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

US5367067A · 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: Mar 1, 1993
• Grant date: Nov 22, 1994
• Expiry date: Mar 1, 2013

Classification

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

Abstract

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