US 11,754,754 B2
Silicone hydrogels comprising N-alkyl methacrylamides and contact lenses made thereof
Azaam Alli, Jacksonville, FL (US); and Dola Sinha, Jacksonville, FL (US)
Assigned to Johnson & Johnson Vision Care, Inc., Jacksonville, FL (US)
Filed by Johnson & Johnson Vision Care, Inc., Jacksonville, FL (US)
Filed on Aug. 17, 2021, as Appl. No. 17/403,973.
Application 17/403,973 is a division of application No. 15/609,088, filed on May 31, 2017, granted, now 11,125,916.
Claims priority of provisional application 62/358,967, filed on Jul. 6, 2016.
Prior Publication US 2021/0382203 A1, Dec. 9, 2021
Int. Cl. G02B 1/04 (2006.01); B29D 11/00 (2006.01); C08F 283/12 (2006.01); C08F 290/06 (2006.01); C08G 77/52 (2006.01); C08J 3/075 (2006.01); C08L 83/14 (2006.01); G02C 7/04 (2006.01); C08F 220/56 (2006.01); C08L 33/26 (2006.01); C08L 51/08 (2006.01); C08L 101/12 (2006.01); B29K 83/00 (2006.01); B29K 105/00 (2006.01)
CPC G02B 1/043 (2013.01) [B29D 11/00048 (2013.01); C08F 283/122 (2013.01); C08F 290/068 (2013.01); C08G 77/52 (2013.01); C08J 3/075 (2013.01); C08L 83/14 (2013.01); G02C 7/049 (2013.01); B29K 2083/00 (2013.01); B29K 2105/0061 (2013.01); C08G 2210/00 (2013.01); C08J 2383/04 (2013.01); C08J 2383/08 (2013.01); C08L 2205/025 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A process for making a composite contact lens, comprising:
(a) dosing a first silicone hydrogel formulation containing at least one N-alkyl methacrylamide and at least one silicone-containing component into a first mold,
(b) partially curing the first silicone hydrogel formulation into a gel,
(c) dosing a second silicone hydrogel formulation into the first mold
(d) allowing time for the second silicone hydrogel formulation to imbibe into the gel,
(e) placing a second mold on top of the first mold, and
(f) fully curing the combination to form the composite contact lens,
wherein the composite contact lens contains a central region comprised of a first silicone hydrogel derived from the first silicone hydrogel formulation and a peripheral region comprised of a second silicone hydrogel derived from the second silicone hydrogel formulation, and
wherein the first silicone hydrogel has a modulus of at least about 1000 psi and a water content of at least about 10%.