Patent ID: 8623459

Claim:
A process for imparting decreased adhesion of biological material to the surface of a substrate to form a treated substrate which process comprises the following steps (i) oxidizing the surface of the substrate (ii) applying a composition comprising one or more ethylenically unsaturated compounds to the oxidized surface of the substrate and one or more photoinitiators and (iii) curing the composition in order to form a coating layer, wherein the decrease in adhesion of biological material to the surface of the substrate can be determined by comparing the amount of biological material adhered to the surface of the treated substrate and the biological material adhered to the surface of the untreated substrate wherein the one or more ethylenically unsaturated compounds are of formula wherein R 79 , R 80 and R 81 can be the same or different and are hydrogen or C 1-6 -alkyl, and Y is C(O)—OC 30-100 -alkyl, wherein C(O)—OC 30-100 -alkyl, is substituted with one or more OC(O)C(R 85 )C═C(R 86 )R 87 , wherein R 85 , R 86 , and R 87 can be the same or different and are hydrogen or C 1-6 -alkyl, and one or more CH 2 -groups of C(O)—OC 30-100 -alkyl, is replaced with —O—, wherein the one or more photoinitiators are of formula wherein L is hydrogen or R 27 , R 28 and R 29 are hydrogen or C 1-6 -alkyl, and X is G is —O—; R 35 is C 1-100 -alkyl, wherein C 1-100 -alkyl can be unsubstituted or substituted with one or more and one or more CH 2 -groups of C 1-100 -alkyl is replaced with —O— and the molar ratio of formula (1A) to (2) ranges from 10/1 to 1/10.