PRODUCTION OF STARCH-RELATED MATERIAL FOAM

PURPOSE:To obtain a starch foam excellent in biodegradability by heating a starchy material in the presence of an acid catalyst and a polyhydric alcohol, and foaming and hardening the obtained liquid material. CONSTITUTION:A starchy material is heated at 30-200 deg.C in the presence of an acid catal...

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Bibliographische Detailangaben
Hauptverfasser:	SHIRAKAWA KINICHI, SHIRAISHI NOBUO, YABU MASUO, ISSHIKI MASAYUKI, KURIMOTO YASUSHI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS WORKING-UP
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a starch foam excellent in biodegradability by heating a starchy material in the presence of an acid catalyst and a polyhydric alcohol, and foaming and hardening the obtained liquid material. CONSTITUTION:A starchy material is heated at 30-200 deg.C in the presence of an acid catalyst and a polyhydric alcohol (polyol) to liquefy the material. The obtained liquid material is then foamed and hardened to give an objective foam. As the starchy material serving as the starting raw material, a wide variety of common starches such as corn starch, potato starch, tapioca starch and wheat starch are used. Modified starches obtained therefrom are also used; an esterified or etherified starch preferably having a degree of substitution of 0.01 to 0.5 is used while other cross-linked starches can also be used. This foam has wide application; for example, it can realize even the foaming while bonding to wood or paper to thereby give a product generally having high peel strength.