Blends of styrene butadiene copolymers with poly(lactic acid)
AssigneeIneos Styrolution Group GmbH
InventorsThomas W. Cochran, Michael Hamilton
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Abstract
The present invention relates to a polymer blend comprising 75-99.5% (w/w) of at least one polylactic acid) (PLA) and 0.5-25% (w/w) of at least one styrene butadiene copolymer containing at least 50% (w/w) styrene. The present invention further relates to the use of such polymer blend for producing products and to the resulting products. Moreover, an object of the present invention is the use of a styrene butadiene block copolymer having a dendrimer structure comprising 50-85% (w/w) styrene as an additive of polymer blends comprising at least 50% (w/w) of PLA and a method of producing the polymer blend according to the invention.
Claims14
A polymer blend comprising:
- A) 0.5-10% (w/w), based on the total mass of the polymer blend, of at least one styrene butadiene copolymer comprising
- A1.) at least 50% (w/w), based on the total mass of the at least one styrene butadiene copolymer, of styrene moieties,
- A2.) at least 10% (w/w), based on the total mass of the at least one styrene butadiene copolymer, of butadiene moieties, and optionally
- A3.) one or more other comonomer moieties;
- B) 90-99.5% (w/w), based on the total mass of the polymer blend, of at least one poly(lactic acid) (PLA);
- and optionally
- C) 0 to 5% (w/w), based on the total mass of the polymer blend, of one or more additive(s).
A polymer blend comprising a styrene butadiene copolymer that is a block copolymer having a dendrimer structure, wherein said styrene butadiene copolymer comprises:
- A1) 50-85% (w/w) styrene moieties,
- A2) 15-50% (w/w) butadiene moieties, and
- A3) 0-25% (w/w) other comonomer moieties,
- wherein the polymer blend comprises at least 50% (w/w), based on the total mass of the polymer blends, of at least one PLA, and
- wherein said styrene butadiene copolymer is selected from the group consisting of a block copolymer having a first generation dendrimer structure.
Dependencies are inferred from the claim text.