| 摘要 |
THE INVENTION RELATES TO A METHOD FOR PRODUCING POLYAMIDES BY REACTING AMINO CARBOXYLIC ACID COMPOUNDS OF GENERAL FORMULA &Igr; IN WHICH R¹ RPRESENTS OH,O-C₁-₁₂-ALKYL OR NR²R³ WITH R² AND R³ INDEPENDENT OF ONE ANOTHER,REPRESENTING HYDROGEN, C₁-₁₂-ALKYL OR C₅-₈-CYCLOAKLYL,AND REPRESENT A WHOLE NUMBER BETWEEN 3 AND 12.SAID COMPOUNDS ARE OPTIANALLY REACTED IN THE MIXTURE WITH AMINO NITRILES AND THE HYDROLYSIS PRODUCT THEREOF AND ARE OPTIONALLY REACTED IN THE PRESNCE OF WATER.IN ADDITIONAL, THE COMPOUND ARE RESCTED IN LIQUID PHASE WHILE BEING SUBJECTED TO AN INCREASED TEMPERATURE,AND IN THE PRESENCE OF MATAL OXIDES AS HETEROGENEOUS CATALYST,WHEREBY THE METAL OXIDES ARE PALCED INSIDE A MOLD WHICH PERMITS MECHANICAL SEPARATION FROM THE REACTION MIXTURE AND ARE REMOVED FROM THE REACTION MIXTURE DURING OR AFTER COMPLETION OF THE POLYMERIZATION.
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