Fluorine-containing polyesters, and their production and use

摘要

A fluorine-containing polyester which comprises essentially as the constituting units (a) a group of the formula: <IMAGE> wherein Rf is a perfluoroalkyl group having 8 to 21 carbon atoms and n is an integer of 0 or 1 and (b) a group of the formula: <IMAGE> wherein R is one of the groups represented by the formulas: <IMAGE> wherein R1 to R6 is each a hydrogen atom or a lower alkyl group, R1 and R3 being optionally combined together at the terminal carbon atoms to form a cyclic ring, X is a halogen atom or a lower alkyl group and m is an integer of 0 to 4, and is useful as a water and oil-repelling agent or a non-sticking agent.