Polypropylene material with an improved balance of properties

• Main Authors: SAITO, JUN, KIMITSU, CHIBA, JP, KAGEYAMA, AKIKO, ICHIKAWA, CHIBA, JP, USHIODA, TSUTOMU, ICHIHARA, CHIBA, JP, KAWAMOTO, NAOSHI, KANAZAWA, ISHIKAWA, JP, OOGI, YOSHIYUKI, CHIBA, JP, HATADA, KOUICHI, ICHIHARA, CHIBA, JP
• Format: Patent
• Language: English; German
• Published: 04.06.1998
• Edition: 6
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; THEIR PREPARATION OR CHEMICAL WORKING-UP

Polypropylene (PP) material (I) containing (1) 20-95 wt%stereo-regular PP and (2) 5-80 wt% alpha -olefin copolymer, in which the PP component (1) shows (a) an isotactic pentad (mmmm) of 0.940-0.995, (b) a syndiotactic pentad (rrrr) of 0-0.01, (c) a variable or different bonding of 0-0.10 mol% due to 2,1- and 1,3- insertion of propylene monomer, (d) an average mol. wt. (Mw) of 50,000-1,000,000 and (e) a mol. wt. ratio (Mw/Mn) of 1.5-3.8 (all as determined by C-NMR analysis), and copolymer (2) contains 10-90 wt% alpha -olefin and 10-90 wt% other alpha -olefin(s). Also claimed is a moulded product made from (I).