US 12,259,523 B2
Anti-soiling coating for an ophthalmic lens
Prashant Santan, San Diego, CA (US)
Assigned to Essilor Laboratories of America, Inc., Dallas, TX (US)
Filed by Essilor Laboratories of America, Inc., Dallas, TX (US)
Filed on Aug. 17, 2023, as Appl. No. 18/451,172.
Application 18/451,172 is a continuation of application No. 16/823,717, filed on Mar. 19, 2020, granted, now 11,774,639.
Claims priority of provisional application 62/820,364, filed on Mar. 19, 2019.
Prior Publication US 2023/0393308 A1, Dec. 7, 2023
Int. Cl. G02B 1/18 (2015.01); C09D 1/00 (2006.01); C09D 5/33 (2006.01); C09D 183/08 (2006.01); G02B 1/115 (2015.01)
CPC G02B 1/18 (2015.01) [C09D 1/00 (2013.01); C09D 5/004 (2013.01); C09D 183/08 (2013.01); G02B 1/115 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An anti-soiling coating system for an ophthalmic lens, comprising: an optical lens;
a first coating applied to the lens, comprising an outer layer of silicon dioxide having exposed hydroxyl groups;
a hydrophobic second coating applied to the outer layer of the first coating, the second coating comprising a silane of the formula:
CF3(CF2)n(CH2)mSi(OR)3
wherein
m≥0,
n≥1, and
R is each independently H or an alkyl group, with the proviso that at least one R group is H or methyl and at least one R group is ethyl or an alkyl group different from methyl and ethyl, and
wherein a coating thickness of the hydrophobic second coating is 40 nm or more.