| 摘要 |
PROBLEM TO BE SOLVED: To provide a rubber modified styrene resin composition for extrusion having a large sheet extrusion rate, excellent in environmental stress cracking-resistance of the fabricated sheet, low in contamination and having improved molding workability such as vacuum molding and blow molding. SOLUTION: The rubber modified styrene resin composition comprises (A) a styrene based copolymer as a continuous phase obtained by copolymerizing a specific ratio of each (i-1) a styrene based monomer, (i-2) a vinyl cyanide based monomer, (i-3) other copolymerizable vinyl monomer, and a polyfunctional maleimide based monomer, and (B) rubber particles as a dispersed phase, wherein the rubber content in the resin composition is 1-40 wt.% and (A) the styrene based copolymer has 150,000-450,000 of weight average molecular weight and 22-33 of MIR calculated from the following formula MIR=HMI/MI, HMI: MFR (g/10 min) at 250°C under 10kg of load, Mi: MFR (g/10 min) at 250°C under 1kg of load. COPYRIGHT: (C)2005,JPO&NCIPI
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