| abstract |
The present invention relates to oligomers or prepolymers which are formed by reacting an isocyanate, a lactone adduct and a hydroxyalkyl acrylate or methacrylate. These oligomers can be used to make UV curable coatings by adding acrylate monomers, photoinitiators and wetting agents. Transparent, abrasion resistant surfaces result from the cure by ultraviolet light of these coatings on substrates such as PVC based substrates. By adjusting the ratio of hydroxyalkyl acrylate or methacrylate and the lactone adduct component in the oligomer, coatings with both high tensile strength and elongation can be obtained. |