Dye-containing polarizing film
US5354512A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1992 |
| Grant date | Oct 11, 1994 |
| Priority date | — |
| Expiry date | Aug 27, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/3033
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A dye-containing polarizing film comprising a polarizing film material and a metal-containing dye represented by the following formula (I): ##STR1## wherein Me is a transition metal selected from copper, nickel, zinc and iron; PA0 Z is hydrogen, lower alkyl, lower alkoxy, sulfo or amino which is unsubstituted or substituted; PA0 Q is a 1-naphthol or 2-naphthol residue which is unsubstituted or substituted and has no or an additional phenylazo or naphthylazo group unsubstituted or substituted and in which a hydroxy group is adjacent to the azo group bonding to the benzene ring having Z and is linked with the transition metal denoted by Me to form the complex; PA0 when Q is the naphthol residue having no additional azo group, then T is naphthyl which is unsubstituted or substituted; and PA0 when Q is the naphthol residue having an additional azo group, the T is a phenyl or naphthyl group which is unsubstituted or substituted, which film exhibits comparable high polarizing activity with film using iodine and superior durability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.