EP 4244289 A1 20230920 - METHOD FOR THE CONTINUOUS PREPARATION OF FORMULATED POLYAMIDE PREPOLYMERS
Title (en)
METHOD FOR THE CONTINUOUS PREPARATION OF FORMULATED POLYAMIDE PREPOLYMERS
Title (de)
VERFAHREN ZUR KONTINUIERLICHEN HERSTELLUNG VON FORMULIERTEN POLYAMIDPREPOLYMEREN
Title (fr)
PROCEDE DE PREPARATION EN CONTINU DE PREPOLYMERES DE POLYAMIDES FORMULES
Publication
Application
Priority
- FR 2011600 A 20201112
- FR 2021051987 W 20211110
Abstract (en)
[origin: WO2022101580A1] The present invention relates to 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 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 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 including the introduction of at least one additive during said polycondensation step in the extruder.
IPC 8 full level
C08L 77/00 (2006.01); B29C 48/40 (2019.01); C08G 69/04 (2006.01); C08G 69/28 (2006.01)
CPC (source: EP KR US)
B29C 48/022 (2019.02 - EP KR); B29C 48/288 (2019.02 - EP KR); B29C 48/29 (2019.02 - EP KR); B29C 48/405 (2019.02 - EP KR); B29C 48/762 (2019.02 - EP KR); C08G 69/04 (2013.01 - EP KR); C08G 69/10 (2013.01 - US); C08G 69/16 (2013.01 - KR); C08G 69/28 (2013.01 - EP KR); C08J 3/212 (2013.01 - US); C08L 77/00 (2013.01 - EP); B29K 2077/00 (2013.01 - EP KR); B29K 2105/0002 (2013.01 - EP KR); B29K 2105/0058 (2013.01 - EP KR); C08J 2377/04 (2013.01 - US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
FR 3116058 A1 20220513; FR 3116058 B1 20231020; CN 116547126 A 20230804; EP 4244289 A1 20230920; JP 2023548885 A 20231121; KR 20230104924 A 20230711; US 2023407006 A1 20231221; WO 2022101580 A1 20220519
DOCDB simple family (application)
FR 2011600 A 20201112; CN 202180076149 A 20211110; EP 21820662 A 20211110; FR 2021051987 W 20211110; JP 2023527661 A 20211110; KR 20237019299 A 20211110; US 202118251790 A 20211110