Patent attributes
The invention relates to a method for producing thermoplastic starch, in which a mixture comprising starch and a polyol, preferably selected from the group comprising polyethylene glycol, monosaccharides, sugar alcohols such as glycerol, sorbitol, erythritol, xylitol or mannitol and mixtures thereof, in a quantity of between 10 and 25 wt. % of the mixture, and an epoxide selected from the group comprising epoxidised plant oils such as soybean oil, linseed oil, sunflower oil, rapeseed oil and mixtures thereof, in a quantity of between 0.1 and 6, preferably between 2.5 and 3.5 wt. % of the mixture, is extruded, the mixture also containing an acid, preferably a carboxylic acid selected from the group consisting of citric acid, malic acid or tartaric acid, in a quantity of between 0 and 1, preferably between 0.1 and 0.5 wt. % of the mixture. The invention also relates to such a produced thermoplastic starch, to a compound produced by means of the thermoplastic starch, and to a film produced from such a compound.
