Method for preparing dye useful for tinting contact lens

Details Method for preparing dye useful for tinting contact lens Method for preparing dye useful for tinting contact lens

C - Chemistry, Metallurgy

09

B

C09B 1/34 (2006.01) C09B 69/10 (2006.01) D06P 1/382 (2006.01) D06P 1/52 (2006.01) D06P 3/34 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2140812

A highly purified monomer-dye unit is disclosed. A method for producing a highly purified monomer-dye unit is also disclosed. A hydrophilic monomer is reacted with a dye under conditions that yield highly pure monomer-dye units.

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