US 11,999,824 B2
Composition for optical material and optical material
Yousuke Imagawa, Tokyo (JP); and Hiroshi Horikoshi, Tokyo (JP)
Assigned to MITSUBISHI GAS CHEMICAL COMPANY, INC., Tokyo (JP)
Appl. No. 17/271,106
Filed by MITSUBISHI GAS CHEMICAL COMPANY, INC., Tokyo (JP)
PCT Filed Aug. 21, 2019, PCT No. PCT/JP2019/032529
§ 371(c)(1), (2) Date Feb. 24, 2021,
PCT Pub. No. WO2020/050013, PCT Pub. Date Mar. 12, 2020.
Claims priority of application No. 2018-168144 (JP), filed on Sep. 7, 2018.
Prior Publication US 2021/0253798 A1, Aug. 19, 2021
Int. Cl. C08G 75/06 (2006.01); G02B 1/04 (2006.01)
CPC C08G 75/06 (2013.01) [G02B 1/041 (2013.01)] 6 Claims
 
1. A composition for optical materials, the composition comprising a compound (a) and/or a compound (b), the composition further comprising a compound (c), wherein:
the compound (a) is a compound represented by formula (1):

OG Complex Work Unit Chemistry
the compound (b) is a compound represented by formula (2):

OG Complex Work Unit Chemistry
and
the compound (c) is an episulfide compound.