| abstract |
Optical glass fiber having its glass surface adherently coated with an ultraviolet-cured coating of a liquid ultraviolet-curable coating composition is disclosed in which the composition comprises an ultraviolet-curable polymeric polyacrylate, a photoinitiator to render the composition curable with ultraviolet light, and from about 0.5% to about 5% of the coating composition of a polyalkoxy silane containing an organic substituent carrying a single mercaptyl hydrogen atom capable of reacting with acrylate unsaturation by Michael adduction. These compositions provide improved adhesion to the glass surface of the optical fiber which is well retained after exposure to high humidity atmospheres. |