| abstract |
FIELD: chemistry. n SUBSTANCE: present invention relates to a composition for moulding articles and a method of producing said composition. The composition contains 100 pts.wt of a polymer component A, which consists of 5-100 wt % of a lactic acid polymer (component A-α) and 95-0 wt % of thermoplastic resin (component A-β), 0.001-5 of pts.wt of a phosphoric-fatty acid ester (component B), 0.01-5 pts.wt of metal phosphate salt (component C), 0.001-2 pts.wt of at least one antioxidant (component D), 0.001-10 pts.wt of a chain end closing agent (component E) and 0.01-0.3 pts.wt of hydrotalcite. The antioxidant is selected from a group comprising a phosphite-based compound, phosphonite-based compounds, a hindered phenol-based compound and a thioether-based compound. The method of producing the composition involves mixing, at 250-300°C, composition-1, which contains poly-1-lactic acid and a phosphoric-fatty acid ester, and composition-2, which contains poly-d-lactic acid and a phosphoric-fatty acid ester, in the presence of a metal phosphate salt to obtain a stereo-complex lactic acid polymer. Further, component A, which consists of the obtained stereo-complex polymer and a thermoplastic resin, is mixed with the antioxidant and the chain end closing agent. n EFFECT: obtained composition has good thermal stability, especially in humid conditions. n 14 cl, 22 tbl, 70 ex |