Reaction injection moulding compound comprising - one or more linear biopolyesters selected from the group ∘ L-polylactate or L-polylactide having a melting temperature of > 160 °C, ∘ poly(3-hydroxybutyrate), polyhydroxyalkanoate, copolymers of various hydroxycarboxylic acids, in particular poly(hydroxyvalerate-co-butyrate), with melting points above 160 °C, ∘ poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV); - one or more linear biopolyesters selected from the group of DL-polylactates (DL-PLA) which, when mixed with the one or more biopolyester(s), result in a lowering of the melting point or have a low-melting eutectic; - one or more linear biopolyesters selected from the group ∘ a copolyester of at least two biologically producible hydroxycarboxylic acids, namely poly-(hydroxy-butyrate-valerate) with different hydroxycarboxylic acid ratios and different molar masses in the range from M n = 8,000 to 10,000,000 Dalton, ∘ poly(butylene succinate-co-L-lactate) (PBSL); polycaprolactone, poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx); - one or more oligomeric biopolyesters based on adipic acid, sebacic acid or succinic acid; - one or more trifunctional biopolyesters selected from the group ∘ esters of citric acid, ∘ trifunctional esters derived from hexanetriol or trimethylolpropane; ∘ acetyltributyl citrate, ∘ tributyl citrate, ∘ Tris-(2-hydroxypropyl) citrate, ∘ tripropyl citrate, ∘ Tris-(2,3-epoxypropyl) citrate, ∘ acetyl-tris-(2-hydroxypropyl) citrate, ∘ acetyl-tris-(2,3-epoxypropyl) citrate; - one or more blocked di- and/or polyisocyanates; - one or more inorganic and/or organic additives (G1, G2). - one or more linear biopolyesters selected from the group ∘ L-polylactate or L-polylactide having a melting temperature of > 160 °C, ∘ poly(3-hydroxybutyrate), polyhydroxyalkanoate, copolymers of various hydroxycarboxylic acids, in particular poly(hydroxyvalerate-co-butyrate), with melting points above 160 °C, ∘ poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV); ∘ L-polylactate or L-polylactide having a melting temperature of > 160 °C, ∘ poly(3-hydroxybutyrate), polyhydroxyalkanoate, copolymers of various hydroxycarboxylic acids, in particular poly(hydroxyvalerate-co-butyrate), with melting points above 160 °C, ∘ poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV); - one or more linear biopolyesters selected from the group of DL-polylactates (DL-PLA) which, when mixed with the one or more biopolyester(s), result in a lowering of the melting point or have a low-melting eutectic; - one or more linear biopolyesters selected from the group ∘ a copolyester of at least two biologically producible hydroxycarboxylic acids, namely poly-(hydroxy-butyrate-valerate) with different hydroxycarboxylic acid ratios and different molar masses in the range from M n = 8,000 to 10,000,000 Dalton, ∘ poly(butylene succinate-co-L-lactate) (PBSL); polycaprolactone, poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx); ∘ a copolyester of at least two biologically producible hydroxycarboxylic acids, namely poly-(hydroxy-butyrate-valerate) with different hydroxycarboxylic acid ratios and different molar masses in the range from M n = 8,000 to 10,000,000 Dalton, ∘ poly(butylene succinate-co-L-lactate) (PBSL); polycaprolactone, poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx); - one or more oligomeric biopolyesters based on adipic acid, sebacic acid or succinic acid; - one or more trifunctional biopolyesters selected from the group ∘ esters of citric acid, ∘ trifunctional esters derived from hexanetriol or trimethylolpropane; ∘ acetyltributyl citrate, ∘ tributyl citrate, ∘ Tris-(2-hydroxypropyl) citrate, ∘ tripropyl citrate, ∘ Tris-(2,3-epoxypropyl) citrate, ∘ acetyl-tris-(2-hydroxypropyl) citrate, ∘ acetyl-tris-(2,3-epoxypropyl) citrate; ∘ esters of citric acid, ∘ trifunctional esters derived from hexanetriol or trimethylolpropane; ∘ acetyltributyl citrate, ∘ tributyl citrate, ∘ Tris-(2-hydroxypropyl) citrate, ∘ tripropyl citrate, ∘ Tris-(2,3-epoxypropyl) citrate, ∘ acetyl-tris-(2-hydroxypropyl) citrate, ∘ acetyl-tris-(2,3-epoxypropyl) citrate; - one or more blocked di- and/or polyisocyanates; - one or more inorganic and/or organic additives (G1, G2).