Patent ID: 7750060

Claim:
A radiation-curable composition comprising: a) 40 wt % -80 wt % of a polyester urethane (meth)acrylate oligomer, relative to the total weight of the composition, prepared from ortho-carboxylic polyester polyols having a molecular weight of 550 or more and less than 1000, wherein the polyester urethane (meth)acrylate oligomer comprises a polyester backbone and a reactive termini that provide the radiation curable property to the oligomer, and urethane linking groups; b) phenoxyethyl acrylate (PEA); c) 0 wt %-10 wt %, relative to the total weight of the composition, of one or more photoinitiators; wherein said composition has a glass transition temperature greater than 45° C., and wherein said composition, after cure, has a secant modulus greater than 600 MPa at a temperature of 23+/−2° C., and an elongation at break of at least 10° % at a temperature of 23+/−2° C., wherein said composition has a viscosity of 1200 mPa·s to 8000 mPa·s at 25° C.