JP2021527753A - フィルム用ポリエチレン組成物 - Google Patents
フィルム用ポリエチレン組成物 Download PDFInfo
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- JP2021527753A JP2021527753A JP2021515220A JP2021515220A JP2021527753A JP 2021527753 A JP2021527753 A JP 2021527753A JP 2021515220 A JP2021515220 A JP 2021515220A JP 2021515220 A JP2021515220 A JP 2021515220A JP 2021527753 A JP2021527753 A JP 2021527753A
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Images
Classifications
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F110/00—Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F110/02—Ethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/001—Multistage polymerisation processes characterised by a change in reactor conditions without deactivating the intermediate polymer
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
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- C08F2/01—Processes of polymerisation characterised by special features of the polymerisation apparatus used
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F210/16—Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
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- C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
- C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
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- C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
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Abstract
1) 0.948 〜 0.960 g/cm3 の密度;
2) 20 〜 40 のMIF/MIP比;
3) 6 〜 15 g/10分未満のMIF;
4) 0.5 〜 3.5 のHMWcopo指数;
5) 0.82 以下の長鎖分岐指数(LCBI);
6) 150000 以下のη0.02。
Description
A) 23℃においてISO 1183-1:2012にしたがって決定した密度が0.960g/cm3以上であり、ISO 1133-2:2011にしたがって2.16kgの荷重下で190℃で測定した溶融流れ指数MIEが130g/10分以下、好ましくは120g/10分以下、特に50〜130g/10分、または55〜120g/10分である、30〜70重量%、好ましくは40〜60重量%のエチレン単独重合体または共重合体(単独重合体が好ましい);
B) A)のMIE値よりも低いMIE値、好ましくは0.5g/10分未満のMIE値を有する30〜70重量%、好ましくは40〜60重量%のエチレン共重合体;
前記A)およびB)の量は、A)+B)の総重量を基準とし;
前記ポリエチレン組成物は、下記の特徴を有する:
1) 23℃でISO 1183-1:2012にしたがって測定した、0.948〜0.960cm3、好ましくは0.949〜0.958g/cm3の密度;
2) 20〜40、特に20〜38、または25〜38、または20〜35または25〜35のMIF/MIP比、ここでMIFは21.60kgの荷重下の190℃での溶融流れ指数であり、MIPは5kgの荷重下の190℃での溶融流れ指数であり、両方ともISO 1133-2:2011にしたがって測定したもの;
3) 6〜15g/10分または6〜13g/10分、特に6.5〜15g/10分または6.5〜13g/10分のMIF;
4) 0.5〜3.5、好ましくは0.5〜3.3、より好ましくは0.8〜3.3または0.5〜3.0、より好ましくは0.8〜3.3または0.8〜3.0のHMWcopo指数;
