Cyclodextrin polymers and/or cyclodextrin derivatives with complexing properties and ion-exchange properties and method for the production thereof

A process for producing water-soluble and water-insoluble copolymers of cyclodextrin(s) or cyclodextrin derivative(s), wherein the repeating unit of the structure has the following general formula:

• in which y is the number of repetitions of the unit;
• and in which [CD] is selected from the group consisting of:
• cyclodextrin(s), cyclodextrin derivative(s), inclusion complex(es) of cyclodextrin(s), inclusion complex(es) of cyclodextrin derivative(s);
• and
• represents the molecular chain of a poly(carboxylic) acid in which at least two carboxylic acid functions have been esterified, and which supports at least one non esterified carboxylic acid function, wherein [AC] represents the carbon backbone of said poly(carboxylic) acid;
• the process comprising the following operations:
• preparing a solid state mixture comprising at least one element selected from the group consisting of:
• cyclodextrin(s), cyclodextrin derivative(s), inclusion complex(es) of cyclodextrin(s), inclusion complex(es) of cyclodextrin derivative(s);
• and at least one element selected from the group consisting of:
• poly(carboxylic acid), poly(carboxylic acid) anhydride, mixture of poly(carboxylic acid) and poly(carboxylic acid) anhydride;
• and optionally, a catalyst;
• and
• heating the mixture to a temperature in the range of 100° C. to 200° C. for a period in the range of 1 min to 60 min.