Colored hydrogel objects and their production-containing a water

Details Colored hydrogel objects and their production-containing a water Colored hydrogel objects and their production-containing a water

1985-04-26

1991-01-01

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

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

Contact lens

8543, 8625, 8629, 8650, 8651, D06P 500, D06P 300, C08J 320, C02C 704

Patent

active

049814877

ABSTRACT:
Shaped organic polymer hydrogels, especially contact lenses, are provided with opaque or translucent coloring so as to be capable of masking effectively any underlying color, e.g. the natural color of the eye. The hydrogel may be rendered opaque by precipitation in situ of a white or yellow water-insoluble, inorganic or organic material e.g. barium sulphate or an optical brightener and then colored with a suitable dyestuff.

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patent: 4494954 (1985-01-01), Suminoe et al.
patent: 4518390 (1985-05-01), Rabenau et al.
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patent: 4559897 (1985-12-01), Urrea et al.
patent: 4582402 (1986-04-01), Knapp
patent: 4634449 (1987-01-01), Jenkins
patent: 4702574 (1987-10-01), Bawa

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