To provide a thermoplastic elastomer composition capable of forming a molded product having excellent low glossiness and flow mark properties while maintaining low temperature impact resistance.SOLUTION: There is provided a thermoplastic elastomer composition obtained by dynamic heat treatment of a composition comprising the following components (A) and (B) in the presence of the following components (C) and (D), wherein the die swell ratio (at a test temperature of 210°C and a shear rate of 243/s) in a capillary rheometer (JIS K7199) is 1.10 or more. Component (A): a propylene-based block copolymer, Component (B): an ethylene-α-olefin copolymer, Component (C): an organic peroxide, Component (D): a crosslinking aid.SELECTED DRAWING: None
【課題】低温耐衝撃性を維持しながら、低光沢とフローマーク性に優れた成形品を可能とする熱可塑性エラストマー組成物を提供する。【解決手段】下記成分(A)と成分(B)を含有する組成物を下記成分(C)と成分(D)の存在下で動的熱処理してなる熱可塑性エラストマー組成物であって、キャピラリーレオメーター(JIS K7199)におけるダイスウェル比(試験温度210℃、せん断速度243/s)が1.10以上である、熱可塑性エラストマー組成物。成分(A):プロピレン系ブロック共重合体成分(B):エチレン・α-オレフィン共重合体成分(C):有機過酸化物成分(D):架橋助剤【選択図】なし
THERMOPLASTIC ELASTOMER COMPOSITION, INJECTION-MOLDED PRODUCT, AND AIR BAG HOUSING COVER
熱可塑性エラストマー組成物、射出成形品及びエアバッグ収納カバー
2022-03-30
Patent
Elektronische Ressource
Japanisch
IPC: | B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / C08J Verarbeitung , WORKING-UP / C08K Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe , USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS |
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