Patent ID: 7105629

Claim:
A method of modifying a surface of a substrate, comprising: forming a film of a fluid prepolymer on a surface of a substrate, wherein the prepolymer comprises a polymer prepared from at least one lactone monomer selected from the group consisting of ε-caprolactone, trimethylene carbonate, glycolide, L-lactide, DL-lactide, DL-lactide, p-dioxanone, 5,5-dimethyl-1,3-dioxan-2-one, 1,4-dioxepan- 2-one said prepolymer being a liquid at 65° C. or at a lower temperature and comprising coumarin ester endgroups, wherein the inherent viscosity of the polymer is between about 0.05 dL/g and about 0.8 as determined in a 0.1 g/dL solution of hexafluoroisopropanol at 25° C.; and irradiating said film with ultraviolet light to form a crosslinked coating.