Translucent and opaque impact modifiers for polylactic acid

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 67/04 (2006.01) C08L 1/02 (2006.01) C08L 3/02 (2006.01) C08L 5/00 (2006.01) C08L 53/02 (2006.01) C08L 101/16 (2006.01)

Patent

CA 2669554

The invention relates to a blend of one or more biodegradable polymers with one or more impact modifiers, for the purpose of improving the impact properties of the biodegradable polymer(s). The biodegradable polymer is preferably a polylactide or polyhydroxy butyrate. The composition comprises 30-99.9 weight percent ofodegradable polymer and 0.1 to 15 weight percent of one or more impact modifiers. Haze levels can be controlled by the composition and percentage of impact modifier (or modifiers) selected, to produce a polymer composition having an appearance ranging from translucent to opaque.

L'invention concerne un mélange d'un ou plusieurs polymères biodégradables avec un ou plusieurs agents antichoc en vue d'une amélioration des propriétés antichoc du ou des polymères biodégradables. Le polymère biodégradable est de préférence un polylactide ou un polyhydroxy-butyrate. La composition comprend entre 30 et 99,9% en poids d'un polymère dégradable et entre 0,1 et 15% en poids d'un ou plusieurs agents antichoc. Les degrés de trouble peuvent être régulés au moyen de cette composition et le pourcentage du ou des agents antichoc peut être sélectionné, ce qui permet de produire une composition polymère présentant un aspect allant de translucide à opaque.

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