Invention Grant
- Patent Title: Method for making coated silicone hydrogel contact lenses
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Application No.: US16426506Application Date: 2019-05-30
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Publication No.: US11459479B2Publication Date: 2022-10-04
- Inventor: Yongxing Qiu , Chung-Yuan Chiang , Newton T. Samuel , Richard Govan , Ciara Dauenhauer
- Applicant: Alcon Inc.
- Applicant Address: CH Fribourg
- Assignee: Alcon Inc.
- Current Assignee: Alcon Inc.
- Current Assignee Address: CH Fribourg
- Agent Jian Zhou
- Main IPC: C09D133/02
- IPC: C09D133/02 ; B29D11/00 ; B29K683/00 ; G02C7/04

Abstract:
The invention is generally related to a method for producing coated silicone hydrogel contact lenses each of which has a hydrogel coating thereon and a relative high resistance to uptakes of polycationic antimicrobials as characterized by having a polyquaternium-1-uptake of less than 0.40 micrograms/lens. The hydrogel coating is formed by covalently attached a hydrophilic polymeric material onto a base coating of a polyanionic polymer on a SiHy contact lens. In this method, lower polyquaternium-1-uptake is achieved by using a rinse solution with a higher pH and/or a higher ionic strength (higher salt concentration) for rinsing a treated silicone hydrogel contact lens with a base coating of polyanionic polymer.
Public/Granted literature
- US20200172756A1 METHOD FOR MAKING COATED SILICONE HYDROGEL CONTACT LENSES Public/Granted day:2020-06-04
Information query
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