Process for the encapsulation of preformed substrates by graft c

Details Process for the encapsulation of preformed substrates by graft c Process for the encapsulation of preformed substrates by graft c

1989-01-13

1990-12-18

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Utilizing plasma, electric, electromagnetic, particulate, or...

264 17, 264 26, 427164, 427301, 427302, B29D 1100

Patent

active

049784811

ABSTRACT:
A process for encapsulating a preformed polymeric substrate comprises peroxidizing and hydroperoxidizing the surface of said preformed substrate using ozone and then carrying out a crosslinked graft copolymerization of selected ethylenically unsaturated monomers both on and surrounding (encapsulating) said substrate. Such encapsulation of substrates provides protective coatings, ablative coatings and, particularly, soft skirts for hard contact lenses.

REFERENCES:
patent: 3008920 (1961-11-01), Urchick
patent: 3070573 (1962-12-01), Beck
patent: 3489491 (1970-01-01), Creighton
patent: 3916033 (1975-10-01), Merrill
patent: 4171878 (1979-10-01), Kivaev et al.
patent: 4208362 (1980-06-01), Deichert et al.
patent: 4311573 (1982-01-01), Mayhan et al.
patent: 4589964 (1986-05-01), Mayhan et al.
patent: 4761436 (1988-08-01), Kohno et al.

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