PROCESS FOR FORMING CLEAR, WETTABLE SILICONE HYDROGEL ARTICLES
First Claim
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1. A process comprising the steps of curing a reactive mixture comprising at least one silicone containing component, at least one hydrophilic component and at least one diluent having a Hansen solubility parameter, δ
- p between about 2 and about 7 to form an ophthalmic device having an advancing contact angle of less than about 80°
; and
removing said diluent with an aqueous solution.
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Abstract
The present invention is a process for forming ophthalmic devices such as contact lenses, comprising at least one silicone containing component, at least one hydrophilic component, at least one hydrophilic polymer and at least one diluent with a Hansen solubility parameter of about 2 to about 7. The processing of the ophthalmic device may be done using only aqueous solutions.
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Citations
24 Claims
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1. A process comprising the steps of curing a reactive mixture comprising at least one silicone containing component, at least one hydrophilic component and at least one diluent having a Hansen solubility parameter, δ
- p between about 2 and about 7 to form an ophthalmic device having an advancing contact angle of less than about 80°
; and
removing said diluent with an aqueous solution. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
- p between about 2 and about 7 to form an ophthalmic device having an advancing contact angle of less than about 80°
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23. A method comprising the steps of (a) forming a reactive mixture by mixing reactive components comprising at least one high molecular weight hydrophilic polymer and an effective amount of at least one hydroxyl-functionalized silicone-containing monomer in the presence of at least one diluent that is inert and easily displaceable with water and (b) curing the product of step (a) to form a biomedical device.
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24. A method comprising the steps of (a) forming a reactive mixture by mixing reactive components comprising at least one high molecular weight hydrophilic polymer, at least one siloxane containing macromer and an effective amount of at least one compatibilizing component in the presence of at least one diluent that is inert and easily displaceable with water and (b) curing the product of step (a) to form a biomedical device.
Specification