Bleaching and dyeing; fluid treatment and chemical modification – Nontextile – dyeing process or product – including inorganic... – Contact lens
Patent
1995-05-19
1996-07-09
Einsmann, Margaret
Bleaching and dyeing; fluid treatment and chemical modification
Nontextile, dyeing process or product, including inorganic...
Contact lens
8509, 8651, 8552, 8541, 8582, 8611, 524745, 264 11, D06P 336, D06P 500, C09B 900
Patent
active
055340385
ABSTRACT:
Disclosed are processes for tinting hydrogel materials, such as contact lenses, by dissolving a leuco sulfate ester of a vat dye in an compatible monomer solution, adding an oxidizing initiator to the monomer solution, and oxidizing and polymerizing the monomer solution and dye in the same solution. In one aspect, the oxidation and polymerization are conducted simultaneously whereas in another embodiment, the oxidation of the soluble leuco sulfate ester of a vat dye to the insoluble vat dye and polymerization are conducted sequentially in the same reaction medium.
REFERENCES:
patent: 4093361 (1978-06-01), Erickson et al.
patent: 4157892 (1979-06-01), Tanaka et al.
patent: 4640805 (1987-02-01), Neefe
patent: 4719657 (1988-01-01), Bawa
patent: 4851471 (1989-07-01), Maltman et al.
patent: 4891046 (1990-01-01), Wittmann et al.
patent: 4997897 (1991-03-01), Melpolder
patent: 5034166 (1991-07-01), Rawlings et al.
patent: 5151106 (1992-09-01), Bhaumik et al.
patent: 5292350 (1994-03-01), Molock
patent: 5292610 (1994-03-01), Helling et al.
Trotman, E. R., "Dyeing and Chemical Technology of Textile Fibers", Vat Dyes, Fifth Edition, 498-526. no month available 1975.
McGraw-Hill, Encyclopedia of Science & Technology, 6th Edition, 442-446. no month available 1987.
Chapter XIV, Leucoesters of Vat Dyestuffs, pp. 257-261 no month available 1987.
Einsmann Margaret
Pilkington Barnes Hind Inc.
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