POLYPROPYLENE-BASED RESINS AND POLYPROPYLENE-BASED RESIN COMPOSITIONS

• Main Authors: MASATOSHI TODA, MOTOKI YAMADA, YUTAKA KOBAYASHI, MASARU NAKAGAWA, TAKASHI SUMITIMO
• Format: Patent
• Language: English
• Published: 31.12.2007
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

DISCLOSED ARE A POLYPROPYLENE-BASED RESIN AND A POLYPROPYLENE-BASED RESIN COMPOSITION HAVING WELL-BALANCED, HIGH-LEVEL FLOWABILITY, STIFFNESS AND IMPACT RESISTANCE. THE POLYPROPLENE-BASED RESIN HAS AN MI OF FROM 30 TO 70 G/10 MIN AND A 25°C XYLENE-SOLUBLE CONTENT, X, OF FROM 5 TO 15% BY WEIGHT, IN WHICH THE 25°C XYLENE-SOLUBLE COMPONENT IS SUCH THAT (A) ITS ETHYLENE UNIT CONTENT, Z, IS FROM 20 TO 30% BY WEIGHT, AND (B) ITS INTRINSIC VISCOSITY, [ ], IN DECALIN AT 135°C IS NOT SMALLER THAN 2.00 DL/G, AND IN WHICH THE 25°C XYLENE-INSOLUBLE COMPONENT IS SUCH THAT (C) ITS ETHYLENE UNIT CONTENT, Y (% BY WEIGHT), SATISFIES THE FOLLOWING: 100Y/[Y X (1-x/100) + x ] ≤ 1.13Z - 16.6, (D) IN GPC, THE CONTENT OF ITS CONSTITUENT COMPONENT HAVING A MOLECULAR WEIGHT OF NOT SMALLER THAN 106 IS NOT SMALLER THAN 2% BY WEIGHT, (E) ITS MI IS FROM 40 TO 130 G/10 MIN, AND (F) ITS STEREOSPECIFICITY INDEX IS NOT SMALLER THAN 98.5%.THE RESIN COMPOSITION COMPRISES (A) FROM 45 TO 90% BY WEIGHT OF THE POLYPROPYLENE-BASED RESIN, (B) FROM 5 TO 50% BY WEIGHT OF AN ETHYLENIC COPOLYMER, AND (C) FROM 0 TO 25% BY WEIGHT OF TALC.