摘要:
The invention relates to a continuous extrusion process for preparing cold water swelling phosphate-cross-linked starch derivatives, wherein the process consists of the subsequent steps of gelatinising an alkaline starch in a first zone (10) in the extruder; adding of POCl3 as cross-linking reagent in a second zone (11) in the extruder; cross-linking the obtained gelatinised starch by means of the POCl3 in the second and third zone (11, 12) in the extruder, and neutralising the obtained cross-linked gelatinised starch that is present in a fourth zone (13) in the extruder; recovering the obtained cross-linked, gelatinised starch in a fifth zone (14) in the extruder.
摘要:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a thermoplastic organic composition having dramatically improved ductility, transparency, and water resistance, and a thermoplastic organic composition obtained by the manufacturing method. SOLUTION: The method for manufacturing the thermoplastic organic composition comprises a step of extruding starch in the presence of carbon dioxide gas or a compound that generates carbon dioxide gas when heated as well as water, under a condition wherein the carbon dioxide gas is in the supercritical or sub-supercritical state. The content of the carbon dioxide gas in the composition is 0.01-1 wt.% based on the water. COPYRIGHT: (C)2006,JPO&NCIPI