて試料を作製し、−60℃から250℃まで昇温速度5℃/分にて昇温し、周波数1.0Hzのせん断モードで12秒毎にせん断貯蔵弾性率G’及びせん断損失弾性率G”を測定して得られた損失係数tanδ(=せん断損失弾性率G”/せん断貯蔵弾性率G’)のピーク温度をガラス転移温度とする。
各成分の粘度(Pa・s)は、動的粘弾性測定装置ARES(ティー・エイ・インスツルメント・ジャパン株式会社製、日本国東京都品川区)を使用して測定する。各成分のフィルムを直径7.9mmに打ち抜いて試料を作製し、−60℃から250℃まで昇温速度5℃/分にて昇温し、周波数1.0Hz(測定周波数)のせん断モードで230℃におけるせん断損失弾性率G”を測定し、その値を測定周波数で割った値を粘度とする。
鉛筆硬度は、試験装置としてPSH540−401T(株式会社東洋精機製作所製、日本国東京都北区)を用い、JIS K5600−5−4に準拠して測定する。
各成分の数平均分子量Mn及び重量平均分子量Mwの測定は、GPC(ゲルパーミエーションクロマトグラフ)法により、以下の装置及び条件を用いて行う。
装置:HP−1090 Series II(Hewlett−Packard社製)
溶媒:テトラヒドロフラン
カラム:Plgel MIXED−Bx2(300mm×外径7.5mm、内径5mm)
フローレート:1.0mL/分
検出手段:屈折率
サンプル濃度:0.1質量%
キャリブレーション標準:ポリスチレン
表2に示す材料を500mL又は225mLのスクリュー瓶に入れ、窒素バブリングを10分間行った後、水浴中65℃で24時間反応させた。得られた添加剤1〜3をPETフィルムライナーの上にコーティングし、100℃で10分間乾燥した。添加剤1〜3から得られたアクリルフィルム層を真空中120℃で数時間乾燥して得られた固体をそれぞれ添加剤4〜6とした。
表3に示す材料を1L瓶に入れ、窒素バブリングを10分間行った後、水浴中65℃で24時間反応させた。得られた反応生成物の溶液782.52部を111.79部の酢酸ブチルで希釈して熱可塑性アクリル樹脂1(PMMA樹脂)の35%酢酸エチル/酢酸ブチル溶液を得た。
脱イオン水200質量部、及び懸濁助剤であるリン酸水素二ナトリウム0.5質量部を反応器に仕込んだ。次に300rpmで攪拌しながら、反応器にLPO 0.95質量部を溶解させたMMA86.8質量部、EA10.3質量部、MAA2.8質量部、及びチオグリコール酸2−エチルヘキシル0.15質量部からなるモノマー混合液を加え、反応器内を窒素置換しながら60℃で3時間、さらに80℃で3時間重合させた。得られた重合体に対して、樹脂量の3倍量の脱イオン水を用いた水洗を4回実施し、乾燥することでビーズ状の懸濁重合体粒子を得た。得られた重合体の体積平均粒子径は約500μm、Mnは15万、Mwは34万であった。得られた懸濁重合体粒子を酢酸エチル/酢酸ブチルで溶解して熱可塑性アクリル樹脂2の35%酢酸エチル/酢酸ブチル溶液を得た。
脱イオン水200質量部、及び懸濁助剤であるリン酸水素二ナトリウム0.5質量部を反応器に仕込んだ。次に300rpmで攪拌しながら、反応器にLPO 0.95質量部を溶解させたMMA86.5質量部、EA10.0質量部、2−HEMA3.5質量部、及びチオグリコール酸2−エチルヘキシル0.10質量部からなるモノマー混合液を加え、反応器内を窒素置換しながら60℃で3時間、さらに80℃で3時間重合させた。得られた重合体に対して、樹脂量の3倍量の脱イオン水を用いた水洗を4回実施し、乾燥することでビーズ状の懸濁重合体粒子を得た。得られた重合体の体積平均粒子径は約500μm、Mnは21万、Mwは57万であった。得られた懸濁重合体粒子を酢酸エチル/酢酸ブチルで溶解して熱可塑性アクリル樹脂3の35%酢酸エチル/酢酸ブチル溶液を得た。
脱イオン水200質量部、及び懸濁助剤であるリン酸水素二ナトリウム0.5質量部を反応器に仕込んだ。次に300rpmで攪拌しながら、反応器にLPO 0.95質量部を溶解させたMMA86.6質量部、MA10.5質量部、MAA2.8質量部、及びチオグリコール酸2−エチルヘキシル0.15質量部からなるモノマー混合液を加え、反応器内を窒素置換しながら60℃で3時間、さらに80℃で3時間重合させた。得られた重合体に対して、樹脂量の3倍量の脱イオン水を用いた水洗を4回実施し、乾燥することでビーズ状の懸濁重合体粒子を得た。得られた重合体の体積平均粒子径は約500μm、Mnは16万、Mwは36万であった。得られた懸濁重合体粒子を酢酸エチル/酢酸ブチルで溶解して熱可塑性アクリル樹脂4の35%酢酸エチル/酢酸ブチル溶液を得た。
