US 12,153,192 B2
Optical-waveguide-clad composition, optical-waveguide-clad dry film, and optical waveguide
Junko Kurizoe, Osaka (JP); Toru Nakashiba, Osaka (JP); Shingo Maeda, Saga (JP); and Naoyuki Kondo, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/430,523
Filed by PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
PCT Filed Feb. 19, 2020, PCT No. PCT/JP2020/006413
§ 371(c)(1), (2) Date Aug. 12, 2021,
PCT Pub. No. WO2020/171100, PCT Pub. Date Aug. 27, 2020.
Claims priority of application No. 2019-029518 (JP), filed on Feb. 21, 2019.
Prior Publication US 2022/0128735 A1, Apr. 28, 2022
Int. Cl. G02B 1/04 (2006.01); C08G 59/22 (2006.01); C08L 63/00 (2006.01); G02B 6/02 (2006.01); G02B 6/12 (2006.01); G02B 6/122 (2006.01); G02B 6/13 (2006.01)
CPC G02B 1/048 (2013.01) [C08L 63/00 (2013.01); G02B 6/02033 (2013.01); G02B 2006/12073 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An optical-waveguide-clad composition comprising:
a bisphenol type epoxy compound (A); and
an epoxy compound (B) containing at least one epoxy compound represented by the following formulae (3) to (8), and having a molecular weight of 350 to 2400:

OG Complex Work Unit Chemistry
where: p represents 1 to 10,

OG Complex Work Unit Chemistry
where: p represents 1 to 15, and q represents 1 to 5,

OG Complex Work Unit Chemistry
where: p represents 1 to 5,

OG Complex Work Unit Chemistry
where: p represents 1 to 15,

OG Complex Work Unit Chemistry
where: p represents 5 to 10.