G - Physics – 02 – B
Patent
G - Physics
02
B
402/125, 204/91.
G02B 6/02 (2006.01) C03C 17/32 (2006.01) C03C 25/10 (2006.01) C08F 299/06 (2006.01) C08G 18/32 (2006.01) C08G 18/67 (2006.01) C08G 18/81 (2006.01) C08L 75/06 (2006.01)
Patent
CA 1236625
ULTRAVIOLET CURABLE OUTER COATINGS FOR OPTICAL FIBER ABSTRACT Buffer-coated and overcoated optical glass fiber is disclosed in which the topcoat has the high strength and high tensile modulus combined with good elongation and solvent resistance associated with extruded jacket coatings, but which is applied by ordinary coating procedures and cured by exposure to ultraviolet radiation. The coating compositions which enable this to be achieved comprise 30% to about 80% of linear diethylenic polyester polyurethanes which are the linear polyurethane reaction product of an organic diisocyanate with hydroxy-functional polyester formed by reacting a diol, such as ethylene glycol, with with certain dicarboxylic acids, such as adipic acid. This polyurethane is end capped with a monoethylenically unsaturated monohydric alcohol. At least 50% of this diethylenic polyester polyurethane is combined with at least 5% of liquid diethylenic diester of a diglycidyl ether of a bisphenol, and at least 5% of liquid monoethlylenically unsaturated monomer having a glass -transition temperature above about 55°C., these proportions being based on total reactive components.
466277
Bishop Timothy E.
Pasternack George
Desoto Inc.
Dsm Ip Assets B.v.
Fetherstonhaugh & Co.
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