Process for molding a highly-refractive plastic lens
US5013496A · kind A · utility
17Cited by
8References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1989 |
| Grant date | May 7, 1991 |
| Priority date | — |
| Expiry date | Feb 15, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/775
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for producing a plastic lens having a high refractive index and profile regularity which includes forming a mixture of one or more of sulfur-containing aromatic polyisocyanate compounds, one or more of active hydrogen compounds selected from the group consisting of polyol compounds and polythiol compounds, and at least one internal mold releasing agent. Then subjecting the resulting mixture to casting polymerization, to form the plastic lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.