JP4104460B2 - 溶融加工可能なポリマー用加工助剤を含む組成物の製造方法 - Google Patents
溶融加工可能なポリマー用加工助剤を含む組成物の製造方法 Download PDFInfo
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- JP4104460B2 JP4104460B2 JP2002566257A JP2002566257A JP4104460B2 JP 4104460 B2 JP4104460 B2 JP 4104460B2 JP 2002566257 A JP2002566257 A JP 2002566257A JP 2002566257 A JP2002566257 A JP 2002566257A JP 4104460 B2 JP4104460 B2 JP 4104460B2
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Description
A)溶融加工可能な非フッ素化ポリマーと、
B)押出し成形可能な組成物の総重量を基準にして25重量ppmから2000重量ppmのフルオロポリマーであり、ダイの直前の点で測定される場合、2ミクロンより大きく10ミクロン未満の重量平均粒径を有するフルオロポリマーと、
を含み、前記組成物は、界面剤を実質的に含まない。
A)溶融加工可能な非フッ素化ポリマーと、
B)押出し成形可能な組成物の総重量を基準にして25重量ppmから2000重量ppmのフルオロポリマーであり、ダイの直前の点で測定される場合、2ミクロンより大きく10ミクロン未満の重量平均粒径を有するフルオロポリマーと、
C)ダイの直前の点で測定される場合、2ミクロンより大きく10ミクロン未満のフルオロポリマー重量の平均粒径を達成するのに、少なくとも有効な量の界面剤であるが、界面剤対フルオロポリマーの重量比が5:1以下である界面剤と、
を含む。
A)溶融加工可能な非フッ素化ポリマーと、
B)マスターバッチの総重量を基準にして、フルオロポリマーを1〜50重量%と、
C)加工性を改善するのに、少なくとも有効な量の界面剤であるが、界面剤とフルオロポリマーとの重量比が5:1以下であり、界面剤がポリ(オキシアルキレン)ポリマーである場合は、ポリ(オキシアルキレン)ポリマーとフルオロポリマーとの重量比が1:1未満となるように存在する界面剤と、
を含む。
A = (ΣiwiXi)
によって定義され、式中、Aは、重量平均粒径(直径)であり;wiは、Xiによって定義される範囲の粒径を有する特定のサンプル中のフルオロポリマー粒子の重量フラクションであり;Xiは、サンプル中の粒径範囲をi間隔に分割し、Xiがi番目の間隔に包含される粒径の範囲の平均粒径となるように割り当てられることにより特定される。Wiは、a)光学顕微鏡、デジタルカメラ、および担体樹脂を溶融させる高温ステージを使用してフルオロポリマー分散体を検査すること、b)共焦レーザー顕微鏡を使用して、フルオロエラストマー粒子を三次元で投影した後、適切なソフトウェアを使用してサイズ分析を行うこと、c)フルオロポリマー分散体の顕微鏡写真を分析すること、またはd)最初にマトリックス樹脂を溶解させることにより、マトリックスポリマー樹脂からフルオロポリマー粒子を分離した後、光散乱または他の幾つかの既知の技術で粒径分布を測定すること、などの多くの手段により決定されてもよい。対照的に他の情報がなく、wiが顕微鏡写真から計算される場合、粒子は、形状が実質的に球状であると仮定されてもよい。
PCL−1は、数平均分子量が1000のポリカプロラクトンジオールであった。
PCL−2は、数平均分子量が2000のポリカプロラクトンジオールであった。
PCL−3は、数平均分子量が4000のポリカプロラクトンジオールであった。
PCL−4は、数平均分子量が32000のポリカプロラクトンジオールであった。
本発明のマスターバッチ(MB−1とコードされるものなど)および対照(MB−Aとコードされるものなど)は、毎分300回転(rpm)および200℃で運転し、成分を溶融混練する28mmの同方向回転二軸押出機を使用して、表1(値は重量%である)に示される組成物から製造された。押出されたストランドは、水浴中で冷却され、ペレット化された。
本発明の押出し成形可能な組成物(EC−5およびEC−6)および対照の押出し成形可能な組成物(EC−C〜EC−E)は、マスターバッチMB−5、MB−6、MB−7、MB−8およびMB−Cから(それぞれ)、マスターバッチ1.33重量%をLLDPE−1とドライブレンドすることにより作製され、全ての押出し成形可能な組成物中に、FE−2フルオロポリマー加工助剤が200ppm、および様々な分子量のPCL界面剤が0(対照C中)または465ppm(EC−5およびEC−6中、並びにEC−DおよびEC−E中)存在する結果になった。表IIIは、実施例1に記載の方法に従い実施された、押出し試験および粒径測定の結果を列挙する。
300rpmおよび200℃で運転する28mmの同方向回転二軸押出機を使用して成分を溶融混練し、表VIに示されるマスターバッチ組成物(値は、重量パーセントである)を製造した。押出されたストランドは、水浴中で冷却され、ペレット化された。マスターバッチ中のFE−1の濃度を増大させることにより、マスターバッチ中のフルオロエラストマー粒子のサイズを増大させた。マスターバッチ中に存在する大きいフルオロエラストマー粒子を(ダイ入口で)2ミクロン未満の重量平均直径まで小さくするのにブラベンダー(Brabender)(登録商標)押出機中での分散混合の量が不十分であった場合、大きい粒子を含有するマスターバッチは、小さいフルオロエラストマー粒子を含有するマスターバッチよりメルトフラクチャー欠陥が生じなくなるのが迅速であった。MB−9およびMB−10で、低フルオロエラストマー濃度(MB−GおよびMB−Hと同じ)を維持することにより、マスターバッチの配合中に使用されるポリエチレンのメルトインデックスが増大すると同時に、マスターバッチ中のフルオロエラストマー粒径も増大し得ることが実証された。大きいフルオロエラストマー粒子を製造し、それらをダイに送達する第3の方法は、MB−11で実証されたが、MB−11では、より高粘度のフルオロエラストマー(FE−3)が比較的低濃度(MB−Gと同じ)で使用された。FE−3は、FE−1より分散し難かったため、MB−11マスターバッチでは、MB−Gよりもダイに送られるフルオロエラストマー粒子が大きくなり、溶融欠陥が生じなくなるのがより迅速であった。
