JP5840496B2 - 高透明度のアイオノマー組成物及びそれを含む物品 - Google Patents
高透明度のアイオノマー組成物及びそれを含む物品 Download PDFInfo
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- JP5840496B2 JP5840496B2 JP2011534840A JP2011534840A JP5840496B2 JP 5840496 B2 JP5840496 B2 JP 5840496B2 JP 2011534840 A JP2011534840 A JP 2011534840A JP 2011534840 A JP2011534840 A JP 2011534840A JP 5840496 B2 JP5840496 B2 JP 5840496B2
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- FSAJWMJJORKPKS-UHFFFAOYSA-N octadecyl prop-2-enoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)C=C FSAJWMJJORKPKS-UHFFFAOYSA-N 0.000 description 1
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Description
本願は、米国特許法第120条に基づき、2008年10月31日に出願された米国仮特許出願第61/110,302号、および2008年11月25日に出願された米国仮特許出願第61/117,645号への優先権を主張しており、これらはそれぞれ、その全体が参照により本明細書に援用される。
本発明は、特定のアイオノマー組成物、およびそれから作製された物品(例えば、射出成形品)に関する。
下記実施例の各々において使用されるアイオノマーを、次のように調製した。先ず、前駆体酸コポリマー(すなわち、エチレンとメタクリル酸との未中和のコポリマー)を、断熱連続攪拌オートクレーブにおいて、以下を除き、米国特許第5,028,674号明細書の実施例1に記載される手順に実質的に従ってフリーラジカル重合により生成した:(1)エチレンとメタクリル酸の比率および開始剤の流量を制御することにより、反応器条件を、約200℃〜約260℃の温度、および170と240MPaの間の圧力で維持した;(2)(CE13以外において)プロパンテロゲンを反応器に供給しなかった;(3)反応器中のメタノールの総濃度を、エチレン、メタクリル酸、メタノールおよび開始剤溶液の総供給量に基づき(またはCE13においてはプロパンテロゲン、エチレン、メタクリル酸、メタノール、および開始剤溶液の総供給量に基づき)約2〜5mol%で維持した;(4)系を安定した状態で維持し、反応器を通って流れる材料の滞留時間を約5秒〜2分とした。また、合成されることになる個々の酸コポリマーに応じ、2つの異なるフリーラジカル開始剤、すなわちtert−ブチルペルアセテートまたはtert−ブチルペルオクトエート(peroctoate)のうちの一方を使用した。tert−ブチルペルアセテートが開始剤である場合(実施例E1、E2、E3、CE1、CE2、CE3、CE13、およびCE15などの場合)は、それを、50%濃度で無臭ミネラルスピリット中の溶液として利用した。tert−ブチルペルオクトエートが開始剤である場合(比較実施例CE4、CE5、CE6、CE7、CE8、CE9、CE10、CE11、CE12、CE14、およびCE16などの場合)は、それを、無臭ミネラルスピリット中90%濃度での混合物として利用した。アイオノマーを、溶融温度を200℃〜270℃に設定した高剪断溶融混練条件下の一軸スクリュー押出機において、または米国特許第6,518,365号明細書の実施例1に記載された一般的方法を用い、エチレンとメタクリル酸との前駆体コポリマーを水酸化ナトリウム溶液で部分的に中和することにより得た。
表1の注釈:
1. 重合工程の間、実質的に反応器の全体にわたって単一の相が維持された。
2. 積層品中間シートを形成するイオノマーを誘導するための前駆体酸コポリマーに含まれる、メタクリル酸の共重合単位の重量%。
3. 前駆体酸コポリマーの溶融流量(MFR)は、イオノマーのMFRに基づいて算出された。
4. 「%中和 (ナトリウム)」は、中和された前駆体酸コポリマーに含まれるカルボン酸基の百分率である。
5. ASTM D1238に準拠して190℃および2.16 kgで測定される場合のイオノマーの溶融流量(MFR)。
6. 「n.d.」は、ASTM D3418-03に準拠して測定される場合に、凍結エンタルピーが検出不可能であることを意味する。
