US 11,927,798 B2
Optical fiber
Noriaki Iwaguchi, Osaka (JP); Haruki Okuyama, Osaka (JP); Takahisa Yamaguchi, Osaka (JP); and Takashi Fujii, Osaka (JP)
Assigned to SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
Appl. No. 17/054,589
Filed by SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
PCT Filed May 16, 2019, PCT No. PCT/JP2019/019577
§ 371(c)(1), (2) Date Nov. 11, 2020,
PCT Pub. No. WO2019/221248, PCT Pub. Date Nov. 21, 2019.
Claims priority of application No. 2018-094592 (JP), filed on May 16, 2018.
Prior Publication US 2021/0181411 A1, Jun. 17, 2021
Int. Cl. G02B 6/02 (2006.01); C03C 25/105 (2018.01); C03C 25/1065 (2018.01); C03C 25/326 (2018.01); C03C 25/40 (2006.01); C03C 25/42 (2006.01); C03C 25/48 (2006.01); C08F 283/00 (2006.01)
CPC G02B 6/02395 (2013.01) [C03C 25/105 (2013.01); C03C 25/1065 (2013.01); C03C 25/326 (2013.01); C03C 25/40 (2013.01); C03C 25/42 (2013.01); C03C 25/48 (2013.01); C08F 283/008 (2013.01)] 7 Claims
OG exemplary drawing
 
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.