Resin composition, optical fiber, and method for producing optical fiber
A resin composition for secondary coating of an optical fiber comprises at least one polyoxyalkylene monoalkyl ether compound selected from the group consisting of a polyoxyalkylene monoalkyl ether having a number average molecular weight of 2500 or more and 10000 or less and a derivative of the polyoxyalkylene monoalkyl ether, a photopolymerizable compound, and a photopolymerization initiator.
1. A resin composition for secondary coating of an optical fiber, comprising:
at least one polyoxyalkylene monoalkyl ether compound selected from the group consisting of a polyoxyalkylene monoalkyl ether having a number average molecular weight of 2500 or more and 10000 or less and a derivative of the polyoxyalkylene monoalkyl ether;
a photopolymerizable compound; and
a photopolymerization initiator.
2. The resin composition according to claim 1 , wherein a content of the polyoxyalkylene monoalkyl ether compound is 0.05 parts by mass or more and 15 parts by mass or less based on a total amount of the resin composition of 100 parts by mass.
3. The resin composition according to claim 1 , wherein the polyoxyalkylene monoalkyl ether comprises at least one selected from the group consisting of polyoxypropylene butyl ether and polyoxyethylene polyoxypropylene butyl ether.
4. The resin composition according to claim 1 , wherein the derivative of the polyoxyalkylene monoalkyl ether comprises a urethane (meth)acrylate having a structure based on the polyoxyalkylene monoalkyl ether.
5. The resin composition according to claim 4 , wherein the urethane (meth)acrylate is a reaction product of the polyoxyalkylene monoalkyl ether, a diisocyanate, and a hydroxyl group-containing (meth)acrylate.
6. The resin composition according to claim 4 , wherein the urethane (meth)acrylate is a reaction product of the polyoxyalkylene monoalkyl ether and an isocyanate group-containing (meth)acrylate.
7. An optical fiber, comprising:
a glass fiber comprising a core and a cladding;
a primary resin layer coating the glass fiber in contact with the glass fiber; and
a secondary resin layer coating the primary resin layer,
wherein the secondary resin layer comprises a cured material of the resin composition according to claim 1 .
8. A method for producing an optical fiber, comprising:
an application step of applying the resin composition according to claim 1 to a periphery of a glass fiber comprising a core and a cladding; and
a curing step of curing the resin composition by irradiation with ultraviolet rays after the application step.