Polarizing photochromic articles
US8545015B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2011 |
| Grant date | Oct 1, 2013 |
| Priority date | — |
| Expiry date | Mar 30, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/1335
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Provided are photochromic articles including a substrate, a primer layer that includes a first photochromic compound, and a photochromic-dichroic layer over the primer layer that includes a photochromic-dichroic compound. The first photochromic compound and the photochromic-dichroic compound each are selected such that the photochromic-dichroic compound has an unactivated state terminal minimum absorbance wavelength that is less than or equal to the unactivated state terminal minimum absorbance of the underlying first photochromic compound. The present invention also relates to such photochromic articles that further include a topcoat layer over the photochromic-dichroic layer, the topcoat layer including a second photochromic compound that has an unactivated state terminal minimum absorbance wavelength that is less than the unactivated state terminal minimum absorbance wavelength of the underlying photochromic-dichroic compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.