DUAL METALLOCENE CATALYSTS FOR MAKING FILM RESINS EXCELLENT IN MACHINE DIRECTION (MD) ELMENDORF TEAR STRENGTH

• Main Authors: JENSEN MICHAEL D, BENHAM ELIZABETH A, SUKHADIA ASHISH M, MARTIN JOEL L, KRISHNASWAMY RAJENDRA K, MCDANIEL MAX P, THORN MATTHEW G, KERTOK MARK E, YANG QING, CYMBALUK TED H
• Format: Patent
• Language: English; Japanese
• Published: 13.11.2014
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

PROBLEM TO BE SOLVED: To provide new catalyst compositions and methods of making the catalyst compositions that afford high polymerization activity and allow polymer properties to be maintained within the desired specification ranges.SOLUTION: This invention relates to catalyst compositions comprising a first metallocene compound, a second metallocene compound, at least one chemically treated solid oxide, and at least one organoaluminum compound. This invention also relates to methods for preparing and using the catalyst compositions and new polyolefins. The compositions and methods disclosed herein provide ethylene polymers and copolymers with decreased MI, increased melt strength, and good MD tear properties. 【課題】重合活性が大きく、ポリマーの性質が所望の指定範囲内に保たれるようにする新しい触媒組成物と、その触媒組成物を製造する方法の提供。【解決手段】本発明は、第１メタロセン化合物、第２メタロセン化合物、化学的に処理された固体酸化物の少なくとも１種、及び有機アルミニウム化合物の少なくとも１種を含む触媒組成物に関する。本発明はまた、この触媒組成物及び新しいポリオレフィンの調製及び使用方法にも関する。本明細書に開示される組成物と方法により、ＭＩが小さく、溶融強度が大きく、ＭＤ引裂き特性が良好なエチレンポリマー及びコポリマーが得られる。【選択図】なし