The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 20, 1977
Filed:
Sep. 02, 1975
Helmut Doerfel, Heidelberg, DT;
Claus Cordes, Weisenheim, DT;
BASF Aktiengesellschaft, Ludwigshafen, DT;
Abstract
A process for continuous production of polyamides by continuous transport of a mixture of one or more lactams and from 1 to 15% and preferably from 3 to 8% of water and optionally other polyamide-forming compounds such as the salts of dicarboxylic acids and diamines or aminocarboxylic acids through a number of reaction zones under polyamide-forming conditions, said mixture of starting materials being heated in a first reaction zone to temperatures of from 210.degree. to 330.degree. C and preferably from 220.degree. to 280.degree. C, whereupon the polycondensation mixture is adiabatically vented in a further reaction zone and is then polymerized to completion in yet another reaction state to form high molecular weight polyamides. The process is characterized in that