US 12,215,248 B2
Resin composition, optical fiber, and method for producing optical fiber using polyol between 8000 and 20000 average molecular weight
Yuya Homma, Osaka (JP)
Assigned to SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
Appl. No. 18/010,042
Filed by SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
PCT Filed May 6, 2021, PCT No. PCT/JP2021/017380
§ 371(c)(1), (2) Date Dec. 13, 2022,
PCT Pub. No. WO2021/261088, PCT Pub. Date Dec. 30, 2021.
Claims priority of application No. 2020-108664 (JP), filed on Jun. 24, 2020.
Prior Publication US 2023/0193073 A1, Jun. 22, 2023
Int. Cl. C09D 175/08 (2006.01); C03C 25/1065 (2018.01); C03C 25/285 (2018.01); C03C 25/326 (2018.01); C03C 25/6226 (2018.01); C08F 283/00 (2006.01); G02B 6/02 (2006.01)
CPC C09D 175/08 (2013.01) [C03C 25/1065 (2013.01); C03C 25/285 (2013.01); C03C 25/326 (2013.01); C03C 25/6226 (2013.01); C08F 283/008 (2013.01); G02B 6/02395 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A resin composition for secondary coating of an optical fiber, the resin composition comprising:
a non-reactive urethane compound having a number average molecular weight of 10000 or more and 50000 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 5 parts by mass or less based on a total amount of the resin composition, and
the non-reactive urethane compound is a reaction product of a polyol having a number average molecular weight of 8000 or more and 20000 or less, a diisocyanate, and a compound having active hydrogen.