Patent ID: 8507577
Filing Date: 2013-08-13
Classification: B29D,G02B

Abstract:
1. A process comprising the steps of curing a reactive mixture comprising at least one silicone-containing component, at least one hydrophilic component and a diluent comprising at least one protonated diluent or protonatable diluent having a Hansen solubility parameter, δp between about 2 and about 7 and at least one co-diluent having a Hansen solubility parameter, δp between about 2 and about 7 to form an ophthalmic device having a haze value of less than 100% and an advancing contact angle of less than about 80°; contacting the ophthalmic device with an aqueous solution which is capable of changing the Hansen solubility parameter, δp of the protonated or protonatable co-diluent to enhance water solubility, wherein said aqueous solution comprises at least about 70% water and (a) a pH of about 7 to about 10 when said diluent comprises at least one protonated diluent or (b) a pH of about 4 to about 7 when said diluent comprises at least one protonatable diluents and removing said diluent(s) with said aqueous solution.