5) 0.82以下、または0.80以下、または0.72以下、特に0.82〜0.45、または0.80〜0.45、または0.72〜0.45の長鎖分岐指数(LCBI);
前記HMWcopoの指数は下記の式にしたがって測定される:
HMWcopo=(η0.02xtmaxDSC)/(10^5)
前記式において、η0.02は、0.02rad/sの角振動数印加による動的振動剪断モード(dynamic oscillatory shear mode)で平行板レオメータで190℃の温度で測定された溶融物の複素粘度(Pa.s)であり;tmaxDSCは示差走査熱量計(differential scanning calorimetry)装置において等温モードで測定した静止状態下で124℃の温度で結晶化の熱流の最大値に達するのに必要な時間(分)であり;LCBIは、1,000,000g/molの分子量でGPC−MALLSによって測定した測定平均二乗回転半径Rg対、同一の分子量を有する線形PEに対する平均二乗回転半径の比である;
6) η0.02が150000以下、好ましくは130000以下、より好ましくは125000以下、下限はすべての場合に40000、より好ましくはすべての場合に50000である。
図面は本明細書に開示されているエチレン重合方法の様々な実施形態によって使用するのに適した2つの直列連結気相反応器において、本明細書に開示されたポリエチレン組成物の様々な実施形態を生産する工程を簡略化したフローチャートの例示的な実施形態である。
様々な実施形態は図面に示した配置および手段に限定されるものではないことを理解すべきである。
ER=(1.781*10-3)*G'
G''=5,000dyn/cm2の値で。
− エチレンホモポリマーまたはコポリマーA)の密度が、0.960〜0.971g/cm3、より好ましくは0.965〜0.970g/cm3;
− 1000で割ったη0.02とLCBIとの比である、比(η0.02/1000)/LCBIが、120〜180、好ましくは125〜178;
− 共単量体含量が組成物の総重量(IRによって決定されたとおり)を基準にして2重量%以下、特に0.2〜2重量%であり;
− ET値が25以下、特に3〜25;
ETは下記式によって計算する:
tanδ=C3におけるET=C2/G*
ここで:
G*=[(G’)2+(G’’)2]1/2;
tanδ=G’’/G’;
C2=106dyn/cm2およびC3=1.5
G’=貯蔵弾性率;
G’=損失弾性率;
G’とG”との両方ともが、190℃の温度でプレート−プレート回転型レオメータでの動的振動剪断によって測定される;
− 長鎖分岐指数(LCBI)が0.70以下、特に、0.70〜0.45である。
a) MgCl2上に担持されたTi化合物および電子供与体化合物EDを任意選択で含む固体触媒成分;
b) 有機Al化合物;および選択的に
c) 外部電子供与体化合物EDext。
a) 水素の存在下で気相反応器においてエチレンを任意選択的に1種以上の共単量体とともに重合するステップ;
b) ステップa)より少ない量の水素の存在下で、別の気相反応器においてエチレンを1種以上の共単量体と共重合するステップ;
ここで、前記気相反応器のうち少なくとも1つにおいて、成長する重合体粒子が高速流動化または輸送条件下で、第1重合ゾーン(上昇管(riser))を通って上方に流れ、前記上昇管を離れた後、第2重合ゾーン(下降管(downdomer))に入り、前記第2重合ゾーンを通ってそれらは重力の作用下で下方に流れ、前記下降管を離れた後、前記上昇管内に再び投入されることによって前記2つの重合ゾーンの間に重合体の循環を確立する。
実施例
下記のように0.02rad/sの角周波数および190℃で測定した。
検体を200℃および200バール下で4分間1mm厚のプレートに溶融圧縮した。直径25mmのディスク標本がスタンピングされ、190℃で予熱したレオメータに挿入した。市販されている任意の回転型レオメータを用いて測定を行うことができる。ここでプレート−プレートジオメトリが備えられたAnton Paar MCR 300を用いた。いわゆる振動数掃引(frequency−sweep)を5%の一定する歪み振幅下でT=190℃で行い(測定温度で検体を4分間アニーリングした後)、628〜0.02rad/sの励起振動数ωの範囲で物質の応力反応の測定および分析を行った。標準化された基本ソフトウェアを用いて流動学的特性、すなわち貯蔵弾性率G′、損失弾性率G″、位相遅れδ(=arctan(G″/G′))および複素粘度η*を、適用された振動数の関数として計算し、すなわち、η*(ω)=[G′(ω)2+G″(ω)2]1/2/ωである。0.02rad/sの適用された振動数ωでの後者の値はη0.02である。
ER=(1.781*10-3)*G'
G''=5,000dyn/cm2の値で。
tanδ=C3におけるET=C2/G*
ここで:
G*=[(G’)2+(G’’)2]1/2;
tanδ=G’’/G’;
HMWcopo=(η0.02xtmaxDSC)/(10^5)
g′(M)=<Rg2>サンプル、M/<Rg2>線形参照、M
ここで、<Rg2>、Mは分子量Mの画分に対する平均二乗根回転半径である。
−処理量:72Kg/h;
−ブローアップ比BUR:4;
−ネック(neck)長さNL:960mm(8DD);
−引取(haul‐off)速度:67m/min.
