Patent ID: 9568645
Date: 2017-02-14
CPC Classifications: B29D,B29K,G02B

Claim:
1. A soft contact lens comprising a silicone hydrogel material comprising: (1) first repeating units derived from N,N-dimethylacrylamide; (2) second repeating units derived from a siloxane vinylic monomer of formula (Ia)  in which R″, R (3) third repeating units derived from α,ω-acrylamide terminated polydimethylsiloxane or α,ω-bis(methacryloxyethoxypropyl)-terminated polydimethylsiloxane, wherein the soft contact lens has a relatively-long thermal stability as characterized by having an autoclave-induced change in elastic modulus, of about 5% or less, wherein EM is the averaged after-one-autoclave elastic modulus of the soft contact lens and is obtained by averaging the elastic modulus of 15 soft contact lenses measured after being autoclaved one sole time for 30 minutes at 121° C. in a phosphate buffered saline at a pH of 7.20±0.05 and EM is the averaged after-19-autoclaves elastic modulus of the soft contact lens and is obtained by averaging the elastic modulus of 15 soft contact lenses measured after being stored and autoclaved 19 times each for 30 minutes at 121° C. in a phosphate buffered saline at a pH of 7.20±0.05.