Process for producing a filled polymer material

Details Process for producing a filled polymer material Process for producing a filled polymer material

C - Chemistry, Metallurgy

08

J

C08J 3/00 (2006.01)

Patent

CA 2719479

The invention relates to a method for producing a thermoplastic polymer material that is filled with at least one fil-ler, preferably calcium carbonate CaCO3, sensitive to hydrolytic degradation and optionally hygroscopic, and produced by way of polycondensation, particularly PET, wherein under vacuum conditions, constant stirring or mixing and an increased temperature, a mixture of not yet melted, optionally softened, polymer material comprising the filler is produced, wherein for this purpose a fil-ler, which at the time of addition has not been predried and has a residual moisture (H20) of more than 500 ppm, particularly more than 1000 ppm, is used.

L'invention concerne un procédé de fabrication d'un matériau polymère, en particulier de PET, produit par polycondensation, thermoplastique, éventuellement hygroscopique et sensible à la dégradation hydrolytique, ce matériau polymère étant chargé d'au moins une matière de charge, de préférence de carbonate de calcium CaCO3. Selon ce procédé, un mélange contenant le matériau polymère non encore fondu, éventuellement ramolli, et la matière de charge est produit dans des conditions de vide sous l'action d'une agitation constante ou d'un malaxage et en présence d'une température accrue, la matière de charge utilisée à cet effet n'étant pas préséchée au moment de l'addition et présentant une humidité résiduelle (H2O) supérieure à 500 ppm, en particulier supérieure à 1000 ppm.

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