−重量計量式(gravimetric dosing)である、溝付および冷却供給セクションを備えた単一スクリュー押出機;
−直径D=50mm、長さ30Dであり、せん断および混合部材(elements)を備えたスクリュー;
−205℃+/−5℃の範囲の溶融温度を達成するために180℃から220℃まで昇温する温度プロファイル(11個ゾーン)(押出機:180/185/190/195/200/205/205、ヘッド:210/210/220/220);
−スクリーン後に測定される溶融温度;
−スクリーン交換機:スクリーン面積120cm2、スクリーンパックは使用せず、単に直径が約2mmである穴50〜60個のダイ‐プレートである;
−溶融圧力(押出圧力):スクリーン交換機以前に測定される;
−直径120mm、ダイギャップ1.0mmであり、螺旋状マンドレル(4個ポート)を備えたフィルムダイ;
−二重リップ冷却リング(細川‐アルパインCR32)、冷却された冷却空気(18℃+/−2℃)、内部バブル冷却IBCなし;
−補正バスケット;ネック長さに合わせたバスケットの高さ(上端の冷却リングから下端のバスケットまで970mmを使用する)
−木材平坦化デバイス、取出ユニットおよびフィルムワインダ;
−処理量:72Kg/h;
−ブローアップ比BUR:4;
−ネック(neck)長さNL:960mm(8DD);
−フィルム厚さ:12.5μm;
−引取(haul‐off)速度:67m/min.
≦+/−3cmであれば、3ポイントが付加され;
≦+/−5cmであれば、2ポイントが付加され;
≦+/−10cmであれば、1ポイントが付加され;
≧+/−10cmであれば、0ポイントが付加されるであろう。
試験を基本設定(72Kg/h、BUR:4、NL960mm、12,5μm、67m/min)で開始し、HMまたはVMが>3cmの場合、25ポイントの点数で3ポイント(HMまたはVM>+/−10cm)、2ポイント(HMまたはVM+/−5〜10cm)、または1ポイント(HMまたはVM+/−3〜5cm)を削減し、これは最小点数を22ポイントとなるようにする。
Claims (11)
- 以下を含むポリエチレン組成物:
A) 23℃においてISO 1183-1:2012にしたがって決定した密度が 0.960 g/cm3以上であり、ISO 1133-2:2011にしたがって 2.16 kgの荷重下で190℃で測定した溶融流れ指数MIEが 130 g/10分以下、好ましくは 120 g/10分以下、特に 50 〜 130 g/10分、または 55 〜 120 g/10分である、30〜70重量%、好ましくは40〜60重量%のエチレン単独重合体または共重合体(単独重合体が好ましい);
B) A)のMIE値よりも低いMIE値、好ましくは0.5g/10分未満のMIE値を有する30〜70重量%、好ましくは40〜60重量%のエチレン共重合体;
前記A)およびB)の量は、A)+B)の総重量を基準とし;
前記ポリエチレン組成物は、下記の特徴を有する:
1) 23℃でISO 1183-1:2012にしたがって測定した、 0.948 〜 0.960 cm3、好ましくは 0.949 〜 0.958 g/cm3の密度;
2) 20〜40、特に25〜35のMIF/MIP比、ここでMIFは21.60kgの荷重下の190℃での溶融流れ指数であり、MIPは5kgの荷重下の190℃での溶融流れ指数であり、両方ともISO 1133-2:2011にしたがって測定する;
3) 6 〜 15 g/10分または 6 〜 13 g/10分、特に 6.5 〜 15 g/10分または 6.5 〜 13 g/10分のMIF;
4) 0.5 〜 3.5、好ましくは 0.5 〜 3.3 または 0.5 〜 3.0、より好ましくは 0.8 〜 3.3 または 0.8 〜 3.0 のHMWcopo指数;
5) 0.82 以下、または 0.80 以下、または 0.72 以下、特に 0.82 〜 0.45 、または 0.80 〜 0.45 、または 0.72 〜 0.45 の長鎖分岐指数(LCBI);
前記HMWcopoの指数は下記の式にしたがって測定される:
HMWcopo = (η0.02 x tmaxDSC)/(10^5)
