Composition for optical material, optical material and lenses
US6852780B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2001 |
| Grant date | Feb 8, 2005 |
| Priority date | — |
| Expiry date | Nov 20, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F222/1025
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed are optical materials which effectively absorb UV light up to the long wavelength band, have low specific gravity, and have balanced properties including impact and heat resistances; lenses; and optical material compositions as their starting materials. The composition contains a polymerizable monomer material consisting of at least one di(meth)acrylate of formula (1): (R: CH3 etc., Ph: a phenylene group; x, z: an integer of 1 to 5; y: 0 or 1) and at least one monomer (M) having at least one vinyl group in one molecule other than monomers of formula (1), and an additive selected from component (A1), (A2), or (B), or mixtures thereof, provided that components (A1) and/or (B) is contained, and when component (B) is contained, components (A1) and/or (A2) is also contained:
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.