Application US20190194451

COMPOSITION BASED ON POLYACTIC ACID
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US20190194451

1. A composition based on polylactic acid, comprising polylactic acid or a compound derived therefrom, and one or more additives, characterized in that polymethylmethacrylate is used as at least one additive. (5) (0)

2. The composition of claim 1, characterized in that the amount of polymethylmethacrylate is at least 5 wt %, based on the total amount of polylactic acid or a compound derived therefrom, based on weight, in the final composition. (0)

3. The composition of claim 1, characterized in that the amount of polymethylmethacrylate is at least 10 wt %, based on the total amount of polylactic acid or a compound derived therefrom, based on weight, in the final composition. (0)

4. The composition of claim 1, characterized in that the amount of polymethylmethacrylate is at most 50 wt %, based on the total amount of polylactic acid or a compound derived therefrom, based on weight, in the final composition. (0)

5. The composition of claim 1, characterized in that a polylactic acid with a composition between 95/5 and 100/0 (L-lactide/D-lactide) is used as polylactic acid or a compound derived therefrom. (0)

6. The composition of claim 1, characterized in that the aforementioned composition further contains hydrotalcite. (1) (0)

8. A method for manufacturing a foamed moulded part, comprising extrusion of polylactic acid or a compound derived therefrom in the presence of one or more additives, impregnation with an impregnating agent, pre-foaming and moulding, characterized in that the aforementioned extrusion is carried out in the presence of polymethylmethacrylate. (7) (0)

9. The method of claim 8, characterized in that in the aforementioned extrusion the amount of polymethylmethacrylate added is at least 5 wt %, based on the total amount of polylactic acid or a compound derived therefrom, based on weight, present during the aforementioned extrusion. (0)

10. The method of claim 8, characterized in that after pre-foaming, the resultant pre-foamed beads are provided with a coating. (1) (0)

12. The method of claim 8, characterized in that polylactic acid or a compound derived therefrom is mixed with one or more materials selected from the group comprising PHA (PolyHydroxyAlkanoate), PEF (PolyEthyleneFuranoate), PCL (Polycaprolactone), PHB (Polyhydroxybutyrate), PBAT (PolyButyleneAdipateTerephthalate), PBS (Polybutylene succinate), PTT (PolyTrimethyleneTerephthalate), BioPET (BioPolyEthyleneTerephthalate), BioPE (BioPolyEthylene) and BioPA (BioPolyAmide). (0)

13. The method of claim 8, characterized in that the aforementioned extrusion is carried out in the presence of hydrotalcite, wherein the amount of hydrotalcite is at least 0.2 wt % and at most 2.0 wt %, based on the weight of the final composition. (0)

14. The method of claim 8, characterized in that the aforementioned moulding step is carried out in the presence of hot air, steam, or a combination thereof. (0)

15. The method of claim 8, characterized in that the aforementioned impregnating step is carried out with an impregnating agent selected from the group comprising CO₂, MTBE, nitrogen, air, (iso)pentane, propane and butane, or a combination thereof. (0)

16. A foamed moulded part, obtained by carrying out the method as defined in claim 8, characterized in that T_maxof the aforementioned moulded part is at least 85° C. (2) (0)

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Application US20190194451

COMPOSITION BASED ON POLYACTIC ACID

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