Contact lens with surface hydrophilic coating and preparation method thereof
By preparing a hydrophilic coating of phosphatidylcholine raw material on silicon hydrogel contact lenses, the shortcomings of silicon hydrogel contact lenses in both high oxygen permeability and comfort are solved, and higher hydrophilicity and comfort are achieved.
CN119529332APending Publication Date: 2025-02-28GANSU KANGSHILI CONTACT LENS CO LTD
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Patent Information
- Application Number
- CN202411822679.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-02-28
AI Technical Summary
Technical Problem
Existing silicone hydrogel contact lenses have shortcomings in both high oxygen permeability and comfort, which may cause foreign body sensation when worn.
Method used
The hydrophilic coating of silicon hydrogel contact lenses is prepared using phosphatidylcholine as the raw material, and the hydrophilicity and comfort of the final product are improved through transesterification and cross-linking reaction.
Benefits of technology
It achieves both high oxygen permeability and comfort of contact lenses, avoids the foreign body feeling caused by poor self-wetting properties of silicon hydrogels, and improves the hydrophilicity of the lenses.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention provides a contact lens with a surface hydrophilic coating and a preparation method thereof, and relates to the technical field of contact lenses. The preparation method comprises the following steps: mixing an acrylate monomer, a fluorine-containing siloxane compound, an initiator I, a cross-linking agent, glycerol and water to obtain a pre-polymerized solution I; mixing an unsaturated ester compound, N-vinyl pyrrolidone, polyvinyl alcohol, phosphatidylcholine, an initiator II, alcohol and dimethyl sulfoxide to obtain a pre-polymerized solution II; coating the pre-polymerization liquid II on the surface of a contact lens mold for heating and curing; and injecting the pre-polymerized liquid I into a mold for curing to obtain the contact lens with the surface hydrophilic coating. Phosphatidylcholine is adopted as a raw material to prepare the hydrophilic coating of the silicone hydrogel contact lens, the contact lens is of a three-layer structure, the outer layer is the hydrophilic gel coating and is soft and comfortable, the inner layer is a silicone hydrogel system and is high in oxygen permeability, the contact lens is more comfortable in the wearing process, and foreign body sensation can be effectively avoided.
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