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Silicone hydrogel lens with a crosslinked hydrophilic coating
US8944592B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8944592-B2 |
| Application number | US-201313948206-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 23, 2013 |
| Priority date | Jul 30, 2010 |
| Publication date | Feb 3, 2015 |
| Grant date | Feb 3, 2015 |
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Abstract
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The invention is related to a cost-effective method for making a silicone hydrogel contact lens having a crosslinked hydrophilic coating thereon. A method of the invention involves heating a silicone hydrogel contact lens in an aqueous solution in the presence of a water-soluble, highly branched, thermally-crosslinkable hydrophilic polymeric material having positively-charged azetidinium groups, to and at a temperature from about 40° C. to about 140° C. for a period of time sufficient to covalently attach the thermally-crosslinkable hydrophilic polymeric material onto the surface of the silicone hydrogel contact lens through covalent linkages each formed between one azetidinium group and one of the reactive functional groups on and/or near the surface of the silicone hydrogel contact lens, thereby forming a crosslinked hydrophilic coating on the silicone hydrogel contact lens. Such method can be advantageously implemented directly in a sealed lens package during autoclave.
First claim
Opening claim text (preview).
What is claimed is: 1. A readily-usable silicone hydrogel contact lens, comprising a silicone hydrogel material and a crosslinked hydrophilic coating thereon, wherein the crosslinked hydrophilic coating is attached onto the silicone hydrogel contact lens through neutral, hydroxyl-containing covalent linkages each of which is obtained by reacting, in a crosslinking reaction at a temperature from about 40° C. to about 140° C., one positively-charged azetidinium group with one functio…
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- B29D11/00067Primary
Operations & Transport · mapped topic
Physics · mapped topic
Physics · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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Frequently asked questions
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- What does patent US8944592B2 cover?
- The invention is related to a cost-effective method for making a silicone hydrogel contact lens having a crosslinked hydrophilic coating thereon. A method of the invention involves heating a silicone hydrogel contact lens in an aqueous solution in the presence of a water-soluble, highly branched, thermally-crosslinkable hydrophilic polymeric material having positively-charged azetidinium groups…
- Who is the assignee on this patent?
- Novartis Ag
- What technology area does this patent fall under?
- Primary CPC classification B29D11/00067. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Feb 03 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).