US 12,240,944 B2
Optical lens
Kyosuke Yamada, Osaka (JP); Manabu Matsui, Osaka (JP); Takatsune Yanagida, Osaka (JP); Kazuyoshi Ogasawara, Osaka (JP); Kazunori Nunome, Osaka (JP); Keisuke Sato, Osaka (JP); Tatsuya Oyama, Osaka (JP); and Yasuhiko Tomonari, Osaka (JP)
Assigned to TEIJIN LIMITED, Osaka (JP)
Appl. No. 17/434,138
Filed by TEIJIN LIMITED, Osaka (JP)
PCT Filed Feb. 26, 2020, PCT No. PCT/JP2020/007855
§ 371(c)(1), (2) Date Aug. 26, 2021,
PCT Pub. No. WO2020/175577, PCT Pub. Date Sep. 3, 2020.
Claims priority of application No. 2019-034940 (JP), filed on Feb. 27, 2019.
Prior Publication US 2022/0146713 A1, May 12, 2022
Int. Cl. C08G 64/06 (2006.01); C08G 63/64 (2006.01); C08G 63/672 (2006.01); C08G 64/04 (2006.01); C08G 64/30 (2006.01); C08L 69/00 (2006.01); G02B 1/04 (2006.01); G02B 13/00 (2006.01); C08G 64/08 (2006.01)
CPC C08G 64/06 (2013.01) [C08G 63/64 (2013.01); C08G 63/672 (2013.01); C08G 64/04 (2013.01); C08G 64/30 (2013.01); C08L 69/005 (2013.01); G02B 1/041 (2013.01); G02B 13/002 (2013.01); C08G 64/08 (2013.01); C08L 2201/10 (2013.01); C08L 2203/20 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An optical lens comprising a thermoplastic resin, wherein the thermoplastic resin contains a repeating unit represented by the following formula (1):

OG Complex Work Unit Chemistry
wherein rings Z represent the same or different aromatic hydrocarbon rings, R1 and R2 each independently represent a hydrogen atom, a halogen atom or a hydrocarbon group of 1 to 12 carbon atoms optionally containing an aromatic group, Ar1 and Ar2 each represent an aromatic group optionally containing a substituent, L1 and L2 each independently represent a divalent linking group, j and k each independently represent an integer of 0 or greater, m and n each independently represent 0 or 1, and W is at least one group selected from groups represented by the following formula (2) or (3),

OG Complex Work Unit Chemistry
wherein X represents a divalent linking group,
wherein the thermoplastic resin has a b* value according to the CIE1976 (L*a*b*) color system of 10.0 or lower, as measured using a 13 mass % solution in methylene chloride (a solution of 1.0 g dissolved in 5 ml of methylene chloride), and has a refractive index (nD) and Abbe number (ν) satisfying the following mathematical formula (A):
nD≤−0.02×ν+2.040  (A)
(where 1.660<nD).