Water-resistant starch materials for the production of cast sheets and thermoplastic materials

US5498706A · kind A · utility

Assignee

• EMS-Inventa AG · CH

Inventors

• Rainer Frische · Frankfurt, DE
• Renate Gross-Lannert · Dietzenbach, DE
• Klaus Wollmann
• Bernd Best · Mörfelden, DE
• Eduard Schmid · Bonaduz, CH
• Fritz Buehler · Thusis, CH

Key dates

• Filing date: Sep 9, 1994
• Grant date: Mar 12, 1996
• Expiry date: Sep 9, 2014

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29K2995/0059
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to water-resistant, thermoplastic starch materials processable into environmentally safe, thermoplastically produced products and cast sheets, which consist of starch acyl compounds, obtainable from high amylose starches and the derivatives thereof and being sparingly soluble in water, and of plasticizers which like ethyl citrate, glycerol acetate and lactic acid ester have a gelatinizing effect and preferably a dissolution property resulting in brilliant transparence and, as can be proved, are biodegradable.