Actinically-crosslinkable siloxane-containing copolymers
US8642712B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 2010 |
| Grant date | Feb 4, 2014 |
| Priority date | — |
| Expiry date | Apr 8, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/04
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention provide a class of actinically-crosslinkable silicone-containing prepolymers obtained by functionalizing an intermediary copolymer to have two or more thiol or ethylenically-unsaturated groups covalently attached thereto, wherein the intermediary copolymer is an atom-transfer radical polymerization (ATRP) product of a reactive mixture comprising a polysiloxane ATRP macroinitiator and at least one hydrophilic vinylic monomer. The present invention is also related to silicone hydrogel contact lenses made from a prepolymer of the invention and methods for making the contact lenses in a cost-effective way and with high consistency and high fidelity to the original lens design.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.