Verfahren zur Herstellung eines hydrophoben Staerkederivats, hydrophobes Staerkederivat und Verwendung des Verfahrens

(A1) Die vorliegende Erfindung beschreibt ein Verfahren zur Herstellung eines hydrophoben Staerkederivats durch Veresterung alkoholischer Funktionen mit organischen Saeureanhydriden in waessrigen Salzloesungen. Die erhaltenen hydrophoben Staerkederivate verbessern z. B. die Wasserstabilitaet von Papieren.

DE 102007005927 A1 UPAB: 20081024 NOVELTY - Hydrophobic starch derivative production involves dispersing starch or starch derivatives in an aqueous inorganic salts solution at 0-60 degrees C for 2-96 hours in which the concentration of salt is in between 0.2-7 m. The starch or starch derivative is originated from potatoes, rice, corn, peas or grain. An untreated, part-substituted, part-reduced or part-oxidized starch or starch derivatives or mixtures are used. A pH of the reaction is set in between 4-8.5. The reaction is stopped by adding an alcohol-water mixture, in which alcohol is immiscible with water. USE - Method for producing hydrophobic starch derivatives and manufacture of paper products (Claimed). ADVANTAGE - The hydrophobic starch derivative production method ensures less possible use of reagent, highest degree of substitution is achieved and therefore the most economical procedure is ensured, so the method is simple and applicable on a multiplicity of strengths.