Coating processes – Optical element produced – Transparent base
Patent
1989-01-13
1990-11-06
Bell, Janyce
Coating processes
Optical element produced
Transparent base
427302, 427322, 427377, 4273935, 427400, B05D 506, B05D 500
Patent
active
049685325
ABSTRACT:
A process for modifying the surface characteristics of a preformed polymeric substrate to impart hydrophilicity, hydrophobicity or other desired properties thereto comprises peroxidizing and hydroperoxidizing the surface of said preformed substrate using ozone, directing the subsequent graft polymerization of selected ethylenically unsaturated monomers essentially solely to the surface of said substrate to achieve the desired alteration of substrate surface characteristics while maintaining substrate structural integrity. Substrates so modified are useful in biomedical devices, semipermeable membranes, films, fibers and especially contact lenses.
REFERENCES:
patent: 3008920 (1961-11-01), Urchick
patent: 3070573 (1962-12-01), Beck
patent: 3968305 (1976-07-01), Oshimara et al.
patent: 4311573 (1982-01-01), Mayhan et al.
patent: 4589964 (1986-05-01), Mayhan et al.
Freeman Ellen M.
Janssen Robert A.
McCraw, Jr. Earl C.
Bell Janyce
Ciba-Geigy Corporation
Hall Luther A. R.
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