Tinted contact lens and method of manufacture thereof: reactive

Details Tinted contact lens and method of manufacture thereof: reactive Tinted contact lens and method of manufacture thereof: reactive

1990-08-07

1991-06-04

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Nontextile, dyeing process or product, including inorganic...

Contact lens

8509, 8543, 8549, 8584, D06P 500, C09B 6204

Patent

active

050210688

ABSTRACT:
An improvement in a process for preparing a contact lens tinted over at least a portion of its surface, having the steps of forming a tinting solution having a reactive dyestuff and applying the tinting solution to a polymeric hydrogel contact lens material, wherein the improvement comprises adding an effective amount of an ammonium or phosphonium quaternary salt to the tinting solution before the applying step.

REFERENCES:
patent: 3887329 (1975-06-01), Hegar et al.
patent: 4313732 (1982-02-01), Teague et al.
patent: 4468229 (1984-08-01), Su
patent: 4553975 (1985-11-01), Su
patent: 4559059 (1985-12-01), Su
patent: 4929250 (1990-05-01), Hung et al.
patent: 4954132 (1990-09-01), Hung et al.
patent: 4963160 (1990-10-01), Hung et al.

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