| 摘要 |
PROBLEM TO BE SOLVED: To provide a resin foamed product having a foam density of 20-55 kg/m<SP>3</SP>that has heat resistance and chemical resistance suitable for use in a heat insulating material for construction, excellent moldability and thermoplasticity as well as superior material-recyclable environmental suitability, and especially to provide the thermoplastic resin foamed product and its manufacturing method that satisfy the heat resistance required under a heated atmosphere to 100°C which can not be met by a single styrene resin foamed product and the chemical resistance to phthalates. SOLUTION: This resin foamed product is manufactured by foaming the resin composition that is a copolymer composed of an aromatic vinyl unit and an unsaturated monocarboxylic acid unit, wherein the resin composition contains the unsaturated carboxylic acid unit in a ratio of >8 wt.% and≤12 wt.% in the polymer. Its manufacturing method is also disclosed. COPYRIGHT: (C)2008,JPO&INPIT
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