脱イオン水200質量部、及び懸濁助剤であるリン酸水素二ナトリウム0.5質量部を反応器に仕込んだ。次に300rpmで攪拌しながら、反応器にLPO 0.95質量部を溶解させたMMA86.6質量部、MA10.5質量部、MAA2.8質量部、及びチオグリコール酸2−エチルヘキシル0.35質量部からなるモノマー混合液を加え、反応器内を窒素置換しながら60℃で3時間、さらに80℃で3時間重合させた。得られた重合体に対して、樹脂量の3倍量の脱イオン水を用いた水洗を4回実施し、乾燥することでビーズ状の懸濁重合体粒子を得た。得られた重合体の体積平均粒子径は約500μm、Mnは8万、Mwは17万であった。得られた懸濁重合体粒子を酢酸エチル/酢酸ブチルで溶解して熱可塑性アクリル樹脂5の35%酢酸エチル/酢酸ブチル溶液を得た。
脱イオン水200質量部、及び懸濁助剤であるリン酸水素二ナトリウム0.5質量部を反応器に仕込んだ。次に300rpmで攪拌しながら、反応器にLPO 0.95質量部を溶解させたMMA97.2質量部、MAA2.8質量部、及びチオグリコール酸2−エチルヘキシル0.35質量部からなるモノマー混合液を加え、反応器内を窒素置換しながら60℃で3時間、さらに80℃で3時間重合させた。得られた重合体に対して、樹脂量の3倍量の脱イオン水を用いた水洗を4回実施し、乾燥することでビーズ状の懸濁重合体粒子を得た。得られた重合体の体積平均粒子径は約500μm、Mnは7万、Mwは17万であった。得られた懸濁重合体粒子を酢酸エチル/酢酸ブチルで溶解して熱可塑性アクリル樹脂6の35%酢酸エチル/酢酸ブチル溶液を得た。
固形分が表5に示す配合比となるように全ての材料を瓶に入れて混合した。得られた混合物をPETフィルムライナーの表面に塗布し、100℃で10分乾燥して、厚さ20μmのアクリルフィルムを得た。
表6に示す配合比で全ての材料を混合機(ブラベンダー社製、Plasti−Corder(商標)PL2100)中、230℃で10分間混合した。ホットプレスを用いて160℃で混合物を延伸して厚さ75μmのアクリルフィルムを得た。
紫外線照射装置(H−バルブ、DRSモデル、Fusion UV System Inc.)を用いて紫外線(UV−C)を照射量90mJ/cm2でアクリルフィルムに照射した。表5及び表6にAEBP含有率(μmol/g)と合わせて、UV照射前後のゲル分率(%)を示す。
以下の手順で、紫外線架橋性組成物を用いた最外層を有する加飾フィルムを作製した。
MMA95質量部、MAA4質量部、水酸基含有モノマーとして2−HEMA1質量部、溶媒として酢酸エチル150質量部、及び重合開始剤としてV−601 0.6質量部を混合し、窒素雰囲気下、65℃で24時間重合反応を行い、(メタ)アクリル共重合体の酢酸エチル溶液を調製した。
水系ポリウレタン溶液D6260を中間表面層の上にナイフコートにより塗布し、その後160℃で2分間乾燥して、厚さ30μmのポリウレタンからなる基体層を中間表面層上に形成した。
BA94質量部、AA6質量部、溶媒として酢酸エチル185.7質量部、及び重合開始剤としてV−65 0.2質量部を混合し、窒素雰囲気下、50℃で24時間反応させ、アクリルポリマーAの酢酸エチル溶液を調製した。アクリルポリマーAの重量平均分子量は約58万であった。
表7に示す材料を80℃で4時間乾燥した後、同表に示す配合比で混合機(ブラベンダー社製、Plasti−Corder(商標)PL2100)中、230℃で10分間混合した。次に、PETフィルムT−60を剥がして露出させた中間表面層の上に、一軸熱可塑性樹脂押出機を用いて160℃で混合物を延伸して厚さ120μmのアクリル最外層を積層した。
ポリウレタン基体層とポリエステルフィルムに担持されたアクリル接着層とを対向させて、温度60℃、圧力2kgfの条件下、ロール式ラミネーターで貼り合わせた。このようにして、紫外線架橋性組成物を最外層として有する加飾フィルムを作製した。
