Polymerizable composition for optical material and optical material
US10081703B2 · kind B2 · utility
7Cited by
11References
13Claims
0Family size
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Key dates
| Filing date | Feb 5, 2015 |
| Grant date | Sep 25, 2018 |
| Priority date | — |
| Expiry date | Feb 5, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed is a polymerizable composition for an optical material containing polyisocyanate (a) including aliphatic polyisocyanate (a1) and a modified aliphatic polyisocyanate (a2); and polythiol (b) having a di- or higher functional thiol group, in which the modified aliphatic polyisocyanate (a2) is contained in the polyisocyanate (a) in the amount of less than or equal to 60 weight %.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.