POLYCARBONATE RESIN COMPOSITION AND MANUFACTURING METHOD THEREFOR

• Main Authors: YAMAMOTO MASANORI, HITOMI TATSUYA, NISHIHARA RYOHEI, NAKADA MICHIO
• Format: Patent
• Language: English; Japanese
• Published: 19.01.2017
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

PROBLEM TO BE SOLVED: To provide a polycarbonate resin composition excellent in surface hardness, heat resistance moldability, color tone and impact resistance.SOLUTION: There is provided a polycarbonate resin composition containing at least a polycarbonate resin (a) and a polycarbonate resin (b) having different structural unit from the polycarbonate resin (a) and satisfying following conditions. (i) pencil hardness defined in ISO 15184 of the polycarbonate resin (a) is higher than pencil hardness defined in ISO 15184 of the polycarbonate resin (b). (ii) weight ratio between the polycarbonate (a) and the polycarbonate (b) in the polycarbonate resin composition is in a range of 1:99 to 45:55. (iii) melt viscosity of the polycarbonate resin (b) at temperature of 280°C and shear rate of 122 secis higher than melt viscosity of the polycarbonate resin (a) at temperature of 280°C and shear rate of 122 sec.SELECTED DRAWING: None 【課題】表面硬度、耐熱性成形性、色調、耐衝撃性に優れるポリカーボネート樹脂組成物を提供する。【解決手段】少なくともポリカーボネート樹脂（ａ）と、前記ポリカーボネート樹脂（ａ）とは異なる構造単位を有するポリカーボネート樹脂（ｂ）とを含むポリカーボネート樹脂組成物であって、以下の条件を満足することを特徴とするポリカーボネート樹脂組成物。（ｉ）ポリカーボネート樹脂（ａ）のISO 15184で規定される鉛筆硬度が、ポリカーボネート樹脂（ｂ）のISO 15184で規定される鉛筆硬度より高いこと（ｉｉ）ポリカーボネート樹脂組成物におけるポリカーボネート樹脂（ａ）とポリカーボネート樹脂（ｂ）との重量比が、１：９９〜４５：５５の範囲であること（ｉｉｉ）ポリカーボネート樹脂（ｂ）の温度２８０℃、剪断速度１２２ｓｅｃ-1における溶融粘度が、ポリカーボネート樹脂（ａ）の温度２８０℃、剪断速度１２２ｓｅｃ-1における溶融粘度より高いこと【選択図】なし