JP5527881B2 - 感圧接着剤組成物、感圧接着剤層及び感圧接着性積層体 - Google Patents
感圧接着剤組成物、感圧接着剤層及び感圧接着性積層体 Download PDFInfo
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- JP5527881B2 JP5527881B2 JP2009273990A JP2009273990A JP5527881B2 JP 5527881 B2 JP5527881 B2 JP 5527881B2 JP 2009273990 A JP2009273990 A JP 2009273990A JP 2009273990 A JP2009273990 A JP 2009273990A JP 5527881 B2 JP5527881 B2 JP 5527881B2
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Description
本発明の感圧接着剤組成物は、リン酸エステル基を有する(メタ)アクリル酸エステル(A)(以下、「単量体(A)」という)からなる繰返しユニットと、炭素数1〜18のアルキル基を有する(メタ)アクリル酸エステル(B)(以下、「単量体(B)」という)からなる繰返しユニットと、(A)及び(B)と共重合可能であるアミン系化合物、ジメチル(メタ)アクリルアミド、アクリロイルモルフォリンからなる群から選択される少なくとも1つ(C)(以下、「単量体(C)」という)からなる繰返しユニットと、を含む(メタ)アクリル酸エステル系重合体からなるものである。
本発明の感圧接着剤層は、上述した感圧接着剤組成物の架橋物からなるものである。
本発明の感圧接着性積層体は、基材の少なくとも片面に、本発明の感圧接着剤層を有するものである。ここでいう基材は、ベース基材の他、剥離シートを含むものである。
攪拌機、還流冷却器、窒素導入口、及び温度計を取り付けた反応容器に、単量体(B)として、アクリル酸n−ブチル47質量部及びアクリル酸2−ヒドロキシエチル3質量部、単量体(A)として、メタクリロイルオキシエチルジフェニルホスフェート(大八化学工業製:MR−260)50質量部、単量体(C)として、ジメチルアミノエチルメタクリレート0.5質量部、重合開始剤としてアゾビスイソブチロニトリル0.3質量部、溶媒として酢酸エチル150質量部を投入し、常温で1時間かけて窒素置換をした(単量体(A):単量体(B):単量体(C)=49.8質量%:49.8質量%:0.4質量%)。その後、70℃に昇温し、8時間重合を行った。得られた重合体をGPC(ポリスチレン換算)にて分子量測定を行ったところ、重量平均分子量(Mw)が600,000であった。
ジメチルアミノエチルメタクリレートの量を10質量部とした以外は、実施例1と同様にして感圧接着性積層体を作製した(単量体(A):単量体(B):単量体(C)=45.5質量%:45.5質量%:9質量%)。
ジメチルアミノエチルメタクリレートの代わりに、ジメチルアクリルアミド0.5質量部用いた以外は実施例1と同様にして、感圧接着性積層体を作製した(単量体(A):単量体(B):単量体(C)=49.8質量%:49.8質量%:0.4質量%)。
ジメチルアミノエチルメタクリレートの代わりに、アクリロイルモルフォリン0.5質量部用いた以外は実施例1と同様にして、感圧接着性積層体を作製した(単量体(A):単量体(B):単量体(C)=49.8質量%:49.8質量%:0.4質量%)。
メタクリロイルオキシエチルジフェニルホスフェートを30質量部とし、ジメチルアミノエチルメタクリレートの代わりに、アクリロイルモルフォリンを15質量部用いた以外は実施例1と同様にして、感圧接着性積層体を作製した(単量体(A):単量体(B):単量体(C)=31.6質量%:52.6質量%:15.8質量%)。
ジメチルアミノエチルメタクリレートの代わりに、ペンタメチルピペリジルメタクリレート(日立化成工業社製:FA−711MM)0.5質量部用いた以外は実施例1と同様にして、感圧接着性積層体を作製した(単量体(A):単量体(B):単量体(C)=49.8質量%:49.8質量%:0.4質量%)。
アクリル酸n−ブチルの代わりにアクリル酸2−エチルヘキシル47質量部を用いた以外は実施例1と同様にして、感圧接着性積層体を作製した(単量体(A):単量体(B):単量体(C)=49.8質量%:49.8質量%:0.4質量%)。
PETフィルムの代わりに厚み25μmのポリイミド(PI)フィルム(東レ・デュポン社製:カプトン100H)を用いた以外は実施例1と同様にして、感圧接着性積層体を作製した。
PETフィルムの代わりに厚み25μmのポリイミド(PI)フィルム(東レ・デュポン社製:カプトン100H)を用いた以外は実施例2と同様にして、感圧接着性積層体を作製した。