実施例4および比較実施例CE17において、それぞれ実施例E3および比較実施例CE2において使用されたアイオノマーを、次のように射出成形して、125×75×3mm(薄い試験片)または125×45×20mm(厚い試験片)の寸法を有する長方形の試験片にした。樹脂を、Model 150−6 HPM射出成形機(Taylor’s Industrial Services,(Mount Gilead,OH))中に供給した。アイオノマーの溶融温度は130℃〜200℃の範囲内であり、金型温度を約10℃の温度で維持した。成形サイクル時間は、およそ90秒であった。これらの「空冷」試験片、成形試験片を金型から取り出し、その成形試験片を周囲条件下で室温(約22±3℃)まで冷却させることにより得た。
本発明に従うアイオノマー組成物および先行技術アイオノマーの凍結エンタルピーを、上記の方法に従ってDSCにより測定した。図1は、比較実施例CE18の結果を示している。具体的には、図1は先行技術アイオノマーのDSCトレースであり、アイオノマー試料の熱の流入および流出に対応するピークを明確に示している。これらのピークを積分すると、その材料の凍結エンタルピーまたは結晶化エネルギーが得られる。図2は、実施例E5の結果を示している。具体的には、図2は本明細書に記載されるナトリウムアイオノマーのDSCトレースである。図1に示された結果とは異なり、図2中のDSCトレースは、本明細書に記載されるナトリウムアイオノマーが、ごく小さな、または検出不可能な凍結エンタルピーを有することを示している。
次に、本発明の態様を示す。
1. 前駆体酸コポリマーの中和生成物であるアイオノマーを含むアイオノマー組成物であって:
(A)前記前駆体酸コポリマーは、2〜10個の炭素原子を有するα−オレフィンの共重合単位と、前記前駆体酸コポリマーの総重量に基づき約20〜約30重量%の、3個〜8個の炭素原子を有するα,β−エチレン性不飽和カルボン酸の共重合単位とを含み;
(B)前記前駆体酸コポリマーは、約10〜約4000g/10分のメルトフローレートを有し;そして
(C)前記前駆体酸コポリマーは、約40%〜約90%のレベルまで中和され、かつナトリウムカチオンから実質的になる対イオンを含む場合、ナトリウムアイオノマーを生成し、前記ナトリウムアイオノマーは、約0.7〜約25g/10分のメルトフローレート、およびASTM D3418に準拠して示差走査熱分析により測定される場合に検出不可能な、または約3.0j/g未満の凍結エンタルピーを有する
アイオノマー組成物。
2. 前記前駆体酸コポリマーが、約100〜約500g/10分のメルトフローレートを有するか;または前駆体酸コポリマーが、約20〜約25重量%の、前記α,β−エチレン性不飽和カルボン酸の共重合単位を含むか;または前記前駆体酸コポリマー中に存在する約40%〜約70%のカルボン酸基が、ナトリウムイオン含有塩基によって中和されているか;または前記アイオノマーが、約1〜約10g/10分のメルトフローレートを有するか;または前記アイオノマーが、検出不可能な凍結エンタルピーを有する、上記1に記載のアイオノマー組成物。
3. 酸コポリマーであって、
(A)2個〜10個の炭素原子を有するα−オレフィンの共重合単位と、前記酸コポリマーの総重量に基づき約20〜約30重量%の、3個〜8個の炭素原子を有するα,β−エチレン性不飽和カルボン酸の共重合単位とを含み;
(B)前記酸コポリマーは、約10〜約4000g/10分のメルトフローレートを有し;そしてさらに
(C)前記酸コポリマーは、約40%〜約90%のレベルまで中和され、かつナトリウムカチオンから実質的になる対イオンを含む場合、ナトリウムアイオノマーを生成し、前記ナトリウムアイオノマーは、約0.7〜約25g/10分のメルトフローレート、およびASTM D3418に準拠して示差走査熱分析により測定される場合に検出不可能な、または約3.0j/g未満の凍結エンタルピーを有する
酸コポリマー。
4. 上記1に記載のアイオノマー組成物もしくは上記3に記載の前駆体酸コポリマーを含む、または上記1に記載のアイオノマー組成物もしくは上記3に記載の前駆体酸コポリマーから製造された物品。
5. 前記物品が、浸漬被覆、溶液流延、積層、溶融押出、ブローンフィルム、押出被覆、およびタンデム押出被覆からなる群より選択される方法により製造されたフィルムもしくはシートである;または前記物品が、圧縮成形、射出成形、押出成形、吹込成形、同時射出成形;オーバーモールド成形;射出吹込成形;射出延伸吹込成形、および押出吹込成形からなる群より選択される方法によって製造された成形品である、上記4に記載の物品。
6. 前記物品が、前記アイオノマー組成物を含むか、もしくは前記アイオノマー組成物から製造される、少なくとも約1mmの最小厚さを有する射出成形品である;または前記物品が、多層構造を有する射出成形品であり、前記多層構造の少なくとも1層が、前記アイオノマー組成物を含むか、もしくは前記アイオノマー組成物から製造され、前記少なくとも1層が、少なくとも約1mmの最小厚さを有する、上記4または5に記載の物品。
