Process for graft copolymerization on surfaces of preformed subs

Details Process for graft copolymerization on surfaces of preformed subs Process for graft copolymerization on surfaces of preformed subs

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.

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