JP7391870B2 - 天然油によるポリ乳酸のエステル交換反応からのポリエステルを使用したラミネート接着剤 - Google Patents
天然油によるポリ乳酸のエステル交換反応からのポリエステルを使用したラミネート接着剤 Download PDFInfo
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- JP7391870B2 JP7391870B2 JP2020554471A JP2020554471A JP7391870B2 JP 7391870 B2 JP7391870 B2 JP 7391870B2 JP 2020554471 A JP2020554471 A JP 2020554471A JP 2020554471 A JP2020554471 A JP 2020554471A JP 7391870 B2 JP7391870 B2 JP 7391870B2
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- laminate
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Description
本明細書で使用される場合、%は、特に明記されていない限り、重量によるものである。本明細書で使用される場合、分子量は、特に明記しない限り、数平均分子量(Mn)を指す。本明細書で使用される場合、mgはミリグラムを意味し、gはグラムを意味する。molはモルを意味する。mmolはミリモルを意味する。mlはミリリットルを意味し、Lはリットルを意味する。gaはゲージを意味する。「OH数」という用語は、ポリマーのヒドロキシル価を意味し、遊離ヒドロキシル基を含む試験ポリマー1gのアセチル化に取り込まれた酢酸を中和するのに必要な水酸化カリウムのmg数として定義される。室温は、室内の周囲湿度で20~25℃である。
成分Aは、1分子あたり2以上の末端イソシアネート基を有する少なくとも1つの化合物を含む。イソシアネート基は通常、遊離の-NCO基であるが、ブロックまたはマスクされた-NCO基にすることもできる。一実施形態では、成分Aは、1以上のポリイソシアネートを使用して調製される。成分Aが1以上のポリイソシアネートを含むことができるか、1以上のポリイソシアネートの反応生成物を含むことができるか、または両方を含むことができることを示すことから調製される。成分Aの一実施形態は、1以上のイソシアネート官能化ポリウレタンプレポリマーを使用する。本開示の文脈において、ポリウレタンプレポリマーは、例えば、ポリオール成分(または他の活性水素官能化化合物)と、少なくとも2つの官能性を有する少なくとも1つのポリイソシアネートとの反応から生じるような化合物である。「ポリウレタンプレポリマー」という用語は、例えば、ポリオールと過剰のポリイソシアネートとの反応から形成されるような比較的低分子量を有する化合物だけでなく、オリゴマーまたはポリマー化合物も包含する。同様に、「ポリウレタンプレポリマー」という用語に含まれるのは、例えば、3価または4価のポリオールと、ポリオールと比較してモル過剰のポリイソシアネートとの反応から形成される化合物である。
成分Bは、高分子ポリ乳酸と天然油とのエステル交換生成物を含む。 いくつかの実施形態では、成分Bは、高分子ポリ乳酸と天然油および異なるポリオールとのエステル交換生成物を含むポリオールの混合物を含む。いくつかの実施形態では、成分Bは、高分子ポリ乳酸と天然油とのエステル交換生成物、異なるポリオール、および高OH官能性ポリオール生成物を含むポリオールの混合物を含む。
DEG ジエチレングリコール。
PLA ポリ乳酸ポリマーMn85000ダルトンは、NatureworksLLCから3052Dとして入手できる。
DorfKetalからTyzorTPTとして入手可能なチタン(IV)ブトキシド触媒。
EagleSpecialtyProductsのT31オイルから入手可能なヒマシ油。
フラーP-Aは、H.B.フラーから入手可能なイソシアネート機能性材料である。Liofol LA 3817、約2.8%の%NCOを有する酢酸エチル溶媒中に80重量%の固形分を含む溶媒ベースのイソシアネート官能性材料であり、Henkel Corporationから入手可能である。
Liofol LA 7660、約16%の%NCOを有するイソシアネート機能性材料であり、Henkel Corporationから入手可能である。
Liofol LA 7773、約16%の%NCOを有するイソシアネート官能性材料であり、Henkel Corporationから入手可能である。
ポリエチレンテレフタレート(PET GP)は、食品包装のラミネーションの外層に使用される典型的な48gaのポリエステルフィルムである。アルミホイルなどの堅牢性の低いフィルムのサポートとして機能する。多くの場合、包装の内部に面する側に印刷される。
