| 摘要 |
The present invention relates to thermoplastic and biodegradable polysaccharide esters/polysaccharide ether esters, which are characterised in that they can be represented by the general structure <IMAGE> wherein Polysaccharide-O represents the substituted OH groups of a polymeric saccharide unit and wherein A is a linear polyether chain of the following structureA=(E-O)nwherein E signifies a linear aliphatic or aromatic branched or unbranched chain having 2 to 11 C atoms, n is an integer equal to or greater than 0 and both B and D are a maleic acid addition product of the following structure <IMAGE> wherein F is an aliphatic, saturated, monounsaturated or polyunsaturated carbon skeleton, which may optionally be provided with further substituents and wherein C can be a hydrogen atom, one or more substituents from the group dihydroxyethyl, hydroxypropyl, hydroxybutyl, methyl, ethyl, benzyl, dihydroxypropyl, carboxyalkyl, sulphoalkyl or cyanoethyl.
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