Method for the preparation of polyureas

Claim 1

THE PROCESS OF PRODUCCING A POLYUREA COPOLYMER WHICH COMPRISES HEATING AT LEAST ONE AMINE COMPOUND FROM THE CLASS CONSISTING OF PROMARY DIAMINES HAVING TWO TERMINAL PRIMARY AMINE GROUPS AND A CONNECTING ALIPHATIC HYDROCARBON CHAIN WHEREIN AT LEAST ONE CARON ATOM OF SAID CHAIN IS BONDED TO AN ALKYL GROUP OF NO MORE THAN 10 CARBON ATOMS, SAID DIAMINES CONTAINING A TOTAL OF 3-20 CARBON ATOMS TO THE MOLECULE AND CARBONATES THEREOF A POLYMETHYLENE DIAMINE COMPOUND FROM THE CLASS CONSISTING OF A PRIMARY STRAIGHT-CHAINED POLYMETHYLENE DIAMINE HAVING A TOTAL OF 2-20 CARBON ATOMS TO THE MOLECULE AND CARBONATES THEREOF AND A UREA COMPOUND FROM THE CLASS CONSISTING OF UREA, DIURREA, METHYLENE DIUREA, ETHYLENE DIUREA, METHYLENE DITHIOUREA AND ETHYLENE DITHIOUR IN AN INERT GAS ATMOSPHERE AT A TEMPERATURE OF ABOUT 80*C.-130*C. WITH THE EVOLUTION OF AM MONIA FOR A PERIOD OF TIME UNTIL THE EVOLUTION OF AMMONIA CEASES, CONTINUING HEATING AT A TEMPERATUREIN THE APPROXIMATE RANGE OF 140*C.-190*C. WITH THE FURTHER EVOLUTION OF AMMONIA FOR A PERIOD OF TIME UNTIL THE EVOLUTION OF AMMONIA CEASES AND SUBSEQUENTLY CONTINUING HEATING AT A TEMPERATURE OF ABOUT 200*C.-280*C.