Cellulose ester optical films

US8729253B2 · kind B2 · utility

Assignee

• Eastman Chemical Company · US

Inventors

• Charles Michael Buchanan · Kingsport, US
• Michael Eugene Donelson · Kingsport, US
• Elizabeth Guzman-Morales · Kingsport, US
• Peter Borden Mackenzie · Murrysville, US
• Bin Wang · Beijing, CN

Key dates

• Filing date: Mar 1, 2012
• Grant date: May 20, 2014
• Expiry date: Mar 1, 2032

Classification

• Technology area (CPC G): Physics
• CPC primary: G02F1/133631
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Regioselectively substituted cellulose esters having a plurality of aryl-acyl substituents and a plurality of alkyl-acyl substituents are disclosed along with methods for making the same. Such cellulose esters may be suitable for use in optical films, such as optical films having certain Nz values, −A optical films, and/or +C optical films. Optical films prepared employing such cellulose esters have a variety of commercial applications, such as, for example, as compensation films in liquid crystal displays and/or waveplates in creating circular polarized light used in 3-D technology.