PROBLEM TO BE SOLVED: To provide a thermoplastic resin composition capable of providing a structure extremely reducing creak generated when components are rubbed each other, maintaining creak reduction effects even when standing it under high temperature for long time and further excellent in impact resistance and molding appearance.SOLUTION: A thermoplastic resin composition [X] for reducing creak contains a rubber reinforced vinyl resin [A] obtained by polymerizing a vinyl monomer [b1] in presence of an ethylene α-olefin rubbery polymer [a1] having Tm (melting point) of 0°C or more and a silicone oil, and has Mooey viscosity (ML1+4, 100°C; according to JIS K6300) of the ethylene α-olefin rubbery polymer [a1] having Tm (melting point) of 0°C or more of 5 to 80. The silicon content derived from the silicone oil in the thermoplastic resin composition [X] is 0.15 mass% or less based on 100 mass% of the thermoplastic resin composition [X].SELECTED DRAWING: None
【課題】部品同士が擦れ合うときに発生する軋み音が著しく低減され、かつ高温下に長時間置かれた場合でも軋み音低減効果が維持され、更に、耐衝撃性及び成形外観に優れた構造体を与え得る熱可塑性樹脂組成物を提供する。【解決手段】Tm(融点)が0℃以上のエチレン・α−オレフィン系ゴム質重合体〔a1〕の存在下にビニル系単量体〔b1〕を重合して得られるゴム強化ビニル系樹脂〔A〕及びシリコーンオイルを含有してなる熱可塑性樹脂組成物〔X〕であって、前記Tm(融点)が0℃以上のエチレン・α−オレフィン系ゴム質重合体〔a1〕のムーニー粘度(ML1+4、100℃;JIS K6300に準拠)は5〜80であり、前記熱可塑性樹脂組成物〔X〕中の前記シリコーンオイルに由来するケイ素含有量が、該熱可塑性樹脂組成物〔X〕100質量%に対して0.15質量%以下であることを特徴とする軋み音低減用熱可塑性樹脂組成物である。【選択図】なし
THERMOPLASTIC RESIN COMPOSITION FOR REDUCING CREAK AND CREAK REDUCTION STRUCTURE
軋み音低減用熱可塑性樹脂組成物及び軋み音低減構造体
2017-01-26
Patent
Elektronische Ressource
Japanisch
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