Global Patent Index - EP 0000157 B1

EP 0000157 B1 19810401 - PROCESS FOR THE MANUFACTURE OF HIGHLY CONCENTRATED AQUEOUS SOLUTIONS OF SALTS OF DICARBOXYLIC ACIDS WITH DIAMINES AND/OF POLYAMIDE PRECONDENSATES AND THEIR USE

Title (en)

PROCESS FOR THE MANUFACTURE OF HIGHLY CONCENTRATED AQUEOUS SOLUTIONS OF SALTS OF DICARBOXYLIC ACIDS WITH DIAMINES AND/OF POLYAMIDE PRECONDENSATES AND THEIR USE

Publication

EP 0000157 B1 19810401 (DE)

Application

EP 78100175 A 19780616

Priority

DE 2728817 A 19770627

Abstract (en)

[origin: US4213884A] A process for the manufacture of a highly concentrated aqueous solution of a salt of a dicarboxylic acid and a diamine, as well as of a nylon precondensate, by reacting 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 <IMAGE> <IMAGE> An aqueous solution, of lower concentration, of a salt of a dicarboxylic acid and a diamine, containing an appropriate dissolved excess of the particular dicarboxylic acid, is reacted with the particular diamine in the molten state, in an equivalent amount to the dissolved dicarboxylic acid, the reaction being carried out under superatmospheric pressure and the final reaction temperature being kept at from 140 DEG to 210 DEG C. The solution obtained is used for the manufacture of a nylon.

IPC 1-7

C07C 55/02; C08G 69/28; C07C 55/14; C07C 51/41

IPC 8 full level

C07C 51/00 (2006.01); C07C 51/41 (2006.01); C07C 55/14 (2006.01); C07C 67/00 (2006.01); C07C 55/02 (2006.01); C07C 209/00 (2006.01); C07C 211/09 (2006.01); C07C 211/36 (2006.01); C07C 231/00 (2006.01); C07C 231/02 (2006.01); C07C 231/24 (2006.01); C07C 233/36 (2006.01); C07C 233/41 (2006.01); C08G 69/28 (2006.01)

CPC (source: EP US)

C07C 51/412 (2013.01 - EP US); C08G 69/28 (2013.01 - EP US)

C-Set (source: EP US)

  1. C07C 51/412 + C07C 55/14
  2. C07C 51/412 + C07C 55/02

Designated contracting state (EPC)

BE DE FR GB NL

DOCDB simple family (publication)

EP 0000157 A1 19790110; EP 0000157 B1 19810401; DE 2728817 A1 19790104; DE 2860572 D1 19810423; IT 1096586 B 19850826; IT 7824766 A0 19780620; JP S5412316 A 19790130; JP S626534 B2 19870212; US 4213884 A 19800722

DOCDB simple family (application)

EP 78100175 A 19780616; DE 2728817 A 19770627; DE 2860572 T 19780616; IT 2476678 A 19780620; JP 7659178 A 19780626; US 91364178 A 19780608