Olefinic thermoplastic polymer compositions with fillers of...

C - Chemistry – Metallurgy – 08 – L

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C08L 23/08 (2006.01) C08K 3/34 (2006.01)

Patent

CA 2525794

The invention relates to thermoplastic polymer compositions in the form of masterbatches, comprising a matrix of an olefinic copolymer obtained from olefinic monomers and at least one alkyl (meth)acrylate monomer, in which exfoliable organophile fillers of the lamellar type are dispersed, such as silicates, characterised in that after complete dispersion, the fillers are of nanometre scale with a content of at least 20 % by weight with relation to the composition. The invention is further of application for the production of polymeric materials particularly of the polyethylene type, with fillers, the thermomechanical and barrier properties of which are improved.

La présente invention concerne des compositions de polymères thermoplastiques sous forme de mélanges-maîtres, comprenant une matrice constituée d'un copolymère oléfinique obtenu à partir de monomères oléfiniques, et d'au moins un monomère de (méth)acrylate d'alkyle, dans laquelle sont dispersées des charges organophiles exfoliables de type lamellaires telles que des silicates, caractérisées en ce que les charges après dispersion complète sont de taille nanométrique et que leur teneur est d'au moins 20% en poids par rapport à la composition. L'invention trouve aussi une application pour la réalisation de matériaux polymériques notamment du type polyéthylène, chargés dont les caractéristiques thermomécaniques et les propriétés barrières sont améliorées.

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