Process for the encapsulation of preformed substrates by graft copolymerization
US4978481A · kind A · utility
60Cited by
9References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1989 |
| Grant date | Dec 18, 1990 |
| Priority date | — |
| Expiry date | Jan 13, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J7/16
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.