Using the polyurethane-acrylates as the polymeric protective coats in optical fibre technology

摘要

A method of preparation of urethane-acrylic oligomers was elaborated. They were applied as the main components of a composition, which harden within a short time under the influence of irradiation with UV light. The following substances were used to the synthesis: tolylene, isophorone and hexylene diisocyanates, oligo(oxypropylene)diol, triethylene and dipropylene glycols, hydroxyethyl and hydroxypropyl methacrylates as well as some alkylene acrylates and methacrylates as active diluents. The physicochemical and mechanical properties of the received compositions were determined before the hardening process and soon after it. It was found out that the polyurethane-acrylates are characterised by a considerable mechanical durability and a high adhesion against various materials, which makes them to be preferably used as the protective coats for the optical fibres.