Radiation-curable composition for coating optical fibers and coatings produced from it

摘要

Described and claimed herein are radiation curable compositions for coating optical fibers, particularly primary coating compositions, which are specific liquid glass transition temperatures and / or, for example, 25 ° C. and 85 ° C. It has a viscosity ratio between ° C. Such compositions preferably have a skeleton that is not derived from polypropylene glycol, preferably a large amount of the reactive oligomer component, preferably a reactive oligomer containing the selected diisocyanate component, or one or more reactive dilutions. Includes monomers, photoinitiators, and, in some cases, one or more additives. Such compositions are also preferably sufficiently viscous at room temperature to ensure optimum fiber optic coating processability. Also described are methods of coating the radiation curable compositions described elsewhere and the resulting fiber optic coatings. [Selection diagram] Fig. 1