PET Metは、真空蒸着によるアルミニウムの非常に薄い層を備えた48ゲージのポリエステルである。
PET-Foilは、溶剤ベースの市販の接着剤で0.0035gaのアルミホイルにラミネートされた48ゲージのポリエステルである。
RLS OPPは、約75ゲージの配向ポリプロピレンフィルムである。
High Slip PEは、取り扱い性を高めるために、エルカミドなどのスリップ剤を約1000ppm含むポリエチレンフィルムである。市場で一般的に使用されているさまざまな厚さ(1ミルと2ミル)が含まれる。
低密度ポリエチレン(LDPE)は、密度が約0.910~約0.925g/cm3のエチレンのホモポリマーである。
ラミネートの組み合わせ1は、PET GP(48 ga)/接着剤/ハイスリップPEE(2 mil)1000ppmである。
ラミネートの組み合わせ2は、PET GP(48 ga)/接着剤/LDPE(1mil)である。
ラミネートの組み合わせ3は、PET Met(48 ga)/接着剤/ハイスリップPE(2 mil)1000ppmである。
ラミネートの組み合わせ4は、RLS OPP(75 ga)/接着剤/RLS OPP(75 ga)である。
ラミネートの組み合わせ5は、PET-ホイル/接着剤/ハイスリップPE(2 mil)1000ppmである。
ラミネートは、Nordmeccanica Labo Combiを使用して調製し、調製した各接着剤を約1.2ポンド/リームのコーティング重量でコーティングした。
伸び-E;テスト中に一方または両方の基板が伸びたとき。
SF-在庫失敗;一方または両方のラミネートフィルムが失敗。
P-ピール;ラミネートが、2つの基板のどちらも裂けたり壊れたりすることなく、テストストリップの全長を分離できる場合。
SS-株式分割;テストストリップの最初の1インチの後で、2つの基板のいずれかが故障した場合。
MT-メタルトランスファー;金属化層は元の金属化フィルムから剥がれ、他のフィルムに結合したままになる。
Z-ジッパー;故障が交互に高強度、低強度、高強度、低強度モードを持っている場合。
P-MT-皮と金属の転写;
P/E-N-ピールと伸びネック;
P/E/N-SS-剥離および伸長ネックとストックスプリット
P/Z-ピールとジッパー
丸底フラスコは、温度計、機械的攪拌機、還流冷却器および窒素注入口を備えている。フラスコに、104gのジエチレングリコール(DEG)と555gの高分子量PLAポリマーを入れた。チタン(IV)ブトキシドを最初に0.1g/mLとしてイソプロパノールに溶解し、次にこのチタン(IV)ブトキシド溶液2mLをフラスコに加えた。反応物を撹拌しながら150~165℃に加熱した。混合物が完全に溶けたら、155gのヒマシ油をフラスコに加え、温度を170~180℃に上げて3時間保持した。混合物の温度を190~200℃に上げ、4時間保持した。混合物の温度をさらに210~220℃に上げ、7時間または透明で均質な混合物が得られるまでそこに保持した。
丸底フラスコには、温度計、機械的攪拌機、還流冷却器、窒素注入口が備えられている。フラスコに、156gのジプロピレングリコール(DPG)と509gの高分子量PLAポリマーを入れた。チタン(IV)ブトキシドを最初に0.1g/mLとしてイソプロパノールに溶解し、次にこのチタン(IV)ブトキシド溶液2mLをフラスコに加えました。反応物を撹拌しながら150~165℃に加熱した。混合物が完全に溶けたら、134gの大豆油をフラスコに加え、温度を170~180℃に上げて3時間保持した。混合物の温度を190~200℃に上げ、4時間保持した。混合物の温度をさらに210~220℃に上げ、7時間または透明で均質な混合物が得られるまでそこに保持した。温度が50℃に下がると、加熱を停止し、エステル交換反応生成物を排出した。これがサンプル2である。
ポリプロピレングリコール(1025価の平均分子量;ヒドロキシルに基づいて2当量;全反応混合物の72重量%)をアジピン酸(カルボキシルに基づいて4当量;全反応混合物の27重量%)と単独で、238℃で反応させた。反応混合物を160℃に冷却し、次にグリセロール(ヒドロキシルに基づいて6当量;全反応混合物の13重量%)を加え、230℃で反応させた。次に、反応生成物を乾燥させた。これがサンプル3である。
イソシアネート官能成分A1としてロックタイトリオフォールLA7773を使用した。エステル交換ポリエステルポリオールサンプル1の80重量%、および20重量%の高官能性ポリエーテルポリオールサンプル3は、均一に混合された。これがポリオール成分B1である。
イソシアネート官能成分A2としてロックタイトLiofolLA3817を使用した。
イソシアネート官能成分A3としてロックタイトリオフォールLA7660を使用した。
