| 摘要 |
<p>PURPOSE: To provide a light-weight, inexpensive reinforcing material for closed cross section structure material-reinforcing structure such as a car, which comprises an epoxy resin, a synthetic rubber and a thermoplastic resin in a specific proportion, thus is increased in flexural rigidity, torsional rigidity and energy absorption properties. CONSTITUTION: At least, 30-40wt.% of an epoxy resin, 5-15wt.% of a synthetic rubber such as styrene-butadiene rubber, 5-15wt.% of a thermoplastic resin such as poly(vinyl butyral) and 40-50wt.% of a filler such as calcium carbonate are formulated to give this new, light-weight and inexpensive heat-foaming reinforcing filler material l having markedly improved flexural rigidity and torsional rigidity, further improved energy-absorption properties, thus is useful as closed cross section structure materials 11-15 for cars, particularly pillars 11-13, roof rails 14, side sills 15 for the body 10 of a high class car.</p> |
