JP2021191860A - 熱可塑性ポリウレタンフィルムおよびその製造方法 - Google Patents
熱可塑性ポリウレタンフィルムおよびその製造方法 Download PDFInfo
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- JP2021191860A JP2021191860A JP2021134436A JP2021134436A JP2021191860A JP 2021191860 A JP2021191860 A JP 2021191860A JP 2021134436 A JP2021134436 A JP 2021134436A JP 2021134436 A JP2021134436 A JP 2021134436A JP 2021191860 A JP2021191860 A JP 2021191860A
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- thermoplastic polyurethane
- polyurethane resin
- polyurethane film
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- XMPRZFWANVGSJH-UHFFFAOYSA-N dibutyl(diisocyanato)stannane Chemical compound CCCC[Sn](N=C=O)(N=C=O)CCCC XMPRZFWANVGSJH-UHFFFAOYSA-N 0.000 description 1
- KORSJDCBLAPZEQ-UHFFFAOYSA-N dicyclohexylmethane-4,4'-diisocyanate Chemical compound C1CC(N=C=O)CCC1CC1CCC(N=C=O)CC1 KORSJDCBLAPZEQ-UHFFFAOYSA-N 0.000 description 1
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- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08G18/725—Combination of polyisocyanates of C08G18/78 with other polyisocyanates
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Abstract
Description
ポリウレタン樹脂組成物の製造
ポリオールとして数平均分子量が2,050g/molのポリカーボネートジオール(polycarbonatediol;PCDL、Asahi kasei社)、鎖延長剤として1,4−ブタンジオール(1,4−butanediol;1,4BD、BASF社)、第1イソシアネート系硬化剤として2個のイソシアネート官能基を含むH12MDI(Evonik社)、第2イソシアネート系硬化剤としてイソホロンジイソシアネート(isophorone diisocyanate;IPDI、Evonik社)、触媒としてジブチルスズジラウレート(dibutyl tin dilaurate;DBTDL)、有機溶剤としてメチルエチルケトンを準備した。その後、ポリオールの含量が約70.03重量%、鎖延長剤の含量が約6.64重量%、第2イソシアネート系硬化剤の含量が約23.33重量%の混合物を製造し、前記混合物100重量部と有機溶剤50重量部を混合して混合溶液を製造した。
製造されたポリウレタン樹脂組成物を基材フィルムであるポリエチレンテレフタレート(polyethylene terephthalate;PET)フィルム上に約200μmで塗布した。その後、ポリウレタン樹脂組成物を100℃で熱処理してポリウレタン樹脂層を形成し、ポリウレタン樹脂層を50℃で48時間追加硬化させて、95μmの厚さを有する熱可塑性ポリウレタンフィルムを最終的に製造した。
ポリウレタン樹脂組成物を製造するために、ポリオール、鎖延長剤、第1イソシアネート系硬化剤、第2イソシアネート系硬化剤および触媒を下記の表1のように用いたことを除いては、前記実施例1と同様の方法により熱可塑性ポリウレタンフィルムを製造した。下記の表1において、TKA−100はAsahiKASEI社の3官能イソシアネート系硬化剤である。
ポリウレタン樹脂組成物を製造するために、ポリオール、鎖延長剤、第1イソシアネート系硬化剤、第2イソシアネート系硬化剤および触媒を下記の表1のように用いたことを除いては、前記実施例1と同様の方法により熱可塑性ポリウレタンフィルムを製造した。下記の表1において、MHG−80BはAsahiKASEI社の6官能イソシアネート系硬化剤である。
熱可塑性ポリウレタンフィルムの引張強度を測定するために、実施例1〜実施例5および比較例1で製造された熱可塑性ポリウレタンフィルムをASTM D−638規格に従って加工して試片を製作した。その後、Ultimate Tensile Machine(UTM)機械(Model 3343、INSTRON社)を用いて、前記試片の一端を固定させ、他端を300mm/minの速度で引っ張り、熱可塑性ポリウレタンフィルムが延伸する程度に応じた引張強度を測定した。
Claims (14)
- ポリウレタン樹脂、第1イソシアネート系硬化剤および有機溶剤を含むポリウレタン樹脂組成物の硬化物を含み、
5%以上10%以下の初期延伸率において引張強度が0.2MPa以上1.5MPa以下である、熱可塑性ポリウレタンフィルム。 - 前記第1イソシアネート系硬化剤の含量は、前記ポリウレタン樹脂100重量部に対して2.5重量部以上5重量部以下である、請求項1に記載の熱可塑性ポリウレタンフィルム。
- 前記第1イソシアネート系硬化剤は2個以上6個以下のイソシアネート官能基を含む、請求項1または2に記載の熱可塑性ポリウレタンフィルム。
- 前記ポリウレタン樹脂は、数平均分子量が1,800g/mol以上2,200g/mol以下のポリオール、炭素数4以上10以下のジオールを含む鎖延長剤、および第2イソシアネート系硬化剤を含む混合物の共重合体である、請求項1から3の何れか1項に記載の熱可塑性ポリウレタンフィルム。
- 前記ポリオールの含量は、前記混合物の重量に対して60重量%以上75重量%以下である、請求項4に記載の熱可塑性ポリウレタンフィルム。
- 前記鎖延長剤の含量は、前記混合物の重量に対して5重量%以上10重量%以下である、請求項4または5に記載の熱可塑性ポリウレタンフィルム。
- 前記第2イソシアネート系硬化剤の含量は、前記混合物の重量に対して20重量%以上30重量%以下である、請求項4から6の何れか1項に記載の熱可塑性ポリウレタンフィルム。
- 前記ポリウレタン樹脂組成物の固形分含量は20%以上70%以下である、請求項1から7の何れか1項に記載の熱可塑性ポリウレタンフィルム。
- 厚さが10μm以上250μm以下である、請求項1から8の何れか1項に記載の熱可塑性ポリウレタンフィルム。
- 請求項1から9の何れか1項に記載の熱可塑性ポリウレタンフィルムの製造方法であって、
ポリウレタン樹脂、第1イソシアネート系硬化剤および有機溶剤を含むポリウレタン樹脂組成物を製造するステップ、
前記ポリウレタン樹脂組成物を基材フィルム上に塗布し熱処理してポリウレタン樹脂層を形成するステップ、および
前記ポリウレタン樹脂層を追加硬化させるステップ
を含む、熱可塑性ポリウレタンフィルムの製造方法。 - 前記熱処理は100℃以上150℃以下の温度で行われる、請求項10に記載の熱可塑性ポリウレタンフィルムの製造方法。
- 前記追加硬化は、25℃以上40℃以下の温度で48時間以上72時間以下の時間の間行われる、請求項10または11に記載の熱可塑性ポリウレタンフィルムの製造方法。
- 前記ポリウレタン樹脂は、数平均分子量が1,800g/mol以上2,200g/mol以下のポリオール、炭素数4以上10以下のジオールを含む鎖延長剤、および第2イソシアネート系硬化剤を含む混合物を有機溶剤において共重合反応させて製造される、請求項10から12の何れか1項に記載の熱可塑性ポリウレタンフィルムの製造方法。
- 前記共重合反応は50℃以上70℃以下の温度で行われる、請求項13に記載の熱可塑性ポリウレタンフィルムの製造方法。
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