Polymerizable composition for optical material, optical material, process for preparing polymerizable composition for optical material, and method of manufacturing optical material
US10954341B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 2016 |
| Grant date | Mar 23, 2021 |
| Priority date | — |
| Expiry date | Sep 15, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/0032
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polymerizable composition for an optical material includes an episulfide compound (A); an organic coloring matter (B); an UV absorber (C); and a polymerization catalyst (D), wherein the organic coloring matter (B) has a main absorption peak (P) between 565 nm and 605 nm in a visible light absorption spectrum, an absorption coefficient (ml/g·cm) of a peak apex (Pmax) exhibiting a maximum absorption coefficient of (P) is equal to or greater than 0.5×105, a peak width in an absorbance of ¼ of an absorbance of (Pmax) of (P) is equal to or less than 50 nm, a peak width in an absorbance of ½ of the absorbance of (Pmax) of (P) is equal to or less than 30 nm, and a peak width in an absorbance of ⅔ of the absorbance of (Pmax) of (P) is in a range of equal to or less than 20 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.