PURPOSE: To easily mold a chipboard or the like by a method wherein a base material such as wood, bark or the like is compression-molded with a polyisocyanate, a compound containing two or more isocyanate-reactive hydrogen atoms and an alkylene carbonate.
CONSTITUTION: A binder is prepared by compounding a polyisocyanate (a), a compound (b) containing at least two isocyanate-reactive hydrogen atoms and an alkylene carbonate (c) with one another. This binder is given to a base material in the shape such as granular matters, shavings, chips or the like made of wood, bard, cork, bagasse, straw, flax, bamboo, chaff or the like so as to thermally compress at a temperature such as 70-250°C at a pressure such as 1-150 bar in order to mold a board or a three-dimensionally shaped molding. The preferable vesting amount of the binder to the base material is 0.5-20 wt.%. The preferable compounding of the binder is 10-250 pts.wt. of (b) and of (c) to 100 pts.wt. of (a).
HANSU INMO ZATSUHASU
PEETERU KASUPURUTORUKU
DONARUDO RIHIYARUTO RARIMERU
