| 摘要 |
The invention relates to polysaccharide derivatives consisting of a biopolysaccharide skeleton and organic groups with a molecular weight <5 000 that are connected to said skeleton via ether bridges. The organic groups have the general formula (Ia) or (Ib). Preferably, alpha- or beta-(1,4)- and/or alpha or beta-(1,3)-glucan units are used as the biopolysaccharide component, such as e.g. xy-loglucans, glucomannans such as guar gum or locust bean gum, xanthan gum, carrageenans, alginates and pectins. The invention also relates to a method for producing said polysaccharide derivatives, according to which the biopolysaccharide component is reacted with an N-alkyl maleamic acid or a salt thereof in the presence of a base catalyst, whereby the maleamide component can also be cyclised prior to or following the reaction with the biopolysaccharide component. A wide variety of polysaccharide derivatives can thus be obtained, said derivatives being especially suitable for bonding to cellulose fibres, a fact that is of particular interest for the treatment of textiles and that makes the inventive polysaccharide derivatives particularly suitable as bio-degradable fabric softeners.
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