	US 12,092,792 B2
	Optical member with reduced low-molecular-weight siloxane content, and method for producing same
Takayuki Motoyanagi, Saitama (JP); Satoshi Endo, Saitama (JP); Hiroki Hirakuri, Saitama (JP); Nobuyuki Tomizawa, Saitama (JP); Masashi Nemoto, Saitama (JP); and Takeru Kawaguchi, Saitama (JP)
Assigned to ASAHI RUBBER INC., Saitama (JP)
Appl. No. 17/417,674
Filed by ASAHI RUBBER INC., Saitama (JP)
PCT Filed Dec. 27, 2019, PCT No. PCT/JP2019/051378 § 371(c)(1), (2) Date Jun. 23, 2021, PCT Pub. No. WO2020/138401, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 2018-247181 (JP), filed on Dec. 28, 2018.
Prior Publication US 2022/0113451 A1, Apr. 14, 2022
Int. Cl. G02B 1/04 (2006.01); B29C 71/02 (2006.01); C08J 7/02 (2006.01); C08L 83/04 (2006.01)

CPC G02B 1/04 (2013.01) [C08J 7/02 (2013.01); C08J 7/08 (2013.01); C08L 83/04 (2013.01); C08J 2383/04 (2013.01); C08L 2201/10 (2013.01)]

11 Claims

1. A production method, comprising:

producing an optical member that transmits or guides light, the optical member having

a silicone resin or a silicone rubber having a total content of low-molecular-weight siloxanes D₃-D₂₀of 100 ppm or less;

wherein, the producing includes

a removing step (A) that reduces the content of low-molecular-weight siloxane D₃-D₁₀; and

a removing step (B) that reduces the content of low-molecular-weight siloxane D₁₁-D₂₀;

the removing step (A) being a different process than the removing step (B) to increase the efficiency of removal of the low molecular-weight siloxane D₃-D₂₀from the optical member.