Patent ID: 8252846

Claim:
A biodegradable hydrophobic polyketal polymer comprising ketal groups, wherein each ketal group of the polymer has two oxygen atoms within the polymer backbone, wherein the polyketal polymer is selected from a group consisting of: a. a polyketal polymer comprising 1,4,-cyclohexanedimethoxy and 1,5-pentanedioxy, wherein the polyketal polymer comprising 1,4,-cyclohexanedimethoxy and 1,5-pentanedioxy is a poly(cyclohexane-1,4-diyl acetone dimethylene ketal-co-1,5-pentane-acetone dimethylene ketal); b. a polyketal polymer comprising 1,4,-cyclohexanedimethoxy and 1,4-butanedioxy, wherein the polyketal polymer comprising 1,4,-cyclohexanedimethoxy and 1,4-butanedioxy is a poly(cyclohexane-1,4-diyl acetone dimethylene ketal-co-1,4-butane-acetone dimethylene ketal); c. a polyketal polymer comprising 1,4,-cyclohexanedimethoxy and 1,6-hexanedioxy, wherein the polyketal polymer comprising 1,4,-cyclohexanedimethoxy and 1,6-hexanedioxy is a poly(cyclohexane-1,4-diyl acetone dimethylene ketal-co-1,6-hexane-acetone dimethylene ketal; and d. a polyketal polymer comprising 1,4,-cyclohexanedimethoxy and 1,8-octanedioxy, wherein the polyketal polymer comprising 1,4,-cyclohexanedimethoxy and 1,8-octanedioxy is a poly(cyclohexane-1,4-diyl acetone dimethylene ketal-co-1,8-octane-acetone dimethylene ketal).