METHOD FOR PRODUCING SYNDIOTACTIC PROPYLENE POLYMER

• Main Authors: SOEDA, YASUYUKI, MORI, AKIHIDE, ONOGI, TAKAYUKI, KAGEYAMA, FUMIO, OKAMOTO, MASAHIKO
• Format: Patent
• Language: English; French; Japanese
• Published: 22.05.2008
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DYES; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PERFORMING OPERATIONS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF MATERIALS AS ADHESIVES

Disclosed is a graft-modified syndiotactic propylene polymer having a high graft ratio. Also disclosed are a method for producing such a polymer, a resin composition containing such a polymer, and a laminate having at least one layer which contains the composition as an adhesive resin composition. Specifically disclosed is a graft-modified syndiotactic propylene polymer which is characterized by satisfying the following characteristics [1]-[3]. [1] The melt flow rate (MFR) measured at 230°C under a load of 2.16 kg is 30-1000 (g/10 minutes). [2] The concentration of graft groups derived from a radically polymerizable unsaturated compound determined by 1H-NMR measurement is within the range of 0.7-7.0% by weight. [3] The syndiotactic pentad fraction determined by 13C-NMR measurement is not less than 0.80. L'invention concerne un polymère de propylène syndiotactique modifié par greffes, ayant une proportion élevée de greffes. L'invention concerne également un procédé de fabrication d'un tel polymère, une composition de résine contenant un tel polymère, et un stratifié ayant au moins une couche contenant la composition en tant que composition de résine adhésive. L'invention concerne spécifiquement un polymère de propylène syndiotactique modifié par greffes, caractérisé en ce qu'il satisfait les caractéristiques [1] à [3] suivantes. [1] Le débit de la masse fondue (MFR) mesuré à 230 °C sous une charge de 2,16 kg est de 30 à 1 000 (g/10 minutes). [2] La concentration de groupements greffés dérivés d'un composé insaturé polymérisable radicalairement, déterminée par mesure RMN 1H, est comprise entre 0,7 et 7,0 % en poids. [3] La fraction de pentade syndiotactique, déterminée par mesure RMN 13C, est supérieure ou égale à 0,80.