7. 前記物品が、シート、容器、キャップもしくはストッパー、トレー、医療用デバイスもしくは器具、ハンドル、ノブ、押ボタン、装飾用品、パネル、コンソールボックス、または履物部材である、上記4〜6のいずれか1項に記載の物品。
8. 上記1に記載のアイオノマー組成物から実質的になり、約1〜約100mmの厚さを有する、射出成形により調製された物品。
9. 前記物品が、オーバーモールド成形により製造され、前記アイオノマーが、約0.75〜約35g/10分のメルトフローレートを有するか;または前記物品が、射出吹込成形、射出延伸吹込成形もしくは押出吹込成形により製造され;前記前駆体酸コポリマーが、約200〜約500g/10分のメルトインデックスを有し;かつ前記アイオノマーが、約0.75〜約35g/10分のメルトフローレートを有する、上記5に記載の物品。
Claims (8)
- 酸コポリマーであって、
(A)エチレン単位と、前記酸コポリマーの総重量に基づき20〜30重量%の、アクリル酸及びメタクリル酸からなる群から選ばれるα,β−エチレン性不飽和カルボン酸の共重合単位とを含み;
(B)前記酸コポリマーは、ASTM法D1238に準拠して190℃にて2.16kg荷重下で測定される場合に、10〜4000g/10分のメルトフローレートを有し;そしてさらに
(C)前記酸コポリマーは、前記酸コポリマー中に存在するカルボン酸基の総数を基準として40%〜90%のレベルまで中和されて、カルボキシレート基とナトリウムカチオンから実質的になる対イオンを含むナトリウムアイオノマーを生成し、前記ナトリウムアイオノマーは、0.7〜25g/10分のメルトフローレート、およびASTM D3418に準拠して示差走査熱分析により測定される場合に検出不可能な、または3.0j/g未満の凍結エンタルピーを有する
酸コポリマー。 - 請求項1の酸コポリマーの中和生成物であるアイオノマーを含むアイオノマー組成物。
- 酸コポリマーが、100〜500g/10分のメルトフローレートを有する請求項2のアイオノマー組成物。
- 酸コポリマーが、20〜25重量%の、前記α,β−エチレン性不飽和カルボン酸の共重合単位を含む請求項2のアイオノマー組成物。
- 酸コポリマー中に存在する40%〜70%のカルボン酸基が、ナトリウムイオン含有塩基によって中和されている請求項2のアイオノマー組成物。
- アイオノマーが、1〜10g/10分のメルトフローレートを有する請求項2のアイオノマー組成物。
- アイオノマーが、検出不可能な凍結エンタルピーを有する請求項2のアイオノマー組成物。
- 請求項2〜7のいずれか1項記載のアイオノマー組成物を含有する物品。
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US11764508P | 2008-11-25 | 2008-11-25 | |
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PCT/US2009/062927 WO2010051523A1 (en) | 2008-10-31 | 2009-11-02 | High-clarity ionomer compositions and articles comprising the same |
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JP2015166477A (ja) * | 2008-10-31 | 2015-09-24 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニーE.I.Du Pont De Nemours And Company | 高透明度のアイオノマー組成物及びそれを含む物品 |
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KR101641397B1 (ko) | 2016-07-20 |
KR20110082586A (ko) | 2011-07-19 |
EP2342239A4 (en) | 2012-07-11 |
WO2010051523A1 (en) | 2010-05-06 |
US8399096B2 (en) | 2013-03-19 |
CN102203143B (zh) | 2014-05-07 |
AU2009308728B2 (en) | 2016-02-04 |
CN102203143A (zh) | 2011-09-28 |
JP2015166477A (ja) | 2015-09-24 |
EP2342239B1 (en) | 2020-04-15 |
EP2342239A1 (en) | 2011-07-13 |
JP2012507611A (ja) | 2012-03-29 |
US20100112253A1 (en) | 2010-05-06 |
AU2009308728A1 (en) | 2010-05-06 |
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