COATED OPTICAL FIBER AND ADIATION CURABLE RESIN COMPOSITION

摘要

The present invention relates to a coated optical fiber comprising a glass optical fiber with a single protective coating or a combination of an inner and an outer primary coating applied thereon and optionally with a colored coating subsequently applied thereon wherein the inner primary coating or at least a portion of the single coating is prepared from a radiation curable composition, which when applied as a capillary film having a thickness which is chosen as to fulfill the Lambert-Beer law, and cured with a 100W medium pressure mercury lamp, has a percentage reacted double bond unsaturation of at least about 54% after exposure to a dose of about 4.4 mJ/cm<2> or wherein the outer primary coating is prepared from a radiation curable composition, which when applied as a capillary film having a thickness which is chosen as to fulfill the Lambert-Beer law, and cured with a 100W medium pressure mercury lamp, has a percentage reacted double bond unsaturation of at least about 56% after exposure to a dose of about 4.4 mJ/cm<2>. The invention further relates to a radiation curable composition comprising a photoinitiator package of at least two free radical photoinitiators and having a relatively high cure speed.