イソシアネート官能成分A3としてロックタイトリオフォールLA7660を使用した。
イソシアネート官能成分A1としてロックタイトリオフォールLA 7773を使用した。
イソシアネート官能成分A1として、ロックタイトリオフォールLA 7773を使用した。
製品の耐性は、9日間と16日間硬化したラミネートAd6-1のサンプルから作られた袋を使用して試験した。次の表に結果を示した。
比較ポリオール成分1(PC-1)は、Ostlundらの米国特許公開第2017/0002240号のポリオール成分1について記載されているように調製した。サンプル1a、サンプル2、およびPC-1のOH数、酸数、および粘度を試験し、その結果を以下に示した。
比較接着剤AdPC-1を形成するために、1.25/1のNCO/OH当量比で、比較のポリオール成分1 PC-1と、8重量部のフラーPA対10重量部のPC-1の比でイソシアネート官能性成分である市販のフラーPAを組み合わせた。ラミネートは、1.21lbs./reamのコーティング重量、45℃の塗布温度、およびラミネートの組み合わせ1(PET GP/接着剤/ハイスリップPE)でのニップ温度60℃を使用して調製した。PET GPフィルムに接着剤を塗布し、これにハイスリップPEフィルムをラミネートした。これが比較サンプルPC-1-1である。比較の積層サンプルは室温で硬化され、その後サンプルが試験された。
製品の耐性は、15日間(AdPC-1-1)、16日間(Ad6-1)または17日間(Ad1-1)硬化したラミネートAd1-1、Ad6-1、およびAdPC-1-1のサンプルから作製された袋を使用して試験した。次の表にその結果を示した。
Claims (16)
- イソシアネート官能性成分と反応して二成分積層接着剤を形成するためのイソシアネート反応性成分であって、高分子ポリ乳酸と少なくとも1つの天然油を含む反応混合物のエステル交換生成物、および少なくとも2つの一級ヒドロキシル基および少なくとも2つの二級ヒドロキシル基を有する高OH官能性ポリオール生成物を含む、イソシアネート反応性成分。
- 反応混合物が、高分子ポリ乳酸、少なくとも1つの天然油、および50~2000ダルトンの分子量を有するジオールを含む、請求項1に記載のイソシアネート反応性成分。
- 反応混合物が、反応混合物の総重量に基づいて50~85重量%の量で存在するポリ乳酸、反応混合物の総重量に基づいて13~30重量%の量で存在する少なくとも1つの天然油、反応混合物の総重量に基づいて2~36重量パーセントの量で存在するジオール、および任意でエステル交換触媒を含む、請求項1または2に記載のイソシアネート反応性成分。
- 少なくとも70%の範囲の再生可能含有量を有する、請求項1~3のいずれか1項に記載のイソシアネート反応性成分。
- 25℃での粘度が3000~20000cpsである、請求項1~4のいずれか1項に記載のイソシアネート反応性成分。
- 天然油がヒマシ油および/または大豆油である、請求項1~5のいずれか1項に記載のイソシアネート反応性成分。
- 成分Aおよび成分Bを含み、1分子あたり2以上の末端イソシアネート基を有するイソシアネート官能化化合物を含む成分A、および請求項1~6のいずれか1項に記載のイソシアネート反応性成分を含む成分Bとを含有する、柔軟性包装材料を積層するための二成分接着剤。
- イソシアネート官能化化合物が、1以上のポリイソシアネートを使用して調製される、請求項7に記載の二成分接着剤。
- イソシアネート官能化化合物が、ジフェニルメタンジイソシアネート、ジフェニルメタンジイソシアネートの改質バージョン、およびそれらの組み合わせを使用して調製される、請求項7に記載の二成分接着剤。
- イソシアネート官能化化合物が、少なくとも1つのポリオールと過剰のポリイソシアネートとのポリウレタンプレポリマー反応生成物を含む、請求項7に記載の二成分接着剤。
- 請求項7~10のいずれか1項に記載の二成分接着剤の硬化反応生成物。
- 200g/インチの最小室温結合強度を有する、請求項7~10のいずれか1項に記載の二成分接着剤の硬化反応生成物。
- 400g/インチの最小室温結合強度を有する、請求項7~10のいずれか1項に記載の二成分接着剤の硬化反応生成物。
- 第一のフィルム表面と第二のフィルム表面との間に配置された、請求項7~10のいずれか1項に記載の二成分接着剤を含む柔軟性ラミネート。
- 第一のフィルム表面と第二のフィルム表面との間に配置された、請求項7~10のいずれか1項に記載の二成分接着剤の硬化反応生成物を含む柔軟性ラミネート。
- 柔軟性ラミネートの層の間に配置された食品を含む食品容器であって、柔軟性ラミネートは、隣接するフィルムを結合する請求項7~10のいずれか1項に記載の二成分接着剤の硬化反応生成物を含む、食品容器。
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