Material having high mechanical strength and density close to unity, the manufacture and uses thereof

摘要

A material with high mechanical strength and a density close to 1 is obtained by: (a) dispersing on weight basis 10-15% of a melamine-formol resin, 10-50% of hollow microspheres, and optionally up to 60% of light aggregates, in water; (b) mixing the resultant dispersion in the presence of a cross-linking catalyst, e.g., ammonium chloride, for the melamine-formol resin, until a fluid paste is obtained; and (c) allowing said fluid paste to harden into the desired material.