the present invention refers to a polymeric composition prepared from a biodegradable polymer defined by poly - hydroxybutyrate or copolymers thereof , and at least one other biodegradable polymer , such as polycaprolactone and poly , so as to alter its structure , and further at least one additive of the type of natural filler and natural fibers , and , optionally , nucleant , thermal stabilizer , processing aid , with the object of preparing an environmentally degradable material . according to the production process described herein , the composition resulting from the mixture of the modified biodegradable polymer and additives can be utilized in the manufacture of injected packages for food products , injected packages for cosmetics , tubes , technical pieces and several injected products .