PROBLEM TO BE SOLVED: To provide a thermoplastic elastomer composition excellent in low temperature impact resistance, elastic modulus, high temperature strength and releasability, and excellent in moldability necessary to use for an air bag housing cover.SOLUTION: There is provided a thermoplastic elastomer composition containing following Component (A) and Component (B) with 0.5 to 90 pts.wt. of the Component (B) based on 100 pts.wt. of the Component (A). Component (A): a propylene-based polymer consisting of a propylene-based polymer component (A1) having the propylene content of 90 to 100 wt.% and an ethylene propylene copolymer component (A2) having the ethylene content of 30 to 70 wt.% with 30 to 80 wt.% of the Component (A1) based on the total amount of the Component (A1) and the Component (A2). Component (B): an olefin-based block copolymer containing a polymer block consisting of ethylene and an ethylene α-olefin copolymer block.
【課題】低温耐衝撃性、弾性率、高温強度、離型性に優れ、また、エアバッグ収納カバーに用いるために必要な成形性に優れた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)及び成分(B)を含有し、成分(A)100重量部に対し、成分(B)を0.5〜90重量部含む熱可塑性エラストマー組成物による。成分(A):プロピレン含有量が90〜100重量%であるプロピレン系重合体成分(A1)と、エチレン含有量が30〜70重量%であるエチレン・プロピレン共重合体成分(A2)とからなり、成分(A1)と成分(A2)との合計量に対し、成分(A1)を30〜80重量%含有するプロピレン系重合体成分(B):エチレンからなる重合体ブロックとエチレン・α−オレフィン共重合体ブロックとを含むオレフィン系ブロック共重合体【選択図】なし
THERMOPLASTIC ELASTOMER COMPOSITION, MOLDED ARTICLE AND AIR BAG HOUSING COVER
熱可塑性エラストマー組成物、成形体及びエアバッグ収納カバー
2015-11-05
Patent
Elektronische Ressource
Japanisch
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