Polymerizable composition for optical material
US9678246B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Nov 1, 2013 |
| Grant date | Jun 13, 2017 |
| Priority date | — |
| Expiry date | Nov 1, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/256
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polymerizable composition for an optical material includes: (A) one or more isocyanates having two or more isocyanato groups that contains an aromatic isocyanate; (B) one or more alcohols having two or more hydroxyl groups; and (C) an acid phosphate represented by the following formula (1), in which a ratio of the molar number of a secondary hydroxyl group to the total molar number of primary and secondary hydroxyl groups contained in the alcohol (B) is 50% or higher.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.