C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 77/00 (2006.01) C08L 77/02 (2006.01) C08L 77/06 (2006.01)
Patent
CA 2470166
The invention relates to thermoplastic compositions comprising a thermoplastic polyamide matrix and at least one additive which modifies the interaction between the matrix and an agent. The purpose of the invention is to provide an additive which modifies the interaction between a copolyamide-type thermoplastic copolyamide matrix and at least one agent. The aforementioned additive, which comprises at least one hyperbranched functionalised polymer, is not compatible with the matrix. Moreover, said additive can be used for the controlled modification of the interaction between the thermoplastic copolyamide and an internal or external chemical agent. Preferably, the composition does not contain hyperbranched polymers which produce therein a reduction in the molar mass of matrix M which is greater than or equal to 7 % in relation to a sample composition which comprises matrix M but does not contain hyperbranched polymer additive(s). Said mass measurement is taken preferably using a determined protocol P. The invention is suitable for use in moulding, injection moulding, injection/blow moulding, extrusion/blow moulding, extrusion or spinning.
L'invention concerne des compositions thermoplastiques comprenant une matrice polyamide thermoplastique et au moins un additif modificateur de l'interaction de la matrice avec un agent. Le but est de proposer un additif modificateur de l'interaction, vis à vis d'au moins un agent, d'une matrice copolyamide thermoplastique du type des copolyamides, ledit additif étant : - constitué par au moins un polymère fonctionnalisé hyperbranché - non compatible avec la matrice, - apte à permettre la modification contrôlée de l'interaction du copolyamide thermoplastique, vis à vis d'un agent chimique interne ou externe. Sont de préférence exclus les polymères hyperbranchés entraînant dans la composition une diminution de la masse molaire de la matrice M supérieure ou égale à 7% par rapport à une composition témoin comportant une matrice M et exempte d'additif(s) polymères hyperbranchés, la mesure de masse étant de préférence effectuée selon un protocole P déterminé. Applications : moulage, moulage par injection, injection/soufflage, extrusion/soufflage, extrusion ou filage.
Bordes Bertrand
Marchand Jean-Pierre
Paulo Christophe
Rochat Sandrine
Sassi Jean-Francois
Rhodianyl
Robic
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