Dsm N.v.

Dsm IP Assets B.v.

James J Schouten

Timothy Edward Bishop

Paul Eugene Snowwhite, Jr

John Edmund Southwell

Tyson Dean Norlin

Anthony F Toussaint

David M Szum

Chander P Chawla

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 cured as a capillary film with a 100W medium pressure mercury lamp has a percentage reacted acrylate unsaturation of at least about 54% after exposure to a dose of about 4.4 mJ/cmor wherein the outer primary coating is prepared from a radiation curable composition which when cured as a capillary film with a 100 W medium pressure mercury lamp has a percentage reacted acrylate unsaturation of at least about 56% after exposure to a dose of about 4.4 mJ/cm. The invention further relates to a radiation curable composition having a high cure speed.

Radiation curable resin composition

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 cured as a capillary film with a 100 W medium pressure mercury lamp has a percentage reacted acrylate unsaturation of at least about 54% after exposure to a dose of about 4.4 mJ/cm or wherein the outer primary coating is prepared from a radiation curable composition which when cured as a capillary film with a 100 W medium pressure mercury lamp has a percentage reacted acrylate unsaturation of at least about 56% after exposure to a dose of about 4.4 mJ/cm . The invention further relates to a radiation curable composition having a high cure speed.

Provided is an optical glass fiber assembly containing a matrix material and a plurality of coated optical glass fibers bound together by said matrix material, said matrix material having a swell index and/or glass transition temperature which provides the combination of properties of: (i) a swell index of a magnitude functionally capable of facilitating mid-span access to said optical glass fibers by a solvent stripping method of said matrix material from said optical glass fibers; and/or (ii) a glass transition temperature of a magnitude to facilitate end-access to said optical glass fibers by a heat stripping method of said matrix material from said optical glass fibers at an end terminus of said optical glass fiber assembly.

Optical glass fiber ribbon assembly and radiation curable matrix forming

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Elmhurst, IL, United States of America

James J Schouten