Silicone hydrogel with composite hydrophilic and silicone polymers prepared with selective crosslink agents
US7901073B2 · kind B2 · utility
6Cited by
16References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2008 |
| Grant date | Mar 8, 2011 |
| Priority date | — |
| Expiry date | Jan 27, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F222/102
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A synthetic route to polymers comprised of at least two monomers each with a very different reactivity ratio by using a corresponding crosslink agent for each monomer. Novel crosslink agents are described that provide for the copolymerization of at least one hydrophilic monomer with at least one lens monomer typically used to prepare materials for ophthalmic lenses. The new crosslink agents have a relatively high selectivity for the hydrophilic monomer and limited reactivity with the crosslink agent used to polymerize the lens monomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.