Polymerizable composition for optical material, optical material obtained from polymerizable composition, and manufacturing method of optical material
US10131767B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2014 |
| Grant date | Nov 20, 2018 |
| Priority date | — |
| Expiry date | Apr 15, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/521
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The polymerizable composition for an optical material of the present invention contains (A) at least one kind of isocyanate having two or more isocyanato groups, which contains aromatic isocyanate, (B) at least one kind of alcohol having two or more hydroxyl groups, (C) an acidic phosphoric acid ester represented by the following Formula (1), and (D) a benzotriazole-based compound, in which a ratio of secondary hydroxyl groups to the total molar number of primary and secondary hydroxyl groups contained in the alcohol (B) is equal to or greater than 50%, and the benzotriazole-based compound (D) is contained in an amount of 1 part by weight to 11 parts by weight with respect to a total of 100 parts by weight of the isocyanate (A) and the alcohol (B).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.