Curable photochromic composition including a segmented polymer
US12240996B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2019 |
| Grant date | Mar 4, 2025 |
| Priority date | — |
| Expiry date | Apr 1, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2211/1018
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention is directed to a curable photochromic composition including (a) a photochromic compound; (b) a segmented polymer having active hydrogen groups, at least one first segment, and at least one second segment, wherein (i) each first segment independently includes a fluorinated polymer segment, and (ii) each second segment independently includes a segment selected from a polycarbonate segment, a polyester segment, a polyether segment, a polyurethane segment, and a segment of copolymers thereof; and (c) a curing agent having reactive functional groups that are reactive with the active hydrogen groups of the segmented polymer, wherein the curing agent includes at least one of a polyisocyanate, a polyisothiocyanate, or an aminoplast. Also provided are photochromic films and articles, including multilayer articles, which include the curable photochromic composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.