| 摘要 |
<p>A process for recycling waste thermoset plastics which are not fibre-reinforced comprises granulating the waste thermoset plastics material to a particle size of 0.2 mm or less, mixing the granulate with a phenol resin, a hardener, e.g. hexamethylene tetramine, and optionally, processing aids e.g. Me stearates where Me Al, Ca, Mg, Li and/or Zn, a lubricant e.g. wax, or fillers, e.g. chalk, and/or reinforcement materials, e.g. cut glass fibres, and subsequently homogenising the mixture, e.g. by action of strong shearing forces. The resulting compound after cooling may be ground to a granulated material of particle size less than 2 mm, and can be used as a moulding compound to form new plastic articles by injection- or compression-moulding processes. The waste plastics may be based on phenol, melamine, urea or unsaturated polyester resins.</p> |
