COMPOSITION CONTAINING ESTERIFIED CROSSLINKED DERIVATIVE OF CARBOXYLIC ALKYL ETHERIFIED STARCH AND ITS PRODUCTION

摘要

PROBLEM TO BE SOLVED: To obtain a starch obtained by further adding an additional value to former carboxymethylated starch. ;SOLUTION: This composition contains a starch derivative obtained by carboxyalkyl-etherifying of starch and wherein a part of the carboxylic alkyl ester group of the starch derivative forms a crosslinking by forming an ester bond with a hydroxyl group derived from raw material starch. This starch derivative is produced by mixing a carboxylic acid expressed by the formula: X-(CH2)n-COOH {X is a halogen atom and (n) is an integer of 1-20} or its salt with an alkali, adjusting the moisture content of the mixture to 5% and subjecting the resultant mixture to a heating reaction at ≥90°C.;COPYRIGHT: (C)2000,JPO