Method for preparing silicone graft copolymers
US4229273A · kind A · utility
27Cited by
1References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 23, 1979 |
| Grant date | Oct 21, 1980 |
| Priority date | — |
| Expiry date | May 23, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2383/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to the preparation of graft copolymers from silicones. The method comprises subjecting an article such as a contact lens previously moulded from silicone resins to an UV irradiation step with radiations of wave-length from 1800 to 4000 angstroms, in the presence of oxygen, and in a subsequent step contacting said article with an unsaturated monomer compound at a temperature sufficient to ensure the grafting of said compound on the silicone resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.