Compositions comprising 65% to 99.4% by weight of biopolymers selected from the group consisting of polylactic acid, polybutylene succinate, polybutylene succinate adipate (PBSA), thermoplastic starch, polyhydroxyalkanoate, polybutylene adipate terephthalate (PBAT), polybutylene sebacate terephthalate (PBST), polyhydroxybutyrate, polycaprolactone, cellophane, and mixtures thereof, 0.5% to 30% by weight of homopolymers, copolymers or terpolymers based on vinyl acetate, and 0.1% to 5% by weight of organopolysiloxane pellets comprising 100 parts by weight of at least one polyorganosiloxane composed of units of general formula R r SiO (4-r/2) where R is identical or different and is a substituted or unsubstituted hydrocarbon radical and r is 0, 1, 2 or 3, with the proviso that the average numerical value of r is within a range from 1.9 to 2.1, 1 to 200 parts by weight of a reinforcing or non-reinforcing filler or mixtures thereof, 0.01 to 20 parts by weight of a boric acid-containing additive for the production of the pellet material, and optionally further auxiliaries selected from the group of processing aids, plasticizers, pigments, and stabilizers, the organopolysiloxane pellets having a particle size of 1 to 100 mm, with the proviso that the contents of components,, and in % by weight are in each case based on the total weight of the compositions. 65% to 99.4% by weight of biopolymers selected from the group consisting of polylactic acid, polybutylene succinate, polybutylene succinate adipate (PBSA), thermoplastic starch, polyhydroxyalkanoate, polybutylene adipate terephthalate (PBAT), polybutylene sebacate terephthalate (PBST), polyhydroxybutyrate, polycaprolactone, cellophane, and mixtures thereof, polylactic acid, polybutylene succinate, polybutylene succinate adipate (PBSA), thermoplastic starch, polyhydroxyalkanoate, polybutylene adipate terephthalate (PBAT), polybutylene sebacate terephthalate (PBST), polyhydroxybutyrate, polycaprolactone, cellophane, and mixtures thereof, 0.5% to 30% by weight of homopolymers, copolymers or terpolymers based on vinyl acetate, and 0.1% to 5% by weight of organopolysiloxane pellets comprising 100 parts by weight of at least one polyorganosiloxane composed of units of general formula R r SiO (4-r/2) where R is identical or different and is a substituted or unsubstituted hydrocarbon radical and r is 0, 1, 2 or 3, with the proviso that the average numerical value of r is within a range from 1.9 to 2.1, 1 to 200 parts by weight of a reinforcing or non-reinforcing filler or mixtures thereof, 0.01 to 20 parts by weight of a boric acid-containing additive for the production of the pellet material, and optionally further auxiliaries selected from the group of processing aids, plasticizers, pigments, and stabilizers, the organopolysiloxane pellets having a particle size of 1 to 100 mm, 100 parts by weight of at least one polyorganosiloxane composed of units of general formula R r SiO (4-r/2) where R is identical or different and is a substituted or unsubstituted hydrocarbon radical and r is 0, 1, 2 or 3, with the proviso that the average numerical value of r is within a range from 1.9 to 2.1, 1 to 200 parts by weight of a reinforcing or non-reinforcing filler or mixtures thereof, 0.01 to 20 parts by weight of a boric acid-containing additive for the production of the pellet material, and optionally further auxiliaries selected from the group of processing aids, plasticizers, pigments, and stabilizers,