Aromatic polythiol compound for optical material
US11279673B2 · kind B2 · utility
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Key dates
| Filing date | Jul 6, 2017 |
| Grant date | Mar 22, 2022 |
| Priority date | — |
| Expiry date | Jul 6, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B3/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An embodiment relates to an aromatic polythiol compound for optical materials, and the aromatic polythiol compound according to the embodiment contains a phenyl group and a large number of sulfur atoms in its polythiol structure so that a polymerizable composition and an optical material obtained therefrom have excellent optical properties such as high refractive index and low specific gravity, as well as excellent mechanical properties such as low cure shrinkage; thus, they can be advantageously used for producing various plastic optical lenses such as eyeglass lenses and camera lenses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.