the present invention describes a polyoxaester copolymer and blends thereof that may be used to produce hydrogels , surgical devices such as sutures , sutures with attached needles , molded devices , drug matrices , adhesives , sealants and the like . the invention also contemplates a process for producing these polyesters . the polyoxaester copolymers of the present invention are formed from a first divalent repeating unit of formula ia : -- r . sub . 30 -- c --] ia a second divalent repeating unit of the formula ib : -- c -- o -- r . sub . 3 -- o -- c -- c --] ib and a third repeating unit selected from the group of formulas consisting of : . sub . a , ii --]. sub . b , iii ]. sub . p -- o --). sub . l g xi and combinations thereof . these aliphatic polyoxaesters may be blended with other polymers that are preferably biocompatable .