加飾フィルムの最外層側から紫外線を照射した後、加飾フィルムの接着層からポリエステルフィルムを剥離して接着層を剥き出しにし、TOMを用いて、成形温度125℃で面積伸び率が100%となるように加飾フィルムをABS/PC基板に接着層を介して貼り付けた。紫外線架橋性組成物からなる最外層にクラックなど外観不良などが無い場合、加熱延伸性良好とする。加飾フィルムの加熱延伸性を最外層の鉛筆硬度の試験結果と合わせて表7に示す。
例17の加飾フィルムの最外層にエンボス(凹凸)形状を有する型を加熱しながら接触させることにより、エンボス(凹凸)形状を最外層に形成した。この時点でのエンボス(凹凸)形状の深さは33μmであった。その後、最外層側から紫外線照射装置(H−バルブ、DRSモデル、Fusion UV System Inc.)を用いて紫外線(UV−C)を照射量90mJ/cm2で照射した。そして、加飾フィルムの接着層からポリエステルフィルムを剥離して接着層を剥き出しにし、TOMを用いて、成形温度135℃で面積伸び率が100%となるように加飾フィルムをABS/PC基板に接着層を介して貼り付けた。このサンプルの最外層にはクラックなど外観不良などが存在せず、加熱延伸性は良好であった。最外層の鉛筆硬度は2Hであった。この時点でのエンボス(凹凸)形状の深さは26μmであった。エンボス(凹凸)形状の深さの測定は、試料をカミソリ刃で切断した後に、その切断面を光学顕微鏡(VHX−600、株式会社キーエンス製)で観察することにより測定した。
[1]
ガラス転移温度が25℃以上である熱可塑性アクリル樹脂と、
紫外線架橋性部位を有しガラス転移温度が25℃以上である(メタ)アクリル系共重合体と
を含む紫外線架橋性組成物。
[2]
前記紫外線架橋性部位が、紫外線照射により水素ラジカルを引き抜くことが可能な構造を有する、項目1に記載の紫外線架橋性組成物。
[3]
前記紫外線架橋性部位がベンゾフェノン基である、項目2に記載の紫外線架橋性組成物。
[4]
前記ベンゾフェノン基のモル数が、前記熱可塑性アクリル樹脂と前記紫外線架橋性部位を有しガラス転移温度が25℃以上である(メタ)アクリル系共重合体の合計質量を基準として0.3〜320μmol/gである、項目3に記載の紫外線架橋性組成物。
[5]
前記熱可塑性アクリル樹脂がメチルメタクリレート単位を20〜100質量%含み、前記紫外線架橋性部位を有しガラス転移温度が25℃以上である(メタ)アクリル系共重合体が、メチルメタクリレート及びベンゾフェノン基を有する(メタ)アクリレートを含むモノマー混合物の共重合体である、項目3又は4のいずれかに記載の紫外線架橋性組成物。
[6]
前記紫外線架橋性部位を有しガラス転移温度が25℃以上である(メタ)アクリル系共重合体と前記熱可塑性アクリル樹脂の配合比(紫外線架橋性部位を有しガラス転移温度が25℃以上である(メタ)アクリル系共重合体/熱可塑性アクリル樹脂)が0.0005〜1.0である、項目1〜5のいずれか一項に記載の紫外線架橋性組成物。
Claims (6)
- ガラス転移温度が25℃以上でありメチルメタクリレート単位を50質量%以上含む熱可塑性アクリル樹脂と、
紫外線架橋性部位を有しガラス転移温度が25℃以上である(メタ)アクリル系共重合体と
を含む紫外線架橋性組成物であって、前記紫外線架橋性部位が、紫外線照射により水素ラジカルを引き抜くことが可能な構造を有し、前記紫外線架橋性部位がベンゾフェノン基であり、前記ベンゾフェノン基のモル数が、前記熱可塑性アクリル樹脂と前記紫外線架橋性部位を有しガラス転移温度が25℃以上である(メタ)アクリル系共重合体の合計質量を基準として0.3〜320μmol/gである、紫外線架橋性組成物。 - 前記紫外線架橋性部位を有しガラス転移温度が25℃以上である(メタ)アクリル系共重合体が、炭素数1〜22の直鎖、分岐又は環状のアルキル基を有するアルキル(メタ)アクリレートからなる群より選択される少なくとも1つのアルキル(メタ)アクリレートと、ベンゾフェノン基を有する(メタ)アクリレートとの共重合体であり、前記ベンゾフェノン基を有する(メタ)アクリレートが、4−アクリロイルオキシベンゾフェノン、4−アクリロイルオキシエトキシベンゾフェノン、4−アクリロイルオキシ−4’−メトキシベンゾフェノン、4−アクリロイルオキシエトキシ−4’−メトキシベンゾフェノン、4−アクリロイルオキシ−4’−ブロモベンゾフェノン、4−アクリロイルオキシエトキシ−4’−ブロモベンゾフェノン、4−メタクリロイルオキシベンゾフェノン、4−メタクリロイルオキシエトキシベンゾフェノン、4−メタクリロイルオキシ−4’−メトキシベンゾフェノン、4−メタクリロイルオキシエトキシ−4’−メトキシベンゾフェノン、4−メタクリロイルオキシ−4’−ブロモベンゾフェノン、4−メタクリロイルオキシエトキシ−4’−ブロモベンゾフェノン、及びこれらの混合物からなる群より選択される、請求項1に記載の紫外線架橋性組成物。
