Patent ID: 8367204

Claim:
An optical fiber coated with one or more coatings, wherein at least one of said coatings is obtained by curing a composition consisting essentially of: (a) one or more oligomers having a radiation curable group, said one or more oligomers including a (meth)acrylate oligomer having a backbone, said backbone including a polyether comprising structural unit represented by the following formula (1) —CH 2 CH(CH 3 )O (1) wherein the (meth)acrylate oligomer is present in the composition in an amount greater than 50 wt. %, relative to the total amount of the (meth)acrylate oligomers; (b) one or more antioxidants; (c) at least 0.05 wt. % relative to the total weight of the composition of one or more UV absorbers, wherein the ratio of modulus of elasticity for the cured composition after being exposed to light from a fluorescent lamp for 3 months at a temperature of 23° C. and humidity of 50% RH is greater than 0.50; (d) one or more polymerizable unsaturated monomers that are used as reactive diluents; (e) one or more photoinitiators selected from the group consisting of 1-hydroxycyclohexyl phenyl ketone; 2,2-dimethoxy-2-phenylacetophenone; xanthone; fluorenone; benzaldehyde; fluorene; anthraquinone; triphenylamine; carbazole; 3-methylacetophenone; 4-chlorobenzophenone; 4,4′-dimethoxybenzophenone; 4,4′-diaminobenzophenone; Michler's ketone; benzoin propyl ether; benzoin ethyl ether; benzyl methyl ketal; 1-(4-isopropylphenyl)-2-hydroxy-2-methylpropan-1-one; 2-hydroxy-2-methyl-1-phenylpropan-1-one; thioxanthone; diethylthioxanthone; 2-isopropylthioxanthone; 2-chlorothioxanthone; 2-methyl-1-[4-(methylthio)phenyl]-2-morpholino-propan-1-one; 2,4,6-trimethylbenzoyl diphenylphosphine oxide; bis-(2,6-dimethoxybenzoyl)-2,4,4-trimethylpentylphosphine oxide; 1-hydroxy-cyclohexyl-phenyl-ketone; 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)-butanone-1; 2,2-dimethoxy-1,2-diphenylethan-1-one; a 1:1 mixture by weight of 1-hydroxy-cyclohexyl-phenyl-ketone and benzophenone; 2-methyl-1-(4-methylthiophenyl)-2-morpholinopropan-1-one; a mixture of 25% bis(2,6-dimethoxybenzoyl)-2,4,4-trimethyl pentylphosphineoxide and 75% 2-hydroxy-2-methyl-1-phenyl-propan-1-one; bisacyl phosphine oxide; 2-hydroxy-2-methyl-1-(4-isopropylphenyl)-1-propanone; 2-hydroxy-2-methyl-1-phenyl-propan-1-one; Methanone, (diphenylphosphinyl)(2,4,6-trimethylphenyl)-; Benzoic acid, 4-benzoyl-, methyl ester; and a combination thereof; (f) one or more additives selected from the group consisting of coloring agents, light stabilizers, silane coupling agents, heat polymerization inhibitors, leveling agents, surfactants, preservatives, plasticizers, lubricants, solvents, fillers, aging preventives, wettability improvers, coating surface improvers; wherein all oligomers included in the composition comprise urethane linkages.