Method for making colored contact lenses and color coating...

Details Method for making colored contact lenses and color coating... Method for making colored contact lenses and color coating...

G - Physics

02

B

G02B 1/10 (2006.01) C08G 18/08 (2006.01) C08G 18/80 (2006.01) C08J 7/04 (2006.01) C09D 175/04 (2006.01) D06P 3/00 (2006.01) G02B 1/04 (2006.01) G02C 7/04 (2006.01)

Patent

CA 2162156

The invention relates a process for staining a contact lens, wherein at least part of the surface of the lens consisting of a polymer containing hydroxyl and/or carboxyl groups is coated with a colour coating containing as polymer-cross-linking agent a compound with at least two urethane groups or a mixture of such compounds, and urethane exchange is effected for causing cross-linking of polymers, by reacting the urethane groups with the hydroxyl and/or carboxyl groups of the bonding agent polymer and of the lens polymer.

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