Document Type and Number:
Japanese Patent JPH0552333
Kind Code:
B2
Abstract:
Nylons are prepared by a continuous process in which, in a precondensation zone, an aqueous solution of a salt of a dicarboxylic acid of 6 to 18 carbon atoms and a diamine of 6 to 18 carbon atoms is heated to 250 DEG -300 DEG C. under superatmospheric pressure, with simultaneous vaporization of water and formation of a prepolymer, the prepolymer and the vapor are separated, and the former is fed into a polycondensation zone and condensed under superatmospheric pressure of from 1 to 10 bar and at from 250 DEG to 300 DEG C., wherein the aqueous salt solution is condensed under superatomspheric pressure of from 1 to 10 bar in the first third of the tubular precondensation zone provided with baffles, until the degree of conversion is not less than 93%, and the prepolymer and the vapor phase are brought into intimate contact with one another in the remaining two thirds of the precondensation zone.
Inventors:
GUNTAA PIPAA
FURANTSU SHUMITO
RAINAA TEIZOON
ZUIIKUFURIITO RIIGAA
EDOARUTO HAIRU
HERUMAN FUISHAA
RIHIARUTO TOOMA
PAURU MACHIISU
FURANTSU SHUMITO
RAINAA TEIZOON
ZUIIKUFURIITO RIIGAA
EDOARUTO HAIRU
HERUMAN FUISHAA
RIHIARUTO TOOMA
PAURU MACHIISU
Application Number:
JP12008984A
Publication Date:
August 05, 1993
Filing Date:
June 13, 1984
Export Citation:
Assignee:
BASF AG
International Classes:
C08G69/00; C08G69/26; C08G69/28; C08L77/00; (IPC1-7): C08G69/28
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