The resulting composite after gradual cooling to room temperature to was broken up and comminuted in a hammer mill to an average particle size of 0.25 mm in diameter and combined with resin and binding agent as in the initial molding step.
The molding procedure for the resulting blend was essentially repeated but using the comminuted acrylic resin containing aggregate in place of the initial sand aggregate. The mold used in this second step was in the from of the final desired product such as to result in a rectangular slab having a thickness which could be varied to having a thickness of 10 to 30 mm. The resulting composite had a density of 2.5 g/cc and could be polished to provide a surface undistin-guishable from a polished natural stone surface and was readily bonded with a polyurethane adhesive to an aluminum honeycomb sheet