	US 12,297,323 B2
	Polysiloxane vinylic crosslinkers with high refractive index
Frank Chang, Cumming, GA (US); Thomas M. Moy, Cumming, GA (US); and Adam K. Sniady, Lilburn, GA (US)
Assigned to Alcon Inc., Fribourg (CH)
Filed by Alcon Inc., Fribourg (CH)
Filed on Mar. 22, 2022, as Appl. No. 17/700,734.
Claims priority of provisional application 63/164,982, filed on Mar. 23, 2021.
Prior Publication US 2022/0306810 A1, Sep. 29, 2022
Int. Cl. C08G 77/442 (2006.01); C08G 77/20 (2006.01); C08G 77/60 (2006.01); G02B 1/04 (2006.01); C08G 77/00 (2006.01)

CPC C08G 77/442 (2013.01) [C08G 77/20 (2013.01); C08G 77/60 (2013.01); G02B 1/043 (2013.01); C08G 77/80 (2013.01)]

20 Claims

1. A polysiloxane vinylic crosslinker, comprising:

(1) a polysiloxane segment comprising dimethylsiloxane units and aryl-containing siloxane unit having one methyl substituent and one organic substituent having up to 45 carbon atoms and at least one aryl moiety which is linked to Si atom through a linker having at least 2 carbon atoms; and

(2) ethylenically-unsaturated groups.