Regioselectively substituted cellulose esters and films made therefrom

US11034776B2 · kind B2 · utility

Assignee

• Eastman Chemical Company · US

Inventors

• Matthew Allen Boone · Jonesborough, US
• Christopher Harlan Burk · Spurgeon, US
• Peter Borden Mackenzie · Murrysville, US
• Jennifer A. Fish · Mount Joy, US
• Eduardo Gallas Cervo · Kingsport, US
• Elaine Beatrice Mackenzie · Enfield, US
• Robert Joseph Maleski · Kingsport, US
• Wesley Wayne McConnell · Grayslake, US
• David William Norman · Cary, US
• Tabatha Stearns · Kingsport, US
• Bin Wang · Beijing, CN

Key dates

• Filing date: Mar 27, 2020
• Grant date: Jun 15, 2021
• Expiry date: Mar 27, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G02F2413/13
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

Regioselectively substituted cellulose esters having a plurality of pivaloyl substituents and a plurality of aryl-acyl substituents are disclosed along with methods for making the same. Such cellulose esters may be suitable for use in films, such as +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.