Abstract: Disclosed is a composite material including from about 50 wt % to about 75 wt % (based on the total weight of the composite material) of inorganic material, wherein the inorganic material includes from about 30 wt % to about 50 wt % (based on weight of the inorganic material) of a first inorganic filler having an average particle size ranging from about 0.5 mm to about 5 mm; and from about 50 wt % to about 70 wt % (based on weight of the inorganic filler) of a second inorganic filler having an average particle size ranging from 0.02 mm to about 0.1 mm; and from about 25 wt % to about 50 wt % (based on total weight of the composite material) of a thermosetting polymeric resin.

Abstract: Disclosed is a composite material including from about 50 wt % to about 75 wt % (based on the total weight of the composite material) of inorganic material, wherein the inorganic material includes from about 30 wt % to about 50 wt % (based on weight of the inorganic material) of a first inorganic filler having an average particle size ranging from about 0.5 mm to about 5 mm; and from about 50 wt % to about 70 wt % (based on weight of the inorganic filler) of a second inorganic filler having an average particle size ranging from 0.02 mm to about 0.1 mm; and from about 25 wt % to about 50 wt % (based on total weight of the composite material) of a thermosetting polymeric resin.

Abstract: A composite material that includes from about 18 wt % to about 22 wt % of a thermosetting polymeric resin; and from about 82 wt % to about to about 78 wt % of an inorganic filler, wherein the inorganic filler comprises a mixture of particles wherein about 20 parts by weight of the mixture has an average particle size of about 10 ?m or larger, about 15 parts by weight of the mixture has an average particle size of from less than 10 ?m to about 5 ?m, and about 10 parts by weight of the mixture has an average particle size of from about 3 to about 1 ?m.

Abstract: A composite material that includes from about 18 wt % to about 22 wt % of a thermosetting polymeric resin; and from about 82 wt % to about to about 78 wt % of an inorganic filler, wherein the inorganic filler comprises a mixture of particles wherein about 20 parts by weight of the mixture has an average particle size of about 10 &mgr;m or larger, about 15 parts by weight of the mixture has an average particle size of from less than 10 &mgr;m to about 5 &mgr;m, and about 10 parts by weight of the mixture has an average particle size of from about 3 to about 1 &mgr;m.