EP 0000142 B1 19800820 - PROCESS FOR THE PREPARATION OF POLYAMIDES
Title (en)
PROCESS FOR THE PREPARATION OF POLYAMIDES
Publication
Application
Priority
DE 2728931 A 19770627
Abstract (en)
[origin: US4251653A] A process for the manufacture of nylons by heating an aqueous solution of a salt of an alkanedicarboxylic acid of 6 to 12 carbon atoms and a diamine of the formula NH2RNH2, where R is alkylene of 6 to 12 carbon atoms or is a radical <IMAGE> to a temperature at which a nylon is formed, under superatmospheric pressure and with removal of water. The solution used is an aqueous solution of from 75 to 90 percent strength by weight of a salt of a dicarboxylic acid and a diamine, which solution has been obtained by neutralizing a less concentrated salt solution, which contains an appropriate dissolved excess of the particular dicarboxylic acid, with the corresponding diamine. The nylons obtained are used for the manufacture of moldings.
IPC 1-7
IPC 8 full level
C08G 69/28 (2006.01); C08G 69/00 (2006.01)
CPC (source: EP US)
C08G 69/28 (2013.01 - EP US)
Designated contracting state (EPC)
BE DE FR GB NL
DOCDB simple family (publication)
EP 0000142 A1 19790110; EP 0000142 B1 19800820; DE 2728931 A1 19790104; DE 2860225 D1 19801204; IT 1096578 B 19850826; IT 7824768 A0 19780620; JP S5411999 A 19790129; JP S6315297 B2 19880404; US 4251653 A 19810217
DOCDB simple family (application)
EP 78100150 A 19780614; DE 2728931 A 19770627; DE 2860225 T 19780614; IT 2476878 A 19780620; JP 7659078 A 19780626; US 91374878 A 19780608