Patent ID: 11927798
Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
Field: Materials, metallurgy (Chemistry)
Classification: CPC G  C | IPC C  G

Claim 0:
1. An optical fiber comprising a glass fiber comprising a core and a cladding, a primary resin layer in contact with the glass fiber and covering the glass fiber, and a secondary resin layer covering the primary resin layer,
wherein the primary resin layer comprises a cured product of a resin composition containing a urethane (meth)acrylate oligomer, a monomer, a photopolymerization initiator and an aromatic acid compound,
a content of the aromatic acid compound is 20 ppm or more and 12000 ppm or less based on a total amount of the resin composition,
a Young's modulus of the primary resin layer is 0.6 MPa or less at 23° C.±2° C.,
the resin composition contains the aromatic acid compound comprising two or more aromatic acid compounds, and
the aromatic acid compound comprises diphenyl phosphinic acid and trimethylbenzoic acid.