Polarizing film, method for producing same, optical film, and image display device
US10858553B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2017 |
| Grant date | Dec 8, 2020 |
| Priority date | — |
| Expiry date | Sep 9, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133528
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A polarizing film, wherein transparent protective films are laid, respectively, on/over both surfaces of a polarizer to interpose an adhesive layer (a) and an adhesive layer (b), respectively, between both surfaces of a polarizer, and transparent protective films. The adhesive layer (a) on/over one of both the surfaces has a glass transition temperature of −60° C. or higher and lower than 40° C. The adhesive layer (b) on/over the other surface has a glass transition temperature of 40° C. or higher. The adhesive layer (a) is a layer formed in the form of a cured product layer yielded by radiating an active energy ray to an active-energy-ray-curable adhesive composition (a). The active-energy-ray-curable adhesive composition (a) comprises, as radical polymerizable compounds, a component A having a logPow of −2 to 2, and a component B having a logPow more than 7, these logPow values being each an octanol/water distribution coefficient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.