JP7249713B2 - 高平坦度熱可塑性ポリウレタン発泡製品、その調製方法及び応用 - Google Patents
高平坦度熱可塑性ポリウレタン発泡製品、その調製方法及び応用 Download PDFInfo
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Description
ステップaで取得された前記発泡脂肪族熱可塑性ポリウレタンエラストマービーズをモールドに充填し、熱源により加熱することで、前記発泡脂肪族熱可塑性ポリウレタンエラストマービーズを互いに溶接させることにより、高平坦度熱可塑性ポリウレタン発泡製品を取得するステップbとを備える前記高平坦度熱可塑性ポリウレタン発泡製品の調製方法を更に提供する。
ステップAで取得された混合物を二軸スクリュー反応押出機に入れて連続反応合成を行うことにより、熱可塑性ポリウレタンエラストマーを取得し、取得された熱可塑性ポリウレタンエラストマーのメルトインデックスMFRが5~250g/10分間であり、取得された熱可塑性ポリウレタンエラストマーの融点が100~160℃であるステップBを備える。
本実施形態の高平坦度発泡ビーズ製品用の熱可塑性ポリウレタンエラストマーの調製方法は、
1重量部の平均モル数1000g/molのポリテトラメチレンエーテル、0.38重量部の水素化ジフェニルメタンジイソシアネート(HMDI)、0.043重量部の1,4ブタンジオール、0.005重量部のジラウリン酸第一スズ及び0.01重量部の酸化防止剤1010を、ギアポンプにより注入システムに送って均一に混合することで、混合物を取得するステップaと、
ステップaの混合物を二軸スクリュー押出機に入れ、連続反応合成を行うことにより、熱可塑性ポリウレタンエラストマーを取得し、押出機の各ゾーンの温度は、それぞれ、第一のゾーン及び第二のゾーンが何れも150℃であり、第三のゾーン、第四のゾーン及び第五のゾーンが何れも170℃であり、第六のゾーン、第七のゾーン及び第八のゾーンが何れも180℃であり、第九のゾーン及び第十のゾーンが何れも200℃であり、ヘッドの温度が205℃であり、スクリュー回転速度が200rpmであるステップbと、を備える。
本実施形態の高平坦度発泡ビーズ製品用の熱可塑性ポリウレタンエラストマーの調製方法は、
1重量部の平均モル数3000g/molのポリブチレンアジペート、0.24重量部のイソホロンジイソシアネート(IPDI)、0.09重量部の1,6ヘキサンジオール、0.004重量部のジブチルスズジアセテート及び0.005重量部のタルクを、ギアポンプにより注入システムに送って均一に混合することにより、混合物を取得するステップaと、
ステップaの混合物を、二軸スクリュー押出機に入れ、連続反応合成を行うことにより、熱可塑性ポリウレタンエラストマーを取得し、押出機の各ゾーンの温度は、それぞれ、第一のゾーン及び第二のゾーンが何れも150℃であり、第三のゾーン、第四のゾーン及び第五のゾーンが何れも160℃であり、第六のゾーン、第七のゾーン及び第八のゾーンが何れも170℃であり、第九のゾーン及び第十のゾーンが何れも180℃であり、ヘッドの温度が185℃であり、スクリュー回転速度が300rpmであるステップbとを備える。
本実施形態の高平坦度発泡ビーズ製品用の熱可塑性ポリウレタンエラストマーの調製方法は、
1重量部の平均モル数が1500g/molのポリテトラメチレンエーテル、0.34重量部のヘキサメチレンジイソシアネート(HDI)、0.12重量部の1,4ブタンジオール、0.002重量部のトリエチルアミン及び0.01重量部の酸化防止剤1098を、ギアポンプにより注入システムに送って均一に混合することにより、混合物を取得するステップaと、
ステップaの混合物を、二軸スクリュー押出機に入れ、連続反応合成を行うことにより、熱可塑性ポリウレタンエラストマーを取得し、押出機の各ゾーンの温度は、それぞれ、第一のゾーン及び第二のゾーンが何れも150℃であり、第三のゾーン、第四のゾーン及び第五のゾーンが何れも180℃であり、第六のゾーン、第七のゾーン及び第八のゾーンが何れも185℃であり、第九のゾーン及び第十のゾーンが何れも200℃であり、ヘッドの温度が205℃であり、スクリュー回転速度が250rpmであるステップbとを備える。
第一の実施形態と類似する方法に従い、違いは、0.38重量部の水素化ジフェニルメタンジイソシアネート(HMDI)及び0.043重量部の1,4ブタンジオールを、0.55重量部の芳香族イソシアネートMDI及び0.11重量部の1,4ブタンジオールに置き換えるだけである。測定結果が表1に示されている。
