Patent ID: 7915319

Claim:
A visible light curable composition comprising: A urethane component, comprising one or more of A station wherein the radiation curable composition is dispensed onto at least one substrate, and A station wherein the at least substrate to which has been applied the radiation curable composition is exposed solely to radiation in the visible range of the electromagnetic spectrum generated from the solely visible radiation-generating source, wherein health risks selected from the group consisting of erythema, photokeratitis, and combinations thereof of an individual using the system and being exposed to an environment in which radiation curable compositions are being cured by exposure to radiation in the electromagnetic spectrum are reduced, wherein the radiation curable composition comprises A urethane component, comprising one or more of An aliphatic urethane triacrylate comprising the combination of greater than 50% of a urethane acrylate and less than 50% of tripropylene glycol diacrylate, An aliphatic polyether urethane oligomer comprising a multifunctional terminally unsaturated urethane prepared from one or more hydroxyl-functional vinyl ethers selected from the group consisting of ethylene glycol monovinyl An aliphatic urethane triacrylate comprising the combination of greater than 50% of a urethane acrylate and less than 50% of tripropylene glycol diacrylate, An aliphatic polyether urethane oligomer comprising a multifunctional terminally unsaturated urethane oligomer comprising the reaction product of (a) a terminally unsaturated isocyanate containing polyurethane oligomer with (b) an alkoxylated polyhydric alcohol, A trifunctional aliphatic urethane acrylate oligomer, A reactive diluent comprising the combination of two or more of hexane diol di(meth)acrylate present in an amount of about 5 to about 15 weight percent, dimethyl acrylamide present in an amount of about 20 to about 25 weight percent, ethoxyethoxyethyl acrylate and tetrahydrafurfuryl acrylate, A photoinitiator triggered upon exposure to radiation in the visible range of the electromagnetic spectrum, and A photoinitiator synergist, wherein the multifunctional terminally unsaturated urethane oligomer is prepared from one or more hydroxyl-functional vinyl ethers selected from the group consisting of ethylene glycol monovinyl ether and cyclohexane dimethanol monovinyl ether.