Method for the manufacture of carbon foam

Claim 1

IN THE ART OF PREPARING A CELLULAR CARBONACEOUS PRODUCT COMPRISING THE STEPS OF ADMIXING PARTIALLY POLYMERIZED FURFURYL ALCOHOL CONTAINING LESS THAN 12 MOLE PER CENT OF THE ALCOHOL MONOMER AND POSESSING A VISCOSITY IN THE RANGE OF ABOUT 10,000 TO 14,000 CENTIPOISE WITH WATER AND URETHANE COMPOUNDS CAPABLE OF INTERACTING TO FORM A CELLULAR URETHANE STRUCTURE AND CONSISTING ESSENTIALLY OF A POLYHYDRIC URETHANE AND DIISOCYANATE FORMING A CELLULAR URETHANE STRUCTURE BY THE INERACTION OF THE URETHANE COMPOUNDS, HEATING THE CELLULAR URETHANE STRUCTURE TO A TEMPERATURE BELOW THE DECOMPOSITION TEMPERATURE OF THE URETHANE AND SUFFICIENT TO CURE THE FURFURYL ALCOHOL, AND THEREAFTER HEATING THE CELLULAR STRUCTURE TO A TEMPERATURE GREATER THAN THE DECOMPOSITION TEMPERATURE OF THE URETHANE AND SUFFICIENT TO CARBONIZE THE FURFURYL ALCOHOL FOR FORMING THE CELLULAR CARBONACEOUS PRODUCT; THE IMPROVEMENT CONSISTING OF FORMING A HOMOGENEOUS PREMIX OF THE PARTIALLY POLYMERIZED FURFURYL ALCOHOL, WATER AND POLYHYDRIC ALCOHOL BY THE STEPS OF COMBINING THE PARTIALLY POLYMERIZED FURFURYL ALCOHOL, WATER AND POLYHYDRIC ALCOHOL, AGITATING THE COMBINED IGREDIENTS FOR HOMOEGENEOUSLY MIXING THE LATTER WHILE SIMULTANEOUSLY SHEARING THE PARTIALLY POLYMRIZED FURFURYL ALCOHOL FOR REDUCING THE VISCOSITY IN THE RANGE OF 4,000 TO IZED FURFURYL ALCOHOL TO A VISCOSITY IN THE RANGE OF 4,000 TO 6,000 CENTIPOISE AND FOR HEATING THE MIXTURE TO A TEMPERATYRE DUE OF AT LEAST ABOUT 35*C TO INHIBIT COAGULATION IN THE PREMIX DUE TO A REACTION ABOUT 35*C TO INHIBT COAGULATION IN THE PREMIX DUE CONTINUING SAID AGITATION AND SAID SHEARING TO MAINTAIN THE PARTIALLY POLYMERIZED FURFURYL ALCOHOL AT A VISOCITY IN THE LAST MENTIONED RANGE AND TO CONTINUALLY ADD HEAT TO THE PREMIX CIRCULATING PREMIX IN A HEAT EXCHANGE RELATIONSHIP WITH A COOLANT FOR MAINTAINING THE PREMIX AT SAID TEMPERATURE OF AT LEAST ABOUT 35*C REMOVING A PORTION OF THE HOMEGENEOUS PREMIX, AND ADDING THE DIISOCYANATE TO SAID PORTION FOR FORMING SAID CIRCULAR URETHANE STRUCTURE BY THE INTERACTION OF THE URETHANE COMPOUNDS.