Optical fiber coatings

Optical fiber coating compositions which compriseat least one ethylenically unsaturated polymerizable compound anda photoinitiator blend, wherein the blend comprises(a) bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide and (b) 2,4,6,-trimethylbenzoylethoxyphenylphosphine oxide in an (a):(b) weight:we...

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Bibliographic Details
Main Authors Sitzmann, Eugene V, Wolf, Jean-Pierre, Bramer, David, Losapio, Greg
Format Patent
LanguageEnglish
Published 30.01.2007
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Summary:Optical fiber coating compositions which compriseat least one ethylenically unsaturated polymerizable compound anda photoinitiator blend, wherein the blend comprises(a) bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide and (b) 2,4,6,-trimethylbenzoylethoxyphenylphosphine oxide in an (a):(b) weight:weight ratio of between about 1:10 and about 1:8; or (c) bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide, (d) 2,4,6,-trimethylbenzoylethoxyphenylphosphine oxide and (e) 2-hydroxy-2-methyl-1-phenyl-1-propanone in a (c):(d):(e) weight:weight:weight ratio between about 3:1:14 and about 4:1:16; or (f) bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide and (g) 2-hydroxy-2-methyl-1-phenyl-1-propanone in a (f):(g) weight:weight ratio of between about 1:3 and about 1:5 exhibit fast photospeed, very low color and fast photobleaching. The photoinitiator blends have low volatility, high shelf life stability and high compatibility with resins and monomers. The photoinitiator blends are for example liquid and easy to use.