JP6536757B2 - 反応性ホットメルト樹脂用剥離剤 - Google Patents
反応性ホットメルト樹脂用剥離剤 Download PDFInfo
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- JP6536757B2 JP6536757B2 JP2018565073A JP2018565073A JP6536757B2 JP 6536757 B2 JP6536757 B2 JP 6536757B2 JP 2018565073 A JP2018565073 A JP 2018565073A JP 2018565073 A JP2018565073 A JP 2018565073A JP 6536757 B2 JP6536757 B2 JP 6536757B2
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- hot melt
- melt resin
- reactive hot
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- release agent
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- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
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Description
<ウレタンプレポリマー(1)の合成>
温度計、撹拌機、不活性ガス導入口および還流冷却器を備えた四口フラスコに、ポリプロピレングリコール(数平均分子量;1,000)15質量部、ポリプロピレングリコール(数平均分子量;2,000)15質量部、結晶性ポリエステルポリオール(1,6−ヘキサンジオールとアジピン酸を反応させたもの、数平均分子量;2,000)10質量部、結晶性ポリエステルポリオール(1,6−ヘキサンジオールと1,12−ドデカンジカルボン酸とを反応させたもの、数平均分子量;3,500)10質量部、非晶性ポリエステルポリオール(ビスフェノールAのプロピレンオキサイド6モル付加物、セバシン酸及びイソフタル酸を反応させたもの、数平均分子量;2,000)15質量部、アクリルポリオール(アクリル酸ブチル/メタクリル酸メチル/アクリル酸エチル/メタクリル酸2−ヒドロキシエチル=69.65/25/5/0.35(質量比)で反応させたもの、数平均分子量;13,000、ガラス転移温度;−30.3℃)2.5質量部を仕込み、減圧条件下で水分含有率が0.05質量%以下となるまで脱水した。
次いで、容器内温度70℃に冷却後、4,4’−ジフェニルメタンジイソシアネート16.5質量部を加え、100℃まで昇温して、イソシアネート基含有率が一定となるまで約3時間反応させて、イソシアネート基を有するウレタンプレポリマー(1)を得た。なお、得られたウレタンプレポリマー(1)の分散項(δD):17.7、分極項(δP):5.6、水素結合項(δH):5.3であった。また、ウレタンプレポリマー(1)のウレタン結合の含有量は0.90mol/kgであった。
カラム:東ソー株式会社製の下記のカラムを直列に接続して使用した。
「TSKgel G5000」(7.8mmI.D.×30cm)×1本
「TSKgel G4000」(7.8mmI.D.×30cm)×1本
「TSKgel G3000」(7.8mmI.D.×30cm)×1本
「TSKgel G2000」(7.8mmI.D.×30cm)×1本
検出器:RI(示差屈折計)
カラム温度:40℃
溶離液:テトラヒドロフラン(THF)
流速:1.0mL/分
注入量:100μL(試料濃度0.4質量%のテトラヒドロフラン溶液)
標準試料:下記の標準ポリスチレンを用いて検量線を作成した。
東ソー株式会社製「TSKgel 標準ポリスチレン A−500」
東ソー株式会社製「TSKgel 標準ポリスチレン A−1000」
東ソー株式会社製「TSKgel 標準ポリスチレン A−2500」
東ソー株式会社製「TSKgel 標準ポリスチレン A−5000」
東ソー株式会社製「TSKgel 標準ポリスチレン F−1」
東ソー株式会社製「TSKgel 標準ポリスチレン F−2」
東ソー株式会社製「TSKgel 標準ポリスチレン F−4」
東ソー株式会社製「TSKgel 標準ポリスチレン F−10」
東ソー株式会社製「TSKgel 標準ポリスチレン F−20」
東ソー株式会社製「TSKgel 標準ポリスチレン F−40」
東ソー株式会社製「TSKgel 標準ポリスチレン F−80」
東ソー株式会社製「TSKgel 標準ポリスチレン F−128」
東ソー株式会社製「TSKgel 標準ポリスチレン F−288」
東ソー株式会社製「TSKgel 標準ポリスチレン F−550」
前記ウレタンプレポリマー(1)を110℃に加熱溶融させて、110℃に加熱された直径0.4mmの内径を有するディスペンサーニードル(武蔵エンジニアリング株式会社製ディスペンサー「VAVE MASTER ME−5000VT」)を用いて、吐出圧力:0.3MPa、加工速度50mm/秒にて、PET(ポリエチレンテレフタレート)フィルム(13cm×15cm、厚さ50μm)上に、1辺10cmの直線を0.2mm厚さになるように塗布して、温度23℃、相対湿度65%の恒温恒湿槽中に3日間放置することにより、積層体を得た。
得られた積層体のPETフィルム/接着剤層面に対し、テトラヒドロフルフリルアルコール100質量%の剥離剤を、綿棒を用いて塗布、23℃の雰囲気下で5分間放置し、直線の先端をピンセットで剥離した後、普及型デジタルフォースゲージ(株式会社イマダ製「DS2−200N」)に固定し、剥離強度(N)を測定することで剥離性試験を行った。なお、剥離剤を塗布する前の積層体の剥離性試験も併せて行った。
剥離剤の種類を表1〜2に示す通りに変更した以外は、実施例1と同様にして剥離性試験を行った。
Claims (2)
- ハンセン溶解度パラメーターにおける分散項(δD)が14.0〜21.0MPa0.5の範囲であり、双極子間力項(δP)が0〜10.5MPa0.5の範囲であり、水素結合項(δH)が0〜13.5MPa0.5の範囲である反応性ホットメルト樹脂用剥離剤であり、
前記反応性ホットメルト樹脂が、イソシアネート基を有するウレタンプレポリマーを含有する湿気硬化型ホットメルト樹脂であり、
前記反応性ホットメルト樹脂用剥離剤が、安息香酸エステル、テトラヒドロフルフリルアルコール、及び、テトラヒドロフルフリル(メタ)アクリレートから成る群より選ばれる1種以上の溶剤であることを特徴とする反応性ホットメルト樹脂用剥離剤。 - 前記ウレタンプレポリマーにおけるウレタン結合の含有量が0.1〜3mol/kgの範囲である請求項1記載の反応性ホットメルト樹脂用剥離剤。
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US4830772A (en) * | 1988-06-10 | 1989-05-16 | Hoechst Celanese Corporation | Stripper composition for removal of protective coatings |
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JP2005133053A (ja) * | 2003-10-29 | 2005-05-26 | Hitachi Kasei Polymer Co Ltd | グラビアロール上の湿気硬化型反応性ホットメルト接着剤の除去方法 |
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