Ultraviolet radiation-curable coatings for optical fibers and optical fibers coated therewith
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United States of America Patent
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Sep 8, 1992
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app pub date -
Aug 8, 1991
filing date -
May 11, 1989
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Abstract
Ultraviolet radiation-curable primary and secondary coating compositions for optical fibers are disclosed. The primary coatings comprise a hydrocarbon polyol-based acrylated or methacrylated aliphatic urethane oligomer; an alkyl acrylate or methacrylate monomer; a refractive index modifying monomer or oligomer; a silane adhesion promoter; and a photoinitiator. The secondary coatings comprise a polyester-based aliphatic urethane acrylate or methacrylate oligomer; an acrylated or methacrylated compound; and a photoinitiator. Also disclosed are optical fibers coated with the secondary coating alone or with the primary and secondary coatings of the invention.
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