Bleaching and dyeing; fluid treatment and chemical modification – Nontextile – dyeing process or product – including inorganic... – Contact lens
Patent
1990-12-21
1992-09-29
Lieberman, Paul
Bleaching and dyeing; fluid treatment and chemical modification
Nontextile, dyeing process or product, including inorganic...
Contact lens
8509, 8543, 8549, 351162, 5253295, 525375, D06P 500
Patent
active
051511061
ABSTRACT:
A hydrophilic polymer, e.g., provided as a contact lens, is tinted by a method which incorporates a reactive dye into the polymer during formation of the latter. Following physical entrainment of the reactive dye in the polymer, the polymer is contacted with an aqueous solution of a base which catalyzes the reaction of the dye with the polymer. In this way, the dye becomes permanently covalently bound to the polymer.
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Bhaumik Debabrata
Chen Patrick K.
Allergan Inc.
Lieberman Paul
Swope Bradley A.
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