Patent ID: 7455907

Claim:
A medical article, comprising an implantable substrate having a coating deposited on the substrate, the coating comprising a polymer, the polymer being a product of co-polycondensation of a diketene acetal and a diol, wherein the diol comprises, cycloaliphatic, aromatic, or organosilicon diols or blends or combinations thereof where the diketene acetal has a structure of formula (I) or the diol comprises cycloaliphatic, aromatic, or organosilicon diols or blends or combinations thereof where the diketene acetal has a structure of formula (II), wherein the diketene acetal is selected from a group of compounds having formulae (I) or (II): wherein: R, R 1 , and R 3 are, independently, unsusbstituted or substituted straight-chained, branched, or cyclic alkyl radicals C 1 -C 8 , or unsusbstituted or substituted aryl radicals; R 2 is a straight chain or branched C 1 to C 16 alkyl group or a straight chain or branched C 1 to C 16 alkyl group containing an ether group; R and R 1 are selected such that the diketene acetal is one of 3,9-dipentylidene-2,4,8,10-tetraoxaspiro-[5,5]-heptadecane, 3,9-dibutylidene-2,4,8,10-tetraoxaspiro-[5,5]-pentadecane, 3,9-dipropylidene-2,4,8,10-tetraoxaspiro-[5,5]-tridecane, and mixtures thereof; wherein the cycloaliphatic diols are selected from a group consisting of 1,2-cyclobutanediol, 1,3-cyclobutanediol, 1,2-cyclopentanediol, 1,3-cyclopentanediol, 1,2-cyclohexanediol, 1,3-cyclohexanediol, 1,2-cycloheptanediol, 1,3-cycloheptanediol, 1,4-cycloheptanediol, caprolactone diol, and mixtures thereof; and wherein the aromatic diols are selected from a group consisting of o-benzenedimethanol, m-benzenedimethanol, and mixtures thereof.