PURPOSE:To provide the subject composition containing specific high-impact PS, glass-fiber, styrene-butadiene-styrene copolymer and higher fatty acid metal salt at specific rations, having excellent appearance, heat-resistance and impact strength and suitable for copying machine, interior material for automobile, etc. CONSTITUTION:The objective composition is composed of (A) 100 pts.wt. of a high-impact PS free from plasticizer (e.g. mineral oil) and containing 4.5-3.0wt.% of polybutadiene having an average particle diameter of 0.5-2.0mum, (B) 1.5-5 pts.wt. of glass-fiber having an average fiber length of 0.5-2mm and an average aspect ratio of =20 and surface-treated with a silane coupling agent, (C) 2.5-10 pts.wt. of a styrene-butadiene-styrene copolymer containing 40-80wt.% of butadiene compound and (D) 0.05-5 pts.wt. of a higher fatty acid metal salt (preferably calcium stearate, etc.).
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