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1. WO2020008133 - METHOD FOR PRODUCING A COPOLYMER FOAM WITH POLYAMIDE BLOCKS AND POLYETHER BLOCKS

Publication Number WO/2020/008133
Publication Date 09.01.2020
International Application No. PCT/FR2019/051625
International Filing Date 02.07.2019
IPC
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
J
WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
9
Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
04
using blowing gases generated by a previously added blowing agent
12
by a physical blowing agent
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
J
WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
9
Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
04
using blowing gases generated by a previously added blowing agent
12
by a physical blowing agent
14
organic
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
J
WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
9
Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
C08J 9/12 (2006.01)
C08J 9/14 (2006.01)
C08J 9/00 (2006.01)
CPC
C08J 2203/06
C08J 2203/14
C08J 2203/16
C08J 2371/02
C08J 2377/00
C08J 2423/08
Applicants
  • ARKEMA FRANCE [FR/FR]; 420 rue d'Estienne d'Orves 92700 Colombes, FR
Inventors
  • COCQUET, Clio; FR
  • CHEMINET, Helena; US
  • DEYRAIL, Yves; FR
  • DURIN, Audrey; FR
  • MIRALLES, Marc; FR
Agents
  • BANDPAY & GREUTER; 30 rue Notre Dame des Victoires 75002 Paris, FR
Priority Data
185612803.07.2018FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) METHOD FOR PRODUCING A COPOLYMER FOAM WITH POLYAMIDE BLOCKS AND POLYETHER BLOCKS
(FR) PROCEDE DE FABRICATION D'UNE MOUSSE DE COPOLYMERE A BLOCS POLYAMIDES ET A BLOCS POLYETHERS
Abstract
(EN)
The invention relates to a method for producing a copolymer foam with polyamide blocks and polyether blocks, comprising the following steps: - mixing copolymer in a melted state with a blowing agent, said copolymer having a thermal diffusivity coefficient a and a crystallization temperature Tc; - providing a mold with a thickness h at a temperature Tm; - injecting the mixture of the copolymer and the blowing agent at a temperature TP into the closed mold; - allowing the mixture to foam through the opening of the mold; in which the holding time between injecting the copolymer and blowing agent mixture into the closed mold and opening the mold is included in the range from (topt - 25%) to (topt + 25%), topt being expressed in seconds and obtained through equation (l): in which a is expressed in m2/s, h is expressed in m and Tm, and Tc and TP are expressed in °C.
(FR)
L'invention concerne un procédé de fabrication d'une mousse de copolymère à blocs polyamides et à blocs polyéthers, comprenant les étapes suivantes : - le mélange du copolymère à l'état fondu et avec un agent d'expansion, ledit copolymère ayant un coefficient de diffusivité thermique a et une température de cristallisation Tc; - la fourniture d'un moule d'épaisseur h à une température Tm; - l'injection du mélange du copolymère et de l'agent d'expansion à une température Tp, dans le moule fermé; - le moussage du mélange par l'ouverture du moule; dans lequel le temps de maintien entre l'injection du mélange du copolymère et de l'agent d'expansion dans le moule fermé et l'ouverture du moule est compris dans la gamme allant de (topt - 25 %) à (topt + 25 %), topt étant exprimé en secondes et obtenu par l'équation (I): dans laquelle a est exprimé en m2/s, h est exprimé en m et Tm, Tc et TP sont exprimés en °C.
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