Patent ID: 6660804
Filing Date: 2003-12-09
Classification: C08B,C08G

Abstract:
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 100Â° C. to 200Â° C. for a period in the range of 1 min to 60 min.