Radiation-curable compositions for coating optical fibers via alternating oligomers and coatings produced from them

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. Has a viscosity ratio between. Such compositions preferably contain a large amount of reactive oligomeric components, one or the other, which are substantially free of polypropylene glycol or which are substantially free of polypropylene glycol, including selected diisocyanate components. Includes multiple reactive diluent monomers, photoinitiators, and optionally one or more additives. Such compositions are also preferably sufficiently viscous at room temperature to ensure optimum fiber optic coating processability. Methods of using such radiation curable compositions for high speed and / or low helium fiber optic coating applications are also described and claimed along with the coated fiber optics produced from them. [Selection diagram] Fig. 1