THERMOPLASTIC RESIN COMPOSITION

• Main Authors: KOBAYASHI MASANORI, SHIMOZAWA TAKU
• Format: Patent
• Language: English; Japanese
• Published: 10.11.2016
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

PROBLEM TO BE SOLVED: To provide a thermoplastic resin composition that is excellent in flowability and can provide a molded article excellent in, weather resistance, impact resistance and surface impact resistance.SOLUTION: The thermoplastic resin composition is provided which is formed by blending, in the presence of a crosslinked acrylic rubbery polymer, 30-70 pts.wt. of a graft copolymer (I) obtained by graft polymerization of an aromatic vinyl monomer and a vinyl cyanide monomer, 30-70 pts.wt. of a vinyl copolymer (II) formed of an aromatic vinyl monomer and a vinyl cyanide monomer, and 40 pts.wt. or more of a polycarbonate resin (III), and in which a ratio of a gel swelling degree (α) of the acrylic rubbery polymer to a graft ratio (β) of the graft copolymer (I) satisfies the following formula (1), and the particles of the graft copolymer (I) are aggregated in the thermoplastic resin composition. 0.4≤(α)/(β)≤2.0 (1)SELECTED DRAWING: Figure 1 【課題】流動性に優れ、耐候性、耐衝撃性および面衝撃性に優れた成形品を得ることができる熱可塑性樹脂組成物を提供。【解決手段】架橋アクリル系ゴム質重合体の存在下に、芳香族ビニル系単量体とシアン化ビニル系単量体をグラフト重合して得られるグラフト共重合体（Ｉ）と、芳香族ビニル系単量体とシアン化ビニル系単量体からなるビニル系共重合体（ＩＩ）と、ポリカーボネート樹脂（ＩＩＩ）を配合してなる熱可塑性樹脂組成物であって、グラフト共重合体（Ｉ）とビニル系共重合体（ＩＩ）がそれぞれ３０〜７０重量部、ポリカーボネート樹脂（ＩＩＩ）４０重量部以上からなり、アクリル系ゴム質重合体のゲル膨潤度（α）の、グラフト共重合体（Ｉ）のグラフト率（β）に対する比が下記式（１）を満たし、かつ、該熱可塑性樹脂組成物中において、グラフト共重合体（Ｉ）粒子が凝集した構造を有する熱可塑性樹脂組成物。０．４≦（α）／（β）≦２．０（１）【選択図】図１