Substrates with biocidal coating

1. A process for coating a surface of a substrate, which process comprises the following steps

(i) oxidizing the surface of the substrate

(ii) applying a composition comprising one or more quaternary ammonium compounds carrying one or more ethylenically unsaturated groups onto the oxidized surface of the substrate and

(iii) curing the composition in order to form a coating layer,

wherein the one or more quaternary ammonium compounds carrying one or more ethylenically unsaturated groups are selected from

or any mixture thereof.

2. The process of claim 1 , wherein the composition also comprises one or more radical initiators.

3. The process of claim 1 , wherein the composition does not comprise one or more radical initiators.

4. The process of claim 1 , wherein the composition also comprises a solvent.

5. The process of claim 1 , wherein one or more biocides are applied to the surface of the substrate before step (i), after step (i) and before step (ii), after step (ii) and before step (iii), or after step (iii).

6. The process of claim 1 , wherein the substrate is pre-coated with one or more pre-coating layers before applying the composition comprising one or more quaternary ammonium compounds carrying one or more ethylenically unsaturated groups.

7. A process for imparting biocidal activity to the substrates according to claim 6 .

8. A process of for imparting biocidal activity to the surface of substrates according to claim 1 .

9. The process of claim 8 , wherein the substrate is a substrate used in the medicinal field.

10. The process according to claim 1 , wherein the composition comprising one or more quaternary ammonium compounds carrying one or more ethylenically unsaturation also comprises a macromonomer capable of forming a polymer having at least five macromonomer units, which macromonomer has a molecular weight ranging from 1,000 to 1,000,000,000 g/mol and carries at least two ethylenically unsaturated groups which are (meth)acryloyl moieties.

11. A process for coating a surface of a substrate, which process comprises the following steps

(i) oxidizing the surface of the substrate

(ii) applying a composition comprising one or more quaternary ammonium compounds carrying one or more ethylenically unsaturated groups onto the oxidized surface of the substrate and

(iii) curing the composition in order to form a coating layer,

wherein the one or more quaternary ammonium compounds carrying one or more ethylenically unsaturated groups are of formula

wherein

R 1 , R 2 and R 3 can be the same or different and are hydrogen or C 1-6 -alkyl,

R 4 , R 5 and R 6 can be the same or different and are C 1-30 -alkyl,

Q and Y can be the same or different and are C 1-6 -alkylene,

M is a bridging group selected from the group consisting of polymer and OC(O),

n and m can be the same or different and are 0 or 1,

J − is a halogenide,

wherein C 1-30 -alkyl or C 1-6 -alkylene can be unsubstituted or substituted with one or more OR 10 , wherein R 10 can be hydrogen or C 1-6 -alkyl,

and one or more CH 2 -groups of C 1-6 -alkylene can be replaced by N—CH 2 —CH═CH 2

wherein one of R 4 , R 5 or R 6 is selected from the group consisting of octyl, nonyl, decyl, undecyl, dodecyl, tetradecyl, pentadecyl, hexadecyl, octadecyl, eicosyl, heneicosyl, docosyl, tetracosyl and triacontyl,

wherein the composition comprising one or more quaternary ammonium compounds carrying one or more ethylenically unsaturation also comprises a macromonomer capable of forming a polymer having at least five macromonomer units, which macromonomer has a molecular weight ranging from 1,000 to 1,000,000,000 g/mol and carries at least two ethylenically unsaturated groups which are (meth)acryloyl moieties.