Thermoplastic polymer composition containing black iron oxide

Details Thermoplastic polymer composition containing black iron oxide Thermoplastic polymer composition containing black iron oxide

C - Chemistry, Metallurgy

08

K

C08K 3/22 (2006.01)

Patent

CA 2314966

Disclosed herein is a thermoplastic polymer composition comprising a blend of a thermoplastic polymer admixed with from about to 50 ppm black iron oxide particles, based on the amount of said thermoplastic polymer. The black iron oxide is admixed with the polymer in order to speed up the process of repeating parisons formed from the polymer during bottle manufacturing. The composition has the beneficial combination of a large percent repeat rate improvement (RIV) with only a small decrease in transparency (.DELTA.L*). The ratio of RIV.DELTA.L* is significantly better than carbon black-polymer blends having similar RIV.

L'invention concerne une composition polymère thermoplastique comprenant un mélange d'un polymère thermoplastique et de particules d'oxyde de fer magnétique en quantité comprise entre 5 et 50 mg/l environ, par rapport à la quantité de polymère thermoplastique. L'oxyde de fer magnétique est mélangé au polymère pour accélérer le processus de réchauffement des paraisons formées à partir dudit polymère lors de la fabrication des bouteilles. La composition présente l'avantage de combiner une nette amélioration du taux de réchauffement (RIV) et seulement une légère diminution de la transparence ( DELTA L*). La proportion de RIV/ DELTA L* est sensiblement meilleure que celle des mélanges de noir de carbone et de polymères ayant un taux de réchauffement similaire.

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