Primary coatings for optical glass fibers including poly(carbonate-urethane) acrylates

摘要

Photocurable liquid coating compositions adapted to provide primary coatings for optical glass fibers are disclosed. These compositions comprise polycarbonate-based acrylate-terminated polyurethane, an acrylate of an unsubstituted or C1-C10 alkyl substituted phenol that is alkoxylated with a C2-C4 alkylene oxide and at least one alkylacrylate having a Tg below about -45 DEG C. Films produced from these ultraviolet light curable compositions are flexible and possess good water resistance and good wet adhesion.