Method for continuously producing polyamide oligomers and producing semicrystalline or amorphous polyamides that can be thermoplastically processed

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United States of America Patent

PATENT NO 10676569
APP PUB NO 20160130397A1
SERIAL NO

14896780

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Abstract

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The invention relates to a process for continuously preparing polyamide oligomers. This comprises continuous conveying of an aqueous solution of polyamide-forming monomers from a reservoir vessel into an oligomerization reactor, heating of the aqueous solution beyond a dissolution or storage temperature, the residence time of the monomer solution in the oligomerization reactor being limited and the pressure or the partial vapor pressure of the water being adjusted such that a conversion of monomers to polyamide oligomers does not exceed a maximum value and/or the polyamide oligomers formed do not phase-separate or spontaneously crystallize in solid form, and continuous discharge of the polyamide oligomers from the oligomerization reactor. A polyamide oligomer preparable by this process can be provided continuously in a mixture with water in a process for preparing a semicrystalline or amorphous, thermoplastically processible polyamide and then postcondensed to give a polyamide. This polyamide can be used for production of moldings by means of injection molding, multicomponent injection molding, injection molding/welding, extrusion, coextrusion, blow molding or thermoforming.

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Patent Owner(s)

Patent OwnerAddress
BASF SECARL-BOSCH-STRASSE 38 LUDWIGSHAFEN AM RHEIN 67056

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Biedasek, Silke Ludwigshafen, DE 14 30
Clauss, Joachim Darmstadt, DE 30 296
Kory, Gad Gaiberg, DE 21 93
Queiroz, Da Fonseca Isa Alexandra Ludwigshafen, DE 8 48
Rauschenberger, Volker Eisenberg, DE 16 223
Richter, Florian Mannheim, DE 38 95
Sack, Heinrich Hassloch, DE 15 102
Schmidt, Christian Ludwigshafen, DE 142 944
Schneller, Arnold Seeheim-Jugenheim, DE 56 763
Schwiegk, Stefan Neustadt, DE 16 98
Stammer, Achim Freinsheim, DE 62 411
Wilms, Axel Frankenthal, DE 30 177
Zhu, Ning Mannheim, DE 136 1600

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