公开(公告)号：US20240010793A1

公开(公告)日：2024-01-11

申请号：US18252011

申请日：2021-11-10

Applicant: ARKEMA FRANCE

Inventor： Sébastien QUINEBECHE ,  Thierry BRIFFAUD ,  Gérald ROMAZINI

IPC: C08G69/30 ,  C08G69/06 ,  B29B7/82 ,  B29B7/48

CPC classification number: C08G69/30 ,  C08G69/06 ,  B29B7/82 ,  B29B7/48 ,  B29K2077/00

Abstract: The present invention relates to a method for continuously preparing a polyamide prepolymer, the viscosity in solution of which is comprised between 0.25 dL/g and 0.70 dL/g, as measured according to ISO 307:2007 in m-cresol at 20° C.,



the method being characterized in that it comprises a step of polycondensation on the basis of one or more polyamide precursor monomers, said polycondensation step being carried out in a extruder comprising at least two co-rotating conveying screws, the at least one monomer being previously added therein in solid or liquid form without being dissolved in a solvent or in water, and said polycondensation step being carried out without extracting the water formed during said polycondensation.

公开(公告)号：US20230407006A1

公开(公告)日：2023-12-21

申请号：US18251790

申请日：2021-11-10

Applicant: ARKEMA FRANCE

Inventor： Sébastien QUINEBECHE ,  Gérald ROMAZINI ,  Pierrick ROGER-DALBERT ,  Thierry BRIFFAUD

IPC: C08G69/10 ,  C08J3/21

CPC classification number: C08G69/10 ,  C08J3/212 ,  C08J2377/04

Abstract: A method for continuously preparing a formulated polyamide prepolymer, of which the solution viscosity is from 0.25 dL/g to 0.70 dL/g, as measured according to ISO 307:2007 in m-cresol at 20° C., the method including a step of polycondensation on the basis of one or more polyamide precursor monomers, said polycondensation step being carried out in an extruder comprising at least two co-rotating conveying screws, the at least one monomer being previously fed therein in solid or liquid form without being dissolved in a solvent or in water, and said polycondensation step being carried out without extraction of the water formed during said polycondensation step and comprising the addition of at least one additive during said polycondensation step in the extruder.