CATALYST FOR OLEFIN POLYMERIZATION, METHOD FOR PRODUCING OLEFIN POLYMER, METHOD FOR PRODUCING PROPYLENE-BASED COPOLYMER, PROPYLENE POLYMER, PROPYLENE-BASED POLYMER COMPOSITION, AND USE OF THOSE

CATALYST FOR OLEFIN POLYMERIZATION, METHOD FOR PRODUCING OLEFIN POLYMER, METHOD FOR PRODUCING PROPYLENE-BASED COPOLYMER, PROPYLENE POLYMER, PROPYLENE-BASED POLYMER COMPOSITION, AND USE OF THOSE

Provided is a propylene-based polymer comprising constituent units derived from propylene in an amount of more than 90 mol % (provided that the total amount of constituent units in the polymer is 100 mol %), and satisfying the following requirements [1] and [2-1]: [1] the syndiotactic pentad fractio...

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Hauptverfasser: NAKAMURA, TATSUYA, HIROTA, NARITOSHI, HIWARA, MAYUMI, MARUBAYASHI, HIROMASA, YAMAMURA, YUICHI, YUKITA, TAKASHI, OTSUZUKI, SHIRO, NAKAGAWA, TAKASHI, OKAMOTO, MASAHIKO, IKENAGA, SHIGENOBU, ICHIKI, YASUO, HIGUCHI, MASASHI, NAGAHASHI, KOUJI, KONNO, MIYUKI, YAMAGUCHI, TOMOHIRO, TOHI, YASUSHI, MORI, RYOJI
Format: Patent
Sprache:eng
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Zusammenfassung:Provided is a propylene-based polymer comprising constituent units derived from propylene in an amount of more than 90 mol % (provided that the total amount of constituent units in the polymer is 100 mol %), and satisfying the following requirements [1] and [2-1]: [1] the syndiotactic pentad fraction (rrrr fraction) as measured by 13 C-NMR is 85% or greater; and [2-1] the melting point (Tm) determined by differential scanning calorimetry (DSC) is 145°C or higher.