Optical fiber element comprising a reticulated polyacrylic acid ester coating layer and the hydrogen absorbed by the moderate UV irradiation

摘要

The optical fibre element comprises at least one layer of coating constituted by a polyacrylate reticulated by UV radiation and at least one H2-absorbing buffer, said polyacrylate comprising at least one photo-initiator of UV reticulation possibly together with an activator for it wherein said photo-initiator and its activator, if any, are selected from the group which comprises those photo-initiators and those activators which cause a reduction in the hydrogen absorption capacity of less than 30% in a H2-absorbing buffer which has been in contact with said polyacrylate containing them for 30 days at 100 DEG C in an air atmosphere saturated with water vapour at 150 mbar.