第二の実施形態と類似する方法に従い、違いは、0.24重量部のイソホロンジイソシアネート(IPDI)および0.09重量部の1,6ヘキサンジオールを、0.41重量部の芳香族イソシアネート(MDI)及び0.15重量部の1,6ヘキサンジオールに置き換えるだけである。測定結果が表1に示されている。
第三の実施形態と類似する方法に従い、違いは、0.34重量部のヘキサメチレンジイソシアネート(HDI)及び0.12重量部の1,4ブタンジオールを、0.64重量部のジフェニルメタンジイソシアネート(MDI)及び0.17重量部の1,4ブタンジオールに置き換えるだけである。測定結果が表1に示されている。
第三の実施形態と類似する方法に従い、違いは、0.34重量部のヘキサメチレンジイソシアネート(HDI)及び0.12重量部の1,4ブタンジオールを、0.44重量部のヘキサメチレンジイソシアネート(HDI)及び0.17重量部の1,4ブタンジオールに置き換えるだけである。測定結果が表1に示されている。
Claims (9)
- 溶融範囲が20~50℃であり、融点が90~160℃である熱可塑性ポリウレタンエラストマーを含み、密度が0.08~0.8g/cm3であり、固定長定規法の平坦度値が2mm未満であり、
前記熱可塑性ポリウレタンエラストマーは、ヘキサメチレンジイソシアネートタイプ、イソホロンジイソシアネートタイプ、キシリレンジイソシアネートタイプ、水素化ジフェニルメタンジイソシアネートタイプ又は水素化キシリレンジイソシアネートタイプのうちの少なくとも1つであることを特徴とする高平坦度熱可塑性ポリウレタン発泡製品(但し、UV吸収剤を含むものを除く)。 - 前記熱可塑性ポリウレタンエラストマーは、ショア硬度が60A~60Dであることを特徴とする請求項1に記載の高平坦度熱可塑性ポリウレタン発泡製品。
- 前記熱可塑性ポリウレタンエラストマーは、メルトインデックスが10~250g/10分間であることを特徴とする請求項1に記載の高平坦度熱可塑性ポリウレタン発泡製品。
- 溶融範囲が20~50℃であり、融点が90~160℃である熱可塑性ポリウレタンエラストマービーズを、物理的ガス発泡法により、発泡熱可塑性ポリウレタンエラストマービーズを調製して取得するステップaと、
ステップaで取得された発泡熱可塑性ポリウレタンエラストマービーズをモールドに充填し、熱源により加熱することで、前記発泡熱可塑性ポリウレタンエラストマービーズを互いに溶接させることにより、高平坦度熱可塑性ポリウレタン発泡製品を取得するステップbと、を備えることを特徴とする請求項1~3の何れか1項に記載の高平坦度熱可塑性ポリウレタン発泡製品の調製方法。 - ステップaにおいては、前記物理的ガス発泡法は、物理的ガス押出発泡法又はオートクレーブ浸漬法であることを特徴とする請求項4に記載の高平坦度熱可塑性ポリウレタン発泡製品の調製方法。
- 前記物理的ガス押出発泡法は、熱可塑性ポリウレタンエラストマービーズを押出機に入れて溶融し、その後、使用する熱可塑性ポリウレタンエラストマービーズの重量部に基づき、0.01~20重量部の物理発泡剤を押出機の末端に注入し、ダイヘッドの温度を80~180℃に制御し、最後に、ダイヘッドにより押し出して水中ペレット化することにより、発泡熱可塑性ポリウレタンエラストマービーズを取得し、
前記オートクレーブ浸漬法は、熱可塑性ポリウレタンエラストマービーズを耐圧容器に入れ、物理発泡剤を耐圧容器に注入し、80~150℃に加熱し、耐圧容器の圧力を50~150barになるように制御し、最後に、圧力を通常の圧力になるように逃がすことにより、発泡熱可塑性ポリウレタンエラストマービーズを取得することを特徴とする請求項5に記載の高平坦度熱可塑性ポリウレタン発泡製品の調製方法。 - 前記物理発泡剤は、窒素、二酸化炭素、メタン、プロパン、ブタン及びペンタンのうちの少なくとも1つであることを特徴とする請求項6に記載の高平坦度熱可塑性ポリウレタン発泡製品の調製方法。
- 前記熱源により加熱する方法は、蒸気加熱、マイクロ波加熱及び電磁加熱のうちの1つであることを特徴とする請求項4に記載の高平坦度熱可塑性ポリウレタン発泡製品の調製方法。
- 前記高平坦度熱可塑性ポリウレタン発泡製品は、靴底、タイヤ、自転車シート、室内装飾品、クッションパッド、遮音パッド及び子供のおもちゃを製造するために用いられることを特徴とする、靴底、タイヤ、自転車シート、室内装飾品、クッションパッド、遮音パッド及び子供のおもちゃにおける、請求項1~3のいずれか1項に記載の高平坦度熱可塑性ポリウレタン発泡製品の応用。
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