前記式において、η0.02は、0.02rad/sの角振動数印加による動的振動剪断モード(dynamic oscillatory shear mode)で平行板レオメータで190℃の温度で測定された溶融物の複素粘度(Pa.s)であり;tmaxDSCは示差走査熱量計(differential scanning calorimetry)装置において等温モードで測定した静止状態下で124℃の温度で結晶化の熱流の最大値に達するのに必要な時間(分)であり;LCBIは、1,000,000g/molの分子量でGPC−MALLSによって測定した測定平均二乗回転半径Rg対、同一の分子量を有する線形PEに対する平均二乗回転半径の比である;
6) η0.02が 150000 以下、好ましくは 130000 以下、より好ましくは 125000 以下である。 - 1種以上のエチレン共重合体からなるか、またはこれを含む、請求項1に記載のポリエチレン組成物。
- チーグラー・ナッタ重合触媒を使用して得られる、請求項1または2に記載のポリエチレン組成物。
- 前記チーグラー・ナッタ重合触媒が下記のa)〜c)の反応生成物を含む、請求項3に記載のポリエチレン組成物:
a) MgCl2上に担持されたTi化合物を含む予備重合固体触媒成分;
b) 有機Al化合物;および選択的に
c) 外部電子供与体化合物。 - 下記の追加的な特徴のうち少なくとも1つを有する、請求項1に記載のポリエチレン組成物:
− エチレンホモポリマーまたはコポリマーA)の密度が、 0.960 〜 0.971 g/cm3、より好ましくは 0.965 〜 0.970 g/cm3;
− 1000で割ったη0.02とLCBIとの比である、比(η0.02/1000)/LCBIが、 120 〜 180 、好ましくは 125 〜 178 ;
− 200000 〜 400000 のMw値;
− 25 〜 65 、好ましくは 30 〜 65 のMw /Mn値;
− 共単量体含量が組成物の総重量(IRによって決定されたとおり)を基準にして2重量%以下、特に 0.2 〜 2 重量%であり;
− 2 〜 5 のER値;
− ET値が 25 以下、特に 3 〜 25 ;
ここでERは下記式によって計算する:
ER = (1.781*10-3)*G'
G''=5,000 dyn/cm2の値で;
ETは下記式によって計算する:
tan δ = C3におけるET = C2/G*
ここで:
G* = [(G’)2 + (G’’)2]1/2;
tan δ = G’’/G’;
C2 = 106 dyn/cm2 および C3 = 1.5
G’ = 貯蔵弾性率;
G’ = 損失弾性率;
G’とG”との両方ともが、190℃の温度でプレート−プレート回転型レオメータでの動的振動剪断によって測定される;
− 長鎖分岐指数(LCBI)が 0.70 以下、特に、 0.70 〜 0.45 である。 - DDI値が200〜350gの場合、52以上、特に52〜80であるブローフィルムバブル安定性点数(BSS)を有し、DDI値が350gを超える場合、40以上、特に40〜80未満であるBSS点数を有する、請求項1に記載のポリエチレン組成物。
- 請求項1に記載のポリエチレン組成物を含む製造品。
- 単層または多層のブローフィルム状であり、少なくとも1つの層が請求項1に記載のポリエチレン組成物を含む、請求項7に記載の製造品。
- DDI値が200〜350gの場合、バブル安定性点数(BSS)が52以上、特に52〜80である一方、DDI値が350gを超える場合、BSS点数が40以上、特に40〜80未満である、請求項8に記載のブローフィルム。
- すべての重合ステップをMgCl2上に担持されたチーグラー・ナッタ重合触媒の存在下で行う、請求項1に記載のポリエチレン組成物の製造方法。
- 下記のステップを任意の相互順序で含む、請求項10に記載の方法:
a) 水素の存在下で気相反応器においてエチレンを任意選択的に1種以上の共単量体とともに重合するステップ;
b) ステップa)より少ない量の水素の存在下で、別の気相反応器においてエチレンを1種以上の共単量体と共重合するステップ;
ここで、前記気相反応器のうち少なくとも1つにおいて、成長する重合体粒子は高速流動化または輸送条件下で、第1重合ゾーンを通って上方に流れ、前記上昇管を離れた後、第2重合ゾーンに入り、第2重合ゾーンを通ってそれらは重力の作用下で下方に流れ、前記第2重合ゾーンを離れた後、前記第1重合ゾーンに再び投入されることによって前記2つの重合ゾーンの間に重合体の循環を確立する。
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