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AssigneeNederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
InventorsSabine Fischer, Eric G. M. Craenmehr, Jan J. De Vlieger, Theodoor M. Slaghek
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Starch can be gelatinised more efficiently by a thermomechanical treatment, if a dialdehyde polysaccharide with a relatively low degree of oxidation is added to the starch. This thermomechanical treatment can be carried out at a temperature below 115 DEG C., or even below 100 DEG C., and with a high throughput rate. With this treatment a granulate or other semi-finished product is obtained that can be shaped to produce an article that has excellent dimensional stability in water. By adding dialdehyde polysaccharide with a low degree of oxidation to starch it is possible to blow transparent films based on thermoplastic starch which have improved mechanical properties.
A process of gelatinising starch by thermomechanical treatment of starch, wherein a dialdehyde polysaccharide with a degree of oxidation of 2-65% is added to the starch and the thermomechanical treatment is carried out continuously.
A granulate of thermoplastic starch that, based on the starch, contains 2-50% (m/m) of a dialdehyde polysaccharide or coupling product thereof, with a degree of oxidation of 3-65%, and 10-75% (m/m), based on the total of starch and dialdehyde polysaccharide, of a polyol or urea as plasticiser, and water.
A shaped starch product that, based on the starch, contains 2-50% (m/m) of a dialdehyde polysaccharide or coupling product thereof, with a degree of oxidation of 3-65% and 10-75% (m/m), based on the total of starch and dialdehyde polysaccharide, of a polyol or urea as plasticiser, and water.
A blown starch film that, based on the starch, contains 2-50% (m/m) of a dialdehyde polysaccharide or coupling product thereof, with a degree of oxidation of 2-65%, and 10-75% (m/m), based on the total of starch and dialdehyde polysaccharide, of a polyol or urea as plasticiser, and water.
Dependencies are inferred from the claim text.