Corrosion resistant epoxy resin aggregate compositions and porous article made therefrom

Claim 1

A MOLDABLE SELF-SETTABLE COMPOSITION CAPABLE OF HARDENING TO A FLUID-PERMEABLE THERMOSET COMPOSITION CONSISTING ESSENTIALLY BY WEIGHT OF AN INTIMATE MIXTURE OF (1) BETWEEN ABOUT 40 PERCENT AND ABOUT 80 PERCENT OF AN AGGREGATE SELECTED FROM THE CLASS CONSISTING OF PULVERIZED CALCINED PETROLEUM COKE AND PULVERIZED CARBON, SAID AGGREGATE HAVING A PARTICLE SIZE SUCH THAT NOT MORE THAN ABOUT 10 PERCENT BY WEIGHT IS RETAINED ON A 2.5 MESH SIEVE AND NOT MORE THAN ABOUT 10 PERCENT BY WEIGHT PASSES THROUGH A 140 MESH SIEVE; (2) BETWEEN ABOUT 8 PERCENT AND ABOUT 45 PERCENT OF A DIGLYCIDYL ETHER PREPARED BY REACTING A MOLAR EXCESS OF EPICHLOROHYDRIN WITH 4,4''-ISOPROPYLIDENEDIPHENOL IN THE PRESENCE OF AN AQUEOUS SOLUTION OF NAOH AND HAVING AN EPOXIDE EQUIVALENT WEIGHT OF BETWEEN 174 AND 575 AND CONTAINING A CROSS-LINKING AGENT FOR THE OXIRANE GROUPS PRESENT SELECTED FROM THE CLASS CONSISTING OF DIETHYLENETRIAMINE, TRIETHYLENETETRAMINE, AND MIXTURES THEREOF, AND POLYAMIDES PREPARED BY CONDENSING A MIXTURE OF (A) DIMERIZED AND TRIMERIZED UNSATURATED FATTY ACIDS AND (B) ARYL AND ALKYL POLYAMINES; AND (3) A FINELY SUBDIVIDED PULVERULENT THICKENING FILLER SELECTED FROM THE CLASS CONSISTING OF POWDERED CARBON AND POWDERED GRAPHITE OF A SIZE THAT AT LEAST ABOUT 80 PERCENT PASSES THROUGH A 140 MESH SIEVE, IN AN EFFECTIVE AMOUNT OF SAID FILLER TO IMPART SUFFICIENT FLUIDITY AND ADHESIVE PROPERTIES TO THE RESIN, WHEN ADMIXED THEREWITH, TO FORM A SUBSTANTIALLY UNIFORM COATING THEREOF ABOUT THE AGGREGATE PARTICLES.