Silicone hydrogels having a structure formed via controlled reaction kinetics
First Claim
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1. A silicone hydrogel formed from a reaction mixture comprisingabout 39 to about 75 wt % of at least one slow-reacting hydrophilic monomer;
- at least one silicone-containing component; and
at least one visible light photoinitiator;
wherein at least one of said silicone-containing component, optional additional hydrophilic components or both comprises at least one hydroxyl group and wherein said slow-reacting hydrophilic component and said silicone-containing component are selected to have a conversion ratio at 90% conversion of at least about 20.
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Abstract
The present invention relates to a process comprising the steps of reacting a reactive mixture comprising at least one silicone-containing component, at least one hydrophilic component, and at least one diluent to form an ophthalmic device having an advancing contact angle of less than about 80°; and contacting the ophthalmic device with an aqueous extraction solution at an elevated extraction temperature, wherein said at least one diluent has a boiling point at least about 10° higher than said extraction temperature.
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Citations
75 Claims
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1. A silicone hydrogel formed from a reaction mixture comprising
about 39 to about 75 wt % of at least one slow-reacting hydrophilic monomer; -
at least one silicone-containing component; and at least one visible light photoinitiator; wherein at least one of said silicone-containing component, optional additional hydrophilic components or both comprises at least one hydroxyl group and wherein said slow-reacting hydrophilic component and said silicone-containing component are selected to have a conversion ratio at 90% conversion of at least about 20. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75)
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57. A process for forming a silicone hydrogel comprising photocuring a reaction mixture comprising about 39 to about 75 wt % of at least one slow-reacting hydrophilic monomer;
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at least one silicone-containing component; and at least one photoinitiator; wherein said photocuring is completed in about 30 minutes or less and at least one of said silicone-containing component, optional additional hydrophilic components or both comprises at least one hydroxyl group;
wherein at least one of said silicone-containing component, optional additional hydrophilic components or both comprises at least one hydroxyl group and wherein said slow-reacting hydrophilic component and said silicone-containing component are selected to have a conversion ratio at 90% conversion of at least about 20.
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58. A process for forming a silicone hydrogel comprising photocuring via ebeam irradiation, a reaction mixture comprising about 39 to about 75 wt % of at least one slow-reacting hydrophilic monomer;
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at least one silicone-containing component; and at least one photoinitiator; wherein at least one of said silicone-containing component, optional additional hydrophilic components or both comprises at least one hydroxyl group;
wherein at least one of said silicone-containing component, optional additional hydrophilic components or both comprises at least one hydroxyl group and wherein said slow-reacting hydrophilic component and said silicone-containing component are selected to have a conversion ratio at 90% conversion of at least about 20.
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Specification