Resin for urethane lenses, lenses comprising the resin, and a process for preparation of the resin and the lenses
US5059673A · kind A · utility
21Cited by
1References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 3, 1990 |
| Grant date | Oct 22, 1991 |
| Priority date | — |
| Expiry date | Oct 3, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/041
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A resin for urethane lenses is here disclosed which is obtained by reacting an alicyclic isocyanate compound represented by the formula (I) ##STR1## and/or an alicyclic isocyanate compound represented by the formula (II) ##STR2## with at least one active hydrogen compound selected from the group consisting of polyol compounds, polythiol compounds except 1,2-bis[(2-mercaptoethyl)thio]-3-mercaptopropane, and thiol compounds having a hydroxyl group. In addition, lenses comprising this resin and processes for the preparation of the resin and the lenses are also disclosed herein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.