The invention provides modified starches having unique gelling properties which are prepared by chemically reacting an amylose containing starch base with an etherification or esterification reagent which will introduce a long linear hydrocarbon chain substituent therein. The aqueous gels formed by the starches are thermally and pH-reversible and the thermally-reversible gels are hot gels. The invention further provides an improved process for preparing starch halfacid esters in water by reacting starch under alkaline conditions with a hydrophobic-substituted cyclic dicarboxylic acid anhydride in the presence of a phase transfer agent.
申请公布号
DE3670846(D1)
申请公布日期
1990.06.07
申请号
DE19863670846
申请日期
1986.01.09
申请人
NATIONAL STARCH AND CHEMICAL CORP., BRIDGEWATER, N.J., US
发明人
TRZASKO, PETER T., PLAINSBORO NEW JERSEY 08536, US;TESSLER, MARTIN M., EDISON NEW JERSEY 08820, US;DIRSCHERL, TERESA A., NORTH PLAINFIELD NEW JERSEY 07060, US