本発明のMB−12、並びに比較のマスターバッチMB−IおよびMB−Jの組成物を表VIIに示す。値は、重量パーセントである。マスターバッチMB−12およびMB−Jは、実施例1に記載のプロセスにより二軸押出機で製造された。マスターバッチMB−Iは、他の全ての配合パラメータは変更されないままであり、加工温度は200℃ではなく280℃であったこと以外、実施例1に記載のように二軸押出機で製造された。このように加工温度が高くなるのは、市販のポリエチレン製造に使用されるペレット化押出機中で達成される温度に典型的である。フルオロポリマー加工助剤は、ペレット化押出機のホッパーに直接添加する(即ち、マスターバッチは使用されない)ことより、ポリエチレン樹脂に頻繁に組み込まれる。
Claims (2)
- ダイを通過する押出し成形可能な組成物の製造方法であって、
A)溶融加工可能な非フッ素化ポリマーと、
B)前記押出し成形可能な組成物の総重量を基準にして、25重量ppmから2000
重量ppmのフルオロポリマーであり、前記ダイの直前の点で測定される場合、2ミクロ
ンより大きく10ミクロン未満の重量平均粒径(顕微鏡による押出し成形可能な組成物の断面視による視覚分析により測定された)を有するフルオロポリマーと
を用い、かつ
押出し成形可能な組成物の総重量を基準にして10重量ppm以下の界面剤を用いることを特徴とする組成物の製造方法。 - ダイを通過する押出し形成可能な組成物の製造方法であって、
A)溶融加工可能な非フッ素化ポリマーと、
B)前記押出し形成可能な組成物の総重量を基準にして、25重量ppmから2000
重量ppmのフルオロポリマーであり、前記ダイの直前の点で測定される場合、2ミクロ
ンより大きく10ミクロン未満の重量平均粒径(顕微鏡による押出し成形可能な組成物の断面視による視覚分析により測定された)を有するフルオロポリマーと、
C)前記ダイの直前の点で測定される場合、2ミクロンより大きく10ミクロン未満であるフルオロポリマーの重量平均粒径(顕微鏡による押出し成形可能な組成物の断面視による視覚分析により測定された)を達成するのに少なくとも有効な量の界面剤である
が、界面剤とフルオロポリマーとの重量比が5:1以下である界面剤と
を用い、かつ
前記押出し形成可能な組成物は、押出機出口圧力が20MPa以下の単軸押出機によって処理されることを特徴とする組成物の製造方法。
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US26924701P | 2001-02-16 | 2001-02-16 | |
US09/953,638 US6642310B2 (en) | 2001-02-16 | 2001-09-17 | Process aid for melt processable polymers |
PCT/US2002/005487 WO2002066544A2 (en) | 2001-02-16 | 2002-02-12 | Process aid for melt processable polymers |
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2001
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2002
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- 2002-02-12 KR KR1020037010741A patent/KR100864362B1/ko active IP Right Grant
- 2002-02-12 EP EP09156699A patent/EP2070972A1/en not_active Withdrawn
- 2002-02-12 KR KR1020087002654A patent/KR100840094B1/ko active IP Right Grant
- 2002-02-12 DE DE60231926T patent/DE60231926D1/de not_active Expired - Lifetime
- 2002-02-12 DE DE60222860T patent/DE60222860T2/de not_active Expired - Lifetime
- 2002-02-12 KR KR1020087021125A patent/KR100870388B1/ko active IP Right Grant
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- 2002-02-12 WO PCT/US2002/005487 patent/WO2002066544A2/en active IP Right Grant
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- 2002-02-12 BR BRPI0207482-6A patent/BR0207482B1/pt not_active IP Right Cessation
- 2002-02-12 EP EP02724996A patent/EP1366108B1/en not_active Revoked
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- 2003-06-23 US US10/602,255 patent/US6875814B2/en not_active Expired - Fee Related
- 2003-06-23 US US10/602,267 patent/US6894118B2/en not_active Expired - Lifetime
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- 2005-12-06 US US11/295,073 patent/US7449520B2/en not_active Expired - Lifetime
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