abstract the invention describes a method of producing a molding compound on the basis of starch and a plasticizer starting product characterized in that the starch and the plasticizer starting product are simultaneously reacted with ethylene oxide in one and the same reaction vessel application_number US 65462191 A description surprisingly it is possible according to the invention provided that appropriate reaction conditions are maintained to chemically react mixtures of starch and citric acid with the respective epoxides in particular ethylene oxide simultaneously in a 34 single batch 34 reaction which is advantageous and involves little effort and thus to obtain basic compounds for producing films and molded parts in this way basic compounds can be produced which have good performance characteristics even at a low degree of oxethylation the low degree of oxethylation also enables particularly high weight percentages of starch and citric acid in the basic compounds to be achieved and thus products to be made from hardly modified natural substances since epoxides are more expensive raw material components than starch and citric acid the method according to the invention is much superior to the prior art also in this respect an additional great advantage is that the properties.