Method for the preparation of pre-reinforced and reinforced...

C - Chemistry – Metallurgy – 08 – J

Patent

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C08J 3/20 (2006.01) B29B 7/40 (2006.01) C08K 3/00 (2006.01)

Patent

CA 2741968

The invention relates to a method for the preparation of a reinforced polyvinyl chloride device comprising the steps: a) preparation of a pre-reinforced polymer by mixing polyvinyl chloride polymer with a quantity A of a naturally occurring mineral filler at a temperature lower than the melting temperature of the polyvinyl chloride polymer; and b) mixing the pre-reinforced polymer obtained under a) with a quantity B of a naturally occurring mineral filler at a temperature higher than 180 °C to obtain a reinforced polyvinyl chloride polymer.

La présente invention concerne un procédé de préparation d'un dispositif en chlorure de polyvinyle renforcé qui comprend les étapes suivantes: a) préparation d'un polymère pré-renforcé par mélange d'un polymère de chlorure de polyvinyle avec une quantité A d'une charge minérale d'origine naturelle à une température inférieure à la température de fusion du polymère de chlorure de polyvinyle; et b) mélange du polymère pré-renforcé obtenu dans l'étape a) avec une quantité B d'une charge minérale d'origine naturelle à une température supérieure à 180 °C pour obtenir un polymère de chlorure de polyvinyle renforcé.

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