Functional polymer comprising at least two different types of side chains, said polymer having the general formula (1),
- wherein
- A is an at least monosubstituted alkylene or arylene group,
- B is an amide, an ester or an ether group and n is either 0 or 1,
- F is selected from the group of an ester, a secondary amine, an amide, an ether, a thio ether, a thio ester, and may be the same or different for the different types of side chains,
- D is a side chain which is intended to reversible bind to a substrate or has a coating function, and D is selected from the group consisting of
- a short chain side chain D1 having a linear or branched, substituted or unsubstituted C1 to C12 alkyl group RD1 which optionally comprises heteroatoms and which carries at least one functional group K1;
- a side chain D2 having a long chain RD2 selected from the group consisting of polydimethylsiloxane, perfluoroethers, perfluoroalkyls, polyisobutene, polyethylene glycol, polydimethylacrylamide, polyvinylpyrrolidone, polyalkyloxazolines, dextran, carboxymethyl dextran, poly(N-isopropylacrylamide), poly(N-hydroxyethylacryl-amide, poly(2-hydroxyethyl methacrylate), poly-hydroxypropylmethacrylate), poly-(methacryloyloxylethyl phosphorylcholine), poly-(sulfobetaine methacrylate), polyalkylene residues having more than 20 carbon atoms, peptide chains, DNA fragments and poly-(sulfobetaine acrylamide), whereby D2 has no functional end group or side group;
- a side chain D3 having a long chain RD3 selected from the group consisting of a polydimethylsiloxane, perfluoroethers, perfluoroalkyls, polyisobutene, polyethylene glycol, polydimethylacrylamide, polyvinylpyrrolidone, polyalkyloxazolines, dextran, carboxymethyl dextran, poly(N-isopropylacrylamide), poly(N-hydroxyethylacryl-amide, poly(2-hydroxyethyl methacrylate), poly-hydroxypropylmethacrylate), poly-(methacryloyloxylethyl phosphorylcholine), poly-(sulfobetaine methacrylate), polyalkylene residues having more than 20 carbon atoms, peptide chains, DNA fragments and poly-(sulfobetaine acrylamide) whereby D3 carries at least one functional end or side group K3,
- E is a side chain which is intended to irreversible bind to a substrate, said side chain E
- having either a linear or branched, substituted or unsubstituted C1 to C20, which optionally comprises heteroatoms and carries at least one functional end group K4, or
- is the functional end group K4,
- and
- the polymer comprises 1 to 10 different types of side chains D and 1 to 10 different types of side chains E, but at least one type of side chain D and at least one type of side chain E, and
- said polymer comprising a plurality of each type of side chain,
- whereby the different types of side chains are randomly or regularly distributed in the polymer.