| 摘要 |
PURPOSE:To obtain the title lightweight composition excellent in fluidity and rigidity with high internal loss, useful for e.g. speaker diaphragms, i.e., high- modulus, thin-wall molded products producible through injection molding, by incorporating PP with flaky graphite and petroleum- and/or coal-based hydrogenated hydrocarbon resin(s) at each specified proportion. CONSTITUTION:The objective composition can be obtained by incorporating (A) 100 pts.wt. of PP with (B) 10-70 pts.wt. of flaky graphite (pref. 0.5-100mum in average granular diameter) and (C) 3-30 pts.wt. of petroleum- and/or coal- based hydrogenated hydrocarbon resin (e.g. produced by hydrogenation of a styrene-based resin or coumarone-indene resin). |