- 前記紫外線架橋性部位を有しガラス転移温度が25℃以上である(メタ)アクリル系共重合体が、メチルメタクリレート及びベンゾフェノン基を有する(メタ)アクリレートを含むモノマー混合物の共重合体である、請求項1又は2のいずれかに記載の紫外線架橋性組成物。
- 前記紫外線架橋性部位を有しガラス転移温度が25℃以上である(メタ)アクリル系共重合体と前記熱可塑性アクリル樹脂の配合比(紫外線架橋性部位を有しガラス転移温度が25℃以上である(メタ)アクリル系共重合体/熱可塑性アクリル樹脂)が0.0005〜1.0である、請求項1〜3のいずれか一項に記載の紫外線架橋性組成物。
- 請求項1〜4のいずれか一項に記載の紫外線架橋性組成物を含む最外層を有する加飾フィルム。
- 前記最外層が三次元形状に形成されている、請求項5に記載の加飾フィルム。
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DE102009001776A1 (de) * | 2009-03-24 | 2010-09-30 | Evonik Röhm Gmbh | Zusammensetzung umfassend als wässrige Dispersion vorzugsweise Benzophenon-haltige (Meth)acrylatpolymere in Mischung mit von diesen verschiedenen (Meth)acrylatpolymeren sowie die Verwendung der Zusammensetzung |
DE102009001775A1 (de) * | 2009-03-24 | 2010-09-30 | Evonik Röhm Gmbh | (Meth)acrylatpolymere und deren Verwendung als polymergebundene UV-Initiatoren oder Zusatz zu UV-härtbaren Harzen |
JP6067964B2 (ja) | 2011-08-12 | 2017-01-25 | スリーエム イノベイティブ プロパティズ カンパニー | 放射線硬化性粘着シート |
US9034938B2 (en) * | 2012-09-12 | 2015-05-19 | Basf Se | Photoreactive polymer |
KR20150074090A (ko) * | 2012-10-19 | 2015-07-01 | 미쯔비시 레이온 가부시끼가이샤 | 광경화성 수지 조성물, 적층 시트, 적층 성형품 및 적층 성형품의 제조 방법 |
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- 2016-03-04 EP EP16713175.4A patent/EP3265310B1/en active Active
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CN107406656A (zh) | 2017-11-28 |
BR112017019006A2 (pt) | 2018-04-17 |
CA2978317A1 (en) | 2016-09-15 |
JP2016164222A (ja) | 2016-09-08 |
EP3265310B1 (en) | 2020-04-22 |
CN107406656B (zh) | 2020-12-01 |
KR20170125848A (ko) | 2017-11-15 |
WO2016144742A1 (en) | 2016-09-15 |
EP3265310A1 (en) | 2018-01-10 |
US20180022910A1 (en) | 2018-01-25 |
US10961379B2 (en) | 2021-03-30 |
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