the present invention relates to a coating comprising at least one biodegradable polymer , wherein the polymer comprises at least one or a blend of a poly having a chemical formula described by structural formula , wherein ; r 1 is independently selected from the group consisting of alkylene , alkenylene , ——, ch r 11 — o — co — r 12 — coocr 11 — and combinations thereof ; r 3 and r 4 in a single co - monomer m or p , respectively , are independently selected from the group consisting of hydrogen , alkyl , alkenyl , alkynyl , aryl , alkyl , — sh , — 2 s , ch 2 oh , — chch 3 , — 4 nh 3 +, ˜ 3 nhcnh 2 , — ch 2 cooh , cooh , — ch 2 — co — nh 2 — ch 2 ch 2 — co — nh 2 , — ch 2 ch 2 cooh , ch 3 — ch 2 — ch —, formula , ho - p - ph - ch 2 —, 2 — ch —, ph - nh —, nh — 3 — c —, nh — ch ═ n — ch ═ c — ch 2 —. r 5 or r 6 are independently selected from bicyclic - fragments of 1 , 4 : 3 , 6 - dianhydrohexitols or from the group consisting of alkylene , alkenylene , alkyloxy , oligoethyleneglycol with a mw ranging from 44 da up to 700 da , — ch 2 — ch — 2 , ch 2 chch 2 whereby r 5 and r 6 are non identical . r 7 is hydrogen , aryl , alkyl or a protecting group such as benzyl - or a bioactive agent ; r 8 is independently alkyl or alkenyl ; r 9 or r 10 are independently selected from c 2 - c 12 alkylene or c 2 - c 12 alkenylene and r 11 or r 12 are independently selected from h , methyl , c 2 - c 12 alkylene or c 2 - c 12 alkenylene .