US 11,945,895 B2
Photochromic polydiorganosiloxane vinylic crosslinkers
Yuan Chang, Atlanta, GA (US); Junhao Ge, Redwood City, CA (US); Steve Yun Zhang, Sugar Hill, GA (US); and Weihong Lang, Suwanee, GA (US)
Assigned to Alcon Inc., Fribourg (CH)
Filed by Alcon Inc., Fribourg (CH)
Filed on Mar. 11, 2021, as Appl. No. 17/199,158.
Claims priority of provisional application 62/987,925, filed on Mar. 11, 2020.
Prior Publication US 2021/0284806 A1, Sep. 16, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C08F 283/12 (2006.01); C08G 77/06 (2006.01); C08G 77/388 (2006.01); C08G 77/442 (2006.01); C08L 83/08 (2006.01); C08L 83/12 (2006.01); C09K 9/02 (2006.01); G02B 1/04 (2006.01)
CPC C08F 283/124 (2013.01) [C08G 77/06 (2013.01); C08G 77/388 (2013.01); C08G 77/442 (2013.01); C08L 83/08 (2013.01); C08L 83/12 (2013.01); C09K 9/02 (2013.01); G02B 1/043 (2013.01); C08G 2210/00 (2013.01); C08L 2312/06 (2013.01); C09K 2211/1088 (2013.01); G02B 2207/109 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A photochromic polydiorganosiloxane vinylic crosslinker, comprising:
(1) a polydiorganosiloxane segment comprising dimethylsiloxane units and at least one photochromic siloxane unit having one methyl substituent and one photochromic organic substituent having at least one photochromic moiety; and
(2) two terminal ethylenically-unsaturated groups.