the present invention describes a polyoxaamide copolymer and blends thereof that may be used to produce hydrogels , surgical devices such as catheters , molded devices , and the like . the polyoxaamide copolymers of the present invention are composed of 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 . t ii --]. sub . b , iii ]. sub . p -- o --). sub . l g xi and combinations thereof , wherein r 30 is an alkylene , arylene , arylalkylene , substituted alkylene , substituted arylene and substituted alkylarylene provided that r 30 cannot be --] 1 -- 2 -- o -- r 3 -- o --] 1 -- 2 --; x , x &# 39 ; and y are selected from the group consisting of -- o -- and -- n --, provided both x and y are not both -- o -- and may be blended with a second polymer that is preferably biocompatable .