Retardation film
US8119739B2 · kind B2 · utility
2Cited by
3References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2007 |
| Grant date | Feb 21, 2012 |
| Priority date | — |
| Expiry date | Mar 11, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2333/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention provides a retardation film, composed primarily of an acrylic polymer, with transparency, heat resistance, and large retardation. The retardation film of the present invention is composed primarily of an acrylic polymer. The film has an in-plane retardation of from 130 nm to 500 nm, inclusive, per 100 μm thickness at a wavelength of 589 nm. The film has a total light transmittance of not less than 85%. The retardation film has a glass transition temperature of preferably from 110° C. to 200° C., inclusive. The acrylic polymer, which is the primary component, preferably has a lactone ring structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.