THERMOPLASTIC RESIN COMPOSITION

• Main Authors: SHIMOZAWA TAKU, UEDA TAKASHI
• Format: Patent
• Language: English; Japanese
• Published: 04.11.2016
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

PROBLEM TO BE SOLVED: To provide a thermoplastic resin composition having excellent fluidity capable of obtaining a molded product excellent in weather resistance, impact resistance and coatability.SOLUTION: There is provided a thermoplastic resin composition which comprises 30 to 70 pts.wt. of a graft copolymer (I) obtained by graft polymerization of a monomer mixture (B) containing an aromatic vinyl-based monomer (c) and a vinyl cyanide-based monomer (d), 5 to 20 pts.wt. of a high vinyl cyanide copolymer (II) obtained by copolymerization of an aromatic vinyl-based monomer and a vinyl cyanide-based monomer and 10 to 65 pts.wt. of a vinyl-based copolymer (III) obtained by copolymerization of a monomer mixture containing more than 70 to 82 wt.% of an aromatic vinyl-based monomer (c) and 18 to less than 30 wt.% of a vinyl cyanide-based monomer (d) in the presence of an acryl-based rubbery polymer having a volume average particle diameter of 0.10 to 0.30 μm which is obtained by copolymerization of 97 to 99.5 wt.% of an acrylic ester-based monomer (a) and 0.5 to 3 wt.% of a polyfunctional monomer (b).SELECTED DRAWING: Figure 1 【課題】流動性に優れ、耐候性と耐衝撃性、塗装性に優れた成形品を得る熱可塑性樹脂組成物の提供。【解決手段】アクリル酸エステル系単量体（ａ）９７〜９９．５重量％と多官能性単量体（ｂ）０．５〜３重量％を共重合した、体積平均粒子径が０．１０〜０．３０μｍであるアクリル系ゴム質重合体（Ａ）の存在下に、芳香族ビニル系単量体（ｃ）およびシアン化ビニル系単量体（ｄ）を含む単量体混合物（Ｂ）をグラフト重合して得られるグラフト共重合体（Ｉ）３０〜７０重量部と、芳香族ビニル系単量体およびシアン化ビニル系単量体を共重合してなる高シアン化ビニル系共重合体（ＩＩ）５〜２０重量部と、芳香族ビニル系単量体（ｃ）７０超え〜８２重量％及びシアン化ビニル系単量体（ｄ）１８〜３０重量％未満を含む単量体混合物を共重合して得られるビニル系共重合体（ＩＩＩ）１０〜６５重量部からなる熱可塑性樹脂組成物。【選択図】図１