US 12,265,250 B2
Resin composition, optical fiber, and method for producing optical fiber
Yuya Homma, Osaka (JP)
Assigned to SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
Appl. No. 17/790,181
Filed by SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
PCT Filed Dec. 8, 2020, PCT No. PCT/JP2020/045654
§ 371(c)(1), (2) Date Jun. 30, 2022,
PCT Pub. No. WO2021/145101, PCT Pub. Date Jul. 22, 2021.
Claims priority of application No. 2020-003516 (JP), filed on Jan. 14, 2020.
Prior Publication US 2023/0071877 A1, Mar. 9, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C03C 25/105 (2018.01); C03C 25/1065 (2018.01); C03C 25/285 (2018.01); C03C 25/36 (2006.01); C03C 25/6226 (2018.01); C08F 290/06 (2006.01); G02B 6/02 (2006.01); G02B 6/44 (2006.01)
CPC G02B 6/02395 (2013.01) [C03C 25/105 (2013.01); C03C 25/1065 (2013.01); C03C 25/285 (2013.01); C03C 25/36 (2013.01); C03C 25/6226 (2013.01); C08F 290/06 (2013.01); G02B 6/44 (2013.01); C03C 2217/78 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A resin composition for secondary coating of an optical fiber, comprising:
a non-reactive urethane compound having a number average molecular weight of 10000 or more and 40000 or less;
a photopolymerizable compound; and
a photopolymerization initiator,
wherein a content of the non-reactive urethane compound is 0.05 parts by mass or more and 10 parts by mass or less based on a total amount of the resin composition of 100 parts by mass, and the non-reactive urethane compound is a reaction product of a polyol having a number average molecular weight of 1800 or more and 4500 or less, a diisocyanate, and a compound having active hydrogen.