The present invention is a thermoplastic elastomer composition obtained by subjecting the following components: 41 to 70 parts by mass of component (A), 0 to 54 parts by mass of component (B), and 5 to 59 parts by mass of component (C) (provided that the total content of the components (A), (B), and (C) is 100 parts by mass) to dynamic heat treatment in the presence of a cross-linking agent. Component (A): a propylene block copolymer having a melt flow rate measured in accordance with ISO1133 at 230°C and a load of 2.16 kg of 20 g/10 min or more. Component (B): an ethylene/α-olefin/non-conjugated polyene copolymer including a structural unit derived from ethylene, a structural unit derived from an α-olefin having 3 to 20 carbon atoms, and a structural unit derived from a non-conjugated polyene. Component (C): an ethylene/α-olefin copolymer including a structural unit derived from ethylene and a structural unit derived from an α-olefin having 4 to 20 carbon atoms and having a melt flow rate measured in accordance with ISO 1133 at 190°C and a load of 2.16 kg of 5 g/10 min or less. The thermoplastic elastomer composition of the present invention has excellent bending elasticity, low-temperature impact resistance, and appearance, and in particular, it can suppress the luster of a tear line when molded into an unpainted airbag cover and can realize good appearance.
THERMOPLASTIC ELASTOMER COMPOSITION AND THERMOPLASTIC ELASTOMER FORMED BODY
THERMOPLASTISCHE ELASTOMERZUSAMMENSETZUNG UND FORMKÖRPER AUS THERMOPLASTISCHEM ELASTOMER
COMPOSITION D'ÉLASTOMÈRE THERMOPLASTIQUE ET CORPS FORMÉ D'ÉLASTOMÈRE THERMOPLASTIQUE
2023-06-21
Patent
Elektronische Ressource
Englisch
IPC: | C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / C08J Verarbeitung , WORKING-UP |