Optical materials composed of resin from thioacrylat esters
US4931521A · kind A · utility
27Cited by
4References
5Claims
0Family size
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Key dates
| Filing date | Oct 3, 1988 |
| Grant date | Jun 5, 1990 |
| Priority date | — |
| Expiry date | Oct 3, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for producing a resin having a high refractivve index which comprises radically polymerizing a material monomer, characterized in that said material monomer comprises [I] at least one polymerizable monomer selected from the group consisting of a polyfunctional thioacrylate and a polyfnctional thiomethacrylate (as an indispensable component), and optionally [II] at least one other polymerizable monomer which is radically polymerizable with said polymerizable monomer [I], a resin having a high refractive index produced by said process and optical materials, especially lenses and disk substrates prepared from said resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.