Process for the production of high impact type castings by the copolymerization of epoxy compounds with amines

Claim 1

THE PROCESS FOR THE PRODUCTION OF TOUGH, HIGH-IMPACT TYPE, OPEN MOLD CASTINGS THROUGH TH COPOLYMERIZATION OF EPOXY COMPOUNDS WITH AMINES WHILE CONTROLLING THE EXOTHERMIC HEAT OF REACTION DURING SAID PRODUCTION, WHICH COMPRISES: PROVIDING AN EPOXY COMPOUND HAVING ONLY TERMINAL 1,2-EPOXY GROUPS, WITH NO OTHER CYCLIC STRUCTURE OR FUNCTIONAL GROUPS IN THEIR MOLECULAR STRUCTURE, AND WHEREIN THE NUMBER OF SAID EPOXY GROUPS IS A NUMBER FROM 3 TO 4; ADMIXING WITH SAID EPOXY COMPOUND A PRIMARY MONO AMINE, THE AMOUNT OF SID AMINE BEING SUCH THAT THERE IS ONE AMINO HYDROGEN FOR EACH SAID 1,2-EPOXY GROUP OF SAID EPOXY COMPOUND, AND SAID AMINE BEING ONE WITH THE NITROGEN ATOM ATTACHED TO A CARBON ATOM OF A SIX-CARBON RING HAVING NO OTHER FUNCTIONAL GROUP ATTACHED TO SAID RING; STIRRING THE MIXTURE TO KEEP THE TEMPERATURE THEREIN SUBSTANTIALLY UNIFORM THERETHROUGH WHILE EXTRACTING HEAT OF REACTION THROUGH HEAT EXCHANGE SURFACES TO HOLD THE TEMPERATURE OF SAID MIXTURE AT ABOUT 40*C. TO 80*C. UNTIL SAID LIQUID MASS EVIDENCES SUBSTANTIALLY NO TENDENCY TO RISE IN TEMPERATURE, WHEREBY THE PRODUCT FORMED IS AN UNPOLYMERIZED INTERMEDIATE CHARACTERIZED BY ITS ABILITY TO REMAIN IN SUCH STATE OVER A PROLONGED PERIOD OF TIME; SUBSEQUENTLY TRANSFERRING SAID LIQUID MASS TO AN OPEN CASTING MOLD; RAISING ITS TEMPERATURE TO BETWEEN ABOUT 140*C. AND 160*C. AND HOLDING IT AT SAID TEMPERATURE FOR A PERIOD OF TIME, THEREBY TO FORM SAID MASS INTO A POLYMERIZED BODY HAVING ALL AMINO-TYPE POLYMERIZATION LINKAGE THEREIN.