Novel polysiloxane-polyurethanes and contact lens thereof
US4962178A · kind A · utility
26Cited by
8References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 3, 1988 |
| Grant date | Oct 9, 1990 |
| Priority date | — |
| Expiry date | Nov 3, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/043
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A novel polysiloxane polyurethane is described which is obtained by reaction of an isocyanate capped polysiloxane prepolymer with a polysiloxane-disilanol and which contains O-silyl-urethane linkages. The novel polysiloxane-polyurethanes are useful as oxygen permeable membranes or films, as bandages and drug carriers, for example in transdermal drug delivery, and especially as highly oxygen permeable, soft contact lenses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.