PETフィルムの代わりに厚み25μmのポリイミド(PI)フィルム(東レ・デュポン社製:カプトン100H)を用いた以外は実施例3と同様にして、感圧接着性積層体を作製した。
PETフィルムの代わりに厚み25μmのポリイミド(PI)フィルム(東レ・デュポン社製:カプトン100H)を用いた以外は実施例4と同様にして、感圧接着性積層体を作製した。
PETフィルムの代わりに厚み25μmのポリイミド(PI)フィルム(東レ・デュポン社製:カプトン100H)を用いた以外は実施例5と同様にして、感圧接着性積層体を作製した。
PETフィルムの代わりに厚み25μmのポリイミド(PI)フィルム(東レ・デュポン社製:カプトン100H)を用いた以外は実施例6と同様にして、感圧接着シートを作製した。
PETフィルムの代わりに厚み25μmのポリイミド(PI)フィルム(東レ・デュポン社製:カプトン100H)を用いた以外は実施例7と同様にして、感圧接着シートを作製した。
攪拌機、還流冷却器、窒素導入口、及び温度計を取り付けた反応容器にアクリル酸n−ブチル45質量部、アクリル酸2−エチルヘキシル50質量部、アクリル酸3質量部、アクリル酸2−ヒドロキシエチル2質量部、アゾビスイソブチロニトリル0.3質量部、酢酸エチル150質量部を投入し、1時間かけて窒素置換をした。その後、60℃に昇温し8時間重合を行った。得られた重合体のMwは600,000であった。
リン酸エステル系難燃剤を20質量部とした以外は比較例1と同様にして、感圧接着性積層体を作製した。
ジメチルアミノエチルメタクリレートを使用しない以外は、実施例1と同様にして、感圧接着性積層体を作製した。
PETフィルムの代わりに厚み25μmのポリイミド(PI)フィルム(東レ・デュポン社製:カプトン100H)を用いた以外は、比較例1と同様に感圧接着性積層体を作製した。
PETフィルムの代わりに厚み25μmのポリイミド(PI)フィルム(東レ・デュポン社製:カプトン100H)を用いた以外は、比較例2と同様に感圧接着性積層体を作製した。
PETフィルムの代わりに厚み25μmのポリイミド(PI)フィルム(東レ・デュポン社製:カプトン100H)を用いた以外は、比較例3と同様に感圧接着性積層体を作製した。
燃焼性試験は、感圧接着性積層体の剥離フィルムを剥離し、アンダーライターズラボラトリーズ社発行のプラスチック材料の燃焼性試験規格UL94の垂直燃焼試験方法に基づいてUL94VTMランクを判定した。
感圧接着性積層体を、23℃×50%RH、及び70℃×Dry5日間促進後のSUS板に対する粘着力をJIS Z 0237に準拠して測定した。そして、その粘着力の変化率を算出した。なお、感圧接着性積層体の粘着力の変化率が、20%未満であった場合を○、20〜50%であった場合を△、50%以上を×として評価した。
感圧接着性積層体の剥離フィルムを剥離し、PETフィルムを基材とした感圧接着性積層体の感圧接着剤層のヘイズ値を可視光透過率測定装置(日本電色工業株式会社製;ヘイズメーターNDH2000)を使用し、JIS K 7136規格に準拠して測定した。なお、光線入射面は、感圧接着剤層面とした。
ベース基材としてPETフィルムを用いた実施例1〜7の感圧接着性積層体は、難燃性評価判定がVTM−2であり、難燃性に優れるものであり、粘着力の変化率が20%未満であった。また、ヘイズ値は1.5%以下であり、透明性に優れたものであった。
Claims (5)
- リン酸エステル基を有する(メタ)アクリル酸エステル(A)からなり下記一般式(1)で表される繰返しユニットと、
炭素数1〜18のアルキル基を有する(メタ)アクリル酸エステル(B)からなる繰返しユニットと、
前記(A)及び前記(B)と共重合可能であるアミン系化合物、ジメチル(メタ)アクリルアミド、アクリロイルモルフォリンからなる群から選択される少なくとも1つ(C)からなる繰返しユニットと、
を含む(メタ)アクリル酸エステル系重合体を含むことを特徴とする感圧接着剤組成物。
- 前記(メタ)アクリル酸エステル系重合体は、前記(A)を31.6〜94.9質量%、前記(B)を5〜70質量%、前記(C)を0.1〜20質量%用いて共重合させたものであることを特徴とする請求項1に記載の感圧接着剤組成物。
- 前記(C)がジメチルアクリルアミド又はペンタメチルピペリジルメタクリレートであることを特徴とする請求項1又は2に記載の感圧接着剤組成物。
- 請求項1〜3の何れか一項に記載の感圧接着剤組成物の架橋物からなる感圧接着剤層。
- 基材の少なくとも片面に請求項4に記載の感圧接着剤層を有することを特徴とする感圧接着性積層体。
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