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专利名称：Process for the preparation of a polyamide发明人：CORNELIS EME KONING,RUDY
RULKENS,NICOLAAS FRANCISCUSHAASEN,ALBERT ARNOLD VAN GEENEN
申请号：AU1741001申请日：20001107公开号：AU1741001A公开日：20010709
摘要：The invention relates to a process for the preparation of a polyamidecomprising at least a step in which a composition that comprises at least (a) a primaryaminocarbonamide and (b) an aminocarboxylic acid and/or a lactam is polymerised, saidcomposition comprising at least(a) 10-90 wt. % primary aminocarbonamide;(b) 10-90 wt.% aminocarboxylic acid and/or lactam;(c) 0-4 wt. % water;the amounts being relative tothe sum of the compounds (a+b+c). Preferably the sum of the compounds (a+b+c) is atleast 75 wt. % of the total composition, more preferably 85 wt. %, most preferably 90 wt.%.The polyamide obtained with the process has a etarel of more than 2.2.The process iseminently suitable for the preparation of polyamide-6 (polycapronamide) from acomposition comprising 6-aminocapronamide, 6-aminocaproic acid and/or epsilon-caprolactam. This composition is preferably obtained via the reductive amination of a 5-formylyalerate ester, preferably 5-formylmethylvalerate in water. The 5-formylvalerateester can for example be obtained from butadiene via (a) a carbonylation and (b) ahydroformylation reaction.
申请人：DSM N.V.
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