POLYOLEFIN-BASED RESIN COMPOSITION FOR FOOD, MEDICAL, AND MUNICIPAL WATER PIPE APPLICATIONS

• Main Authors: SEGUCHI TETSUYA, OKAMOTO KOHEI, AYABE TAKASHI, KAWAMOTO NAOSHI
• Format: Patent
• Language: English; French; German
• Published: 07.12.2011
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

The present invention provides a stabilized polyolefin-based resin composition for use in food items, medical services and water service pipes, which has superior non-migratory and hygienic properties. The polyolefin-based resin composition for use in food items, medical services and water service pipes according to the present invention comprises a polyolefin-based resin obtained by polymerization of an olefin-based monomer with an addition of a phenolic antioxidant represented by the following Formula (I): (wherein, R 1 and R 2 each independently represents, for example, a hydrogen atom; and T represents, for example, a C 1 -C 30 alkyl group which is optionally branched and/or optionally has a cycloalkyl group) which phenolic antioxidant is masked with an organic aluminum compound, to a catalyst system or polymerization system before or during the polymerization of the olefin-based monomer, in which polyolefin-based resin composition, the phenolic antioxidant represented by the above Formula (I) is added in an amount of 0.001 to 0.5 parts by mass with respect to 100 parts by mass of the aforementioned polyolefin-based monomer.